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oldcorollas
Forums Junkie


Location:
Kita-Ku, Sapporo, Japan
Registered:
January 2003
 
Re: ae86 20B convertion Fri, 12 March 2004 02:34 Go to previous messageGo to previous message
from rough calcs on the net, assuming you have 2000lb car with you in it.

you'll be needing:
772hp for 8 flat
833 for 7.8
902 for 7.6
976 for 7.4

so assuming you need 800hp = approx 600kw
(and remember that these calculators are based on pretty flat torque curve V8's (compared to turbo motors)

600kw at what rpm? sayy, 7000??
that gives 805Nm

805Nm = 20psi boost (ASSUMING 95%VE, ie a well developed motor)

since you are doing it on a budget, and probably won't be spending weeks on a dyno, your VE will be more likely to be 85-90, which means you'll be needing to run around 23-25psi boost.

but this is only if car + you = 2000lbs race weight.

if you add 10% weight, you need 10% more power and vice-versa...

hmm, so. what turbo for 800HP?? thats AT LEAST a GT42/45 from Ray Hall (http://www.turbofast.com.au/sales.html)... $3.7K
http://www.turbofast.com.au/GTpictures.html

chances are you'll have less than ideal porting etc, so you'll need a 850-900hp capable turbo, and a wider torque band. as well as properly tuned rear end to actually get this power down...

anyhoo, sounds like a great project.. please update your site with pics as you do the work, i'm sure EVERYONE (well almost) will be watching you to see how it all goes Very Happy Very Happy Very Happy

Cya, Stewart


[Updated on: Fri, 12 March 2004 02:48]

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