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2011-2014 Mustangs
Driveline/Suspension
Suspension Tech: Bring It!
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<blockquote data-quote="walt6076" data-source="post: 14786637" data-attributes="member: 170324"><p><strong>GT500 hooks hard for about 20’ and then unloads and spins.</strong></p><p></p><p>Hey BMR Tech can you suggest a course of action? My GT500 hooks hard for about 20’ and then unloads and spins.</p><p></p><p>Here’s the car info: 2008 GT500 with 500 RWHP. Eibach pro kit lower springs and dampers. Steeda tubular rear lower control arms, Steeda adjustable rear upper control arm (not sure which one) set to -1.5 degree driveshaft angle. Aluminum one piece driveshaft. Steeda front and rear sway bars. BMR Suspension lower control arm relocation brackets with LCAs currently using the middle hole. BMR Suspension rear sway bar relocation brackets.</p><p>(The Steeda sway bar and BMR parts didn’t exactly play well together and some grinding on the LCA relo brackets for clearance was required.) </p><p></p><p>15x10 wheels with 28x11.5-15 Hoosier QTP. </p><p></p><p>I can launch as hard as 5000 RPM (or as easy as 3000 RPM) and the car hooks hard but after a few feet, maybe 20', the rear unloads and tires spin. Subjectively it feels like the rear actually bounces up, but that is hard to verify for sure. For sure it does hook and not spin immediately off the line, and then well before my nose reaches the tree I am spinning. </p><p></p><p>I’m open to anything to get the car to hook because I do plan on adding another 150HP once the traction issues are sorted out. The car does see street duty so I don’t want to ruin its road manners but obviously I’m OK with a harsh ride because it is stiff as can be now. And the car never sees really hard cornering because there are no opportunities for that here. LOL.</p><p></p><p>I’m wondering if a different LCA relocation adjustment up or down might help. Or maybe I need different shocks to help keep the rear from bouncing up after launch? Or maybe I need a different upper control arm?</p></blockquote><p></p>
[QUOTE="walt6076, post: 14786637, member: 170324"] [b]GT500 hooks hard for about 20’ and then unloads and spins.[/b] Hey BMR Tech can you suggest a course of action? My GT500 hooks hard for about 20’ and then unloads and spins. Here’s the car info: 2008 GT500 with 500 RWHP. Eibach pro kit lower springs and dampers. Steeda tubular rear lower control arms, Steeda adjustable rear upper control arm (not sure which one) set to -1.5 degree driveshaft angle. Aluminum one piece driveshaft. Steeda front and rear sway bars. BMR Suspension lower control arm relocation brackets with LCAs currently using the middle hole. BMR Suspension rear sway bar relocation brackets. (The Steeda sway bar and BMR parts didn’t exactly play well together and some grinding on the LCA relo brackets for clearance was required.) 15x10 wheels with 28x11.5-15 Hoosier QTP. I can launch as hard as 5000 RPM (or as easy as 3000 RPM) and the car hooks hard but after a few feet, maybe 20', the rear unloads and tires spin. Subjectively it feels like the rear actually bounces up, but that is hard to verify for sure. For sure it does hook and not spin immediately off the line, and then well before my nose reaches the tree I am spinning. I’m open to anything to get the car to hook because I do plan on adding another 150HP once the traction issues are sorted out. The car does see street duty so I don’t want to ruin its road manners but obviously I’m OK with a harsh ride because it is stiff as can be now. And the car never sees really hard cornering because there are no opportunities for that here. LOL. I’m wondering if a different LCA relocation adjustment up or down might help. Or maybe I need different shocks to help keep the rear from bouncing up after launch? Or maybe I need a different upper control arm? [/QUOTE]
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Driveline/Suspension
Suspension Tech: Bring It!
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