corvette track update....
Posted: Mon Oct 03, 2016 11:27 am
Okay gang, I took the Vette to Topeka on 9-24, and found out it really likes wheelies! I made 4 passes while I was there. We were just there to run 1/8 mile and I was launching it fairly hard. Running 11.40's at like 80 something mph. Then on my 3rd pass I just said screw it, and let it have it. I had gone from 10 to 12 psi on the tires, and was hooking very well. This time it spun on the hit, and 60' 1.40 something, bumped the rev limiter on the 1-2, and rode the limiter for about 2 seconds across the stripe. Went 6.50 something to the 1/8 @ 111.25 mph and, 10.15 @ 132. Next pass, lowered the tires back to 10 PSI and raised the rev limiter from 7200-7400. Went 1.34 60', and botched the shift, and went from 1st to 3rd went 6.50 something to the 1/8 at 109, and 10.05 @ 136. And it ripped a tub out and broke a chunk out of the body on that pass. So we were done.
Fast forward 1 week. Dad was nice enough to get me some new slicks that didn't rub. So I went from a 31.5 X 12.5 W to (31.9 X 13.5 actual) to a 29.5 X 11.5 W (30 X 13 actual). And headed to our local track. We set the tires to 10.5 and got to work, and started hot lapping the car as we had 1 hour before they closed the lanes. Big thanks to Kansas International Dragway, for letting us in at all!!!
Made 3 passes, first pass, it spun off the line and went 1.40 something 60' and humped the crap out of the limiter and went 10.11 at like 132. About what I expected. Second pass, kind of the same thing, 1.40 something 60' but I made a clean shift on the 1-2 and holy crap!!!!!! 115.8 to the 1/8 mile, and 9.66 @ 132 putting the MSD rev limiter to the test for 300 feet! HOLY CRAP!!!!! I thought for sure it was a mistake, so I rolled right back into the staging lanes, and gave the car about 20 minutes to cool off. Let the tires down to I think 8 psi, and asked them the give the starting line a little spray to see if I could duplicate the 1.34 I had in topeka. Told the ol girl I loved her and clocked back in. I was rewarded with a stout wheels up launch and a 1.32 60' pulled 114.3 to the 1/8 at 6.14 and at 1000" was 129 mph. Crossed the line at 130.5 at 9.65!
The trans was a little warm at 180 on the last pass, so I think that's where the mph went. So trying to math out if I need a 4.30 or 4.56 gear, to run it out the back door. I'm sure it will lose a little to the 660 mark with a taller gear. but now I'm hungry for a 9.30 pass. We have not played with timing, shocks, plugs, jets or anything. So I'm pretty sure I can scrounge 3 tenths out of the poor little motor. But holy crap, I was shocked at what it did!!!!
10.05 in Topeka
https://www.youtube.com/watch?v=DsbT4saJcCY
9.65 in Wichita...
https://www.facebook.com/apache.racing. ... 647469816/
Fast forward 1 week. Dad was nice enough to get me some new slicks that didn't rub. So I went from a 31.5 X 12.5 W to (31.9 X 13.5 actual) to a 29.5 X 11.5 W (30 X 13 actual). And headed to our local track. We set the tires to 10.5 and got to work, and started hot lapping the car as we had 1 hour before they closed the lanes. Big thanks to Kansas International Dragway, for letting us in at all!!!
Made 3 passes, first pass, it spun off the line and went 1.40 something 60' and humped the crap out of the limiter and went 10.11 at like 132. About what I expected. Second pass, kind of the same thing, 1.40 something 60' but I made a clean shift on the 1-2 and holy crap!!!!!! 115.8 to the 1/8 mile, and 9.66 @ 132 putting the MSD rev limiter to the test for 300 feet! HOLY CRAP!!!!! I thought for sure it was a mistake, so I rolled right back into the staging lanes, and gave the car about 20 minutes to cool off. Let the tires down to I think 8 psi, and asked them the give the starting line a little spray to see if I could duplicate the 1.34 I had in topeka. Told the ol girl I loved her and clocked back in. I was rewarded with a stout wheels up launch and a 1.32 60' pulled 114.3 to the 1/8 at 6.14 and at 1000" was 129 mph. Crossed the line at 130.5 at 9.65!
The trans was a little warm at 180 on the last pass, so I think that's where the mph went. So trying to math out if I need a 4.30 or 4.56 gear, to run it out the back door. I'm sure it will lose a little to the 660 mark with a taller gear. but now I'm hungry for a 9.30 pass. We have not played with timing, shocks, plugs, jets or anything. So I'm pretty sure I can scrounge 3 tenths out of the poor little motor. But holy crap, I was shocked at what it did!!!!
10.05 in Topeka
https://www.youtube.com/watch?v=DsbT4saJcCY
9.65 in Wichita...
https://www.facebook.com/apache.racing. ... 647469816/