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1/4 Mile gurus, some advice please

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Old 04-30-2003, 08:04 AM
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Default 1/4 Mile gurus, some advice please

Here is my set-up:
-APR chip 100 Octane program
-Stasis Coilovers (600f/700r)
-Falken Azenis Sport-225/45/17 (46psi all the way around)
-everything else is stock

So I'm off to the track on Friday and in preparation I tried out a few launches with the new tires. These tires are quite a bit stickier than my old Pilot Sports, so I launched a bit higher than normal ~4500rpm...oh boy...unlike the old tires that broke loose these ones just stuck. Needless to say some major clutch slip ensued and the air was filled with that unmistakable smell.

What can I possibly do to prevent this...launch higher? I will wet the tires before (drive through box) but not sure if this will be enough.

Any advice appreciated.

BTW I ran a 13.3 last year...sure would be nice to beat that.
Old 04-30-2003, 08:06 AM
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Default 46 psi? Seems way high to high to me....

Is that the pressure you're running on the street? Or was that pressure just for the drag racing?
Old 04-30-2003, 08:09 AM
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Default Re: 46 psi? Seems way high to high to me....

That's what I run on the street, will probably go higher @ auto-x events. I don't mind the rough ride.
Old 04-30-2003, 08:13 AM
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46 PSI cold is too high. When your tires get hot you are probably at or near the limit of the tire.
Old 04-30-2003, 08:14 AM
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Default You're going to have some really poor wear with pressure that high....

...you're going to wear out the center of the tread before the outer edges.

Additionally, you'll get better 1/4 mile results if you lower the pressure. I'd drop it down to the recommended pressure listed on the inside of the fuel filler flap, and maybe even drop it down a few psi from there.
Old 04-30-2003, 08:16 AM
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Ok but to get the tires to break loose wouldn't a higher PSI be better?
Old 04-30-2003, 08:19 AM
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Default You have quattro why would you even want them to break loose. You have better traction than most

from the start.
Old 04-30-2003, 08:22 AM
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You are right traction is great...but what about the poor clutch...help!
Old 04-30-2003, 08:25 AM
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Default This car really isn't meant for it. It's a pig. If you want a drag car get something else. And

besides since you have a better traction advantage than most you don't need to drop the clutch at 5000rpms or whatever.
Old 04-30-2003, 08:30 AM
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Default If you launch the car correctly, your clutch will be fine.

Launching at that high an RPM will cause you to roast a clutch more times than not. I know what to do to launch this car, I just don't know how to explain it....heheheh..

My best times were always around 3500-3800rpm launch....but you have to know just how long to slip the clutch before giving it WOT and releasing the clutch all the way. If you ride it too long or launch to high, it will slip and you will come back to the pits with a bad smell. When done right, you won't smell any clutch and you'll have atleast a low 1.8 60ft, if not a 1.7.

Good luck!


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