gator's 99TA

iTrader: (2)

i think what would be helpful is if you posted your 60' times with these tire pressures and how you set them up. honestly, and not to be mean.... if you post your tire psi but only pull 2.0-1.8 60' times, then the info is not too valuable for most of us.

as for hooking at 20-22 psi - take a look at the more important issue - combinations. my car is an auto coming off the footbrake. i dont need much suspension to go 1.4 60' times on the radial tire.

Smokinstorm

iTrader: (5)

22 did NOT work for me tonight. Track condiitons I think have a whole lot to do with whether you can run 22 PSI or have to go lower in search of traction. In all fairness to the tires, the track was so bad tonight that they closed down the right lane after the track had been open about 5 minutes and completely redid it while letting cars go down the other lane. This was after about a half dozen different cars tried going down that lane and all nearly crashed. Since no one was hooking at all even on 15" wide slicks I don't think that's a fair evaluation. The other lane wasn't hooking much better for me but others with big *** slicks were able to grab the track in that lane OK. I lowered the air pressure to 20 PSI and was able to get a little traction but still not much. My typical low 1.6x/high 1.5x 60' times were in the mid/low 2's tonight on all but a couple of runs. After they redid the track I went out there and drove the car myself and pulled a 1.69 60' time rolling out and not matting the gas right from the line. After that I sent my driver back out there and he went 1.62 60' in the now properly prepped lane. Remember it was hotter than all get out tonight so the times were slow because of that. I'm convinced that track prep is the key to making these tires work their magic. Better track prep=run higher pressure. Worse track prep=run lower pressure. That's just the way it is.

bigdsz

iTrader: (1)

Smokinstorm, you said it all, track prep is the name of the game. I'd rather pay another $5 for some good track prep, so that my car hooks.

Unstang

iTrader: (26)

I only got 4 1/8 mile passes on them tonight, 1st time out with them, 275-40-17s. I didn't get to mess with launch technique at all, I ran them at 15 psi...Better try them higher it looks like.

I got a 1.77 on a 7.75 pass & got a 1.68 on a 7.24 pass...

skinnies

iTrader: (33)

I run the 275/40/17's at 18lbs on a 8.5" wheel. With foot breaking it to about 1200rpms and then just nailing it I'll go 1.58-1.59 dead hooking with the pt4000 and barely pulling the front 17's off the ground. I've only stalled it up once to 2800rpms and nailed it and it did a 1.54 60ft pulling the fronts about a foot on the left and 4" on the right. I need sfc's still, and also I haven't been stalling it up all the way due to the fear of breaking the stock ds or the whining 10 bolt.

next

iTrader: (9)

There's folks on here that will offer plenty of advice to help you if you would say what your suspension is. Trying to fix traction with tire pressure is the right move AFTER you have a complelety dialed in suspension. Then and ONLY then do you start with a low pressure where you hook and each pass raise it a 1/2 lbs until your 60' slows down.

redline2k

iTrader: (9)

Yes your right, Osw dosen't hook. Ya right. Test and tune on the bumper on wed. and friday nights. You need to look else where for traction !
BTW. The pics below are from osw on a tnt night.

slolt1

iTrader: (75)

same size tire here and i run 13-15

gator's 99TA

iTrader: (2)

and what do you 60'?????????

onfire

iTrader: (17)

Same day 3800ish race weight auto foot brake. 325 15's 18 psi gave me three 1.8's. 15psi dropped it to 1.69

LS1Queen

iTrader: (1)

we have ran 245's 275's and 325's all with high pressure through are experience radials do not like low air pressure we have been a best of 1.322 60ft on bone stock suspesion as it came from the factory with 22psi now we have almost a full suspension set up we are having problems keeping it off of the rear bumper at 22psi.

LS1Queen

iTrader: (1)

How are your burn outs? Big and smokey?

onfire

iTrader: (17)

About 5 seconds...just enough to see smoke in both side mirrors.....and on an unprepped street night track.

Unstang

iTrader: (26)

I wish I saw this thread a few days ago! I can't wait to go back to the track!

bigdsz

iTrader: (1)

I talked to MT about about burnouts with their DR's and they told me that little or no burnout is required. They said that under no circumstances should the tire be heated to more than 20* above the ambient temperature of the track surface. From what I gather is that the tire compound becomes plastic and grips less.

slolt1

iTrader: (75)

hey it is just a stock lt1 car, but my best 60 was droping the clutch at 4000 and it went a 1.73 on motor.
thanks brad

ChevPower

iTrader: (8)

This would be correct me and the queen have been running the MT radials for a while and they like very little burn outs get them hot and smokey and most of the time they will spin.

1QuickT-A

iTrader: (12)

I dont know.. a local guy by the name of Chris Parker who works for OAKLEY knows the creator of the M/T DR personally.. He said that they told him the tires needed a good burnout almost the same as a full slick.

We do a good smokey burnout on the MT DRs and we run 13-15lbs in them.. Thats on a Malibu that runs 6.90s with 1.5 short times and a Mustang that runs 6.80s with 1.5 short times. My friends run anywhere from 13-18lbs on their fbodys that pull 1.5 shortimes as well. We have tried running them at 18+psi and they do not hook for ****.. Maybe its the track, but they definately like the pressure around 15psi from what I can tell..

gator's 99TA

iTrader: (2)

no offense but a 6.90 car should pull 1.5 60' easily. esp if its at an 1/8th mile track. those guys are all about the launch.

i dont even consider you leaning on this tire untill you are going 1.45 60' or better.

skinnies

iTrader: (33)

I agree, I'm dead hooking to mid 1.5x's with soft launches on the 17's.