S3 E24 & 25. 670 predator powered Renault gets a new exhaust plus upgrades
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- เผยแพร่เมื่อ 26 ก.ค. 2024
- Season 3 Episode 24 & 25. Jimbo builds a new exhaust system for the 670 cc predator powered Renault. While the engine was out of the car Jimbo makes several upgrades including removing the governor and adding some upgrades the the drive system.
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Jimbo
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Unequal length exhaust? Subaru guys approve! 👍 😎
I built a similar unequal length exhaust for my suzuki sv650 so that the exhaust would exit under the seat. I did back to back runs on the same dyno With the unequal exhaust and my oem exhaust That was cut and fitted with An aftermarket muffler. The result was a nine horsepower loss using the unequal length exhaust .
The exhaust looks neat, but definitely produced horrible results
@@AverageJoesracingteamSubaru guys don't care about power. They barely stay running stock.
Cries in ringland failure
Better than the stock muffler.. which was likely unequal length as well.
@@AverageJoesracingteamYeah, actual Subaru tuners are well aware how inefficient UELHs are, which is why equal length options are out there, but plenty of people prefer the burble and can live with leaving some power on the table.
You’re the Mr Rogers of small engines. Thank you for being my neighbor!
I sure hope he did that testrun in the early morning, when everybody were asleep! :-D
Now we just have to hope that Mr. McFeely's Speedy Delivery is bringing the parts for the next episode.
@@DeadKoby That is truly funny. It took me a minute...
@@antoniovillanueva308 Maybe upon delivery they will sing a song about it.
Jimbo, please think of using a snowmobile torque converter instead of the stock one. You're not running much power through it, but the vehicle weights noticably more than what it was technically designed for so it might slip without you even noticing. The guys from carsandcameras were using a stock torque converter in their small dragster build with an uprated V-twin like yours & they were losing noticable amounts of power & acceleration despite their build weighing nowhere near as much as the Renault
He’s not using the stock one, go back and watch the build series.
@@alexcoronathe output on a snowmobile might be heavier duty, but it's not what he's using.
It’s not stock. It’s a modified comet magnum 44.
Snowmobiles have 70+ horsepower, so yeah they have to have a much beefier CVT
We are using a Comet 44 series clutch system and its rated for 18HP. we are aware of its limitations and do plan on upgrading it to a Comet 700 series at some point.
You're giving tips to a guy who was once a Michigander, and I'm sure at some point he dabbled in snowmobiles. This ain't his first rodeo.
I'm enjoying how loud it is at 13mph 😂
My weekend last week felt so incomplete without my Jimbo fix. Thanks for a complete weekend this week!
Your neighbors love this project. They don't even need an alarm clock anymore.
It would be cool to see you put an O2 sensor on each pipe just before they merged. The individual cylinder data would be great for tuning.
Never want an episode, to end.
Jimbo, you just might've created the perfect TH-cam channel.
Thanks for bringing us all, along.
Pro tip. Once you have the header wrapped absolutely saturate the wrap with header paint. It glues it down and all but eliminates the pokies.
Thanks! I'll give it a try the next time we have the header out of the car.
Also, the wrap soaks up the paint like a sponge. You'll need more paint than you think.
It seems like this project is making far quicker progress than any of the others. I love your statement of "finding some new problems". That's excatly how all projects work!
LOL - that second gear take-off had me laughing.
Could do with a long chamber muffler to take out the raspy note, but retain the deep V-twin sound.
The treadmill almost got me at first 😆
Us Subaru folks are happy! Unequal length headers is a bit of our thing!
YES!!!! count me in... unequal length headers rule!... Meh..because I'm too lazy to make equal length..
So is breaking down, let's hope this doesn't do that often
@@robotcantina8957 Header length isn't so important with a turbocharger anyway! 😀
Begin the Turbo chant!
What a weird/waste of time thing to embrace. Is there nothing more exciting about Subies than header type?
I use my tig torch to melt thru the “spoon appendages” on governors. 50% of the time it works every time
What about the compression relief
Sounds like you have a plan....lol
@robotcantina8957 Hahaha, and still better than "hoping".
That 4th gear rolling start sounded great! 😂
Sunday morning routine is now complete! Love the results, can't wait for the tuning portion next week 🙌
I think a good stage two kit would be very deserving of being put into that engine. A stage 3 would be even better and those 670cc engines have a massive after market community.
Hearing a Harley-esque exhaust with a CVT acceleration band is definitely an interesting sound to behold
The Garden Gnomes are sleeping in the shade.
Running 60mph and holding back on the throttle? This thing is awesome 😂
She’s a bit spicy now, or at least it sounds the part.
I’d be interested in seeing a tach on the engine and on the trans input shaft, with maybe some wizardry that displays realtime RPM differential. To get an idea on where the CVT is in its operation.
Also, possibly already suggested or mentioned, but that carb tuner thing that Thunderhead may be a good candidate for testing on this setup (or vise-versa?).
Top notch video! I hope you’re enjoying making them as much as we love to watch them. Cheers!
I have a Kawasaki Brute Force 750, the guy I bought it from changed the factory exhaust to a KMF straight pipe type muffler, and it bike is incredibly loud, so much so, I didn't think I'd be able to use to go hunting. So, I took a stroll to the junkyard, and found a factory Stainless muffler on a 1990 Mitsubishi pickup, with a little welding of a flange, and a hanger. The muffler inserts into the KMF muffler, and shaves a large amount of noise off the bike that makes it very suitable for being in the woods, and after taking some full throttle rips, doesn't hurt the top end too much(At least the highest I'm willing to feel the top end, doing 60mph on some 29.5" High Lifters is the limits of my bravery.).
The muffler is also plug and play, I can pull if off and be loud for some mudrides, and throw the extra muffler on, and you hear the engine noise just as loud as the puffs from the back.
I say all that, as a suggestion, to find a large style 4-cyl exhaust, to not hurt the power of the engine, and still get a factory/OEM sound. Bonus points for old school flapper cutout.
I smile when you say "I chucked them in the lathe"...
When you removed the governor it felt like I was watching How it's Made for a minute. That's pretty neat.
The chop is real with this youngling.
396 BBC and a 4 speed M21 ?
I have found my Tribe ! 🤣
But seriously, thanks for all the mechanical shenanigans and entertainment.
It makes every weekend feel like Saturday morning cartoons.👌😀👍
HEY JIMBO! I have watched your channel for a long time but do not typically comment on videos. Anyway, me and a friend of mine did a full street legal build on a small UTV/SXS that is 300cc. The engine is based off of a Yamaha motorcycle engine with a CVT. It was loud and would not pass auto inspection. So what we did is replace the muffler with a newer but quieter version. Then we had an exhaust shop weld an exhaust flange to the end of the motorcycle muffler, then had the exhaust shop make some custom pipe from the new flange to a car muffler and also did some mods to hang the car muffler. We went with a Walker quiet flow. I think we paid like $35 for it. Anyway, this setup is basically using a stock motorcycle muffler as a resonator then a car muffler for the rest. It is very quiet now and you can't even hear it idle 100 feet away. It is not as loud on the street either and we can now play the radio. Just a thought for your setup for the muffler. May not be what you are looking to do but I am sure gave you some ideas. Love the videos. Thanks!
Thanks! We have already picked a glass pack muffler that provides a mellow sound without restricting the exhaust. It may not be as quiet as a Cadillac, but it should be good enough for rural Kansas. This will of course be in the next video.
@@robotcantina8957 Thank you for taking the time to respond!
Cereals packets make great gaskets. Years (and years) ago me and my mates would make our own gaskets from Cornflakes boxes, because they were free and often better than factory items. You can make hole punches from odd bits of tubing and taper the ends with a file or stone.
You can also buy that fibre gasket by the sheet. It's pretty cheap and it will come in handy one day, trust me.
Coffe and Cantina to start the day, why thank you, I believe I will!
Sundays have got to be my favorite day for the plethora of people i follow, sundays are some of the best.
Listening to the engine as you accelerated got me to thinking. A cheap way to shave a bit more time off of the old 0 to 55 would be to get a tuning kit for the torque converter.
You've done forced induction, so might be fun to see how compression and head work effect things. I've welded up both 212 and 420 heads (up to 12:1 or so range), and it made a big increase in power, and I believe fuel consumption. Cost me some time and welding supplies. I'd grab a spare set of heads to mess with as you do other things, though, in case you get a whoopsie like I did once. Don't drink and weld, kids.
get some gasket sheets and make one, it's usually done in 15 minutes once you get the hang of it, squeeze the gasket-paper against the surface you wanna match and the contours will show you where to cut... i haven't bought gaskets in years, i only make them from sheets.
In a pinch a cereal box will frequently work as gasket material, especially if gasket thickness isn't going to have an effect on other tolerances.
That cover looked like one side of a cereal box would have been the perfect size to cut a gasket from.
Nice to see one of the most despised Renault (in France at least) getting some care and enhancements.
When I was a kid we used to call the cheap, underpowered 4-cylinder engines lawn mower engines, because they sounded like them. Here, you took a real lawn mower engine and made it work! My hat's off to you, sir.
Sounds better than those cheap 4 cylinders too
For a gasket, go to your pantry and find breakfast cereal. Use the box to make a gasket.
Man I got really sad last week when I didn’t see an upload. But this episode really made up for it!! Keep killing it sir, you’re about to be TH-cam famous!
This project is so fun to watch. It makes me want to buy a mini-truck out of a salvage yard to build my own.
owo. You means trucks like the BRAT or Rabbit pickup?
@@SonicBoone56 Yes, a little Datsun, Mazda or similar.
Lol it sounds like the Harley from Terminator 2, awesome
For any incidental sharp things that get into ya from wrapping headers or any sort of fibers like fiberglass, a pair of brand new pantyhose works best, polyester will do similar but not as well, use pantyhose as a washcloth in a nice hot shower. Low pressure against the skin with lots of soap lather, and it pulls a majority out first go. It's a mad good way to take care of it when doing insulation or anything where you end up with small painful fibers in your skin. Hope this helps at least one person lol
Thanks!!!!!!!
@@robotcantina8957 no problem! That stuff can cause an itch that can only seem to be fuels by Satan himself haha it can make for a rough day
I bet your neighbors just love that noise
Loud pipes save lives 😂
Pro top: Duct tape helps pull those little fibers out of your skin. Works with fiberglass and those stupid fuzzy cacti as well!
Cruising at 55 with a lawn mower engine driving it is impressive. I need a project like that to play with.
I can't believe the matchbox toy car on the treadmill🚙🚙🚙🚙🚙 omg, I thought it was real!🚙🚙🚙🚙🚙
Your matchbox car on a treadmill DID fool me........I thought it was an RC car....... so props for that.
That CVT unit doesn't sound like it's really getting to the top of it's range (1:1-ish) until the engine is way up in it's RPM range. Maybe some looser springs in the driven unit and the gears in the transmission would be more useful? Right now it's like "pick a gear, any gear."
And a snowmobile cvt
As predicted, getting all of that heat out of the engine bay was a significant improvement.
I was really hoping you were going to run stacks with little flappers on top
Thanks, jimbo. I look forward to this every week. Your channel is like Saturday morning cartoons for men.......on Sunday lol
This sounds so mean but it’s all bark, no bite! 😂
True... its half the power of the original engine but its still fun to drive. So here is some insider info... we found a great muffler for the car and it sound awesome now. It will be in the next video.
This is by far your best project yet.
Dude, IDC what you do, its always a blast just going along for the ride.
Years ago I had a Subaru Justy with a 1.3 liter 3 cylinder engine, and the best muffler I could find was for a garden tractor, which I got at Tractor Supply.
I'd love to see the reaction from the locals if you drove it with the exhaust as is around Paris :)
to bad modifications aren't legal in France they'll impound / cruch it if he was to bring ot over there
@@lotuseater92 Yeah, the EU in general is a shithole to own a cool car.
Your muffler bushings were the perfect opportunity to cover why you didn't go with muffler bearings :P
Prolly because the bearing grease smokes when it gets hot. :)
I might need one of these engines for my already CVT-transmissioned DAF 31, it might actually make it faster than stock! Also could help with the whole expensive parts thing.
I had to google DAF 31... Hmmm... a nice looking little car. I reckon updating the engine to something more modern might make the car more practical and cheaper to maintain.
This thing sounds super pissed off, good job.
Sundays are for church and Robot Cantina...Love the content!
I remember being taught how to make a new gasket using a Corn Flakes box and a ball-peen hammer! I've done it a few times; it's crude, but efficient!
Maybe some sound-deadening insulation in the engine compartment, too??
Sounds like you need a carburetor with an accelerator pump in it. Maybe a Rochester 2GC, Carter BBD, Weber 32/38 or 38/38? Or, being those are made for much larger displacement engines (318s, 350s and such), maybe a 1 barrel car carb? Dayton Carburetor makes a 1 barrel with an adjustable main jet in it. It's based on the Holley 1920.
Fun episode(s). I really like the easy-to-see Speedometer! Homerun!
You can purchase sheets of gasket material.. I use Felpro gasket material for situation as you have.. simply put a little grease on the parts surface lay on paper and imprint cut it out. You can use the bolts for punch against a board. If you look at a bolt the end is made just for this it will cut the gasket material...😎 8 N Ford tractor muffler would work... I use to use them on Onan generator for Motorcoach.
u can also hold it in place and knock around the edges with a soft-ish blunt tool like the handle of a screwdriver. tap it enough and u'll actually cut it clean. learned that from an old lazy mechanic :D
Let me grab a bowl of Captain Crunch. It's Robot Cantina Sunday!
I bet your neighbors loved the test drive with no exhaust. Running like an angry weed wacker.
VGG on Friday and Jimbo on Sunday means a perfect weekend for me! 😁
Tony Angelo's Stay Tuned is doing a DIY Syclone build right now, too
@@jonathanschubert9052 I didn't know about him until now. They seem like cool cats too! Thank you!!!
Who’s Jimbo?
@@gregpallett1839 the hosts name.
I would love to see some go pro footage of the CVT working. It's interesting the way the RPMs go high then as thecvt kicks in the engine slows back down and slowly reaccelerates. Very cool project.
Sounds like a Harley! 👍🤘
You guys really improved your editing skills. Nice to watch
I felt the car was performing better as soon as you got it on the road. It seems this baby could really move (relatively speaking). Can't wait for the next episode. Keep up the good work Jumbo.
If you're putting an AFR sensor in, how about using Uncle Luke thunderhead289's special carb cheater on this and seeing how it works?
yeah seeing that system here would be awesome.
The way you fix the gasket deal is you glue gasket material onto the gasket surface with Gaskacinch, then trim off the excess with an exacto-knife.
Another matter: you might wish a larger oil cooler, with a scoop to direct air over it at speed.
I think a supertrapp muffler would be good- it's compact and gives you the ability to tune it with different plates. Used to be popular on old air cooled VWs. Your current rig sounds a lot like my friend's Super Beetle from highschool. And it's about as fast. Lol. Just needs some Black Sabbath playing through the Pioneer 6x9s and some burning parsley.
LMAO at the "potato, potato" of Harley engines! Took me back to my riding daze.
In your own style..... 0 - 60? Not to shabby! 🤔🧐👋🤗🤗🤗
I'm very surprised you aren't the type of person to have big rolls of gasket paper around to make your own gaskets at any given moment, hahaha. Also coulda gone with RTV of course. Holy crap this thing is loud and sounds ridiculous now. Loving the videos as always.
I bet some people were confused when they heard a Harley, but saw a weird old car... LOL. 😛
Faster...
Louder...
Better?
Stronger!
Thanks Jimbo! Sounding pretty good. I'm sure the neighbours will be happy when you put a muffler on the car. Fix the reverse gear already!
That governor shaft looks a Lot like the shaft on one of those old reversible screwdrivers.
That little car looks like a blast.
You and your cliffhangers! 😵💫 Looking forward to next vidya thanks!
Finally my favourite channel uploaded new video, so i can use free time on very important thinks ❤❤
AND actually, you dont need to dissasemble the engine, you can just bypas the guvernor by eliminating the springs and just putting backspring so it would not stayed open, I was really thinking about how to bypas the slow throtle responce, but keep the rev limiter for my cheapo 200cc china engine, and i came up with solution, that i will stick a lever directly in front of the guvernor that will push it only to the half and stop, use spring , that it will stretch the sping after the lever would bottom out somewhere around half or more throtle, and merge the original throtle with the directly pushing carburator half limited throttle after the spring part, so it would react instantly to about half (or more, it just need to be less than the position when the guvernot keeps the revs low) and still be limiter on max revs.
I love how it's "LOUD ~silent while changing gears~ LOUD"
"Correct gasket" is to glue gasket paper to the cover with contact cement.
Then cut off all the excess paper.
A rule of thumb for header pipe diameter is the exhaust valve diameter.
Make the header pipe long enough to contain 100% or more of the cylinder displacement.
You’re going to have a million people point out that the tube should be an equal length, but it can be more complicated than that depending on the design of the engine. Anyway, the lengths matter and are something that gets tuned for max power or economy.
Holy smokes that exhaust is peaking the mic every time you step on the gas.
This thing needs a muffler.
this is a fun build to watch and you give lots of the right kinds of details. thanks for sharing your findings and experience.
I was literally catching up on this series last night, and now I get a new video??? I should go get some lotto tickets, lol.
Well worth the wait for a missed sunday episode posting, keep on keeping on 🤘
Good to see you back on the road. As for the noise? I bet your neighbours loved you in the morning!
Have you heard of mufflers? An expression in HD circles I think is like: "Loud pipes saves lives" but should be supplemented with "Loud pipes make neighbors angry"
Nice movie.
Faster and whisper quiet! Something you love to drive on country roads.
A CVT with a manual gearbox is such a great combo
What an amazingly unexpected noise to be coming from an old Renault! I love this
The way is sounds is just amazing!
If you're interested in speed parts for the 670 you should check out performance 670, they have billet rods, cams, valve springs, and other kind of parts to hop these engines up
16:00 Gotta love V-Twins
Sounds like a ww1 fighter plane 👍
Well, it SOUNDS like a race car now. That's a start.
Please consider getting some gasket paper, some wad punches and a small ballpein hammer. It's pretty quick and easy making your own gaskets actually. I do it all the time on honda 125cc motorcycle engines. If you use "Hylomar Universal Blue" as a sealant for the gaskets, they never leak and never tear on disassembly so you can use them again. It's so good you can even reassemble with torn gaskets without leaks. It's fuel stable too. I used to use it all the time when I used to race motorcycles.
Keep it loud! Straight pipes save lives!