ya your right.... just multiple pulleys on the crank usually! I guess multiple pulley's or not wouldnt affect the HP it takes to run the blowers or the parasitic drag in that way.

 

It doesn't really matter though--he gets more CFMs. More air --> more power.

 

juntuned, the project looks really cool! i hope you get it working.

honest question: why not consider just one C38 instead? you just want to try something unique?

 

Well, theres that R35 GTR thats quad charged ( 2 x T/c 2 x S/c) out there.

Drawing inspiration:

 

wow........ hope this works out....

 

I work in compressred air every day.
All it will do is up the volume, maybe even drop the pressure slightly due to pressure drops.

 

Are they in series, or in parallel? IOW, does the big one feed the small one, so that the delta-P's add, or do they both blow into the same hole, so that the volume is increased? Are you going for more pressure or more volume?

 

So give me some advice if u work in compressed air every day.....

would the joining of airflow be of most benefit pre-intercooler in the charge piping or post-intercooler before the throttle plate? If the Y intersection of air is preintercooler, would an oversized (bigger than kw) intercooler be advantageous? (would that affect cfm's) Also was thinking of seperate intercooled pathways and running the Y Intersection after the intercooler and before the throttle plate.

So if the CFM's would obviously increase, which is volume..... what would the psi level be, the same as wth 1 blower? would the overall psi still be retained or would it be somewhere in the middle of 1 rotrex output and double the psi output?

 

If you blow in series you will multiply up the boost. In absolute figures, say you are running 1.7 bar (0.7 guage) and in the second one (if it was running on its own, say 1.6 bar) then you will get (1.7 x 1.6) -1 = 1.72 bar (25psi) guage. Pretty good increase. You will also make a lot of heat so a big ic and w/m inj is a must. I did this on my Civic Type R 3 years back and it worked great but I needed a stronger spark and much bigger injectors (over 1000cc) plus stronger everything in the transmission department. MY twin sc project is also underway with my S2 but i'm starting with beefing up the engine/trans/diff etc first. I won't highjack this post with details. I'll post the results in due course.

Good luck.

 

your not hijacking the thread! your input is of VERY GOOD use. You have alot of experience with the rotrex and are open to new ideas. Thank you for your reply

My goal is to run this setup with a stock honda bottom end and trans. The diff will be upgraded in due course. My intention is not to build a radical drag car, but more a highly responsive, effecient highway (future time attack car)!. The car will most likely never see high rpm's in 1st gear.

Im confident I can make this happen with the resources I have around me including some of your help if you are willing to share. Initailly the blowers would be ran under low boost loads comparable to the kw low boost kits. Initial goals are simply to mirror my 400hp set up with a single rotrex.... but with two! After the bracketry is finalized and the charge piping and belt drive is perfected.... smaller pulleys can be integrated.