Eibach Sportlines

[Terminator2]

Has been posted before. The bumpstop in the front should not be cut with the eibach kit they were designed to be part of the total spring rate at ride height, many cars are set up like this. We are not talking about a lifted jeeps of f250s here. People should really research before they post up incorrect info.

Call it incorrect if you want but no matter the application riding on bumpstops should never be acceptable as that is not their intended function. Coil springs support the weight of the vehicle, shocks dampen spring harmonics, and bumpstops help stop overcompression or over uptravel of shocks, suspension components and prevent tire to body contact. They are not intended to support vehicle weight which mine were doing.

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[cbrtrx]

Call it incorrect if you want but no matter the application riding on bumpstops should never be acceptable as that is not their intended function. Coil springs support the weight of the vehicle, shocks dampen spring harmonics, and bumpstops help stop overcompression or over uptravel of shocks, suspension components and prevent tire to body contact. They are not intended to support vehicle weight which mine were doing.

I dont won't to argue with you, just trying to spread correct info. If you took the time to research you'll understand its extremely common for the bumpstop to sit like that in certain applications and be part of the suspension systems total spring rate at ride height. Ever thought why certain bump stops are shaped the way they are?... They do way more then just limit travel. This isn't 1980 anymore and we aren't talking about lifted jeeps.

 

[Doctor Fishtail]

Call it incorrect if you want but no matter the application riding on bumpstops should never be acceptable as that is not their intended function. Coil springs support the weight of the vehicle, shocks dampen spring harmonics, and bumpstops help stop overcompression or over uptravel of shocks, suspension components and prevent tire to body contact. They are not intended to support vehicle weight which mine were doing.

^^^This is correct. Bump stops are for exactly what you stated for over compression. Basically to keep your shock/strut from death.

 

[cbrtrx]

^^^This is correct. Bump stops are for exactly what you stated for over compression. Basically to keep your shock/strut from death.

I guess might as well just cut them in half then! Ignorance is bliss.

I don't even know why I try on this site... hahaha, it's a waste of my time.

 

[Doctor Fishtail]

I guess might as well just cut them in half then! Ignorance is bliss.

I don't even know why I try on this site... hahaha, it's a waste of my time.

Before you call someone ignorant you just might want to stare in the mirror. Would love to race you at an autocross event. You would look real funny rolling around on your bump stops. :lol:

 

[cbrtrx]

Before you call someone ignorant you just might want to stare in the mirror. Would love to race you at an autocross event. You would look real funny rolling around on your bump stops. :lol:

Hahahahaha, you have no idea. Enjoy your car.

 

[markmurfie]

Eibach include replacement bump stops with the sportline springs. The install instructions did not say cut or even check to see if the car was riding on the bump stop. With that being said I know bump stops are used for more than just prevention of bottoming out the shock. I will not be cutting my bump stop that I got from eibach. Eibach factors in their bump stops into their advertises spring rates. If they told me to reuse the oem bump stops then I would consider cutting them.
http://eibach.com/m-america/en/eibach-news/ford-mustang-2015-plus-sportline

10mm of bump stop factored into final rate.

Different vehicle entirely but installing replacement bump stops for my 2003 Silverado the instruction were to adjust the torsion bars until the frame was just barely touching the bump stops. When ever I had the torsion bars set higher the ride was very bouncy.

While it may not be as noticeable in a lighter car I imagine the same forces would be at play on your springs if you removed part of the bump stop the springs were designed around.

 

[cbrtrx]

Eibach include replacement bump stops with the sportline springs. The install instructions did not say cut or even check to see if the car was riding on the bump stop. With that being said I know bump stops are used for more than just prevention of bottoming out the shock. I will not be cutting my bump stop that I got from eibach. Eibach factors in their bump stops into their advertises spring rates. If they told me to reuse the oem bump stops then I would consider cutting them.
http://eibach.com/m-america/en/eibach-news/ford-mustang-2015-plus-sportline

10mm of bump stop factored into final rate.

Different vehicle entirely but installing replacement bump stops for my 2003 Silverado the instruction were to adjust the torsion bars until the frame was just barely touching the bump stops. When ever I had the torsion bars set higher the ride was very bouncy.

While it may not be as noticeable in a lighter car I imagine the same forces would be at play on your springs if you removed part of the bump stop the springs were designed around.

This is all very correct, the bump stops in this kit were designed to be installed with a certain amount of deflection to give final spring rate at ride height, it also helps to tune the dampening to the new lowered set up. Not sure why people argue this when the info is readily available. I also time all if any rubber suspension bushings to the new ride height as well to ensure proper preload. I've been tuning automotive suspensions since 1993 though so I've learned some things over the years.

But if you guys want to cut your stops, cut away!

 

[Doctor Fishtail]

Just got off the phone with tech support Eibach. And they stated that cutting bump stops 3/4" is totally acceptable.

 

[dubster99]

Acceptable, but not necessary. I'm sure the engineers at eibach know more than the people on this site.

 

[Doctor Fishtail]

Acceptable, but not necessary. I'm sure the engineers at eibach know more than the people on this site.

That is exactly why I called them. ;)

 

[cbrtrx]

Just got off the phone with tech support Eibach. And they stated that cutting bump stops 3/4" is totally acceptable.

Just like the 3 alignment shops you went to that didn't know the rear camber was adjustable, surely they would know! ;)

Some people are just stubborn.

 

[Doctor Fishtail]

Just like the 3 alignment shops you went to that didn't know the rear camber was adjustable, surely they would know! ;)

Some people are just stubborn.

Call Eibach. They will explain. We are tired of explaining. :headbonk:

 

[cbrtrx]

Call Eibach. They will explain. We are tired of explaining. :headbonk:

Explain what? How you are wrong? It even says on their website there should be 10mm of deflection, clearly you didn't read that or the other 30 articles online explaining why certain bumps stops are set up that way.

Just like the alignment shops that you went to that have no clue about this car either do you. :lol:

Like I said enjoy you cut stops all you want, I just hate when people try to spout off bad info as fact when they don't know what they're talking about.

 

[Terminator2]

Eibach include replacement bump stops with the sportline springs. The install instructions did not say cut or even check to see if the car was riding on the bump stop. With that being said I know bump stops are used for more than just prevention of bottoming out the shock. I will not be cutting my bump stop that I got from eibach. Eibach factors in their bump stops into their advertises spring rates. If they told me to reuse the oem bump stops then I would consider cutting them.
http://eibach.com/m-america/en/eibach-news/ford-mustang-2015-plus-sportline

10mm of bump stop factored into final rate.

Different vehicle entirely but installing replacement bump stops for my 2003 Silverado the instruction were to adjust the torsion bars until the frame was just barely touching the bump stops. When ever I had the torsion bars set higher the ride was very bouncy.

While it may not be as noticeable in a lighter car I imagine the same forces would be at play on your springs if you removed part of the bump stop the springs were designed around.

Cranking up torsion bars increases their rate exponentially so of course the ride was bouncy. Not even close to the same scenario. I read about 10mm of bumpstop being factored into the highest end of the variable rate but they meant the last 10mm of compression of the coil springs right before they would go solid and the bumpstops in the kit are far longer than 10mm even cut down.

Car rides much better once I cut the front stops especially. It's less harsh and bouncy.

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