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Author Topic: Sierra front arb double washer mod  (Read 128 times)

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Offline scud

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Sierra front arb double washer mod
« on: February 17, 2020, 13:29:15 PM »
I remember years back seeing Tony saying that you can double up the rear washers on the arb to tca Bush(void Bush) and that it would affect the geometry in such a way that understands is reduced.
Has anyone tried it?  Did it work?

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Offline Marc

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Re: Sierra front arb double washer mod
« Reply #1 on: March 10, 2020, 12:33:58 PM »
Adding the washers there increases caster of the front wheels. That does give some additional front camber when the steering wheel is turned, so it could reduce a bit of understeer. Additional caster will also help with straight line stability.

Be aware that after the washers are added you will need to have the tracking done, as the washers will also change the toe setting.


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Offline scud

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Re: Sierra front arb double washer mod
« Reply #2 on: March 15, 2020, 15:46:19 PM »
thanks Marc I knew it would change the castor but hadn't realised the camber would also be affected so im going to give it a trial since I was replacing the tca's and reinstalling the rack anyhow and ive had a set of spare washers since I read tonys comments about it years back  :2tu:

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Re: Sierra front arb double washer mod
« Reply #3 on: Today at 14:04:01 »
I don't recommend this.
it was worth a try, turn in felt improved and steering was lighter but it came with fairly bad instability and shuddering steering wheel under heavy braking and a lot of bump steer, minimal for normal driving but still a little unpredictable

 

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