GT Performance Mods 2005+ Mustang GT Performance and Technical Information

Lowered cars, how much rear travel?

Old Sep 14, 2006 | 01:58 PM
  #1  
Shea's Avatar
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Lowered cars, how much rear travel?

I lowered my car via cutting 2 coils off the rear springs and 1 off the front.

When I put my BMR LCAs on recently I noticed that there was barely any room between the rubber bumper on top of the axle and the frame.

That means that in the back there is almost no suspension travel. Has anyone else noticed this with either cut springs or kits?
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Old Sep 15, 2006 | 06:01 PM
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Originally Posted by Shea
I lowered my car via cutting 2 coils off the rear springs and 1 off the front.

When I put my BMR LCAs on recently I noticed that there was barely any room between the rubber bumper on top of the axle and the frame.

That means that in the back there is almost no suspension travel. Has anyone else noticed this with either cut springs or kits?
Yup. Cut the top nub off of the bumpstop. Saleen does this, and I think Roush and Steeda may, too.

I used a hacksaw blade and it took a few seconds per side. I'm sort of surprised the aftermarket spring kits don't come with new, shorter bumpstops.
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Old Sep 18, 2006 | 09:18 PM
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When Installed the roush suspension it came with new stops
New one is on the left
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Old Sep 21, 2006 | 07:26 PM
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When you lower any car you give up bounce travel. That is the down side and a fact of life. If the car starts out with 3" bounce travel and you lower it 1 1/2", you only have a 1-1/2" bounce travel left. Rebound wise you will have more than you ever dreamed. Shortening the pinion snubber pad will help a little, but you wil never get what you gave up back (w/o spending some serious money).

The coil cut gets you the drop, and by removal of coils it increases the wheel rate, but not as much as the wheel rate you would get with springs designed to lower the car. That extra rate being there to compensate for the less suspension travel.
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Old Sep 23, 2006 | 06:30 PM
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I simply cut that top **** off the stock bump stops.

Richard
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Old Sep 24, 2006 | 06:51 PM
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After cutting one coil off the rears, I have bumped the stops several times. I'll be under there with a hacksaw the next chance I get. Sounds like an easy fix.
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Old Sep 26, 2006 | 08:06 PM
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I have the FRPP handling package on my convertible and I trimmed the frist "nub" off the rubber cushion and it still bottoms out fairly often when hitting a bump.

Any alternative fixes?
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Old Sep 26, 2006 | 09:14 PM
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Originally Posted by ponyent
I have the FRPP handling package on my convertible and I trimmed the frist "nub" off the rubber cushion and it still bottoms out fairly often when hitting a bump.

Any alternative fixes?
You can try to find a shorter bump stop like the Roush one and that might give you some joy, but it won't stop the chassis from bottoming out. You have given up a 1-1/2" of bounce travel (design is about 3.5" so you may be down to 2.0" now) or so and it won't come back w/o serious surgery to the chassis, or raising the car back up. Uprated shocks can help some as well, but won't be the cure all. Presumably the FRPP ones you got with your kit are bumped up already.

Only other thing you can do is read the road better and miss or slow down before encountering the short choppy bumps, or the big dips.
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