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Improvement, but not there....
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10-06-2009, 07:19 PM #1
Improvement, but not there....
So I went to the track on Sunday for the first time since the car was completely stock about 4 years ago and was only able to get in 3 passes due to several circumstances.
Here is the results:
1st pass (No burnout, launched at 2,500RPM)
1.99 - 60'
5.709 - 330'
8.739 - 1/8
11.336 - 1000'
13.489 - 1/4
2nd pass (Launched at 3,000 RPM)
1.926 - 60'
5.597 - 330'
8.616 - 1/8
11.192 - 1000'
13.336 - 1/4
3rd pass (Launched at 3,500)
1.902 - 60'
5.524 - 330'
8.497 - 1/8
11.051 - 1000'
13.1689 - 1/4
As seen, I was improving, but I still have a dismal 1.902 60’ time. I have never used DRs at the track, so it was a new experience for me and am obviously learning. I know the car has way better times in her. Tire pressure on all 3 runs was 21~22 PSI.
All comments and advice is welcome. Obvious advice is a driver mod My mods are in signature. Tires are 275/40R17 Nitto 555 DRs.It's stock.
10-07-2009, 03:16 AM #2
Lower your tire psi to 20 and see if that helps your 60' time, then try 18 psi and see if it it gets any better. I have Hoosier QTPs and 18 PSI works for me. My best 60' time is 2.02, but I have an A4. I've run a best of 13.09 @ 107 with a lid, LM1, tune, ported TB, LCAs and SFCs.
10-07-2009, 07:05 AM #3
Thanks. I was thinking that lowering the tire pressure was my next step. Also, I was going to try to increase my launch to 4K.
Any idea what kind of 60' time I should be trying to target?
10-07-2009, 07:32 AM #4
I would try 4k then 4.5K and see if your 60' times improve. For the mods you have I think your 60' times are good. You should look into some QA1 struts and springs for the front of your car or even skinnies. My old 93 T/A, M6, 9" with 375 RWHP would pull 1.6s 60' times.
10-07-2009, 07:59 AM #5
I don't know if I will be able to get to the track again before the end of the year with school and work, but I will try what you mention.
I know the Nitto DRs aren't optimal, but I had to get them over the M/Ts as this is a street car for the most part.
On my 3500RPM launch, with my best 60' to date, I came off the line slightly sideways.
I guess if I won't be able to improve my 60' time by that much more with these tires and trying the different combos of pressure/RPM, then only thing that is left is in my shifting.
I need to determine what RPM I should be shifting at in each gear to maximize my average HP.
10-08-2009, 12:10 PM #6
- Join Date
- Mar 2009
Arctic White, red/gray
- 1997 Corvette, 92 Typhoon
With nittos i would say 1.7-1.8 is pretty damn good.
10-08-2009, 01:44 PM #7
A 1.9 60 on stock tires is nothing to sneeze at. I dought you will get it much lower with what you are working with.
10-08-2009, 01:56 PM #8
I am running Nitto DRs though, not stock street tires.
I guess from what people had previously told me, I thought I would be running mid 12's, but I just don't see that happening unless I pick up a few tenths in both shifting and my 60'.
At best, if I lower my 60' time to say 1.7, I could potentially shave another 4/10's up top, so I could be hitting 12.76.
So maybe my last time of 13.16 isn't so bad afterall with the Nitto's...
With the car completely stock about 4 years ago I ran a 13.79 @ 104 on street tires.
10-10-2009, 04:18 AM #9
Ah gotcha. Your MPH definately supports mid 12 second runs easily,,,,,it's fully exploiting it that is the trick.
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