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Author Topic:   Coil over spring question.
RPM289
Journeyman

Posts: 63
From: Phenix City, AL
Registered: Feb 2002

posted 08-09-2002 11:45 AM     Click Here to See the Profile for RPM289   Click Here to Email RPM289     Edit/Delete Message   Reply w/Quote
How can I identify what rate of spring I have? If it makes any difference mine are white. Also how much air should I run in my M/T Sportsmans size 29x16.5x15? I don't think I should be spinning these with a basicly stock 302, stock convertor and a C4.:confused At the track I had about 10psi and was spinning like crazy. Best 60' was 2.20.

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Mike

66' Mustang,289,4 speed overdrive.
95' Lightning #2218
65' Mustang,Tubbed, Rear cage ladder bars / coil over's, 5.13:1 N-case 9in.31 spline, 302, C4.

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Hemikiller
Gearhead

Posts: 142
From: Clinton, CT
Registered: Feb 2002

posted 08-09-2002 12:27 PM     Click Here to See the Profile for Hemikiller   Click Here to Email Hemikiller     Edit/Delete Message   Reply w/Quote
Sportsmans are more of a streetrod or prostreet tire. For traction they are pretty much useless as a drag tire. You need at least a set of street Dot slicks, like the MT ET/Streets or Hoosier Quick time pro. The pressure you are running sounds low. I'll bet you had very little contact patch. Best way to figure out the correct pressure is to get the tire to whatever temp you would run them at, probably just warm. Then measure the pressure, record it, and do a short burnout. Then look at the marks on the pavement compared to the width of your tires. If it is alot narrower than the tires, then the tire is ballooning in the middle and there is too much pressure. If there are two marks on the outside, and nothing on the inside, then the tire is cupping in the center, and the pressure is too low.

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Moneymaker
Administrator

Posts: 13249
From: Lyons, IL, USA
Registered: May 99

posted 08-09-2002 12:38 PM     Click Here to See the Profile for Moneymaker   Click Here to Email Moneymaker     Edit/Delete Message   Reply w/Quote
Try C&E, Alston, or S&W's webstites ffor srping ID's.

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Alex Denysenko
Co-Administrator and Moderator/ non 65-66 Mustang owner sensitivity co-ordinator

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The Barry of BarrysGrrl

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Just Strokin
Gearhead

Posts: 293
From: Tuscaloosa, Alabama
Registered: Dec 2001

posted 08-09-2002 12:55 PM     Click Here to See the Profile for Just Strokin   Click Here to Email Just Strokin     Edit/Delete Message   Reply w/Quote
get some bathroom scales and compress the spring an inch on top of the scales. this should give you an approximation of the spring rate.

granted this would be hard to do with front springs, but not that difficult with the rear springs.

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RPM289
Journeyman

Posts: 63
From: Phenix City, AL
Registered: Feb 2002

posted 08-12-2002 11:44 AM     Click Here to See the Profile for RPM289   Click Here to Email RPM289     Edit/Delete Message   Reply w/Quote
Thanks for the help guys!! I may go back out Friday if it don't rain. Mabey I will see a 9.50 pass.

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Mike

66' Mustang,289,4 speed overdrive.
95' Lightning #2218
65' Mustang,Tubbed, Rear cage ladder bars / coil over's, 5.13:1 N-case 9in.31 spline, 302, C4.

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