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View Full Version : Cut bump stops on coilovers??



wesleyfbm
06-24-2009, 11:13 PM
My ST coils just arrived today and have seen in a couple threads of ppl cutting down their bump stops...is this nessecary? i mean i dont plan on being silly low but should i still do this...if so how much?

thanks

biketsai
06-24-2009, 11:17 PM
I wanna do this too, I guess I kinda know how to do it, but does anyone have pics?

auditech79
06-25-2009, 12:27 AM
Its best to cut the bump stops. The stasis (koni) coilovers i had for my S4 said right in the instructions to cutt at least 1/2 of it off. I never bottomed out so i guess it worked pretty well.

onemoremile
06-25-2009, 12:36 AM
If you cut them don't cut them too short. You're always better off bottoming on the bump stops then bottoming out the shock piston.

The ST's have reasonably stiff springs so if you aren't dumping it then you shouldn't ever bottom out.

biketsai
06-25-2009, 12:41 AM
EX
http://farm1.static.flickr.com/202/459140084_15e707874d.jpg?v=0
http://www.mpedrick.net/gallery/albums/KONI-Install-Pics/sm_00_STRUTS_worn_bump_stop.jpg

wesleyfbm
06-25-2009, 08:17 AM
so whats the verdict...cut like 1/4 off?

Lazer Viking
06-25-2009, 12:20 PM
i cut mine right in half, where that groove is.. but im pretty low and i still havent bottomed them out

biketsai
06-25-2009, 12:31 PM
i cut mine right in half, where that groove is.. but im pretty low and i still havent bottomed them out

Nice, I guess I need to do that! Would you say the ride is more comfortable?

VirginiaBeachA4
06-25-2009, 01:28 PM
so, you all might not like this but remember beauty is in the eye of the beholder and each person does things to their likings. so with that said, i plan on going stupid low. like 3-4" of the ground low, how much bump stop would i have to cut off?

keeganhartman
06-25-2009, 02:11 PM
I'm around 3 inches right now maybe a tad more on the STs and have yet to bottom out.. without any cutting of the bump stops

Lazer Viking
06-25-2009, 03:08 PM
Nice, I guess I need to do that! Would you say the ride is more comfortable?

well, my car is 22.5" ground to fender, and i have 35 series tires, so comfortable is a relative term.. but i would say that my car rides pretty good for as low as it is
http://farm4.static.flickr.com/3559/3506084402_cb342b5265.jpg?v=0

wesleyfbm
06-25-2009, 04:38 PM
so uhhhhh im gunna cut mine in half i think. what did yall use to make a clean cut?

dcampana
06-25-2009, 04:42 PM
well, my car is 22.5" ground to fender, and i have 35 series tires, so comfortable is a relative term.. but i would say that my car rides pretty good for as low as it is
http://farm4.static.flickr.com/3559/3506084402_cb342b5265.jpg?v=0

dude I LOVE your car... man[hail] sooo low too

biketsai
06-25-2009, 04:57 PM
dude I LOVE your car... man[hail] sooo low too

X2, I cant even imagine trying to drive your car.

If I cut the bumpstop, wont the tire be more likely to rub the fender now??

Lazer Viking
06-25-2009, 05:57 PM
X2, I cant even imagine trying to drive your car.

If I cut the bumpstop, wont the tire be more likely to rub the fender now??

do you hit the bump stops now ?


i just used a hacksaw to cut mine, they are only a soft foam

Kyle H
06-25-2009, 07:30 PM
I used a table saw to cut the straight part off of mine (~1/2")... wouldn't recommend the table saw, it was a little sketch. It worked though!

onemoremile
06-25-2009, 09:43 PM
so uhhhhh im gunna cut mine in half i think. what did yall use to make a clean cut?

I put them in the vise just tight enough to hold them and then use a sharp knife (long bread knife) to slice across the tops of the vise jaws. Just set them up and cut them up. Be sure to look at which end goes into the upper strut perch before cutting.

wesleyfbm
06-27-2009, 09:22 AM
so here is the front one. should i just cut the actual yellow part in half??

http://i488.photobucket.com/albums/rr243/wesleyfbm/001-7-1.jpg

.Mad Hatter.
06-27-2009, 09:55 AM
whats the advantage of cutting the bump stops?

wesleyfbm
06-27-2009, 10:14 AM
less of chance to bottom out...get more clearnace with less bumpstop.

biketsai
06-27-2009, 11:59 AM
Hmm, I feel like I hit them occasionally but my suspension is rather stiff at the same time. For as low as I am 24.5" gtf I have never rubbed on the street or even after 3 track events.

.Mad Hatter.
06-27-2009, 12:56 PM
meh im over 25" GTF, im good, lol.

speedydragon
06-27-2009, 02:16 PM
How do you know when you bottom out? How does it feel like? thanks!

Lazer Viking
06-27-2009, 06:52 PM
you'll know it

speedydragon
06-27-2009, 07:48 PM
^ so it's kind of like a blown turbo? Sound can't really be explained but you'll know it when it happens? :| haha I hate those answers :P

biketsai
06-27-2009, 09:04 PM
^ so it's kind of like a blown turbo? Sound can't really be explained but you'll know it when it happens? :| haha I hate those answers :P

Lol, well you just kinda haev to experience it. It almost feels like hitting a REALLY bad pothole.

Lazer Viking
06-28-2009, 06:42 AM
if some one were to take hammer, and smack the inner fender... im pretty sure it would sound about the same

wesleyfbm
06-28-2009, 08:58 PM
so how do i get the black boot off my front bumpstops on the ST coils?....they are in the groove pretty good and dont want to crack the plastic.

onemoremile
06-28-2009, 09:02 PM
Pull, twist, and pry. A little lubrication helps.