C6 Head Only Swap Dyno Results

[silverc5vert]

Below is a graph of Livernois Motorsports C6 shop car with the only mod being stock heads ported by Livernois. NOTE: These are actual "uncorrected" numbers.

For photos of the swap and before and after shots of the heads, please go Here

Rick LeBlanc

 

[Hib Halverson]

I think that gain is demonstrated with bogus numbers.

It's possible they saw that much at the wheels after the head work, but I doubt the baseline number. In my opinion, it's way low. A tactic to make dyno results look better than reality is to degrade the basline number which can be done a number of ways.

Even if the base line was up around 340-345, where it should be, the gain is still notable.

Interestingly, when I interviewed GM Powertrain sources about the LS2, in the part of our discussion about mods, I was told if one installs the 02 LS6 camshaft and valves and ports the heads the gain is about 25hp....which is right where those dyno numbers are.

 

[silverc5vert]

I know for a fact that it has a stock cam, and ONLY headwork (porting, valves, and springs). Keep in mind they are "uncorrected" numbers.

Here is a C6 graph I found on the Corvetteforum, look at his numbers...
pretty close to mine.

-Rick

 

[c4c5specialist]

HI there,
I would be worried.
My first c6 customer dynoed his 2 weeks after purchase, and he was running 357 at the rear wheels, 351 ft lbs of torque. No mods, six speed, Z51 with 1573 on the odometer.
I would be concerned if a brand new c6 ran 329/331 for numbers with a six speed.
Allthebest, c4c5