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The Terminator
Suspension Modifications
Drag Racing IRS In-Here, Need tips
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<blockquote data-quote="bubblehead93" data-source="post: 14849892" data-attributes="member: 96609"><p>what are you running for rear shocks and springs?</p><p></p><p>what sort of burnout are you doing? tire pressure goes up with the burnout... so you may be starting with cold 12 psi and ending up somewhere north of that... you need to figure out how much heat the tire needs for grip, the burnout that will give you that heat, how much pressure that burnout adds to your tire due to the heat, what the optimum tire pressure at launch is, and then start at a pressure which will give you your optimum tire pressure after the burnout, i.e. start at 13# to get 15# after the burnout...</p><p></p><p>are you hopping the rear end at all once it hooks?</p><p></p><p>the right tire with the right pressure and a good shock in the rear to help in weight transfer... I launch at 3.8K to 4.0K... I used to have a similar problem until I switched to a Hoosier 28" drag slick and the right tire pressure (12# cold)... just completed changed my setup to QA1 DA coil-overs front and rear after grenading a questionable set of stock rear half-shafts (good deal, too good I guess)... have DSS half-shafts now, just need to get the car back to the track... I was running H&R race springs and MM MM2 dampers all the way around, the dampers really limited my weight transfer to the rear... I now run a auto-x coil-over setup with the MM struts and shocks and have fitted the QA1 front/rear coil-over setup for drag racing... recent typhoon out here took away this weekend to take the car to the track with the new suspension...</p></blockquote><p></p>
[QUOTE="bubblehead93, post: 14849892, member: 96609"] what are you running for rear shocks and springs? what sort of burnout are you doing? tire pressure goes up with the burnout... so you may be starting with cold 12 psi and ending up somewhere north of that... you need to figure out how much heat the tire needs for grip, the burnout that will give you that heat, how much pressure that burnout adds to your tire due to the heat, what the optimum tire pressure at launch is, and then start at a pressure which will give you your optimum tire pressure after the burnout, i.e. start at 13# to get 15# after the burnout... are you hopping the rear end at all once it hooks? the right tire with the right pressure and a good shock in the rear to help in weight transfer... I launch at 3.8K to 4.0K... I used to have a similar problem until I switched to a Hoosier 28" drag slick and the right tire pressure (12# cold)... just completed changed my setup to QA1 DA coil-overs front and rear after grenading a questionable set of stock rear half-shafts (good deal, too good I guess)... have DSS half-shafts now, just need to get the car back to the track... I was running H&R race springs and MM MM2 dampers all the way around, the dampers really limited my weight transfer to the rear... I now run a auto-x coil-over setup with the MM struts and shocks and have fitted the QA1 front/rear coil-over setup for drag racing... recent typhoon out here took away this weekend to take the car to the track with the new suspension... [/QUOTE]
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