As I said in the previous video, adding the GSL-SE later opening and closing exhaust ports, alters the resonance for the VDI. The Renesis VDI is designed to work with a zero overlap intake. You now have overlap. The overlap is effecting the intake pulse bouncback from the front to rear intake charge. Try changing the rpms that the VDI opens and have it open later in the rpm to fix your mid range.
You did all the porting and exhaust I thought I wanted for my rx8. Thanks for all the $ you've saved me so far. Nice to see you macro on the work done delaying for longer episode
I think you should continue trying to figure out how to optimize an NA hybrid Renesis, but don't block off all side exhaust ports. Doing that would essentially just give you a better S5 RX-7, which isn't anything new. 200 whp is very doable with a good compression stock Renesis so there must be something you're missing in this build. If it really does feel like it might be 150 hp, that's way more than the 100ish you dynod. I'd really like to see you dyno but just keep experimenting you're already making incredible progress. Love the videos
The SSV is not helping the brap, try to lock it open and see how it sounds, also the secondary inserts. Keep in mind mazda tried to get the most power out of the renesis without overlap for emissions you know this
The REASON they were able to get the most NA power was because of no overlap. they had been trying to do side port exhaust since at least ~1975, but had to stop development because of the oil crisis, then they started again in the late 80's. NA power is almost entirely because of the no overlap, and added benefit is lower emissions.
@connervinyard6476 Yeah, but it has no turbocharging efficiency. If the renesis had at least some wiggle room for modification, it would be the staple in rotary racing, unfortunately the renesis was MADE to be N/A and N/A only, we as the consumer have to take it upon ourselves to find a way to make them useful in our desired purpose. Especially with increasing prices on older engines
@@jimbowcracklehead8071 not everyone wants a turbo for various reasons. Street driving is not racing. Reliability better for N/A all else being identical. What are N/A 13Bs that idle well and drive smooth and have an semi-quiet exhaust get to the wheels? Just trying to help you realize what the Renesis is great for ... may not be applicable to you, but it doesn't make it irrelevant.
@zakuraayame5091 I love renesis engines for their smooth power bands, it's perfect for resto mods and street cruising with a peppy 150whp without the horrible low end. Me and the other guy were stating how renesis engines are shit with boost, compared to conventional rotaries. Also nobody wants a slug for a car no matter how great it is in corners, boost is almost certainly needed to be able to compete with other cars in it's class.
I thought the whole point of the five exhaust ports was to turbo it. It would be an interesting video if it actually works in favor and gets more than a turbo version of the 2 or 3 port versions. Great videos either way it is why I am tearing apart my fc3s engine's and rebuilding them. Thanks, and keep it up! BRAPP BRAPP 4 LIFE!
I see the same problems on every type of NA Renesis build, and the one thing for whatever reason people refuse to touch, is the Intake Manifold. The whole system needs to be lopped off, and replaced with medium length runners, and ITBs encased in a well designed plenum, then sing it to 10,000+. That low/midrange power is going to have to be sacrificed to make real gains.
We GOTTA turbo the Hybrid before we turbo the Renesis so that we can finish up the Hybrid series with a direct comparison to the stock Renesis and then a turbo Renesis
I believe you need to completely block of the centre exhaust port at the flange, as it alters scavenging between the 2 rotors, rew's don't have this. Also lock tumblers open, or remove them completely from the intake manifold, and minimise all restrictions, free flowing intake. I believe these things will fix it in na. Turbo use all exhaust ports, remove all restrictions from intake.
Is the engine operating in closed loop until 5500 rpm? If so, go to ''load limit unk'' overwrite all values not 0 to 0.75 and go to ''closed loop air fuel additive 1'' and copy the load=0.9375 row values (all the same) to the rows above including load=0.75 row. This will let you go to open loop fueling instantly when load goes above 75% at any rpm.
I would be really curious if you can ever get your hands on a Pettit supercharger... or a frankensteined Procharger. More intake flow to match the added exhaust capacity without putting anything "in the way". Also machining the rotor tips for 2mm apex seals. Very interesting series of videos!
I’m glad he’s doing all of this, thanks rad!!. Because I did taller apex groves and waiting to send it out to be balance. what is holding me back from putting my motor together is which center iron should I go with because of the exhaust turbulence, because I have a gsl-seI center iron.also made a custom mounting bracket for a rotrex c30-94. supercharger. Also on a versatuner, knowing that I will have to go full standalone. Wish I could stay with the versatuner.
@@xSc0oByDo0RaCeRx I just watched Rob Dahm and Mike from MotoIQ discussing rotary engines and one of the reasons we don't usually see supercharged Wankels is that the belt load on the e-shaft causes wobbling and increased flexing. This issue can be dealt with by adding a contact bearing (ball or double roller) close to the snout for added durability, but it's a pretty involved job. I suggest giving that video a watch, it's an hour long and loaded with info not commonly shared.
I believe leaving the SSV and VDI working might be making a lot of turbulence problems. I would try to do a run with the APV working (the rest disabled).
I vote turbo. Thats the real potential of this combo. It'll likely need the rew apex seals though to survive. Love the video and thanks for all the great information.
Now we're talking! You've come so far, but you owe it to the channel to continue the learning experience. As many people have said since the beginning, the MSP exhaust is absolute trash. It's already well established that bridgeport renesis don't make power, so why would adding peripheral ports and thus destroying exhaust velocity make that equation any better? By restricting the MSP exhaust you are now starting to see what we were talking about. While restricting them and essentially creating a Helmholtz chamber for the Siamese port is a step in the right direction they are still having an negative impact. Plus, once you ditch the side ports you can start to rely on existing information on exhaust optimization which should make the "tuning" ( and fabrication/ installation) component that much easier. AND you can save that hybrid flange for your eventual turbo build. #WinWin -- You have the airflow for 200 whp, now it's just a matter of improving the other side of the pump. I have confidence you can boldly go where no one (who is brave enough to document it) has gone before!
You need to build a long runner manifold that separates the Rx7 ports completely from the side ports as far back as you can in the exhaust path. Similar to how old school straight 6 engines used two pairings of manifolds and runners to the back sections of the exhaust
Don't worry too much about the amount of exhaust flow, back pressure isn't required and it's definitely detrimental, turbulence could be an issue but it's happening relatively far away from the engine
i wonder of you were to collect side ports between the chambers. example. Front port of the front chamber is collected with the front port of the rear chamber, rear port of the front chamber with the rear port of the rear chamber. using the side ports to scavenge each other before being collected in with the peripheral ports. also, the whole intake system would need a complete overhaul to make this work right.
It seems that the n/a engine loses even more hp than being OEM, I thought that hybrid engine would work in n/a. Thank you very much for trying until the end
It sounded so good up top in the higher rpms!!! Keep tuning it using your Butt Dyno!! & Shelve this Hybrid project so that you can start on your new car. To Turbo it, will take you longer to have a completed running car. It makes more sense to take your time with the NA work. You’ll get more views with na.
Have you considered putting cutouts on it? You could play around with flow and figure out what works best for the header. In case it isn’t obvious, run the cutout to a blockoff instead of open like they would normally be used.
I think it would be neat to see the merges changed so it's in pairs that scavenge each other, smaller primary tubing if possible. I think having the siamese port blocked off was the right call, maybe cut the center tube really short and re-cap it so less flow tries to go in there.
I’d like to see renesis boosted was thinking of actually picking up an rx8 this week still debating on what I should do engine wise I always here and read about shouldn’t boost renesis so I’m curious what your thoughts would be love these videos bro really learning here thanks for that
I like what you did experimenting only the middle port though. I think you can get close to 200 with an updated tune taking it to the Dyno. I wonder with those tubes being long though if that is sending turbulence around the capped tubes and back at the rotor adding unneeded turbulence? I do like seeing all of these test and glad someone is doing them but the hybrid was built for boost and seems like it needs it for any real power gains.
I'd bet that the intake valves are the main issue here. I wonder what ITBs could make this thing do, or at the very least altering the intake valve opening
I’d like to see this on the dyno as it is with the MSP ports blocked, and try optimise the tune to see the results. Then, add a turbo and try again with the 5 exhaust ports.
I think the only solution if your gonna run it na, you would have to run a periphial port for intake the intake to even out the amount of air flow the main issue would be the intake manifold.. I say just boost it and the increased airflow would be the best solution and be easier as far as fabrication goes
@Rad Potential Would really love to hear your thoughts on whether or not it's possible to put a 20B shaft into a Renesis and make a Renesis three rotor. (And then make a 6 - 3 - 1 turbo header for it.)
Run a twin scroll off the outer two, then the inner two. Block the middle at the flange. Make them short runners. Fuel rail. You could make better power
I think I know what the problem is with such lean gasoline, Rob Dahm explains it in this video at minute 25:00, but basically ¿overlap? What I understood is that a large part of the gasoline is leaking into the exhaust. the video im talking about. th-cam.com/video/p8u0e6ZSQMI/w-d-xo.html
Next step make it turbo. Could 2 exhaust manifolds be used? one Rx7 directly to the turbo and one Rx8 without going through the turbo, even blocking the central port to make everything cheaper
You should have the factory R.X.8 exhaust ports run all the way back to the muffler in their own pipe and not RX7 ports.Run all the way back to the muffler in their separate pipe maybe??? I don't know , this is a really cool Project i'm enjoying your progress
Realize you're going to turbo it, but maybe use a different free flowing intake. The stock rx-8 intake is restricted and is a street intake. If you want real flow you need something that's got bigger runners to match the flow out the exhaust.
Keep the flange, taper the extracted primary’s to exactly the same as the inlet total surface area, keep the scavenge lengths the same, even if it is a 7/8” inch 5 into 1
Needs nitrous peripheral intake ports with the renesis bridged 6 ports and a full renesis performance exhaust and a rx7 full race exhaust xed together b4 rear cans full renesis 50m ida intake and rx7 full 50mida intake dyno tuneing time. ????????????? turbo?????? Aswell????? Just a thought ...... 13b
I thought the purpose of the hybrid is for a turbo system not na. Kyle Mohan uses it for that reason it seems for better flow then a rew. Na just doesn't make sense with such high exhaust flow. I don't know his set up but they make a manifold flange for 5 ports for a reason. Don't waste your time with na. Go turbo with 5 ports.
In 1984 I bought a 13b from a company called rotary engineering. It dynoed at 227 horsepower. It had twin Weber two barrel carburetors and the header. I ran it in both an REPU and a 1980 RX7. It was not a Bridgeport, a 6-port or anything fancy, but it made $227 horsepower. Why is this no longer possible?
Something definitely seems off with the way it picks up. Have you checked the solenoids are connected correctly on the back of the upper intake, or checked whether one is faulty? APV/SSV etc
Why not use the middle or side ports for a wastegate when you turbo it ? it will be the most effective way for wg in my opinion. Keep up the good work dude!
I think your going about this the wrong way. Iv gotten 300whp from a 13b a few times for what it's worth. I think a gslse center plate or better 12a would've been the best move. That being said without taring it down one could shove some exhaust putty in that center port and weld the flange so it can't move then open the front and rear ports back up. The timing is good and the extra port area is worth it now the header really needs some fixing the primary size for the rx7 ports is fine we actually taper to it from 2in in my personal 320whp car but then use 1in for the renny ports with a nice smooth transition and keep in mind when wanting to take shortcuts that falling down the steps is easy than falling up them ie if it catches your finger going in it can help but if it catches your finger going out it will hurt a lot. Look into anti reversion rings ppl use on rx7s. The trick is gonna be gas speed pulling fresh mixture in. I'd move from this point to carbs and a simple intake manifold something homemade that we can change the length on easy without killing ourselves. It's gonna need some slip joints in both the exhaust and intake for Dyno day. Your gonna wanna play with the length on the Dyno and the street and know that whatever you settle on will be better when you cut the pieces and weld it solid. Now I understand that's not easy in the rx8 and changing the intake manifold isn't exactly a simple mater with the ECU. So I say standalone even a cheap dropbear would be perfect as we both know your not going carbie 😂. It's gonna be a lot of tuning time on the runners but I do think you could have a better powerband with more power with the hybrid but I think much like everyone making good na power your gonna have a lot of time in tuning these things. I do think the rx8 manifold is killing you here along with the communication between the center exhaust port at the iron level not even as far as the flange. I think it's doing intake while exhaust pressure is present from the other side and she's eating some of her own shit lf you will.
How come you didn't start with the 6 port engine? The 4 port makes less power than the 6 already and if the exhaust side is the same they're simply not breathing enough anyway. Adding more exhaust like this hybrid won't do it any good. I know plan is to turbo it. But I feel 6 port na then hybrid that then mess around with the exhaust and unfortunately tune every single ssv position across all rpm ans that's when hunting down some power might give some results. Big mission anyway but I absolutely love your videos man you're doing fricking great 🔥🔥
CAN WE SEE ANOTHER RX8 ON ERNIES DYNO?? I feel like it’s a heartbreaker dyno. I’ve seen a ton of dyno sheets with streetport renesis making 200whp. If a streetport renesis only makes 170-175 on his dyno well then your numbers will always be depressing.
My Turbo2 engine in the Radx7 made 336 at 14lbs which is pretty much on point I would think for the size of the turbo. I can get another car out there and do a more "control run" when I go for the turbo stuff.
Waste of time to dyno I think. I believe if we've learned anything from this it's that the Renesis isn't the restricted nightmare the intertubes say it is. I'm still a rotary newbie since I've only owned a bone stock 2009 RX-8 for 4 years but I've figured out the rotary community has a massive amount of folklore and myth.
It sounded so good up top in the higher rpms!!! Keep tuning it using your Butt Dyno!! & Shelve this Hybrid project so that you can start on your new car. To Turbo it, will take you longer to have a completed running car. It makes more sense to take your time with the NA work. You’ll get more views with na.
As I said in the previous video, adding the GSL-SE later opening and closing exhaust ports, alters the resonance for the VDI. The Renesis VDI is designed to work with a zero overlap intake. You now have overlap. The overlap is effecting the intake pulse bouncback from the front to rear intake charge. Try changing the rpms that the VDI opens and have it open later in the rpm to fix your mid range.
He should do this and then take it to the dyno
this is honestly the fix but he wont listen
You did all the porting and exhaust I thought I wanted for my rx8. Thanks for all the $ you've saved me so far. Nice to see you macro on the work done delaying for longer episode
I think you should continue trying to figure out how to optimize an NA hybrid Renesis, but don't block off all side exhaust ports. Doing that would essentially just give you a better S5 RX-7, which isn't anything new. 200 whp is very doable with a good compression stock Renesis so there must be something you're missing in this build. If it really does feel like it might be 150 hp, that's way more than the 100ish you dynod. I'd really like to see you dyno but just keep experimenting you're already making incredible progress. Love the videos
The SSV is not helping the brap, try to lock it open and see how it sounds, also the secondary inserts. Keep in mind mazda tried to get the most power out of the renesis without overlap for emissions you know this
The REASON they were able to get the most NA power was because of no overlap. they had been trying to do side port exhaust since at least ~1975, but had to stop development because of the oil crisis, then they started again in the late 80's. NA power is almost entirely because of the no overlap, and added benefit is lower emissions.
@connervinyard6476 Yeah, but it has no turbocharging efficiency. If the renesis had at least some wiggle room for modification, it would be the staple in rotary racing, unfortunately the renesis was MADE to be N/A and N/A only, we as the consumer have to take it upon ourselves to find a way to make them useful in our desired purpose. Especially with increasing prices on older engines
@connervinyard6476 although I appreciate the knowledge, I did not know that!
@@jimbowcracklehead8071 not everyone wants a turbo for various reasons. Street driving is not racing. Reliability better for N/A all else being identical. What are N/A 13Bs that idle well and drive smooth and have an semi-quiet exhaust get to the wheels? Just trying to help you realize what the Renesis is great for ... may not be applicable to you, but it doesn't make it irrelevant.
@zakuraayame5091 I love renesis engines for their smooth power bands, it's perfect for resto mods and street cruising with a peppy 150whp without the horrible low end. Me and the other guy were stating how renesis engines are shit with boost, compared to conventional rotaries. Also nobody wants a slug for a car no matter how great it is in corners, boost is almost certainly needed to be able to compete with other cars in it's class.
I thought the whole point of the five exhaust ports was to turbo it.
It would be an interesting video if it actually works in favor and gets more than a turbo version of the 2 or 3 port versions.
Great videos either way it is why I am tearing apart my fc3s engine's and rebuilding them.
Thanks, and keep it up!
BRAPP BRAPP 4 LIFE!
Keep it up. Been curious about all this for a long time. I've been playing with rotarys since 1980.
I see the same problems on every type of NA Renesis build, and the one thing for whatever reason people refuse to touch, is the Intake Manifold.
The whole system needs to be lopped off, and replaced with medium length runners, and ITBs encased in a well designed plenum, then sing it to 10,000+. That low/midrange power is going to have to be sacrificed to make real gains.
We GOTTA turbo the Hybrid before we turbo the Renesis so that we can finish up the Hybrid series with a direct comparison to the stock Renesis and then a turbo Renesis
Getting closer to figuring it out!
Definitely not your last hybrid N/A video, you want to solve this as much as we want to see you solve it :D
I believe you need to completely block of the centre exhaust port at the flange, as it alters scavenging between the 2 rotors, rew's don't have this.
Also lock tumblers open, or remove them completely from the intake manifold, and minimise all restrictions, free flowing intake.
I believe these things will fix it in na.
Turbo use all exhaust ports, remove all restrictions from intake.
Is the engine operating in closed loop until 5500 rpm? If so, go to ''load limit unk'' overwrite all values not 0 to 0.75 and go to ''closed loop air fuel additive 1'' and copy the load=0.9375 row values (all the same) to the rows above including load=0.75 row. This will let you go to open loop fueling instantly when load goes above 75% at any rpm.
I would be really curious if you can ever get your hands on a Pettit supercharger... or a frankensteined Procharger. More intake flow to match the added exhaust capacity without putting anything "in the way". Also machining the rotor tips for 2mm apex seals.
Very interesting series of videos!
I’m glad he’s doing all of this, thanks rad!!. Because I did taller apex groves and waiting to send it out to be balance. what is holding me back from putting my motor together is which center iron should I go with because of the exhaust turbulence, because I have a gsl-seI center iron.also made a custom mounting bracket for a rotrex c30-94. supercharger. Also on a versatuner, knowing that I will have to go full standalone. Wish I could stay with the versatuner.
@@xSc0oByDo0RaCeRx I just watched Rob Dahm and Mike from MotoIQ discussing rotary engines and one of the reasons we don't usually see supercharged Wankels is that the belt load on the e-shaft causes wobbling and increased flexing. This issue can be dealt with by adding a contact bearing (ball or double roller) close to the snout for added durability, but it's a pretty involved job. I suggest giving that video a watch, it's an hour long and loaded with info not commonly shared.
I believe leaving the SSV and VDI working might be making a lot of turbulence problems. I would try to do a run with the APV working (the rest disabled).
I admire your commitment.
I vote turbo. Thats the real potential of this combo. It'll likely need the rew apex seals though to survive. Love the video and thanks for all the great information.
Thanks for continuing the RAD Science on the hybrid!
Now we're talking! You've come so far, but you owe it to the channel to continue the learning experience. As many people have said since the beginning, the MSP exhaust is absolute trash. It's already well established that bridgeport renesis don't make power, so why would adding peripheral ports and thus destroying exhaust velocity make that equation any better? By restricting the MSP exhaust you are now starting to see what we were talking about.
While restricting them and essentially creating a Helmholtz chamber for the Siamese port is a step in the right direction they are still having an negative impact. Plus, once you ditch the side ports you can start to rely on existing information on exhaust optimization which should make the "tuning" ( and fabrication/ installation) component that much easier. AND you can save that hybrid flange for your eventual turbo build. #WinWin -- You have the airflow for 200 whp, now it's just a matter of improving the other side of the pump.
I have confidence you can boldly go where no one (who is brave enough to document it) has gone before!
Imagine if you got yourself a 2nd hand Hub dyno, I love the back to back testing I'm not gonna lie.
You need to build a long runner manifold that separates the Rx7 ports completely from the side ports as far back as you can in the exhaust path. Similar to how old school straight 6 engines used two pairings of manifolds and runners to the back sections of the exhaust
Engine dyno would come in really handy right about now, for trying multiple configurations quickly
Don't worry too much about the amount of exhaust flow, back pressure isn't required and it's definitely detrimental, turbulence could be an issue but it's happening relatively far away from the engine
i wonder of you were to collect side ports between the chambers. example. Front port of the front chamber is collected with the front port of the rear chamber, rear port of the front chamber with the rear port of the rear chamber. using the side ports to scavenge each other before being collected in with the peripheral ports. also, the whole intake system would need a complete overhaul to make this work right.
It seems that the n/a engine loses even more hp than being OEM, I thought that hybrid engine would work in n/a. Thank you very much for trying until the end
LONG LIVE THE HYBRID TURBO
It sounded so good up top in the higher rpms!!! Keep tuning it using your Butt Dyno!! & Shelve this Hybrid project so that you can start on your new car. To Turbo it, will take you longer to have a completed running car. It makes more sense to take your time with the NA work. You’ll get more views with na.
Make it peripheral intake port - devcon the intake ports and add a PP intake with ITBs 😁
turbo the renesis!!!!! love watching your videos.
Have you considered putting cutouts on it? You could play around with flow and figure out what works best for the header.
In case it isn’t obvious, run the cutout to a blockoff instead of open like they would normally be used.
I think it would be neat to see the merges changed so it's in pairs that scavenge each other, smaller primary tubing if possible. I think having the siamese port blocked off was the right call, maybe cut the center tube really short and re-cap it so less flow tries to go in there.
I agree.
I’d like to see renesis boosted was thinking of actually picking up an rx8 this week still debating on what I should do engine wise I always here and read about shouldn’t boost renesis so I’m curious what your thoughts would be love these videos bro really learning here thanks for that
I like what you did experimenting only the middle port though. I think you can get close to 200 with an updated tune taking it to the Dyno. I wonder with those tubes being long though if that is sending turbulence around the capped tubes and back at the rotor adding unneeded turbulence? I do like seeing all of these test and glad someone is doing them but the hybrid was built for boost and seems like it needs it for any real power gains.
I'd bet that the intake valves are the main issue here. I wonder what ITBs could make this thing do, or at the very least altering the intake valve opening
I’d like to see this on the dyno as it is with the MSP ports blocked, and try optimise the tune to see the results.
Then, add a turbo and try again with the 5 exhaust ports.
I think the only solution if your gonna run it na, you would have to run a periphial port for intake the intake to even out the amount of air flow the main issue would be the intake manifold.. I say just boost it and the increased airflow would be the best solution and be easier as far as fabrication goes
@Rad Potential Would really love to hear your thoughts on whether or not it's possible to put a 20B shaft into a Renesis and make a Renesis three rotor. (And then make a 6 - 3 - 1 turbo header for it.)
Run a twin scroll off the outer two, then the inner two. Block the middle at the flange. Make them short runners. Fuel rail. You could make better power
Turbo the renesis!
I think I know what the problem is with such lean gasoline, Rob Dahm explains it in this video at minute 25:00, but basically ¿overlap? What I understood is that a large part of the gasoline is leaking into the exhaust.
the video im talking about. th-cam.com/video/p8u0e6ZSQMI/w-d-xo.html
Oh that's a great point
You essentially now have an RE with no side ports. You want 200whp a stock Renesis will do that. Talk to any SCCA T4 racers. They're all making 200.
I have 229 whp with a stock renesis.
@@troyyoung4245 What is needed to get that power on a stock renesis?
@@Darkipod x2
What about butterfly valves in the exhaust similar to the variable intake system?
Lmao your comment on your height was exactly what went through my mind when I saw you in person
Would be cool twin turbo. RE ports to one. And the 7 ports to the other.
Next step make it turbo. Could 2 exhaust manifolds be used? one Rx7 directly to the turbo and one Rx8 without going through the turbo, even blocking the central port to make everything cheaper
You should have the factory R.X.8 exhaust ports run all the way back to the muffler in their own pipe and not RX7 ports.Run all the way back to the muffler in their separate pipe maybe??? I don't know , this is a really cool Project i'm enjoying your progress
Devcon the rx8 exhaust ports and put a turbo or nitrous it
Realize you're going to turbo it, but maybe use a different free flowing intake. The stock rx-8 intake is restricted and is a street intake. If you want real flow you need something that's got bigger runners to match the flow out the exhaust.
I’m curious to see what happens if you use GSL-SE irons or 12a irons.
Keep the flange, taper the extracted primary’s to exactly the same as the inlet total surface area, keep the scavenge lengths the same, even if it is a 7/8” inch 5 into 1
Needs nitrous peripheral intake ports with the renesis bridged 6 ports and a full renesis performance exhaust and a rx7 full race exhaust xed together b4 rear cans full renesis 50m ida intake and rx7 full 50mida intake dyno tuneing time. ????????????? turbo?????? Aswell????? Just a thought ...... 13b
I thought the purpose of the hybrid is for a turbo system not na. Kyle Mohan uses it for that reason it seems for better flow then a rew. Na just doesn't make sense with such high exhaust flow. I don't know his set up but they make a manifold flange for 5 ports for a reason. Don't waste your time with na. Go turbo with 5 ports.
Would there be problems with the overlap if you went turbo? Guess you would just need to be careful with injector timing.
I would say he'll just would you have the hybrid renesis in now why not do the turbo setup.
id be interested to see if you unblocked the middle port and left the outside ports blocked
In 1984 I bought a 13b from a company called rotary engineering. It dynoed at 227 horsepower. It had twin Weber two barrel carburetors and the header. I ran it in both an REPU and a 1980 RX7. It was not a Bridgeport, a 6-port or anything fancy, but it made $227 horsepower. Why is this no longer possible?
Something definitely seems off with the way it picks up. Have you checked the solenoids are connected correctly on the back of the upper intake, or checked whether one is faulty? APV/SSV etc
Twin charge the hybrid.
Just turbo the Rx8. You can start your other project too
Why not use the middle or side ports for a wastegate when you turbo it ? it will be the most effective way for wg in my opinion.
Keep up the good work dude!
I think your going about this the wrong way. Iv gotten 300whp from a 13b a few times for what it's worth. I think a gslse center plate or better 12a would've been the best move. That being said without taring it down one could shove some exhaust putty in that center port and weld the flange so it can't move then open the front and rear ports back up. The timing is good and the extra port area is worth it now the header really needs some fixing the primary size for the rx7 ports is fine we actually taper to it from 2in in my personal 320whp car but then use 1in for the renny ports with a nice smooth transition and keep in mind when wanting to take shortcuts that falling down the steps is easy than falling up them ie if it catches your finger going in it can help but if it catches your finger going out it will hurt a lot. Look into anti reversion rings ppl use on rx7s. The trick is gonna be gas speed pulling fresh mixture in. I'd move from this point to carbs and a simple intake manifold something homemade that we can change the length on easy without killing ourselves. It's gonna need some slip joints in both the exhaust and intake for Dyno day. Your gonna wanna play with the length on the Dyno and the street and know that whatever you settle on will be better when you cut the pieces and weld it solid. Now I understand that's not easy in the rx8 and changing the intake manifold isn't exactly a simple mater with the ECU. So I say standalone even a cheap dropbear would be perfect as we both know your not going carbie 😂. It's gonna be a lot of tuning time on the runners but I do think you could have a better powerband with more power with the hybrid but I think much like everyone making good na power your gonna have a lot of time in tuning these things. I do think the rx8 manifold is killing you here along with the communication between the center exhaust port at the iron level not even as far as the flange. I think it's doing intake while exhaust pressure is present from the other side and she's eating some of her own shit lf you will.
How come you didn't start with the 6 port engine? The 4 port makes less power than the 6 already and if the exhaust side is the same they're simply not breathing enough anyway. Adding more exhaust like this hybrid won't do it any good. I know plan is to turbo it. But I feel 6 port na then hybrid that then mess around with the exhaust and unfortunately tune every single ssv position across all rpm ans that's when hunting down some power might give some results. Big mission anyway but I absolutely love your videos man you're doing fricking great 🔥🔥
IMO a turbo renesis. The hybrid was a nice experiment, time to put it away.
Hawk turbo that thing man
I will say I'm tired of all of those memes but that's the best I've heard
Turbo!!!
Turbo!
close the rx8 ports then turbo
Turbo!!!!!
Question:
How can you get the weight of an rx8 down from 1,300 kg? And keep it legal.
Where's all the weight hidden? Safety stuff?
I think it's turbo time, try it with all the ports open first.
CAN WE SEE ANOTHER RX8 ON ERNIES DYNO?? I feel like it’s a heartbreaker dyno. I’ve seen a ton of dyno sheets with streetport renesis making 200whp. If a streetport renesis only makes 170-175 on his dyno well then your numbers will always be depressing.
My Turbo2 engine in the Radx7 made 336 at 14lbs which is pretty much on point I would think for the size of the turbo. I can get another car out there and do a more "control run" when I go for the turbo stuff.
Just from pausing the video and looking at the log, I think your issue is tuning, not the header. N/A Bridgeports love some timing advance.
Its should be turbo thats the main reason for hybrid Ren
Semi pp the housings
Waste of time to dyno I think. I believe if we've learned anything from this it's that the Renesis isn't the restricted nightmare the intertubes say it is. I'm still a rotary newbie since I've only owned a bone stock 2009 RX-8 for 4 years but I've figured out the rotary community has a massive amount of folklore and myth.
What's ssv?
Also msp?
@@jprazinak SSV = Secondary Shutter Valve (intake port valve) and MSP = multi side port ( aka 13b msp engine)
@@nightkingzz784 thank you very much!
5:1restricted header ez solution to back pressure lol....
Turbo the hybrid. It needs boost.
Turbo
Air speed ratio is way out..
turbo
It just doesn't make sense why this makes no power... like why?
2.5 swap
FIRST
Second😂
Turbo it!
The Renesis is just a crap engine. I'd be putting the old school 13B. At least you'll have real power.
Bronze
Youre telling me that RX-8's start everytime why does mine not start no more 🥲
It sounded so good up top in the higher rpms!!! Keep tuning it using your Butt Dyno!! & Shelve this Hybrid project so that you can start on your new car. To Turbo it, will take you longer to have a completed running car. It makes more sense to take your time with the NA work. You’ll get more views with na.
Turbo