Thread: Turbo euro 300e
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  #10  
Old 05-28-2002, 08:15 PM
Speedtek Speedtek is offline
They call me Darth Speed
 
Join Date: Apr 2002
Location: Hawaii
Posts: 327
TURBO PSI vs CFM

Thanks for the invite.

Figure what is better:

8 psi @ 180 cfm
8 psi @ 300 cfm

Which makes more HP?

Everyone always talks about boost psi but forgets the CFM......
(CUBIC FEET per MINUTE - AIR VOLUME)

I learned early on to read compressor maps. You can go to http://turboneticsinc.com and learn more about this. I was using hybrid turbos back in the early 80's. I built some Turbo Nissan 280ZX's that would run 12 seconds on 8 psi.

Of course I am a HI-BOOST FREAK!
My motto is "Life begins at 18 psi"

About compression ratios. On a 6 cylinder engine i would not worry too much about turbo lag. As long as you get the right turbo the lag is almost un-noticeable due to the torque of having 6 cylinders. On a 4 cylinder engine it is worst. Running a Hi-Comp engine is good but the heat generated is sometimes hard to deal with. On 6 cylinder cars with 4 valves per cylinder I prefer 9.5 to 1 comp ratio. 2v I recommend 8.5 or 9.0. If you plan to run over 15 psi then I recommend lower ratios. Plus we could go on and on about pump gas.....you play you pay!

GOOD LUCK!

Last edited by Speedtek; 05-28-2002 at 08:23 PM.
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