wheel hop when I brake
01-11-2007, 11:21 AM
#3
You have a 12-bolt, which adds a lot of unsprung mass to the car--well beyone what the Bilstein's you have are meant for. From there, LS1's can have a tendency to do that, and TA's usually help, which you have. You also have LCA's, etc.
So, either something is loose, or broken, or everything is normal and the shocks just can't control the mass properly. When you rule out a busted TA or loose mounts, the rear shocks are the next stop.
So, either something is loose, or broken, or everything is normal and the shocks just can't control the mass properly. When you rule out a busted TA or loose mounts, the rear shocks are the next stop.
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01-11-2007, 01:05 PM
#4
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A short length TA that's made for launch bite, can
also magnify the opposite torque reaction on braking
and give you brake hop.
Even a long TA, adjusted too far toward the launch
bite, can start to steal from braking downforce. The
adjustable TA I had in my car, gave me some wheel
hop in reverse that was never there with the stocker
(I had not ever braked hard enough to hop while it
was in there) and the nonadjustable I have now,
does not do it noticeably. So you might have to
back out of the pinion angle setting some and make
up any driveline angle error left over, another way?
also magnify the opposite torque reaction on braking
and give you brake hop.
Even a long TA, adjusted too far toward the launch
bite, can start to steal from braking downforce. The
adjustable TA I had in my car, gave me some wheel
hop in reverse that was never there with the stocker
(I had not ever braked hard enough to hop while it
was in there) and the nonadjustable I have now,
does not do it noticeably. So you might have to
back out of the pinion angle setting some and make
up any driveline angle error left over, another way?
01-11-2007, 02:51 PM
#5
Originally Posted by Sam Strano
You have a 12-bolt, which adds a lot of unsprung mass to the car--well beyone what the Bilstein's you have are meant for. From there, LS1's can have a tendency to do that, and TA's usually help, which you have. You also have LCA's, etc.
So, either something is loose, or broken, or everything is normal and the shocks just can't control the mass properly. When you rule out a busted TA or loose mounts, the rear shocks are the next stop.
So, either something is loose, or broken, or everything is normal and the shocks just can't control the mass properly. When you rule out a busted TA or loose mounts, the rear shocks are the next stop.
01-11-2007, 02:53 PM
#6
Originally Posted by jimmyblue
A short length TA that's made for launch bite, can
also magnify the opposite torque reaction on braking
and give you brake hop.
Even a long TA, adjusted too far toward the launch
bite, can start to steal from braking downforce. The
adjustable TA I had in my car, gave me some wheel
hop in reverse that was never there with the stocker
(I had not ever braked hard enough to hop while it
was in there) and the nonadjustable I have now,
does not do it noticeably. So you might have to
back out of the pinion angle setting some and make
up any driveline angle error left over, another way?
also magnify the opposite torque reaction on braking
and give you brake hop.
Even a long TA, adjusted too far toward the launch
bite, can start to steal from braking downforce. The
adjustable TA I had in my car, gave me some wheel
hop in reverse that was never there with the stocker
(I had not ever braked hard enough to hop while it
was in there) and the nonadjustable I have now,
does not do it noticeably. So you might have to
back out of the pinion angle setting some and make
up any driveline angle error left over, another way?
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01-13-2007, 10:18 AM
#11
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You must have braked HARD. I done that once while ******* around and came up on a curve. I have never had it happened to me again it just happened that one time. I had a TA/LCA's and all that **** too. Nothing was loose btw.
01-13-2007, 10:22 AM
#12
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Originally Posted by mitchntx
Brake hop is a common issue with 98 and newer F-cars. Adding all that weight back there with a 12 bolt has made it worse under heavy braking.
You need to learn where the hop begins and keep it right on the edge. It's called threshold braking.
You need to learn where the hop begins and keep it right on the edge. It's called threshold braking.
I have the same problem-low miles-stock rear-LCAs and TA. It is very common. All the guys I race (high speed auto cross) w (that have LS1 F-bodies) have the problem. Konis helped some, but you pretty much need to avoid it w braking technique, as mitchntx said. I'm sure Strano and the others are correct thinking more unsprung weight (12-bolt) is making it worse.
Actually my rear passenger tire bouncing like a basket ball. 