coilovers and flared fenders ??
10-30-2014, 09:29 AM
#1
Instructor
Thread Starter
Member Since: Apr 2009
Location: rouen-France
Posts: 210
Likes: 0
Received 64 Likes
on
15 Posts
2015 C5 of Year Finalist
coilovers and flared fenders ??
Hi everybody a little question maybe someone can help me...I have a set of bilstein coilovers and have a little problem...when high speed or too much bump in the road the rear tyre touch the inner fender and it do some brake effect with a Noisy sound....I'am ready to fit 19x12 wheels with wide rear fenders I hope that when I jump the tyres don't destroy my flush fenders ???
someone have already this problem or questions ?
someone have already this problem or questions ?
10-30-2014, 11:04 AM
#2
Instructor
Member Since: Feb 2014
Location: Lees Summit Missouri
Posts: 136
Likes: 0
Received 5 Likes
on
4 Posts
Lets start with some basics. Lowering your car too much with coil overs and oversized tires could result having the tires rub against the inner finders or worse, the outer fender when going over dips/bumps in the road.
Selecting the right size tire that will fit the inner fender is your first priority, next is to select the correct wheel with the correct "off set" so the tire will be centered inside the fender equally on both sides. Shims are fine to use for street and show application, but I would not recommend them if you are a serious racer.
Finally, you need to make certain you have sufficient "preload" set for the coil overs. In other words, you don't want the car to have too much vertical movement when the car encounters a speed dip/bump.
Also, I would highly recommend you have someone with a set of scales, balance the car before you have the car set off to have a good alignment. The objective is to have 50/50 weight bias.
Ray
Selecting the right size tire that will fit the inner fender is your first priority, next is to select the correct wheel with the correct "off set" so the tire will be centered inside the fender equally on both sides. Shims are fine to use for street and show application, but I would not recommend them if you are a serious racer.
Finally, you need to make certain you have sufficient "preload" set for the coil overs. In other words, you don't want the car to have too much vertical movement when the car encounters a speed dip/bump.
Also, I would highly recommend you have someone with a set of scales, balance the car before you have the car set off to have a good alignment. The objective is to have 50/50 weight bias.
Ray
10-30-2014, 11:23 AM
#3
Instructor
Thread Starter
Member Since: Apr 2009
Location: rouen-France
Posts: 210
Likes: 0
Received 64 Likes
on
15 Posts
2015 C5 of Year Finalist
Lets start with some basics. Lowering your car too much with coil overs and oversized tires could result having the tires rub against the inner finders or worse, the outer fender when going over dips/bumps in the road.
Selecting the right size tire that will fit the inner fender is your first priority, next is to select the correct wheel with the correct "off set" so the tire will be centered inside the fender equally on both sides. Shims are fine to use for street and show application, but I would not recommend them if you are a serious racer.
Finally, you need to make certain you have sufficient "preload" set for the coil overs. In other words, you don't want the car to have too much vertical movement when the car encounters a speed dip/bump.
Also, I would highly recommend you have someone with a set of scales, balance the car before you have the car set off to have a good alignment. The objective is to have 50/50 weight bias.
Ray
Selecting the right size tire that will fit the inner fender is your first priority, next is to select the correct wheel with the correct "off set" so the tire will be centered inside the fender equally on both sides. Shims are fine to use for street and show application, but I would not recommend them if you are a serious racer.
Finally, you need to make certain you have sufficient "preload" set for the coil overs. In other words, you don't want the car to have too much vertical movement when the car encounters a speed dip/bump.
Also, I would highly recommend you have someone with a set of scales, balance the car before you have the car set off to have a good alignment. The objective is to have 50/50 weight bias.
Ray
https://www.corvetteforum.com/forums...ed-shocks.html
maybe I'am too low and it's one way coilovers if you lowered you will go soft and raise will go hard...but actually with stock wheels and tyres when take german highway 120/140mph I will have a big scary things when the rear tyres touch inner fender and do some brake effect
10-30-2014, 06:42 PM
#4
Race Director
Member Since: Apr 2007
Location: South Western Ontario
Posts: 11,061
Received 845 Likes
on
721 Posts
The stock shocks also incorporate bumps stops to limit the suspension compression so ensuring the coilovers limit compression before the wheels hit parts would be a good idea.
Even if you install bump stops, too low means not enough travel for the suspension to work and it also messes with the suspension geometry. It seems to be generally accepted that lowering <1" from the stock ride height is best for handling.
Even if you install bump stops, too low means not enough travel for the suspension to work and it also messes with the suspension geometry. It seems to be generally accepted that lowering <1" from the stock ride height is best for handling.
10-31-2014, 04:05 AM
#5
Instructor
Thread Starter
Member Since: Apr 2009
Location: rouen-France
Posts: 210
Likes: 0
Received 64 Likes
on
15 Posts
2015 C5 of Year Finalist
The stock shocks also incorporate bumps stops to limit the suspension compression so ensuring the coilovers limit compression before the wheels hit parts would be a good idea.
Even if you install bump stops, too low means not enough travel for the suspension to work and it also messes with the suspension geometry. It seems to be generally accepted that lowering <1" from the stock ride height is best for handling.
Even if you install bump stops, too low means not enough travel for the suspension to work and it also messes with the suspension geometry. It seems to be generally accepted that lowering <1" from the stock ride height is best for handling.
10-31-2014, 06:03 AM
#6
Race Director
Member Since: Apr 2007
Location: long Island NY
Posts: 17,987
Likes: 0
Received 53 Likes
on
48 Posts
I run 345's on 19" with coils. I will only rub inner on a real good dip in the road. When I ran a heavier alignment it was worse then back to factory specs rarely do I rub. I'm 27.5" from ground to fender lip passenger side and 27.75" drivers. My coils are set to 9.
10-31-2014, 10:56 AM
#7
Race Director
Member Since: Apr 2007
Location: South Western Ontario
Posts: 11,061
Received 845 Likes
on
721 Posts
On the stock shocks it a yellow high density foam type material up inside the shock boot. The shock boot has a metal washer in the top of it that the bumper is against. The top of the shock then comes up and hits into it when you're at the limit of travel.
The coilovers should also have some kind of bumper on the shaft to limit travel.
The coilovers should also have some kind of bumper on the shaft to limit travel.
10-31-2014, 07:42 PM
#8
Instructor
Thread Starter
Member Since: Apr 2009
Location: rouen-France
Posts: 210
Likes: 0
Received 64 Likes
on
15 Posts
2015 C5 of Year Finalist
On the stock shocks it a yellow high density foam type material up inside the shock boot. The shock boot has a metal washer in the top of it that the bumper is against. The top of the shock then comes up and hits into it when you're at the limit of travel.
The coilovers should also have some kind of bumper on the shaft to limit travel.
The coilovers should also have some kind of bumper on the shaft to limit travel.
