Cannot break the 13 second curse!
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TECH Enthusiast
Joined: Oct 2004
Posts: 578
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From: Lincoln, Ne
Cannot break the 13 second curse! Ok my car has the power and seems to have the power on the street but something about the track i cannot figure out. I recently made 3 passes at Kansas City Internation Raceway which btw i was not impressed with at the least. I was running nittos d/r's which on the street i can hook with sidestepping the clutch at 4k rpms but on the track results in only spinning? Launch lower and i will only net a horrible bog.
Track Results:
1st pass
13.305@109mph with a 2.4 60 ft
So i thought by lowering my 60 foot time there would be no problem to run a 12, wrong!
2nd pass
13.36@108mph with a 2.2 60 ft
3rd pass
13.39@107mph with a 2.18 60 ft
I really have no idea whats going on my mods should be good for at least a high 12 second pass given my location. I have long tube headers, ORY, loudmouth catback, air lid, ls6 intake, ported throttle body and was running nitto d/r's. My trap speeds seem very low for my mods considering bone stock I ran a 13.5@108mph at a different track. I will be the first to admit i have very little racing experience on a legal dragstrip but countless runs on the street. I am not missing gears and am not shifting slowly it seems my problem is all in the 60ft, it would seem to me that i should hook better on a prepped course vs the street but i guess not.
Everyone who i went with seems to have been running slow so i am hoping a lot of my problems are merely track conditions but please for you guys with quite a bit of track time give me some tips like burnout length, launch rpms, slipping the clutch, etc.
Track Results:
1st pass
13.305@109mph with a 2.4 60 ft
So i thought by lowering my 60 foot time there would be no problem to run a 12, wrong!
2nd pass
13.36@108mph with a 2.2 60 ft
3rd pass
13.39@107mph with a 2.18 60 ft
I really have no idea whats going on my mods should be good for at least a high 12 second pass given my location. I have long tube headers, ORY, loudmouth catback, air lid, ls6 intake, ported throttle body and was running nitto d/r's. My trap speeds seem very low for my mods considering bone stock I ran a 13.5@108mph at a different track. I will be the first to admit i have very little racing experience on a legal dragstrip but countless runs on the street. I am not missing gears and am not shifting slowly it seems my problem is all in the 60ft, it would seem to me that i should hook better on a prepped course vs the street but i guess not.
Everyone who i went with seems to have been running slow so i am hoping a lot of my problems are merely track conditions but please for you guys with quite a bit of track time give me some tips like burnout length, launch rpms, slipping the clutch, etc. 
10 Second Club
Joined: Nov 2002
Posts: 1,471
Likes: 3
From: Berkeley, California
You need to experiment. Make small changes and find what works for you. Write tire pressure and launch rpm on your timeslips. Note whether you spun or bogged. It may take different tires and twenty or thirty passes and but you can be consistently in the twelves. Good luck.
you should be faster than me because i ran with bald 235/55 street tires and only have 2 gears to work with, of course i'm an auto, but for only having headers and a cutout, no ls6 intake, you should (in theory atleast) be faster than me.
and i think the 60ft/trap speed correlation is that the worse your 60ft is, the more time you spend accelerating so you should trap higher, quicker 60ft = less acceleration time should mean lower trap speed, note my 60ft/trap speed...thats just my thoughts...
and i think the 60ft/trap speed correlation is that the worse your 60ft is, the more time you spend accelerating so you should trap higher, quicker 60ft = less acceleration time should mean lower trap speed, note my 60ft/trap speed...thats just my thoughts...
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TECH Enthusiast
Joined: Oct 2004
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From: Lincoln, Ne
Originally Posted by tigertales
What psi are you running while at the track? Are you heating them up enough?
Hopefully my car isnt broken and its strictly my inexperience on a legal drag strip that makes me run so slow. 
They will cup if you lower the pressure too low. Even Nitto says to start at 20psi and adjust for preference. They also say not to go any lower than 15psi but some people have and prefer it that way. Ive had good luck at ~18~ psi at the track.
Thats crazy. I dont even run my nittos at 30psi on the street. The contact patch becomes too narrow for my liking.
Thats crazy. I dont even run my nittos at 30psi on the street. The contact patch becomes too narrow for my liking.
12 Second Club
Joined: Oct 2005
Posts: 536
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From: New Castle,IN- West Lafayette,IN
hey pal im right there with you in a way i should be way lower then what i ran i did break into the 12's tho ( not trying to throw it in your face or anything ) but my trap speed was 114.92 and i only ran a 12.84 .. i need to work on my launch more but good luck pal ..you need to launch hard so dont reduce your lauch atleast not by a lot try heating the nittos up more i mean almost melting them
Thread Starter
TECH Enthusiast
Joined: Oct 2004
Posts: 578
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From: Lincoln, Ne
ya I just need alittle more practice at the track and I have no doubt I will run a 12. Don't feel to bad about a 12.8 @ 115mph either, my friend took his vette down to the track the same night as I did and ran 12.8 @115, damn launches are screwing us up!
For M6, stock clutch, stock tires, stock REAR-END, you guys aren't affraid of dumping the clutch at 2500-3500 rpms ? rear-end won't snap ?
I'm in the same situation. I can't break into 12s with mods in the sig....
I'm in the same situation. I can't break into 12s with mods in the sig....