SilverGT03

Wednesday night I'm heading over to the track with a couple of buddies to get a couple of runs in. The current tires I'm running now are completely horrible so traction is going to be an issue. With that being said would removing the spare tire and jack help me or hurt me(more weight on the rear wheels for traction possibly?) and also what would be the best tire pressure for the front and the rear for the track?

firehorse02

Spare tire and jack aren't that heavy so I wouldn't worry about that to much. Probably would barely make a difference (if any). Front tires should be aired up to their max psi. I run 51lbs in my fronts which is the max psi on my tire. Rear tire is going to be based on the track and car. It's going to take some playing to get it right. Start off at 16psi. If you spin your tires then take away, if you bog out then add. The first time I ran I was using some hard 400 tread rating tires but launched good with about 15psi. The track was prepped really well that day. Just play around and find what your car likes and doesn't like

SilverGT03

thanks for the help!

stangalator

ill have to remember that for my track day
may 6th

WhiteFoxGT

If you are on street tires, I wouldnt play with the psi in the rear, it wont really help you at all. If you air then down you'll loose contact patch just like having to much air in them... Keep em around 30psi...then pump the fronts up

lizzyfan

At least disconnect your front sway bay bar for better weight transfer

dennis_112

I dont think the rear tire psi is going to help you on street tires, get you some new rubber if you plan to go more then once. And you might as well lose the weight you can, spare tire, jack, cd's, etc. The biggest thing with street tires is feathering the clutch/gas so you minimize spin, but yet go fast at the same time. And a burnout is going to make your tires greasy, when I ran street tires I would go around the water box, and just spin the dirt off the tires with a quick clutch dump. I wouldnt white smoke the tires so dont be confused. Literally just a half second chirp. And I could be pretty good if the track was prepped alright.

89LX Coupe

+1 on the above statements.... Leave the rear tires at 30-35psi Drive around water (If possible) quick little spin the tires over to knock the dirt off. Best way I've launched was holding the rpm's steadily at 32-3500 then gradually give more gas as I slip the clutch out.

I've pulled a best 60' of 2.06 and did a 2.10 on my best run that's in my sig on these http://www.tyrereviews.co.uk/images/...r_sport_m3.jpg so if you don't get too nervous and dump the clutch you should be good.

firehorse02

I'm just going off my experience but I do admit I've only ran on streets 5 times so I don't have the most experience with them. I was leaving at 1500rpm's and the tires got loose every time until I got down to 15psi then they launched perfect.

SilverGT03

Like firehorse every time I try to launch at 1500 rpms my tires break loose. Then again I haven't tried it like you said, and let the clutch out nice and smooth.