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Progressive Foam Bump Stops

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Old 05-12-09, 10:27 AM   #1
steveski
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Default Progressive Foam Bump Stops

I thought I would share a small discovery with all you non-coilover guys. When you install lowering springs on OEM struts or aftermarket, they recommend cutting the bump stop. I did this and never really thought it was a good idea since it basically means when the strut is compressed under load it will bottom out on the hard bump stop.

I removed the old bump stops and installed these polyfoam bump stops last weekend. I did not cut them. The difference is huge - the foam compresses and progressively adds up to 250 Lbs. at full compression (2' to 2 1/2"). The cut bump stop does the same but it is only when it hits rock bottom and it gives you the big jolt.

I thought it was a decent intervention at $20 per pair. Since I run Bilstein HD's and use lowest perch with H&R's, these are particularly effective - no more hard bottoming out. Here is pic from JC Whitney:
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Old 05-12-09, 03:41 PM   #2
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wow, neat discovery. WIll remember those when I redo my suspension.
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Old 05-24-17, 04:33 PM   #3
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Quote:
Originally Posted by steveski View Post
I thought I would share a small discovery with all you non-coilover guys. When you install lowering springs on OEM struts or aftermarket, they recommend cutting the bump stop. I did this and never really thought it was a good idea since it basically means when the strut is compressed under load it will bottom out on the hard bump stop.

I removed the old bump stops and installed these polyfoam bump stops last weekend. I did not cut them. The difference is huge - the foam compresses and progressively adds up to 250 Lbs. at full compression (2' to 2 1/2"). The cut bump stop does the same but it is only when it hits rock bottom and it gives you the big jolt.

I thought it was a decent intervention at $20 per pair. Since I run Bilstein HD's and use lowest perch with H&R's, these are particularly effective - no more hard bottoming out. Here is pic from JC Whitney:
Interesting.....

I'm in he market for new bump stops. Do you have a catalog number?
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Old 05-24-17, 06:15 PM   #4
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Yes, it's a good idea.
If your springs are really stiff (mine are) you will seldom reach that point, but glad when you do.
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Old 05-25-17, 06:40 PM   #5
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it's an 8+ year old post guys, google to find the part number for whatever size you need, it probably changed since then anyway.
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Old 05-27-17, 02:52 PM   #6
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And how do they fit over all that large stuff? Do they come apart?
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Old 05-27-17, 03:41 PM   #7
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8 years ago they were smart enough to figure it out instead of asking questions...(HEHEHE) just joking diser
if JC Whitney sells it, it must be easy.
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bilstein , bump , bumpstop , cut , daytona , es330 , foam , hd , lexus , ls400 , proggressive , progressive , prototype , stop , stops

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