LS2 Head flow ?

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Apr 30, 2015 | 01:12 PM

LD85

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From: Indianapolis IN

LS2 Head flow ?

are the numbers below correct? If they are, I will wait to get ported heads below I install a camshaft

Casting Number 243
Head: 2001 LS6 5.7 Liter Passenger Car
Material: Aluminum
Part Number: 12564243
Combustion Chamber Volume: 64.45cc
Compression Ratio: 10.5:1
Intake Port Volume: 210cc
Exhaust Port Volume: 75cc
Intake Valve Diameter: 2.00 inches
Exhaust Valve Diameter: 1.55 inches

Stock Head Flow Numbers
Chamber 64.45 cc-------0.100---0.200--0.300--0.400---0.500---0.550---0.600
Intake 210 cc------------62------126----184----224-----251----256----257
Exhaust 75 cc------------57------108----143----163-----176----180----183

Apr 30, 2015 | 01:38 PM

Joe_G

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Joined: Jul 2002

Posts: 14,950

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From: St. Louis, MO

St. Jude Donor '08

Quote:

Originally Posted by LD85

Those look correct to me. Your heads aren't a bottleneck until you install headers, then a cam, then a FAST intake, then headers are the next step.

I created this thread with all those mods overlaid on one dyno sheet so you can see what I'm talking about graphically if you're interested.

https://www.corvetteforum.com/forums...ast-heads.html

Apr 30, 2015 | 02:49 PM

LD85

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From: Indianapolis IN

I have Kooks 1300 degree ceramic coated 1-3/4, PEAK ported LS2 intake and TB, Honker CAI, the cam is next but I guess if i do a Supercharger after the cam then the heads are probably ok

Apr 30, 2015 | 02:52 PM

Joe_G

Tech Contributor

Joined: Jul 2002

Posts: 14,950

Likes: 264

From: St. Louis, MO

St. Jude Donor '08

Quote:

Originally Posted by LD85

I have Kooks 1300 degree ceramic coated 1-3/4, PEAK ported LS2 intake and TB, Honker CAI, the cam is next but I guess if i do a Supercharger after the cam then the heads are probably ok

Yep. Stock cam is ok with supercharger too. Doesn't sound as good

but realistically, 450-500 rwhp is about the limit for a street car to have any semblance of traction on the street. Over that, you need drag radials and those have downsides on the street (don't get caught in the rain with them).

So cam AND supercharger is a recipe to spin your tires faster (unless you go to the track a lot then forget all I said).