Bent front thrust arm? - Page 2

va122 · 03-31-2009, 11:32 PM

Thanks Rad. I'll talk to Fabryce tomorrow and get to the bottom of this. This started when i put their toe steer kit in. How would that affect camber?

NJ-GT · 04-01-2009, 12:03 AM

Quote:

Originally Posted by va122

Thanks Rad. I'll talk to Fabryce tomorrow and get to the bottom of this. This started when i put their toe steer kit in. How would that affect camber?

No changes in camber from a toe steer kit. If you have a 7mm or 10mm shim in one side and not the other, that's all the problem. Just put another same size shim in the Left and reset toe and camber through alignment. Easy fix.

If you have a bent trust arm, to replace is easy. As long as you know you haven't run hard over curbs, pot holes, etc, this should not be the case.

XLR8N-FAN · 04-01-2009, 12:42 AM

Quote:

Originally Posted by va122

Stop Hijacking my thread Martin!

Well OK, screw you guys, I'm going home.

BTW, Amazing info, Rad. Sorry I missed you at the SDR autocross. Come join us June 15 at the DE.

va122 · 04-01-2009, 04:30 AM

Martin you are too funny.

va122 · 04-01-2009, 04:49 AM

I hate this crap. I'll let you know what happens.

Quote:

Originally Posted by NJ-GT

Vic,

If your car is lowered, and the strut tops rotated, camber should be between -2.5 to -3.5 degrees.

A difference from 0.3 degress camber or less between sides locking the strut tops at the same location is normal. Adding 7mm of shims to the lower control arm increases 1 degree of camber, and increase about 0.3 degrees of caster.

Some shops use shims to adjust caster, and get the camber even with the strut tops. If you use rotating metal bushings, you can dial camber and caster with them + shims + strut tops.

The bent trust arm is a possibility, the lower control arms rarely bend they crack, but the trust arms can bend.

By the way, you want -3.5 on the front and -3.0 on the rear given your dedicated track/autoX. -2.5 is for street drivers with shared track/autoX use (like me, well not anymore).

I prefer to use the same size shims on both sides and use the metal center hole bushing instead of the adjustable one. This way caster may read different between sides, but even brand new cars have different caster reading L/R. Running uneven lower control arm lengths (due to different size shims) brings a new game of trust angles messed up between front and rear axle.

03-31-2009, 11:32 PM	#16
va122 Addict Rennlist Member Join Date: Jul 2006 Location: On Rennlist avoiding work Posts: 1,784	Thanks Rad. I'll talk to Fabryce tomorrow and get to the bottom of this. This started when i put their toe steer kit in. How would that affect camber? __________________ Victor Nationally certified PCA instructor.

04-01-2009, 04:30 AM	#19
va122 Addict Rennlist Member Join Date: Jul 2006 Location: On Rennlist avoiding work Posts: 1,784	Martin you are too funny. __________________ Victor Nationally certified PCA instructor.