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Old 03-01-2011, 02:36 PM   #16
Rotary Evolution
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i'm not sure about the verts but the best bang for the buck to reduce wheel hop in the coupes is a pinion snubber, which costs about $7 and takes about 45 minutes to install, most of that spent removing the bins to get a drill into the center tunnel area above the nose of the differential.

this also helps keep your $180 differential mount from ripping under the stress of wheel hop.

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Old 03-04-2011, 09:59 PM   #17
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The 91 convertibles came with a 4.10. Info direct from the 1991 sales brochure.
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Last edited by rotarydream; 03-04-2011 at 10:03 PM..
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Old 05-13-2011, 06:33 AM   #18
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'90 GTUs
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Old 01-01-2012, 07:46 PM   #19
The quest for more torque
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I found that reducing the negative camber on the rear wheels reduces tire spinning on launch dramatically and seems to improve wheel hop. Launch acceleration measurements:

Stock suspension height: 0.93 gs max
Lowered 0.9" (Eibach springs, -1.8deg and -2.7deg): 0.87 gs max
Lowered 0.9" Camber corrected to -0.9deg and -1.6 deg: 0.93 gs max

This is using the stock size tires on a similar day (obviously not the same day).

I can still get axle hop, but it is only if a drop the clutch abruptly with the engine at 2000-4000 rpm and the throttle partially closed. Without camber correction, the axle hop was a problem on a hard launch, now it just squats and goes.
1986 GXL ('87 4-port NA - Haltech E8, LS2 Coils. Defined Autoworks Headers, Dual 2.5" Exhaust (Dual Superflow, dBX mufflers)
1991 Coupe (KYB AGX Shocks, Eibach lowering springs, RB exhaust, Stock and Automatic)
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