Twincharging

[deevergote.]

I know I mentioned this in my supercharger thread, but I'd rather have a focused thread for this. The whole idea of twincharging really intrigues me! I know it would be very expensive, and probably fairly unreliable, but I want to explore the possibilities. I'm sure if I could do it, I would have the very first twincharged H22A CB7 in the world! Gwahahahahah! :driving:

I know for sure that it's been done on the Nissan March (stock), as well as the Toyota MR2 (aftermarket). I've also heard that GM has been twincharging their large diesel engines for years now... so it's not as strange an idea as I originally thought.

Does anyone have any ideas on how it could be done? I believe it would be possible to emulate the MR2 setup. I could use a Jackson Racing supercharger, a Garrett T04 turbo. I would have a front mount intercooler for the turbo, and a top mount intercooler for the supercharger. As for plumbing and all that, i still need to work through it. It's too bad that the twincharged MR2 is such a rare thing! I would love to have one to look at firsthand!


I'm still fairly new to forced induction of all kinds, so I'm still learning. I don't see why this wouldn't work on an H22, but I still need to figure out HOW it will work!

[xScott]

go for it. how could it be done you say? bolt stuff on and lotsa dyno tuning. thats how.

[deevergote.]

:lol:
Very true...

Now, the only thing that I'm concerned about (well, not the only thing, but ONE of the things..) is how to regulate the boost of the turbo into the supercharger. I don't want to damage the supercharger by forcing tons of air into it, but I want the turbo to be able to provide significant boost. This setup wouldn't be worth it if I couldn't get at least 400whp out of it!

[deevergote.]

I know that the .9L engine found in the March Super Turbo put out 110hp stock, and could be pushed up to 200+. Going on displacement alone, that could end up being close to 550hp. Of course, I know there are other factors...

My long-term goal for my car is about 400 wheel hp (500 crank, approx.). I'd love to be able to do that step-by-step, and have a rather unique car when I'm done. The twincharging idea appeals to me because I could start with a reliable supercharger while my car is still my daily driver. I could pull some nice solid power from it, and not have to worry about high maintenance (sc requires less maintenance and is less likely to break something, from what I've been hearing). Once I build up my engine, and figure out how to install a turbo system along with the supercharger, I can get even more power. That's what I hope, anyway! I'm still trying to figure my way through this!

I don't want to spend all that money on a supercharger, only to remove it later on for a turbo.


Also, before I even get carried away with this, would the JR SC even fit in a CB7?

[deevergote.]

The blowers i've read about so far have been roots blowers... i would think centrifugal superchargers would be better, since they resemble turbochargers a little more closely in design. I believe the March used a roots blower very similar to the JR design. At least from the pictures and diagrams I've seen online...

And no doubt about it, if I'm going to put a $3000 forced induction system of any kind on my $4000 engine (that's what it cost me after install...) you bet your ass I'm gonna get it tuned properly! :lol: I'm actually looking to get my car on the dyno this summer, after I buy some cam gears and a FPR. I'd like to pull as much power from it as I can now, and also get some experience with dyno tuning, so I know what to do when it matters... like when improper tuning will blow things up, rather than just make my car perform poorly.

[h22sparkle]

goodluck bro and may the force be with you and get up some pic's too

[MRX]

if u do manage to get everything on and are able to start it up...what about the ecu and ignition management...u'll HAVE to go standalone with a crap load of tuning

[deevergote.]

Yeah. I plan on standalone anyway, regardless. I hoped to have a fully built engine with a lot of boost using a turbo system, so a standalone system was part of the original plan anyway. I understand that this won't be cheap in any way! I hope to be making some real money soon, so if all goes well, I might be able to drop 20 grand or more into this car.
Anything can be done with time, money, patience, and pride!

[MRX]

i bid u the best of luck then...also while we're on the subject of boosting, i have a f22a1 motor and a f22a6 camshaft that i haven't installed yet...should i install this cam or keep my a1 camshaft after i boost the motor?

[deevergote.]

Are the camshafts different? I thought they were the same... I thought the only differences between the a1 and the a6 were the intake and exhaust manifolds...

[HondaFan81]

No, the intake lobes on the A6 camshaft are larger for more duration & lift than the A1/A4