Calling RaysVette
I thought about your problem tonight and think I have something.
Have your shop check your O2 sensors. I saw another SC vette on a dyno pulling about 100 HP less then expected because of a bad O2 sensor. Take 100 HP away from what you should be putting down and you'll be putting down about 10 - 20 more HP then my car. That much loss would explain why we ran so close...
Cheers, Steve



