Does your C55 spin it's tires?
He also lost to my other friends 300whp 4AT Trans Am ( stock LS1 ) by about 1 car lenght.

How many miles on the car?
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Needs a tune?
Air filters?
I would throw it on a dyno, or take it to the track and check trap speed... that will tell you real quick the health of the motor.
When I bought a used z06 years ago, the 1st thing I did when I got it off the transporter was have it dyno tested locally to be sure no issues....... and I was please with 347 rwhp (it was the 01 z06).
That will give you pc of mind.
GL.
Needs a tune?
Air filters?
I would throw it on a dyno, or take it to the track and check trap speed... that will tell you real quick the health of the motor.
When I bought a used z06 years ago, the 1st thing I did when I got it off the transporter was have it dyno tested locally to be sure no issues....... and I was please with 347 rwhp (it was the 01 z06).
That will give you pc of mind.
GL.
What I'm wondering is if the previous owner put in regular gas the car should revert to a base timing map that should be considerably weaker than a premium gas map ( due to knock sensor activity ). We'll see what happens after I reset his ECU. He's had the car for about a week only.
He also lost to my other friends 300whp 4AT Trans Am ( stock LS1 ) by about 1 car lenght.
Still, there's no way a C55 shouldn't be able to break the tires loose from a standing stop.
We'll see...I'll play with it during the week.
I think your friends car may be a little down on power; in the course of my daily travels I've encountered 4 Corvette C5 pilots to date, all auto non Z06 cars, both from a dig and roll, and and my current stats are C55 4, C5 0. Not blow aways per say, but ahead by car or 2 every time. Of course, one never knows for sure what a Corvette, Camaro, or Mustang is actually running under the hood, but I've been quite pleased with the C55's performance, it holds it's own in the real world.


