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Lowering springs and suspension travel. You ARE hitting the bumpstops.

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Old Oct 16, 2011, 04:54 PM
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Originally Posted by USCGSAM
Great reading material>!
THANK you. great stuff.
Old Jan 24, 2012, 09:36 PM
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just read this whole thread. good read for sure. im interested in springs as well and gtworx sound pretty good. i would like to do shocks too, but brand new bilsteins are like 500 bucks each on lancershop. im not cheap when it comes to cars, but there is a limit to what i'll spend. any better prices on new shocks or do i have to look for used? do they have to be rebuilt for gtworx springs to get best performance?

i know, i got a lot more reading to do.
Old Jan 24, 2012, 10:10 PM
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get them from drew at GTWorx for a lot less then that.

I just got the GTWorx stage 1 (my label, drew calls it "must haves") installed and let me tell you it's crazy.

I've got the whiteline 24 on full stiff and it stays flat and over steers on demand. beautiful. complyetrely superior to stock.
Old Jan 25, 2012, 06:10 AM
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Originally Posted by Throttle
just read this whole thread. good read for sure. im interested in springs as well and gtworx sound pretty good. i would like to do shocks too, but brand new bilsteins are like 500 bucks each on lancershop. im not cheap when it comes to cars, but there is a limit to what i'll spend. any better prices on new shocks or do i have to look for used? do they have to be rebuilt for gtworx springs to get best performance?

i know, i got a lot more reading to do.
A brand new set of Bilstein HD struts should run you in the $700-800 range for all 4. I paid ~$740ish for mine from TireRack a few years ago.

l8r)
Old Jan 25, 2012, 08:22 AM
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Got my Bilsteins from eshocks. Much happier with the ride quality over kyb. Have mine paired with spec Rs. I also cut over 2" off each bumpstop. Just left enough to support the dust boots. The Bilstein literature says there is an internal bumpstop.
Old Jan 25, 2012, 08:39 AM
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Originally Posted by bhmax
Got my Bilsteins from eshocks. Much happier with the ride quality over kyb. Have mine paired with spec Rs. I also cut over 2" off each bumpstop. Just left enough to support the dust boots. The Bilstein literature says there is an internal bumpstop.
this I did not know.
Old Jan 25, 2012, 11:52 AM
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thanks to all. looks like there are much better deals out there. i'll look into what you guys said when i get my springs.
Old Jul 6, 2012, 04:31 AM
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Question: I am getting ready to install a set of Bilstein HD's and Swift Sport springs. I am also installing Ralliart strut tops. Do I need to cut the bumpstops? If so how much do I need to cut?
Old Jul 6, 2012, 07:53 AM
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Think of a suspension install as a trial and error or test and fit process. Put it all together without the bumpstops and just half tighten the 2 strut bolts. Set the car down on its wheels and measure your gap by putting a zip tie on the strut and jouncing the a little once its down.

Jack it back up and see where you're at. The bump stop should be short enough not interfere at all with this test.
Old Jul 10, 2012, 10:52 AM
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I like that pointer Dallas. As a reference for Spec R springs, I had originally cut off all but about 1" on the front. Even then, upon compression it would still jam the bumpstop/dust sleeve into the spring mount. While installing my Noltec plates I trimmed off another half inch. Just enough now to support the dust sleeve. I'll see if it still pushes that far up the next time I jack the car up.
Old Jun 23, 2013, 11:33 AM
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Originally Posted by bhmax
I like that pointer Dallas. As a reference for Spec R springs, I had originally cut off all but about 1" on the front. Even then, upon compression it would still jam the bumpstop/dust sleeve into the spring mount. While installing my Noltec plates I trimmed off another half inch. Just enough now to support the dust sleeve. I'll see if it still pushes that far up the next time I jack the car up.
Shame he was a low poster. Anyone tried it?
Old Oct 24, 2013, 02:14 PM
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I'm not sure how much of my bump stops are left. I bought the car already lowered. From what I was told, they are Tein S-Tech springs on stock 9 struts, MR's I think, if those are different I don't know.
I'm thinking about getting a new suspension setup after I get my engine built. Considering the Eibach HD's people keep talking about with the spec r's and whiteline bars. I realize I'll also have to get the Roll Center Kit too.
I really like how my car rides right now, but it could be a little bit higher and give me a bit more ride height and comfort that I wont obliterate my front bumper on dead animals and such on the interstate. The car could definitely handle better though. It pushes really bad now, though its confidence inspiring through sweepers. Some of the push could be that I have my stock wheels on and have yet to drive the car with good grippy tires..
Old Jul 13, 2015, 06:43 PM
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Cutting the bumpstops is an option, but it does have it's drawbacks. They're progressive....so cutting them means the impact when you do hit them (which you will) is going to be more abrupt and probably not pleasant. You do need the bumpstops there for those times when you DO bottom out the damper (which is obviously more likely when you lower the car 1.5 inches).
I've worked with an EvoVIII in the past, my recollection is that there was an external bump stop around the inverted strut tube but also an internal bump stop of 60-70mm long. It's this secondary internal stop that can be shortened although it's obviously not very accessible for fine-tuning adjustment.

With other strut cars I've worked on, a 25-30mm bump stop with 6-9mm solid Delrin or UHMW packer have provided enough protection at full compression. This is particularly useful when you've raised the spring rates enough to not have to use the bump stops all the time. For a closer-to-stock sprung setup, like Swifts or OE, going to about 35-40mm bump stop length (and making sure the stop has a linear profile) will keep a neutral handling balance without sudden understeer rearing its ugly head!
Old Jul 28, 2015, 12:51 AM
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So if bump stops are getting hit how far away are we then from bottoming out the shock? We suspect we have killed a set of brand new bilsteins in a few thousand miles with specR springs 😤
Old Oct 23, 2022, 02:02 PM
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So what’s the consensus, should you cut the bump stops when installing lowering springs?


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