I am not sure of what engine package he has. The only thing I know is that he has changed the turbos, headers, exhaust, intake and computer. I just know he claims it is somewhere in the mid 600 range. I am guessing this is at the crank, not wheels.

 

Craig,

I agree he probably could have reduce his elapsed time if could launch the car properly, but the start should not affect the MPH right? I thought that generally stays consistent no matter how bad you blow the launch.

 

More or less, you are correct. Unless he was shifting like a grandma and/or spinning through the first three gears, his MPH should stay rather consistent even if he blows the 60ft time. That is a general rule of thumb. Granted, there are always exceptions...

 

Yes they do. High altitude affects air density thereby affects air:fuel ratio (rich vs lean).

 

Are you saying high altitude does or does not affect a turbo's performance. I always thought it did not, but what do I know. Maybe what I heard was that turbos were not affected by high altitude as much as NA cars. Does that make more sense?

If so, how much better performance would you have at sea level versus 5000 ft given everything else was equal?

Thanks.

 

actually.. ur car will run better when leaner... versus when rich...afrs...
more power... buts where u get into danger as well....

 

I am assuming a leaner situation is at lower altitudes versus higher altitudes, since the oxygen is much denser at sea level. So this would mean our cars would run stronger at sea level I guess.

Right?

 

the oxygen the more air and thus more fuel is required.... but if ur car sustains proper fuel ratio.... Im not sure what the difference...
what I do know is that ther is a formula where 20 psi for example at 600 ft above sea level is about 18.8 psi at 2000 ft. and so on and on...

 

Thanks Markski.

 

High altitude do affects turbo performance. However, stock Motronic ECU in your car have the ability to automatically adjust the AFR thereby compensate and adapt to whatever condition you're running in.

 

I know Mickey Thompson and BFG makes a drag radial for a 17" wheel and Nitto makes a DR for an 18" wheel as well.
I pulled a 1.61 60ft off of my M/T DR's and its a 3600lb car. I HIGHLY recommend drag radials.

 

Our main problem: MASSIVE wheel hop

The engine actually sits on top of/behind the rear axel. It's not a pretty sight when you try to launch hard, that's for sure.

 

My GT2 beats Z06's, I have raced 2.

 

C6 Z06s or C5 Z06s?

 

I think I now agree with my buddy that elevation conditions affects performance.

I just remembered last year when I drove up to Incline Village (Lake Tahoe) in the GT2 that my car actually felt a lot slower accelerating up the grade versus in the Sacramento valley. I don't know the elevation difference between Sacramento and Incline, but it is substantial.

I think I may give him a benefit of a doubt that if he pulled 126 or 127 at approximately 5500' that at sea level over 130 is possible.

What should a stock GT2 trap at the dragstrip? 118? 119?

BTW, I found out he has a GT640 kit on his GT2.