LOSING TIME AT THE LINE

[JEFF69Z28]

AM I HURTING MY 60 FOOT WHEN MY TIRES WRINKLE.THEY HAVE ABOUT 3-4 WRINKLES WHEN I LAUNCH THE CAR.M/T SLICKS WITH 13.5 LBS AIR,I SEEN ANOTHER ARTICLE ABOUT TIRE SHOCK ON HERE WITH PICTURES OF THE CAR(RED WILLY'S)AND MY TIRES ARE MORE WRINKLED THAN THE ONES ON THAT CAR.

[bjuice]

what Size Tire...Sounds like a Lot of Air pressure...i run a 33x10.5 and only have 9lbs before burnout

[JEFF69Z28]

28X9X15 M/T SLICKS

[johnracer]

I'd say tire pressure is about right and might try a little more. Small tires like more pressure. I ran 14-15lbs in my low 11 sec Nova with 28x9 Mickeys. Most stock eliminator guys run every bit of that and more......are you hurting your 60 ft with the wrinkles? Probably not, but you might bump the pressure up a little and see what your 60's do.
Johnny

[bjuice]

How much does car weigh ?...one thing for sure the more Air you can run without blowing them off the faster and more stable the car will be.

Please understand Tire pressure is A fine tunning effort, much like the 4 link..it doesn't take much adjustment either way to see results....so when your experimenting with the pressure..1/2 lbs at a time...is safe...and when you get close 1/4 lbs count...( digital gauges are best for accuracy)

check the pressure while your in stagging just before your Run....DO NOT check them and let it sit there in the SUN...block the tire from the sun.

[BEAST477]

How much does car weigh ?...one thing for sure the more Air you can run without blowing them off the faster and more stable the car will be.

Please understand Tire pressure is A fine tunning effort, much like the 4 link..it doesn't take much adjustment either way to see results....so when your experimenting with the pressure..1/2 lbs at a time...is safe...and when you get close 1/4 lbs count...( digital gauges are best for accuracy)

check the pressure while your in stagging just before your Run....DO NOT check them and let it sit there in the SUN...block the tire from the sun.

You also might want to compare your gauge to a couple others for accuarcy. I bought a new high quality gauge (I thought) and found it to be off by 5.5lbs :evil: Well figured out why the car wouldn't hook any more. Just a thought.

[andybyrd]

Jeff their right about the air presure. I had a 69 chevell that was a 6.40 1/8 mile car and it had M/T 10.5x 29's with a 5.13 gear and no one could drive that car all out with less than 14 pounds of air in them 13.5# all over the track, 14# you could run it down the track with your little finger.
I called Mickey T and they told me to start at 18# and work down 1/2 # at a time to where you had great traction it and ran straight. my majic # was 14. but they are all different. my 14x32 M/T's on my new car 8# .Always remember though let off the gas and run it again if it aint straight somethings wrong. Be SAFE,
Andy

[JEFF69Z28]

How much does car weigh ?...one thing for sure the more Air you can run without blowing them off the faster and more stable the car will be.

Please understand Tire pressure is A fine tunning effort, much like the 4 link..it doesn't take much adjustment either way to see results....so when your experimenting with the pressure..1/2 lbs at a time...is safe...and when you get close 1/4 lbs count...( digital gauges are best for accuracy)

check the pressure while your in stagging just before your Run....DO NOT check them and let it sit there in the SUN...block the tire from the sun.
car is 3385 with me in it,86 ss monte carlo,sbc,10.30's 1/4 mile.

[itsabird]

have you had any chassis modifications made to the car?

[JEFF69Z28]

8 POINT CAGE WELDED TO FRAME,DOUBLE ADJUST UPPER CONTROL ARMS,SOLID LOWER CONTROL ARMS.AIR BAG ON PASSENGER SIDE.

[itsabird]

it's possible, but unless your control arm bracket have hole that make them adjustable, your ic height and distant are pretty well set, having adjustable shock would help in that you could control the rate the body and chassis seperated, by stiffening rebound, absent shock as has been stated, air pressure is your best bet, a few wrinkles is not a bad thing, shows you are hooking, prob occurs when tire is smashed so hard that when it returns to round, it forces the tire out of the track. hope this help and good luck. mho

[jamesbaughan]

Every car is different. My 70 Camaro with 29x11x15 Hoosier slicks like 18 psi. I have 1.52-1.54 at 18 and 1.58-1.60 at 16.5. Try more and see.

[fla1976]

You might want to try a tire with a stiffer wall.