Steering, Suspension, & Brakes

Chris
The steering dampener does help. The biggest difference I noticed is when driving over railroad crossings. Jim is correct though in that the farther out-board your wheels are spaced, the more sensitive the steering will be to road shock.

Bill

I'm only running a 1/4" spacer on each front wheel. Would removing that make much of a difference?

It could make just enough.

JB

Wheel offset can complicate the original OEM center line design; caster change can also contribute to wheel shimmy. Here a nice article on steering and alignment problems.....
[www.niumotorsports.com]

Jacques

I would agree, that the further out the wheel is mounted from center line of hub and wider tires would result in road shock. I'm running a bolt on 1" spacer from 4 x 4 1/2" bolt pattern to a 4x100mm bolt pattern, with a 45+ mm offset wheel. Let me tell you that when I hit any bump or slight pot hole on the freeway, I need to be holding on to steering wheel. The tire width or foot print is about 9 1/2 " on the road with a 245/45/17 tire.

I will be looking into this shock setup very soon. I thought is was bump steer but my car didn't move off the straight line of travel.



Edited 1 time(s). Last edit at 11/18/2011 06:10PM by 74ls1tr6.

I consider scrub radius the enemy. I suspect some folks run a larger steering wheel or dampeners, because of excessive amounts. Calvin, it sounds like your car suffers from positive scrub radius ? Can you adjust for more ball joint/king pin inclination, to reduce the scrub radius ? Good Luck, roverman.

Art,

Took the TR6 to Les Swab here in town and had a 4 wheel alignment done. It needed it for sure since building the car. I had it pretty close from eye balling it.

Front needs more caster still, but I added metal plates(to stengthen) at the wishbone arms attaching points. By doing this I need to install lomger bolt studs for more caster adjustment.

Front and back I'm running negative camber @ 1.5 all four wheels.

Front toe in 1/16... back 0 toe in

Running 30psi in all four tires and myself in car while doing the alignment.

So after alignment it was a world of difference. I'm in the process of adding 12.19 vented rotors up front with Wilwood 4 pot calipers. At that time when apart, will add in loger bolts to achive more caster. Also my suspension doesn't have much deflection because of the use of nylatron bushings. That being said, I feel everything at the steering wheel. When apart, I'm taking out a 3/4" spacer under the spring to lower the front back down an 1". In the end I think it will curb the problem out.

Thanks Art for your interest!

Calvin, some irs's use small toe-out at static, knowing they will pull in under load. Cheers, roverman.