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Unread 2018-03-14, 11:13 AM   #1
Scooby24
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Default Cutting bump stops with springs

If I'm dropping down around 1.5", should I be cutting bump stops the same amount? I've never fully understood why the factory would put in bump stops if they could easily be cut down so much without having any other issues. Why were the bump stops limiting travel to begin with? Would 1.5" of additional travel added be an issue?

Is it reasonable to assume that with increased spring rates, the amount of expected travel would be less so maybe the bump stop doesn't have to be trimmed the full 1.5"?
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Unread 2018-03-14, 11:38 AM   #2
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On your new fozzy?

I'd be tempted to leave them stock and drive it. If you're contacting them in any scenario less than serious suspension travel/jolts, consider trimming them, then.

I'm not sure how close the shock being fully compressed is to where the bump stop limits you, but I wouldn't want to trim and then start bottoming out your shocks.
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Unread 2018-03-14, 11:43 AM   #3
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Yeah I'm just not sure how much travel this suspension should allow. WRX/STI has pretty shallow travel so most of the time their springs NEED bump stops...on my 2011 the RCE yellows I purchased came with new bump stops that were shorter.

These springs I've installed have no instructions, have no bump stops, and the FXT community is smaller it seems some people cut out of caution, and others didn't. Those who didn't aren't complaining of issues but every now and again you'll get someone who is saying there is weird behavior after hitting a pothole, which may be hitting the bump stop then. So...I'm unsure.
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Unread 2018-03-14, 01:33 PM   #4
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I'd leave them as-is unless and only trim them if you encounter problems.
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Unread 2018-03-14, 01:42 PM   #5
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RS-R got back with me and said they design and test all their springs on the bump stops unmodified so I'm going to assume that's how I should leave them.
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