ls6z28ma

ls6 out of a 2002 z06- ~80k on motor
ported 853 heads
ls6 intake
comp .570/.534 118 separation unsure of duration
3" x pipe axle dump
K&N FIPK w/ SSRA mega mouth
85mm ported maf
92mm holley sniper tb
1 3/4 long tubes
shift kit/2400 stall 4l60e
d585 coils
underdrive pulley
shop i bought it from guessed 360-380, does that seem about right?

G Atsma

You should find out the duration if possible. Lift means relatively little compared to duration.

ls6z28ma

called the shop that i bought it from, they said they do not remember, and just described it as a pretty mild cam, so im thinking maybe a 224ish.

G Atsma

Look thru the Comp LS cam catalog and see which cams have the lift and LSA you stated.
Funny how the EXACT lift and LSA numbers are stated but the most important ones are in the wind??

G Atsma

You dumped the 243 heads that all LS6's come with for 853's?? Backward move. Even ported, the port shape is not as smooth as that of the 243.
The 92mm TB gains nothing as the inlet of the LS6 manifold is 75mm. That will limit flow to what the OEM 78mm TB already does.
Any real gains will be from the headers/exhaust system and the unknown cam.

KW Baraka

iTrader: (7)

From the looks of the lift on the lobes, I'g gonna say that this is a custom (choose your lobes and duration) cam.

I've never seen a Comp cam with a -.036" difference from the Intake to exhaust lobe....also, looks like a cam spec'ed for boost.

KW

99 Black Bird T/A

iTrader: (4)

0 whp to 400 whp based on the information at hand. No idea without cam duration.

Did the shop selling you the engine put it together?

Biebs

360 to 380 is spot on see my signature

KW Baraka

iTrader: (7)

Well now......

Comp Cam #54-103-11 is the first LS cam listed in Comp's catalog. The specs are"
210*/218* duration, .570"/.541* lift (1.7 rockers), 118* LSA.

Comp Cam #146-103-11 has the same specs.

KW

99 Black Bird T/A

iTrader: (4)

~ 365 to 375 whp