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Old 07-29-2014, 08:29 PM   #1239 (permalink)
tranceformer
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Join Date: Nov 2008
Location: Palm Beach, FL
Posts: 1,213
Drives: 2009 370Z PW 6MT
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Quote:
Originally Posted by Huck View Post
Hehe. But seriously, I need to know what I'm doing wrong. I tried blipping the throttle right before take off and starting from like maybe 2k rpm, no wheel spin. Then I tried revving at around 3500 and dumping the clutch and trying to modulate wheel spin. Got a **** load of wheel hop. Then I tried driving at around 5k and slipping the clutch. Couldn't get better than a 2.09 60'.

Zdayz 2014!!
Quote:
Originally Posted by Huck View Post
I've searched and read a few different pages, I was just wondering if anyone here had any other tips or tricks. The general consensus to be launched at 3500 rpm, and drop the pressure in your tires to about 28 pounds.

Zdayz 2014!!
Huck, it's trial & error. Depends on the track conditions too. What kind of tires are you running? Camber? Suspension?

I got my best results doing it this way:

-Rear tire pressure = 25 psi (although I felt like I lost a mph or two this way)
-Do a quick 3-4 sec burnout (I'll take sh*t for this) - puts a little heat in the tires and gets all the water out of the grooves
-hold 4,000 to 5,000 RPM at the line - not easy to "hold steady" with the drive-by-wire, i usually end up kinda of bouncing it around there
-'quickly' let out the clutch (not dumping it, but not slowly slipping it either)
-the split second the rear starts to squat, put your foot into the gas pedal HARD. if you spin at this point then your run is FUBAR. If you get on the gas too late, you'll get wheelhop.

With factory suspension, Sport wheels & tires, stock clutch I managed to cut high 1.8x to low 1.9x 60ft launches. Best I ever ran was 1.85 60ft. This was at PBIR down here in Palm Beach, IMO a very sticky track.

Side note: I'll never forget the night I was running low 1.9x and a few high 1.8x 60ft launches and some random hot shot at the track was critiquing my time slips. He said that I "need to work on my launches" and I'll be able to get some faster times. I asked him what car he was driving that night.... "oh that GT-R over there is mine".
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Ray
2009 370Z Base Sport 6MT / 12.860 @ 109.09mph / 1.921 60ft / street tires
official 1/4 mile track times
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