It may seem like 650 cfm is enough for a built 360, but, why else do
magazines use 750-800 cfm carbs on their engines. You have to remember that
ideal efficiencies are just that, ideal. Car Craft did a 360 buildup and
used a 750cfm Speed Demon to pull in 408hp and 434 ft lbs. I have seen tests
where 800 cfm carbs have added significant horsepower to a 340 engines that
were using carbs that were a little bigger that reqired. Those formulas are
good for street engines but go out the window with radical (race) engines.
Mark Kuzia
flyboy01@mediaone.net
http://people.mw.mediaone.net/flyboy01/home.html
1995 Dakota 13.79 @ 102.45 mph
360ci, 5-spd, 4.11 LS(8 3/4 coming soon), Cowl-induction
(A new E-body 8 3/4 [3.90 SG] has been built by Reider Racing)
http://www.twistedbits.net/WWWProfile/dakota/FqNiqqo2UjQOY/
> In your case Will, sure it'll work...hehehe...you probably need it. But
on
> these stock R/T's (or 5.2/3.9L engines) that's just too much. Going by
the
> calculations that I have for max CFM rating, a 360 turning 600 rpm
requires
> 688CFM.
>
> Here's the formula: ((Max RPM * CID)/3456)*1.1 (The 1.1 is for that
extra
> air flow...just in case.
>
> Granted, this would depend on Cam, Heads, Exhaust, S/C or Turbo, but that
> calculation is for a "Bone Stock" configuration.
>
> - Bernd
>
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