Does anyone know if you have to cut the bump stops when installing the ark GT-F springs?
IF so how much? I was hoping to install these things today but just wanted to be sure.

 

shouldnt have to cut anything, how low are you going?

 

Well they are comparable to sportlines and I know that sportlines say to cut them so I just wanted to find out.

 

i just bought sportlines and everyone i talked to said not to cut the bumpstops or your shocks will get fucked up

 

Yeah, okay. If you want to hit the bump stop every time you run a pebble over.

Seriously, the directions say to cut it, I think Eibach and other companies look into this before they tell you to cut them.

 

X2 don't cut the bump stops

 

Rather hit the bumpstop than bottom out the strut myself....but I'm not paying for your struts so meh.........

 

I was actually curious about the same thing (although I'm installing my sportlines tomorrow, not arks). I know that the reason to cut bump stops is so that you don't bottom out all the time, but really isn't that what the bump stops are for? If you bottom out, they absorb the impact instead of the struts bottoming out and eventually failing, right?

I'm leaning toward leaving them alone, and if I find I bottom out excessively, maybe I'll trim a tiny bit to try to reach a happy medium.

 

dont cut them.

for god sakes, use some common sense!!!

 

I hate this issue. No one really knows, and anecdotal evidence isn't sufficient. One thing for sure is that this is dependent upon the rate of the spring, the travel of the strut used, the intended application, and the weight of the car, and people don't seem to be taking all these factors into consideration.. probably because there's too much unknown.

The bump stop needs to be short enough not to affect the suspension significantly in the application range.

The bump stop needs to be long enough to prevent coil bind and bottoming out the strut.

If Eibach says cut them, I believe they did research and have it so you're cutting off enough that you're not hitting them 24/7 but also so your struts aren't blown after 6 months.

I'll trust Eibach over some crack-pot-jackass who is going to tell me not to cut them, with zero evidence. I've been running mine cut to specifications from Eibach since I got my car and my seals are not blown. My shocks and struts are in 100% working order.

The choice is yours.

Also, let me add that it's a pretty general rule of thumb that 1/2 to 3/4 of an inch of bump stop removal does not equal blown shocks and to get the most out of your springs, you generally have to trim the bump stops.

Manufacturer > you.

 

GM built my car, Eibach built yours???? Coooool

 

Legitimate point you have there. I can see you picked the easiest thing for your pea-size brain to comprehend and then proceed to criticize me about it. When you have something intelligent to add, then I suggest coming back.

Did GM manufacturer your lowering springs?

 

bump stops in these cars are used for not only a travel limit but also also as a rate-adder.

just like they use a progressive step for both ride and payload, the jounce bumper is used in conjecture to met both targets.

damper travel Vs bumper length leaves with with ~1/4in more bumper then travel, however in high speed events, when the valve stack has blown off, that extra bit of bumper is vary helpful at keeping the damper out of a crash.

 

bump stops in these cars are used for not only a travel limit but also also as a rate-adder.

just like they use a progressive step for both ride and payload, the jounce bumper is used in conjecture to met both targets.

damper travel Vs bumper length leaves with with ~1/4in more bumper then travel, however in high speed events, when the valve stack has blown off, that extra bit of bumper is vary helpful at keeping the damper out of a crash.

 

bump stops in these cars are used for not only a travel limit but also also as a rate-adder.

just like they use a progressive step for both ride and payload, the jounce bumper is used in conjecture to met both targets.

damper travel Vs bumper length leaves with with ~1/4in more bumper then travel, however in high speed events, when the valve stack has blown off, that extra bit of bumper is vary helpful at keeping the damper out of a crash.

 

bump stops in these cars are used for not only a travel limit but also also as a rate-adder.

just like they use a progressive step for both ride and payload, the jounce bumper is used in conjecture to met both targets.

damper travel Vs bumper length leaves with with ~1/4in more bumper then travel, however in high speed events, when the valve stack has blown off, that extra bit of bumper is vary helpful at keeping the damper out of a crash.

 

I ended up not touching the bump stops. Everything turned out great, the drop is sexy!!
I have yet to hit the bump stops hard while going over bumps so I would say that it is not neccessary for these springs.