I like very much the idea of the black mesh. It's pretty, functional, probably easy to work with if you want to insert anything throw it, and mostly, it should reminds evryone the F40 😉 (it does not need to be exactly the same kind of mesh of course)
As an engineer, I am not in love with the horizontal cooler. Have you considered placing the larger cooler in the middle of the space left by the bumper delete? It seems like that would be the styling you were originally after and provide more functionality without the oddball ducting. Just a thought. BTW, I love the channel and can’t wait to see the final product.
I love the Mesh, I would make it more open like an expanded metal vs a perf plate. It makes the car look soo much lower and wider. Maybe something like the GMA T50 has. Would bring a modern touch to the car. Or something like the F40 with expanded metal and a nice thin trim piece with exposed fastener heads.
@@StanleyKubick1 it's not extruded, It's expanded. Expanded metal came stock on a many Ferraris before and after this car to include the F40. It works great for heat removal.
@@tomc5982 agreed but he stated in a previous episode he doesnt want to make custom carbon parts. If he was closer, I would just come make them for him.
10:20 There probably will be a low pressure zone over the hood of the car and behind it, so getting air in from the side duckts and just pulling it out towards these low pressure zones would probably be the best move. In any case, Fans would probably help.
Like you have stated it is what it is. This material shortage or whatever we are calling it affects everything. You are doing what you can and folks just need to deal with it. Great project and video. Thank you!
Keep up the progress. Dont get bogged down on the tiny details, in the end its still a homebrew street car. Having it start/run is vastly more important to the end goal than the philosophy of each bolt.
NACA ducts will work well in the bottom of the floor - also depends on your plans for a diffuser .. lotus uses a few naca ducts in the floor pan to get air into the engine bay ..
I would swap the connections for the oil cooler so that the pump line goes under the bracket and fits to the first fitting to the cooler, then run the second fitting to the return feed of engine to shorten line and not run through any hard surfaces that may cause a future issue, then I would have the air flow ducting come from the top end when the hatch is down to feed the turbulent air into the louvre zone or vented last half of the hatch and maybe have under mesh to protect the area from any debris to the oil cooler, third I could see that you could use the factory inlets of the body to use it for brake cooling instead? I love this project and the 288, 308 have always been my all time favorite Ferrari aside from the iconic F40 coming in at a close second. KEEP UP THE BEAUTIFUL WORK MIKE
If you bring the ducting to the top, on the boot lid, and put a "wing" shaped vent, it will create a low pressure zone that will suck the air to the top, which will pull the air from the bottom. I also think the mesh looks "tacky" and louvers would look a lot better, either 3D printed ones, or you could take the front grill from another car, like a MK1 VW golf, and use that, or even just flat bar evenly spaced, because the front grill, the vents above the lights and the vents on the side are all louvers so it would look better to keep it all the same.
I agree front and back the same style. My thoughts were just some larger holes type mesh or printed something. But your idea of a grille/ straight bars I think could look great as well.
I had a similair idea. Also, since hot air wants to rise, the ducting orientation like this will have less flow resistance. Yes, when driving that won`t matter much but when idling or/and when driving slow it will work against each other rather than it compliments each other.
I like the idea of drawing the air up, however since an exhaust will presumably sit right below it do you think it'll draw the hot air from the exhaust? then again I'm sure some sort of exhaust wrap could help alleviate that as an issue. also you can never go wrong with louvers!
@@Bugalona well there is going to be heat from the engine and exhaust either way. Maybe adding little "scoops" on either side, just below the bumpers behind the back wheels could help suck fresh air in. Also if your ducting is going from bottom to top, you can put fans in the ducts to stuck air though when the thermostat clicks on.
Came here after watching a donut media video about swappped cars yesterday, and been binch watching the whole series in one go! Awesome content and great balans between explaining and working on the car. Keep it up!
Cooling - Make composite tubes that snake their way there, around and through whatever. Can be done in as many slip-fit pieces as necessary, and can change shape, and bend any conceivable amount. Super light, won’t corrode, and there are relatively inexpensive methods to achieve it.
maybe you can build a diffuser that comes all the way up to where the top of the mesh is rn. Im really hoping for some wild aero on this car, as long as it's functional. I love this build, I own a miata, and it's hard to be unique with that car. You've inspired me to try something unique, I want to put a miata drivetrain in an old DAF66 (I'm Dutch, hence the DAF).
About the mesh, imo if you made it with bent edges, like a very shallow and long rectangular box, it would probably look better, as the edges will have a tiny curvature rather than terminating immediately, possibly matching the car's curves better and looking more refined as well. This will allow for cleaner mounting too, you wouldn't need tabs but rather would use the bent edges to mount the mesh on the bumper. The project is nearing completion, can't wait to see how it drives and performs etc, it will be epic.
If you're gonna have a diffuser underneath the car I'd suggest ducting air from under the car, through the oil cooler, and out the mesh area you have. All you'd have to do is cut out a spot in the diffuser and maybe throw a mesh underneath the cooler to protect from rocks. Behind the car is where theres the lowest pressure so if you have a diffuser which is designed to create a high pressure zone under the car it'll suck that shit right through your oil cooler. Someone should definitely confirm though I'm a mechanical engineer but fluids was not my best class Love the build by the way I can't wait to see the finished product! You're doing great work dude
Whoever is making your wheels should make them with exactly the specs you ordered. That's one of the reasons why custom built wheels are so expensive. BTW, love this build. 308's are one of my all time favorite cars (looks wise anyway).
Just a couple questions that came to mind listening to the concerns of wheel variables in the last segment. While I completely dig the idea of having the exact wheel you want on this car, it is a car that you plan to run on track. That said, with them essentially being a one off modified wheel, what happens if you go off track and damage one? Are they something that can be easily replaced? I have no doubt its been thought of, but would it not have been easier to take the chosen design to a wheel company and have a new set made to your specs versus modifying an original set? Great project though and I, like many others for sure, am looking forward to seeing the finished product. This entire series has been awesome and its great to see someone show the minute details that go into builds like this.
Really loved your original cooler location. That said I prefer the larger cooler, it will help a lot. I have concerns using NACA ducts in the engine lid area as it is likely a negative pressure location and will now likely suck air out, no matter what you do. I suggest then the input is below, meaning the output is then more likely better in the rear, near the license plate OR your new rear grill. Surely the cooler should sit upright behind your mesh panel?! Then duct from under and in front of your diffuser, through the cooler and out the mesh! I also think you need to consider your exhaust path before finalizing this! Cheers.
In the end it is your car, but since you asked :) , I would go with hexagonal 3 piece mesh. single piece always makes it looks cheap. Having multi parts gives thsose multiple reflections. another idea I had when I first looked at the back aend was 2 larger radiators on boths sides with a gap in between where you fit an F1 style brake light. you will still need black mesh over it to tidy it up but you should thing about the wing mounts etc as well as they will all be one at the end. I think it is turning out gorgeous.
I'm not an engineer of speed and aeromatics so testing may be required on your end to see where negative pressure exists. 💡 Idea#1 If the negative pressure is at the top of the engine cover you could have the pickup under the car facing forward. Air would travel along the bottom of the car into the duct through the cooler and out the cover. 💡 Idea #2 If there is more negative at the rear of the car then the intake would be in the cover(testing would be required to see If a scoop would be required) and the exit would be below facing rearward allowing the air to be pulled through instead of pushed. Less bends and more direct either way. I'm sure whatever you come up with will be cool 😎. I came for the model A, but this 308 is gonna be 🔥. 🍻
I like the slats idea. I think painting it black will help picture it. Maybe draw it up and play with exhaust exit and style that you want and then work your coolers around what you want it to look like. Might even wind up with room to set the coolers vertically and help with airflow.
I think the idea of having a laser cut piece with slats or some sort of venting is a great idea. Scrap the mesh that looks like chicken wire 🐔. It's a Ferrari for God's sake! LOL Always look forward to your video content. Keep up the good work...
I agree, even painted black it would detract from how awesome this is shaping up to be, shame the oil coolers idea didn’t work, but sensible to change that
First of all thank you for the shoutout and for laying down the challenge to offer some input :) I think your answer could come from Ferrari themselves to address two issues. The rear mesh does not look right. The shape of the 308 really needs a that trim euro bumper as you will have in the front to get the aesthetics right. Also I think the oil cooler could be in a better place. To that end I urge you to Google images 'Ferrari 208 Turbo Rear'. In the European model Ferrari 208 Turbo (2 liter displacement rather than 3 liters because of tax laws) uses a split rear bumper with a mesh piece in the middle. This keeps the clean Pininfarina styling but offers an opportunity to vent the oil cooler which I would look at mounting vertically similar to how you had the small coolers on either side. If you set the cooler nice and far back and vertical in this area I can't see how you will be compromised for space as it will still allow the exhaust to be vented through the rear panel (not my choice) or into the diffuser which I much prefer. Google images 'stefan johansen monaco ferrari' and you'll know where the inspiration came from :) As for how to feed the oil cooler I think you are too far from the side scoops to do anything meaningful with them. NACA ducts on the surface of the rear lid could work very well and look cool too. Another option is putting them in the upper rear quarters behind the wheels but I'm not so sure of the look of that. For inspiration search for images of rear differential coolers on Trans Am race cars because this is an issue they deal with all the time. This might send you down the path of just fitting an electric fan to the cooler if ducting is a problem. Either way that path of research will really open your eyes to what is possible. I hope this helps and best of luck with future progress. I'll be following eagerly.
NACA ducts on the rear deck would likely compromise the airflow for the rear wing. As an alternative, the bottom of p2 and top of p3 of the following link shows how Pratt & Miller handled ducting for the rearmount radiator/transcooler on the C7R. You've got an engine in the way so you can't use the exact same routing, but you don't need as much air either. I think you could probably get away with the side scoops if you ran flex ducting to both of them into a joint plenum (or a split plenum) on the face of the oil cooler and dual puller fans on the back side so that you're ensuring airflow. But that may also require rotating the oil cooler out of the horizontal... motoiq.com/nerds-eye-view-chevrolet-corvette-c7-r/2/
if the wheel lips are the wrong offset then you have 2 options ...... leepu spacers or trailer arches PMSL. Great update Mike I think NACA ducts will work if the area above is high pressure area. you might need scoops on the ducts to peal out into the airflow above if there isnt the flow or pressure present directly above them tho, need to get someone to run some models in ansys for you. Or just do what I do and guess !
I think a NACA duct on the belly pan will be a good idea. You could exhaust the hot air outside the mesh grille along with everything else. It can definitely help with your low pressure zone behind the car to keep airflow attached which could reduce drag.
Stopped halfway through this video to google the mesh at the back of an F40. That mesh isn’t slick and fancy. It’s basic but very very neat. F40 at its core is a race car so the mesh is race car appropriate. Excited to see what you end up doing.
Just to give another possible way of accomplishing your airflow to the oil cooler ... Look at the Ferrari 288 Evolutzioni rear naca ducts over each of the rear portions of the rear wheel arches. You might find something that suites your needs there. Their reason for air intake at that location served similar need for airflow to and through that area as well. Mesh is classic, Aluminum fins could be a signature part of your design though... Great possibilities there. Love this project. Thank you.
For the cooler asit is now you will have a high pressure low temp zone under and a low pressure above so that should be fine could allways add a fan later if necessary. With the exhaust come out in the centre of the mesh for a straight pipe
You are doing amazing work! The thing that always worried me about placing the coolers in the rear corner bumper locations was that it's a significant high-pressure area until you get to pretty high speeds on a car with Kammback / sharp cutoff rear like the 308. In other words, depending on the local shape, at speeds up to 60 or so, air down in that area is trying to get into the engine bay rather than vice-versa. Intuitively it seems like air should get sucked out of the engine bay by airflow there, but it's the opposite until you get going quite fast. Looking at what you are doing now, I wonder if your fresh air source for the horizontally mounted cooler is actually the openings vacated by smaller corner coolers you just removed. In other words, you probably have a nice, high-pressure source of fresh air behind the car, sucked in through those corner bumper mesh inlets, duct the air into the top of the horizontal cooler, and then exit down into the faster air (low pressure) flowing under the back of the car. If you end up putting in a diffuser, all the better. That would scavenge air down through the cooler and out the back even better if it exits into the diffuser airstream.
^This. The top of the engine cover may also be higher pressure due to the sharp corner where the roof ends, some CFD or wind tuft testing may be worthwhile to confirm. Exiting into the diffuser/underbody though is definitely the way to go. Might be worth adding a stay/support to the oil cooler on the opposite side of the current mounts. When its full of oil, that cooler will be quite heavy and will act like a lever on the current mounts, possibly fatiguing the welds over time due to vibration.
You do NOT want the cooler's airflow to exit into the diffuser, especially if it's going to have to make a 90-degree change in direction. The diffuser needs laminar flow to work, and dumping a bunch of turbulent post-cooler air into the middle of the curve or behind it (given the current positioning) will wreak havoc on the flow. If it exits into the no-man's land *above* the diffuser and exits out the back of that area (between the top edge of the diffuser exit and the bottom edge of the bodywork where the bumper used to be) that might work out OK.
@@jsquared1013 if you ran a duct from cooler into diffuser, but curved so that it aligned with diffuser airflow, it could act as venturi to draw air through the cooler… sizing might be critical - not sure how much that might interfere with diffuser airflow. Not sure how well this translates, but this concept is how dust aspirators work on certain ag and construction vehicles - venturi pipe in exhaust draws dust out of aspirator on air intake…
To cool the oil cooler, I would put naca ducts into the diffuser to draw fast moving high energy air from under the car, I would also do dual exhaust tips on the outer edges of said naca ducts to keep flow attached throughout the diffuser, especially at it's most aggressive or curved section.
Totally understand the wheel situation, love the mesh, under the assumption it would be black in its final form, and would personally draw air from the bottom of the radiator and use the mesh as an exhaust. The mesh will also help manage some of the engine bay temps as the cool air drawn in from above through the engine bay hatch will be able to exit through the mesh in the back creating a vacuum that will draw (probably) most of the radiant heat away from the engine and other components. Another reason to keep the side air vents clear as it will create a clear path for all the air to follow from the front of the engine bay to the back of the car.
The slats on the engine cover are vents for when the car is slow or stationary, they are not inlets. The airflow behind the rear window is super turbulent.
I've just finished binge-watching the series, after hearing about it on Donut Media the other day. Awesome build, crazy to see how far its come. Makes me want to turn wrenches.
Horizontal slats for sure. I think if you did the slats you could color match the panel to the final color too and the void in the slats would be black enough to give a nod to the “black accent” you were looking for.
Make the slats for the rear the same way the gas filler cap door by the window is, It would really compliment each other, Discovered your channel only a few days ago and have almost cought up on the ferrari build. Keep it up. Great production quality on the videos and great tips/tricks. Just awesome.
Nice to see you back on the 308 build. It's frustrating to have to re-think things after you've already put time and money into them. Kudos to you for spending the extra time and money to make it perfect instead of settling for mediocre. The look with the mesh is awesome. Can't wait to hear the car run!
You have 6 of the 8 halves have them finish putting together a front and rear rim then more progress can be made with just the 2 wheels. They can send you the other two when the other 2 halves are received.
Slats in the rear would look awesome! Or NACA ducts on the bottom of the car to draw air up through the cooler and routing the exhaust through the mesh up high.. 😁
I agree with your idea of 3 or 4 black horizontal slats that are sort of a rounded trapezoidal shape (perhaps custom carbon fiber), maybe only three quarters of an inch thick and an inch deep running the width of the space making the rear of the car look even lower and wider. Capturing cool air is a bit of an issue perhaps a scoop incorporated in the lower diffuser design ducted up through the cooler then exiting out of the top through the new slats. At speed this is low pressure area and should aid in air flow through the ducts. Then possibly splitting the exhaust into two exiting on either side of the cooler ducting. Just a thought.
Loving this project... I do admit that one of my favourite touches was the older style exposed mounting for oil cooler on the rear,.... but do get your thinking for the new design. Keep it up and get well bud!
I like the cooler change. Think for tailgate a set of Testa’ slats that are adjustable will allow you to tune the vortices in a CFD program to work with your wing and draw and direct heat and dirty flow out. Look forward to the next update 🏴
Oval tip coming through the middle of the mesh with a trim ring, and then a smaller inner oval exhaust for the gate would be amazing. I do like that mesh, maybe even a mesh that has horizontal openings.
If I’m not mistaken, hexagonal mesh covers the least surface area. That coupled with covering the wheel wells could draw air through the side ducting and straight out the back to at least cool the engine bay somewhat. I like the idea of a twin exhaust in the centre of the mesh as well, although I’m not sure if they want to be next to each other or slightly spaced out. The hexagonal mesh will be quite see through as well and you’ll get that “upskirt” shot of the engine bay through there, almost like a Pagani Zonda. I would imagine the easiest solution for drawing air through the cooler would be from the top. Can you get a split cooler so the oil and trans can be cooled in one unit, it would save on ducting?
I think the mesh is nice, might be able to sell the idea by cutting the license plate area and also doing a mesh in that region too. I like it because it is a nod to the F40/F50 rear ends that have a mesh that reveals the engine.
I like the mesh, yes definitely in black, one idea though is to use the mesh piece from the proof of concept with the oil cooler, but instead of a cooler on each side you could do dual tipped exhaust out each side. Reason dual is because it would match the tail lights. On top of that depending on how it's piped it could make it alot easier and leave you alot of room for oil/ trans cooler ducting because the space in the middle isn't being used for the exhaust. Just a idea 😄
I think no matter what you do, some fans will be helpful. Air follows the roof of the car smoothly until that vertical rear window. (search "aerodynamics of pickup trucks") There will be low pressure areas and turbulent flow over the engine cover behind that cabin, so air intake won't smoothly flow into naca ducts on the engine cover, I would doubt you will get proper cooling. Naca ducts on the bottom would do better in my mind, however I think the cosmetic aspect of the intakes on the engine cover would be cool, and they would bring in cold air. A few fans set to temperature switches with the engine cover intakes would do fine though, and help fill the low pressure area behind the car. As for the mesh, get some black stuff with a higher hole-to-metal ratio to make it more transparent, and let it ride until the rest of the car is done. I like the idea of some powder coated black metal slats too, but that adds a couple days of work that isn't needed. I think a center exhaust with a small flange around the point where it passes through the mesh would look great, and the flange would cover up the edges of the mesh, or de tomaso pantera type exhausts coming up from the bottom. Either way, super excited to see this build, and love what you've done with it so far.
i think the mesh would look great with a few things, exhaust cutouts with little accent flanges to beautify the hole edge. Also 3D forming the meshed so the outer edge of mesh is recessed inward toward the body. like 3/4" from how it looks on camera. like a big bead roll around the whole thing. i believe that would look like it's floating in the body, would also give the part added strength, without adding weight. and give you opportunity to hide mounting points
I think horizontal slats with radius ends where they’d return near the sides, would echo the design language of that era of Ferrari, plus you could do centre exhaust tips and radius the ends there too, good for airflow too
I like the idea of the mesh. I think if there was a bit / the entirety of a big diffuser coming up the rear between the two lower yellow pieces it would fill the space nicely! Although it may come into contact with the oil cooler, but there could be a secondary scoop to cool through the bottom!!
The mesh could use some work, the car speaks for its self, maybe something more aggressive! But you are heading in the right direction!!! Keep up the amazing work mike!
Go for a duckt from the bottom and outlet in the back. Would look sick if there are outlets in the back. This car is absolutely a over kill so keep this line! Greetings from Germany 👍🏻
My thought on the oil cooler, if you decide to leave it in that horizontal position, would be to build a diffuser to seal off the underneath that has two NACA ducts feeding cold air to it from underneath. Have a cover above it that curves up and back to the mesh to vent it out. This would help pull air through, and when completed, would provide a more elegant solution to finish off the rear of the car.
Glad to hear you’re feelin better and out and about man. I love the idea of the laser cut slats. I think you can integrate the mesh and the exhaust nicely with that direction. Also, not sure if anyone else- or you- think this, but it might be cool to cut the tiny corner pieces of the bumper off and make the rear end look more minimalistic? Kinda like some well done turbo r8’s with minimal bumpers. Just thought I’d throw that out there. Keep up the great work man, all your builds are incredible quality. Love the channel!
I think if you build like a frame with rectangles and put mesh in the cavities and maybe attach it with some cool bolts to the car (maybe anodyze the whole thing black) and also maybe an ornament around the exhaust exit to make it look super functional. Just an idea. You can probably do that out of aluminium or cad it as you mentioned. Keep thinking, keep being creative and you will start to like it. Don't care too much what other people think. If they get on you ask them about their Kswapped Ferrari
I think your on the right track to making the rear look how you want it 👌 i personally think it will look good wherever you end up, keep up the good work 👍
Always fun going through the iteration steps to improving on a design! As for the ducting for the oil cooler, ideally you'd be using the side ducts as you've stated, but that bay is pretty crowded and I'm worried the amount of bends required to feed the air would cause some significant air losses. The top duct idea is good, as long as you can ascertain that there will be enough airflow hitting the duct opening to provide adequate airflow through the cooler. You'd think there would be, but with the way the roofline is the air may not have enough time to drop down into a top mounted duct at speed when you need the cooling the most. This may not be the case though, without testing it's hard to say. I'd say the bottom intake is probably your best bet, as long as you're running some type of general mesh on the intake to prevent road debris from flying up and taking out your fins. Last thing you want is a sudden loss of oil pressure! Bottom intake should provide you with good, clean cold air regardless of speed.
Aero is everything in time attack - well all track cars 😀, where ever the ducting least affects the wing and diffuser is where it should go. To me that means scrap the whole rear mount idea and put a cooler in each of the ducts Ferrari thoughtfully provided is the rear qtr's and ducting them out wherever RS Future says😄 Will also avoid the massive heat soak bubble that the turbo is going to create at the rear of the car which can now go straight out the mesh like all modern super cars.
@@timmason5230 Yeah that's ideally the best answer. I was just going off the location Mike welded in place, but of course he can always cut the mounts off and move the cooler again if needed. The only issue I'll m seeing with mounting them basically onto the side ducts is the lack of a good mounting location and space restrictions. The rear mount where he has it now shouldn't affect the wing at all, even if he has it fed from the top. Whatever air would get fed into it from the rear deck is too low to affect the airflow around the wing anyway. Bottom fed does affect diffuser performance as you're removing airflow and adding drag to the bottom portion of the car. If I were Mike, I'd mock up all these solutions very roughly in CAD and run a CFD analysis. It's not super hard to do so with a basic 308 model from a model website and then make rough alterations to see what's affecting airflow before I get expensive ducting solutions in place. I get he might not have access to that software though, which is why I keep telling him I'll run simulations for him if he wants!
@@RogueViirus12 if he uses the small coolers, they look like they'd fit into the voids immediately behind the exits of the side-inlet ducts. The issue would be getting them in there and the bracketry needed to hold them there. Then entrance ducting would be easy, and the exit could just be open into the engine bay, which is vented out the back.
For the oil cooler, maybe like a wrx stil hood scoop shaped metal on the bottom to funnel air from bottom to top then a reversed scoop of same shape on top to funnel the air out the back
I believe the deck above the engine is known to be negative pressure on a 308. If so, airflow is from under the car and out the top. Not sure what you're planning to use stock side ducts for; it might be worth the fight to use one (or both) for cooling air. As you know, Ferrari added additional NACA ducts to the 208 and F40 and extra ducts down low on the 288.
I like very much the idea of the black mesh. It's pretty, functional, probably easy to work with if you want to insert anything throw it, and mostly, it should reminds evryone the F40 😉
(it does not need to be exactly the same kind of mesh of course)
I think louvres / slats is the way to go personally. Like you say it will have a more factory look about it . Great episode 👍🏻
As an engineer, I am not in love with the horizontal cooler. Have you considered placing the larger cooler in the middle of the space left by the bumper delete? It seems like that would be the styling you were originally after and provide more functionality without the oddball ducting. Just a thought.
BTW, I love the channel and can’t wait to see the final product.
Did you used to autocross a silver e36 in Texas?
I love the Mesh, I would make it more open like an expanded metal vs a perf plate. It makes the car look soo much lower and wider. Maybe something like the GMA T50 has. Would bring a modern touch to the car. Or something like the F40 with expanded metal and a nice thin trim piece with exposed fastener heads.
nonono. no extruded mesh on this car
@@StanleyKubick1 it's not extruded, It's expanded. Expanded metal came stock on a many Ferraris before and after this car to include the F40. It works great for heat removal.
Something like the f40 but made of carbon would be the tits I think
@@tomc5982 agreed but he stated in a previous episode he doesnt want to make custom carbon parts. If he was closer, I would just come make them for him.
10:20 There probably will be a low pressure zone over the hood of the car and behind it, so getting air in from the side duckts and just pulling it out towards these low pressure zones would probably be the best move. In any case, Fans would probably help.
my vote goes for NSX style snorkle but im a crazy man.
Refreshing seeing you use CAD so much. (Cardboard aided design)
Like you have stated it is what it is. This material shortage or whatever we are calling it affects everything. You are doing what you can and folks just need to deal with it. Great project and video. Thank you!
Keep up the progress. Dont get bogged down on the tiny details, in the end its still a homebrew street car. Having it start/run is vastly more important to the end goal than the philosophy of each bolt.
NACA ducts will work well in the bottom of the floor - also depends on your plans for a diffuser .. lotus uses a few naca ducts in the floor pan to get air into the engine bay ..
I would swap the connections for the oil cooler so that the pump line goes under the bracket and fits to the first fitting to the cooler, then run the second fitting to the return feed of engine to shorten line and not run through any hard surfaces that may cause a future issue, then I would have the air flow ducting come from the top end when the hatch is down to feed the turbulent air into the louvre zone or vented last half of the hatch and maybe have under mesh to protect the area from any debris to the oil cooler, third I could see that you could use the factory inlets of the body to use it for brake cooling instead? I love this project and the 288, 308 have always been my all time favorite Ferrari aside from the iconic F40 coming in at a close second.
KEEP UP THE BEAUTIFUL WORK MIKE
Came here from Donut media, and i have already watched most of this series... Im hooked! Love this!
If you bring the ducting to the top, on the boot lid, and put a "wing" shaped vent, it will create a low pressure zone that will suck the air to the top, which will pull the air from the bottom. I also think the mesh looks "tacky" and louvers would look a lot better, either 3D printed ones, or you could take the front grill from another car, like a MK1 VW golf, and use that, or even just flat bar evenly spaced, because the front grill, the vents above the lights and the vents on the side are all louvers so it would look better to keep it all the same.
I agree front and back the same style. My thoughts were just some larger holes type mesh or printed something. But your idea of a grille/ straight bars I think could look great as well.
I had a similair idea. Also, since hot air wants to rise, the ducting orientation like this will have less flow resistance. Yes, when driving that won`t matter much but when idling or/and when driving slow it will work against each other rather than it compliments each other.
I like the idea of drawing the air up, however since an exhaust will presumably sit right below it do you think it'll draw the hot air from the exhaust? then again I'm sure some sort of exhaust wrap could help alleviate that as an issue. also you can never go wrong with louvers!
@@Bugalona well there is going to be heat from the engine and exhaust either way. Maybe adding little "scoops" on either side, just below the bumpers behind the back wheels could help suck fresh air in. Also if your ducting is going from bottom to top, you can put fans in the ducts to stuck air though when the thermostat clicks on.
With the rear mesh - stick with the F40 theme. Open, and exposed as possible. Form follows function here in my opinion. Love your work!
Came here after watching a donut media video about swappped cars yesterday, and been binch watching the whole series in one go! Awesome content and great balans between explaining and working on the car. Keep it up!
Thanks for doing your part and quarantining...If more people were as considerate as you, this issue would have been squashed a long time ago!
Like the mesh, I agree, I think it'll look a lot better in black.
Cooling - Make composite tubes that snake their way there, around and through whatever. Can be done in as many slip-fit pieces as necessary, and can change shape, and bend any conceivable amount. Super light, won’t corrode, and there are relatively inexpensive methods to achieve it.
maybe you can build a diffuser that comes all the way up to where the top of the mesh is rn. Im really hoping for some wild aero on this car, as long as it's functional. I love this build, I own a miata, and it's hard to be unique with that car. You've inspired me to try something unique, I want to put a miata drivetrain in an old DAF66 (I'm Dutch, hence the DAF).
Bro this is my favorite channel to watch on TH-cam thank you for doing the work to make it happen🙏
About the mesh, imo if you made it with bent edges, like a very shallow and long rectangular box, it would probably look better, as the edges will have a tiny curvature rather than terminating immediately, possibly matching the car's curves better and looking more refined as well. This will allow for cleaner mounting too, you wouldn't need tabs but rather would use the bent edges to mount the mesh on the bumper.
The project is nearing completion, can't wait to see how it drives and performs etc, it will be epic.
and im done BingeWatching all episodes on the Ferrari. well done im jealous of your metal skills!
If you're gonna have a diffuser underneath the car I'd suggest ducting air from under the car, through the oil cooler, and out the mesh area you have. All you'd have to do is cut out a spot in the diffuser and maybe throw a mesh underneath the cooler to protect from rocks.
Behind the car is where theres the lowest pressure so if you have a diffuser which is designed to create a high pressure zone under the car it'll suck that shit right through your oil cooler.
Someone should definitely confirm though I'm a mechanical engineer but fluids was not my best class
Love the build by the way I can't wait to see the finished product! You're doing great work dude
Whoever is making your wheels should make them with exactly the specs you ordered. That's one of the reasons why custom built wheels are so expensive. BTW, love this build. 308's are one of my all time favorite cars (looks wise anyway).
Just a couple questions that came to mind listening to the concerns of wheel variables in the last segment. While I completely dig the idea of having the exact wheel you want on this car, it is a car that you plan to run on track. That said, with them essentially being a one off modified wheel, what happens if you go off track and damage one? Are they something that can be easily replaced? I have no doubt its been thought of, but would it not have been easier to take the chosen design to a wheel company and have a new set made to your specs versus modifying an original set?
Great project though and I, like many others for sure, am looking forward to seeing the finished product. This entire series has been awesome and its great to see someone show the minute details that go into builds like this.
Mesh looks good. You can't tell yet until you do the lower rear valance and see how that comes together. Concept is good! Right direction for sure.
Really loved your original cooler location.
That said I prefer the larger cooler, it will help a lot.
I have concerns using NACA ducts in the engine lid area as it is likely a negative pressure location and will now likely suck air out, no matter what you do.
I suggest then the input is below, meaning the output is then more likely better in the rear, near the license plate OR your new rear grill.
Surely the cooler should sit upright behind your mesh panel?! Then duct from under and in front of your diffuser, through the cooler and out the mesh!
I also think you need to consider your exhaust path before finalizing this!
Cheers.
I like the slat idea vs the mesh at the rear of the car.
When you showed the mesh, I instantly thought of doing slats instead. 3-5 slats, maybe 0.5” thick, rounded over edges.
Thanks for being responsible Mike 👍
In the end it is your car, but since you asked :) , I would go with hexagonal 3 piece mesh. single piece always makes it looks cheap. Having multi parts gives thsose multiple reflections.
another idea I had when I first looked at the back aend was 2 larger radiators on boths sides with a gap in between where you fit an F1 style brake light. you will still need black mesh over it to tidy it up but you should thing about the wing mounts etc as well as they will all be one at the end.
I think it is turning out gorgeous.
The mesh in black is going to look awesome. Put an LED rain light in the middle to break it up a little and I reckon you're golden
I like the idea of the slats over the mesh.
I'm not an engineer of speed and aeromatics so testing may be required on your end to see where negative pressure exists. 💡 Idea#1 If the negative pressure is at the top of the engine cover you could have the pickup under the car facing forward. Air would travel along the bottom of the car into the duct through the cooler and out the cover. 💡 Idea #2 If there is more negative at the rear of the car then the intake would be in the cover(testing would be required to see If a scoop would be required) and the exit would be below facing rearward allowing the air to be pulled through instead of pushed. Less bends and more direct either way. I'm sure whatever you come up with will be cool 😎. I came for the model A, but this 308 is gonna be 🔥. 🍻
I like the slats idea. I think painting it black will help picture it.
Maybe draw it up and play with exhaust exit and style that you want and then work your coolers around what you want it to look like. Might even wind up with room to set the coolers vertically and help with airflow.
Laser cut aluminum slats. Use multiple pieces to create 3D geometry from 2D cut aluminum pcs. Paint black.
Dang, I loved the look of how you had it planned, looked like they belonged there, I understand why you changed it but it looked so good!!!
I think the idea of having a laser cut piece with slats or some sort of venting is a great idea.
Scrap the mesh that looks like chicken wire 🐔.
It's a Ferrari for God's sake! LOL
Always look forward to your video content.
Keep up the good work...
He said twice that it's meant to test and that he's not using that for the final product
I agree, even painted black it would detract from how awesome this is shaping up to be, shame the oil coolers idea didn’t work, but sensible to change that
First of all thank you for the shoutout and for laying down the challenge to offer some input :) I think your answer could come from Ferrari themselves to address two issues. The rear mesh does not look right. The shape of the 308 really needs a that trim euro bumper as you will have in the front to get the aesthetics right. Also I think the oil cooler could be in a better place.
To that end I urge you to Google images 'Ferrari 208 Turbo Rear'. In the European model Ferrari 208 Turbo (2 liter displacement rather than 3 liters because of tax laws) uses a split rear bumper with a mesh piece in the middle. This keeps the clean Pininfarina styling but offers an opportunity to vent the oil cooler which I would look at mounting vertically similar to how you had the small coolers on either side. If you set the cooler nice and far back and vertical in this area I can't see how you will be compromised for space as it will still allow the exhaust to be vented through the rear panel (not my choice) or into the diffuser which I much prefer. Google images 'stefan johansen monaco ferrari' and you'll know where the inspiration came from :)
As for how to feed the oil cooler I think you are too far from the side scoops to do anything meaningful with them. NACA ducts on the surface of the rear lid could work very well and look cool too. Another option is putting them in the upper rear quarters behind the wheels but I'm not so sure of the look of that. For inspiration search for images of rear differential coolers on Trans Am race cars because this is an issue they deal with all the time. This might send you down the path of just fitting an electric fan to the cooler if ducting is a problem. Either way that path of research will really open your eyes to what is possible.
I hope this helps and best of luck with future progress. I'll be following eagerly.
NACA ducts on the rear deck would likely compromise the airflow for the rear wing. As an alternative, the bottom of p2 and top of p3 of the following link shows how Pratt & Miller handled ducting for the rearmount radiator/transcooler on the C7R. You've got an engine in the way so you can't use the exact same routing, but you don't need as much air either. I think you could probably get away with the side scoops if you ran flex ducting to both of them into a joint plenum (or a split plenum) on the face of the oil cooler and dual puller fans on the back side so that you're ensuring airflow. But that may also require rotating the oil cooler out of the horizontal... motoiq.com/nerds-eye-view-chevrolet-corvette-c7-r/2/
if the wheel lips are the wrong offset then you have 2 options ...... leepu spacers or trailer arches PMSL. Great update Mike I think NACA ducts will work if the area above is high pressure area. you might need scoops on the ducts to peal out into the airflow above if there isnt the flow or pressure present directly above them tho, need to get someone to run some models in ansys for you. Or just do what I do and guess !
I think a NACA duct on the belly pan will be a good idea. You could exhaust the hot air outside the mesh grille along with everything else. It can definitely help with your low pressure zone behind the car to keep airflow attached which could reduce drag.
Just binged the series in a week! I'm officially caught up, but now I gotta wait!
always happy to see an episode out and always looking foqward to the next one
Pop those oil coolers in the naca ducts and do long slats in the rear .
For the rear panel how about dimpledieing it? Echo the tail lights. Holes can have mesh behind them if you don’t want to leave them open.
Stopped halfway through this video to google the mesh at the back of an F40. That mesh isn’t slick and fancy. It’s basic but very very neat. F40 at its core is a race car so the mesh is race car appropriate. Excited to see what you end up doing.
Mike,
you're looking much better, take care!
Enjoying the videos. Recovered from Covid in August of last year. Look forward to more content.
I definitely like the idea of black horizontal slats instead of the mesh.
Just to give another possible way of accomplishing your airflow to the oil cooler ... Look at the Ferrari 288 Evolutzioni rear naca ducts over each of the rear portions of the rear wheel arches. You might find something that suites your needs there. Their reason for air intake at that location served similar need for airflow to and through that area as well. Mesh is classic, Aluminum fins could be a signature part of your design though... Great possibilities there. Love this project. Thank you.
For the cooler asit is now you will have a high pressure low temp zone under and a low pressure above so that should be fine could allways add a fan later if necessary. With the exhaust come out in the centre of the mesh for a straight pipe
You are doing amazing work! The thing that always worried me about placing the coolers in the rear corner bumper locations was that it's a significant high-pressure area until you get to pretty high speeds on a car with Kammback / sharp cutoff rear like the 308. In other words, depending on the local shape, at speeds up to 60 or so, air down in that area is trying to get into the engine bay rather than vice-versa. Intuitively it seems like air should get sucked out of the engine bay by airflow there, but it's the opposite until you get going quite fast. Looking at what you are doing now, I wonder if your fresh air source for the horizontally mounted cooler is actually the openings vacated by smaller corner coolers you just removed. In other words, you probably have a nice, high-pressure source of fresh air behind the car, sucked in through those corner bumper mesh inlets, duct the air into the top of the horizontal cooler, and then exit down into the faster air (low pressure) flowing under the back of the car. If you end up putting in a diffuser, all the better. That would scavenge air down through the cooler and out the back even better if it exits into the diffuser airstream.
^This. The top of the engine cover may also be higher pressure due to the sharp corner where the roof ends, some CFD or wind tuft testing may be worthwhile to confirm. Exiting into the diffuser/underbody though is definitely the way to go.
Might be worth adding a stay/support to the oil cooler on the opposite side of the current mounts. When its full of oil, that cooler will be quite heavy and will act like a lever on the current mounts, possibly fatiguing the welds over time due to vibration.
You do NOT want the cooler's airflow to exit into the diffuser, especially if it's going to have to make a 90-degree change in direction. The diffuser needs laminar flow to work, and dumping a bunch of turbulent post-cooler air into the middle of the curve or behind it (given the current positioning) will wreak havoc on the flow. If it exits into the no-man's land *above* the diffuser and exits out the back of that area (between the top edge of the diffuser exit and the bottom edge of the bodywork where the bumper used to be) that might work out OK.
@@jsquared1013 if you ran a duct from cooler into diffuser, but curved so that it aligned with diffuser airflow, it could act as venturi to draw air through the cooler… sizing might be critical - not sure how much that might interfere with diffuser airflow. Not sure how well this translates, but this concept is how dust aspirators work on certain ag and construction vehicles - venturi pipe in exhaust draws dust out of aspirator on air intake…
To cool the oil cooler, I would put naca ducts into the diffuser to draw fast moving high energy air from under the car, I would also do dual exhaust tips on the outer edges of said naca ducts to keep flow attached throughout the diffuser, especially at it's most aggressive or curved section.
Totally understand the wheel situation, love the mesh, under the assumption it would be black in its final form, and would personally draw air from the bottom of the radiator and use the mesh as an exhaust. The mesh will also help manage some of the engine bay temps as the cool air drawn in from above through the engine bay hatch will be able to exit through the mesh in the back creating a vacuum that will draw (probably) most of the radiant heat away from the engine and other components. Another reason to keep the side air vents clear as it will create a clear path for all the air to follow from the front of the engine bay to the back of the car.
The slats on the engine cover are vents for when the car is slow or stationary, they are not inlets. The airflow behind the rear window is super turbulent.
I've just finished binge-watching the series, after hearing about it on Donut Media the other day. Awesome build, crazy to see how far its come. Makes me want to turn wrenches.
Horizontal slats for sure. I think if you did the slats you could color match the panel to the final color too and the void in the slats would be black enough to give a nod to the “black accent” you were looking for.
Make the slats for the rear the same way the gas filler cap door by the window is, It would really compliment each other,
Discovered your channel only a few days ago and have almost cought up on the ferrari build. Keep it up. Great production quality on the videos and great tips/tricks. Just awesome.
scoop the air from a naca duct in the flat floor to the cooler and exit out the below and behind the wing.
I think some Testarossa style slats would fill that space below the taillights really well vs. the mesh
Nice to see you back on the 308 build. It's frustrating to have to re-think things after you've already put time and money into them. Kudos to you for spending the extra time and money to make it perfect instead of settling for mediocre. The look with the mesh is awesome. Can't wait to hear the car run!
Mesh is solid, my first through was black as well. It may need something to break it up a bit like you mentioned.
You have 6 of the 8 halves have them finish putting together a front and rear rim then more progress can be made with just the 2 wheels. They can send you the other two when the other 2 halves are received.
I was thinking slats as well even before you said it. Black slats is my choice.
I would most def go with the slat style vents in the back and elsewhere. It will give a more stylish factory look.
Laser cut slats! Definitely 👌
Love this build. Always an inspiration to get me into the shop rather than thinking about getting into the shop :)
I live these wheels on the car. These are the ones you should go with.
Slats in the rear would look awesome! Or NACA ducts on the bottom of the car to draw air up through the cooler and routing the exhaust through the mesh up high.. 😁
I agree with your idea of 3 or 4 black horizontal slats that are sort of a rounded trapezoidal shape (perhaps custom carbon fiber), maybe only three quarters of an inch thick and an inch deep running the width of the space making the rear of the car look even lower and wider. Capturing cool air is a bit of an issue perhaps a scoop incorporated in the lower diffuser design ducted up through the cooler then exiting out of the top through the new slats. At speed this is low pressure area and should aid in air flow through the ducts. Then possibly splitting the exhaust into two exiting on either side of the cooler ducting. Just a thought.
Loving this project... I do admit that one of my favourite touches was the older style exposed mounting for oil cooler on the rear,.... but do get your thinking for the new design.
Keep it up and get well bud!
Duct in from the top and vent to the bottom . A flat floor with front and rear floor aero 👍
I like the cooler change. Think for tailgate a set of Testa’ slats that are adjustable will allow you to tune the vortices in a CFD program to work with your wing and draw and direct heat and dirty flow out. Look forward to the next update 🏴
Really enjoying the evolution. Always fun to see clips from previous episodes to see how far you have come.
I like the oil cooler set up that was using the gap under the taillights. I would have used Banjo Fittings to have more adjustability for the hoses.
Oval tip coming through the middle of the mesh with a trim ring, and then a smaller inner oval exhaust for the gate would be amazing. I do like that mesh, maybe even a mesh that has horizontal openings.
Those bumper coolers are siiiiick 👌
10 day quarantine, I thought it was 5 days now! lol - Glad you are feeling better and thank you for continuing to create content!
IIRC the 5 days is for asymptomatic cases, if you're symptomatic it's still 10.
Thanks for the content Mike I like the slats idea on the rear ,and the fact it will all happen when it does.
If I’m not mistaken, hexagonal mesh covers the least surface area. That coupled with covering the wheel wells could draw air through the side ducting and straight out the back to at least cool the engine bay somewhat. I like the idea of a twin exhaust in the centre of the mesh as well, although I’m not sure if they want to be next to each other or slightly spaced out. The hexagonal mesh will be quite see through as well and you’ll get that “upskirt” shot of the engine bay through there, almost like a Pagani Zonda. I would imagine the easiest solution for drawing air through the cooler would be from the top. Can you get a split cooler so the oil and trans can be cooled in one unit, it would save on ducting?
I think the mesh is nice, might be able to sell the idea by cutting the license plate area and also doing a mesh in that region too. I like it because it is a nod to the F40/F50 rear ends that have a mesh that reveals the engine.
I like the mesh. Nice nod to the Ferrari 355/360 Challenge cars.
I like the mesh, yes definitely in black, one idea though is to use the mesh piece from the proof of concept with the oil cooler, but instead of a cooler on each side you could do dual tipped exhaust out each side. Reason dual is because it would match the tail lights. On top of that depending on how it's piped it could make it alot easier and leave you alot of room for oil/ trans cooler ducting because the space in the middle isn't being used for the exhaust. Just a idea 😄
Yeah. Run slats or louvres for the rear bumper. That would be cooler in both senses of the word.
I think no matter what you do, some fans will be helpful. Air follows the roof of the car smoothly until that vertical rear window. (search "aerodynamics of pickup trucks") There will be low pressure areas and turbulent flow over the engine cover behind that cabin, so air intake won't smoothly flow into naca ducts on the engine cover, I would doubt you will get proper cooling. Naca ducts on the bottom would do better in my mind, however I think the cosmetic aspect of the intakes on the engine cover would be cool, and they would bring in cold air. A few fans set to temperature switches with the engine cover intakes would do fine though, and help fill the low pressure area behind the car.
As for the mesh, get some black stuff with a higher hole-to-metal ratio to make it more transparent, and let it ride until the rest of the car is done. I like the idea of some powder coated black metal slats too, but that adds a couple days of work that isn't needed. I think a center exhaust with a small flange around the point where it passes through the mesh would look great, and the flange would cover up the edges of the mesh, or de tomaso pantera type exhausts coming up from the bottom.
Either way, super excited to see this build, and love what you've done with it so far.
So happy to see 308 content again!
Keep it up buddy!
i think the mesh would look great with a few things, exhaust cutouts with little accent flanges to beautify the hole edge. Also 3D forming the meshed so the outer edge of mesh is recessed inward toward the body. like 3/4" from how it looks on camera. like a big bead roll around the whole thing. i believe that would look like it's floating in the body, would also give the part added strength, without adding weight. and give you opportunity to hide mounting points
I think horizontal slats with radius ends where they’d return near the sides, would echo the design language of that era of Ferrari, plus you could do centre exhaust tips and radius the ends there too, good for airflow too
way better with the mesh! I'd say black or a dark gray
I like the idea of the mesh. I think if there was a bit / the entirety of a big diffuser coming up the rear between the two lower yellow pieces it would fill the space nicely! Although it may come into contact with the oil cooler, but there could be a secondary scoop to cool through the bottom!!
i dig the mesh, something cool might be having the Stanceworks logo in the middle with dual exhausts on each side.
The mesh could use some work, the car speaks for its self, maybe something more aggressive! But you are heading in the right direction!!! Keep up the amazing work mike!
Go for a duckt from the bottom and outlet in the back. Would look sick if there are outlets in the back.
This car is absolutely a over kill so keep this line!
Greetings from Germany 👍🏻
My thought on the oil cooler, if you decide to leave it in that horizontal position, would be to build a diffuser to seal off the underneath that has two NACA ducts feeding cold air to it from underneath. Have a cover above it that curves up and back to the mesh to vent it out. This would help pull air through, and when completed, would provide a more elegant solution to finish off the rear of the car.
Glad to hear you’re feelin better and out and about man.
I love the idea of the laser cut slats. I think you can integrate the mesh and the exhaust nicely with that direction.
Also, not sure if anyone else- or you- think this, but it might be cool to cut the tiny corner pieces of the bumper off and make the rear end look more minimalistic? Kinda like some well done turbo r8’s with minimal bumpers. Just thought I’d throw that out there. Keep up the great work man, all your builds are incredible quality. Love the channel!
I think if you build like a frame with rectangles and put mesh in the cavities and maybe attach it with some cool bolts to the car (maybe anodyze the whole thing black) and also maybe an ornament around the exhaust exit to make it look super functional.
Just an idea. You can probably do that out of aluminium or cad it as you mentioned.
Keep thinking, keep being creative and you will start to like it. Don't care too much what other people think. If they get on you ask them about their Kswapped Ferrari
I think your on the right track to making the rear look how you want it 👌 i personally think it will look good wherever you end up, keep up the good work 👍
The mesh would definitely look great in black.
Always fun going through the iteration steps to improving on a design!
As for the ducting for the oil cooler, ideally you'd be using the side ducts as you've stated, but that bay is pretty crowded and I'm worried the amount of bends required to feed the air would cause some significant air losses. The top duct idea is good, as long as you can ascertain that there will be enough airflow hitting the duct opening to provide adequate airflow through the cooler. You'd think there would be, but with the way the roofline is the air may not have enough time to drop down into a top mounted duct at speed when you need the cooling the most. This may not be the case though, without testing it's hard to say.
I'd say the bottom intake is probably your best bet, as long as you're running some type of general mesh on the intake to prevent road debris from flying up and taking out your fins. Last thing you want is a sudden loss of oil pressure! Bottom intake should provide you with good, clean cold air regardless of speed.
Aero is everything in time attack - well all track cars 😀, where ever the ducting least affects the wing and diffuser is where it should go. To me that means scrap the whole rear mount idea and put a cooler in each of the ducts Ferrari thoughtfully provided is the rear qtr's and ducting them out wherever RS Future says😄
Will also avoid the massive heat soak bubble that the turbo is going to create at the rear of the car which can now go straight out the mesh like all modern super cars.
@@timmason5230 Yeah that's ideally the best answer. I was just going off the location Mike welded in place, but of course he can always cut the mounts off and move the cooler again if needed.
The only issue I'll m seeing with mounting them basically onto the side ducts is the lack of a good mounting location and space restrictions.
The rear mount where he has it now shouldn't affect the wing at all, even if he has it fed from the top. Whatever air would get fed into it from the rear deck is too low to affect the airflow around the wing anyway. Bottom fed does affect diffuser performance as you're removing airflow and adding drag to the bottom portion of the car.
If I were Mike, I'd mock up all these solutions very roughly in CAD and run a CFD analysis. It's not super hard to do so with a basic 308 model from a model website and then make rough alterations to see what's affecting airflow before I get expensive ducting solutions in place. I get he might not have access to that software though, which is why I keep telling him I'll run simulations for him if he wants!
@@RogueViirus12 if he uses the small coolers, they look like they'd fit into the voids immediately behind the exits of the side-inlet ducts. The issue would be getting them in there and the bracketry needed to hold them there. Then entrance ducting would be easy, and the exit could just be open into the engine bay, which is vented out the back.
For the oil cooler, maybe like a wrx stil hood scoop shaped metal on the bottom to funnel air from bottom to top then a reversed scoop of same shape on top to funnel the air out the back
I believe the deck above the engine is known to be negative pressure on a 308. If so, airflow is from under the car and out the top. Not sure what you're planning to use stock side ducts for; it might be worth the fight to use one (or both) for cooling air. As you know, Ferrari added additional NACA ducts to the 208 and F40 and extra ducts down low on the 288.
For the rear, have a look at Phill Morison's, from Driftworks, Lamborghini. Full build is on TH-cam.