Speed brake wobble! Just installed new coilovers.
Apr 12, 2013, 09:57 PM
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Speed brake wobble! Just installed new coilovers.
Well as the description states, I just installed new coilovers on the front of my evo8 and I don't have them dropped or anything. Their actually higher in the front now then in the back because I didn't have time to put the rear ones in or adjust the front ones. Question is, do you have to retighten the top bolts on top of the strut due to them being fresh paint and I'd imagine they might wobble a little loose. Or can my car being raised in the front have anything to do with it? I will be checking my rotors tomarrow also to make sure their not warped... All I do to test that is spin them around and make sure they don't get caught up on the pads right? Thanks alot . I will keep everyone updated on my findings tomarrow
Apr 12, 2013, 10:04 PM
#2
as long as the rotors are torqued spinning them will do well enough i suppose... a dial indicator would do ya better...
depending on how offset the suspension is it would cause a wobble... the front being higher would throw off the caster angle.
it will also throw off the aero of the front end causing a lift at speed... idk how fast you drove though...
personally i would go back and check all torque specs... set the suspension to the proper ride height... test to ensure there is no wobble... then set it to you prefered settings and get an alignment...
the last part being the far most important if you intend to keep tires for more then a few weeks at a time
depending on how offset the suspension is it would cause a wobble... the front being higher would throw off the caster angle.
it will also throw off the aero of the front end causing a lift at speed... idk how fast you drove though...
personally i would go back and check all torque specs... set the suspension to the proper ride height... test to ensure there is no wobble... then set it to you prefered settings and get an alignment...
the last part being the far most important if you intend to keep tires for more then a few weeks at a time
Apr 12, 2013, 10:11 PM
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It's when I was on the highway 70+ an hitting the brakes tho that's why I don't know exactly what it is yet but I will be buying some new tires in a few weeks then ill get an alignment for sure
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Apr 13, 2013, 06:23 PM
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High speed brake wobble is almost 100% due to warped rotors. Runnout on a warped rotor doesn't have to be very much to cause a high speed wobble, and you still won't feel it in town. If you're getting it in the brake pedal and/or steering wheel, it's from the front. If you feel it in the seat, it's from the rear. Most of the time it will be the front.
The only other possibility if it isn't in the braking system, would have to be the change in your suspension geometry (in my opinion). With the new coilovers and no alignment, now all 3 front suspension alignment specs will be out. Most importantly being camber. Front end riding high will give you excessive positive camber and as mentioned above, will wear out those tires. But at highway speeds, with the tires leaning excessively outwards, and toe not properly being set, the tires could be fighting the road while heading straight and any sudden weight shift due to braking could cause the wobble.
Just my 2 cents on the issue. I've dealt with alot of modified suspension alignment issues at my shop before. Keep us posted.
The only other possibility if it isn't in the braking system, would have to be the change in your suspension geometry (in my opinion). With the new coilovers and no alignment, now all 3 front suspension alignment specs will be out. Most importantly being camber. Front end riding high will give you excessive positive camber and as mentioned above, will wear out those tires. But at highway speeds, with the tires leaning excessively outwards, and toe not properly being set, the tires could be fighting the road while heading straight and any sudden weight shift due to braking could cause the wobble.
Just my 2 cents on the issue. I've dealt with alot of modified suspension alignment issues at my shop before. Keep us posted.
Apr 13, 2013, 09:01 PM
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Well after I took it back to my shop today I jacked the car up took both wheels on the front off and put them back on. Okay here's what I think was the issue. So I had the oem mitsu locking lug nuts. Lost te key ofcourse! So I had 4 lugs on the right tire and 5 on the left. So I tightened the right wheel with 4 lugs then just did some in town diriving just to feel out the coils. Then got a lug nut and tightened it on. So I think it had something to do with that . Also I lowered the front just a tinge and tightened the top 3 bolts a little bit more, seemed to fix the issue so far. I got up to about 90 and hit the brakes and didnt seem to get a shake in my steering wherl
Apr 13, 2013, 09:37 PM
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Well after I took it back to my shop today I jacked the car up took both wheels on the front off and put them back on. Okay here's what I think was the issue. So I had the oem mitsu locking lug nuts. Lost te key ofcourse! So I had 4 lugs on the right tire and 5 on the left. So I tightened the right wheel with 4 lugs then just did some in town diriving just to feel out the coils. Then got a lug nut and tightened it on. So I think it had something to do with that . Also I lowered the front just a tinge and tightened the top 3 bolts a little bit more, seemed to fix the issue so far. I got up to about 90 and hit the brakes and didnt seem to get a shake in my steering wherl
