Went to the strip tonight (Las Vegas Motor Speedway).

Temp was about 100 degrees; 7% humidity; 29.60 barometer; 21 degree dew point. Works out to about 5600' DA.

I was having alot of problems hooking up. Tried feathering the clutch from 2000-2500 rpm's, then from about 1500 rpm's, but still spun alot. I did practice my powershifting from 2nd-3rd & 3rd-4th. However, I think in the future, I'll just shift normally from 2nd-3rd, as the rearend was wanting to break loose. I didn't lower tire pressure any and am running on Toyo TR1's (stock rims). Besides the tires, the car is otherwise a bone stock 2003 ZO6.

Best run for me (60' owns my ***).

RT: .940
60': 2.379
330': 6.179
1/8: 9.144
mph: 83.75
1000': 11.644
1/4: 13.754
mph: 106.90

Strange thing was I had another run where I completely missed 4th and just coasted across in 3rd. This was the time I got...

RT: 1.776 (forgot to put car in gear and was in neutral at green light)
60': 2.348
330': 6.118
1/8: 9.076
mph: 84.16
1000': 11.570
1/4: 13.865
mph: 93.94

Any tips, suggestions, criticisms? Any guesses what the 2nd run I listed might have yielded if I actually shifted into 4th, based on the other numbers?

 

The second run posted had a 60' better by 0.031 seconds. At the 1000' you were 0.074 faster. I'd say that the 1/4 mile ET would have been no more than a tenth quicker than the first posted run, probably more like a 13.67 to a 13.68. There would have been little to no difference in the MPH, as that varies by the power your engine makes, more than anything else.

RACE ON!!!

 

I say you need more seat time & practice....
Concentrate on the launch & FORGET reaction time. That has NO effect on ET or MPH.
You're feeding too much throttle too quickly if you're still spinning w/ a 1500 rpm launch. Roll into the throttle as the clutch is coming out.
You also need to drop down your rear tire psi to about 26 psi. Without this, you won't get traction off the line.
Make sure you shift as quickly as possible & right at 6500 rpm's, so watch your tach closely. Also raise your front tire psi to 40-44 psi.
Finally, don't power shift! Save that for your seasoned veteran days when the weather & track conditions will yield a personal record.
Powershifting the 1-2 shift will cause wheelspin & HURT your ET, ESPECIALLY on street tires!
On my record C5Z06 run, I didn't (and never did) powershift 1-2.

Good luck!

Ron

 

Thanks for the tips. Next T&T is in two weeks. I'll adjust the tire pressures and practice more on the launches.

 

Buy some drag radials or other sticky tire. You may learn to manage and get better with those Toyos, but they will never match a traction tire.

RACE ON!!!