01-26-2012, 03:20 PM
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#17 (permalink)
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A True Z Fanatic
Join Date: Jul 2010
Location: window seat
Posts: 28,940
Drives: Mostly on two wheels
Rep Power: 121
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Quote:
Originally Posted by Guard Dad
A little context please: I've done a lot of
reading on suspension design over the years and I know that bump steer
is generally to be avoided. Since bump steer characteristics, on a
production car, are rarely adjustable I have no practical experience
altering them, so please help me out, is a 1/16" toe change (most of
it on bump) considered to be a lot/excessive for a car such as the Z?
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I am choosing my words carefully here to avoid having them misconstrued by some of the overly sensitive members here, so the answer I will give is I believe so
Quote:
1. Changing the inner pivot point (dropping it or moving it in a bit,
probably not practical) could alter the bump steer profile.
2. Changing it's length (most likely longer) would reduce the
angularity of the torque arm over it's length of travel which should
"soften" or reduce the total amount of toe change. This assumes that
there is enough adjustability in the torque arm to make a meaningful
increase in length and enough adjustability in the rear suspension to
bring the static toe and camber adjustments back into spec.
Comments?
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I would agree with both of these. I also agree that the first is likely not practical.
I have no real experiece with the Megan arms, but I am always hesitant to use Megan parts. I know that a longer arm is needed to get good bump dynamic, but at the same time, I don't imagine you have the time/money to play around with a bunch of different parts.
If you do get the Megan arms, definitely post up thoughts though. I'd be curious to see if it sorts out the craziness (and it would be pretty helpful for anyone else that experiences it)
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