adegraeve

bump Steer Conversion Package For P93
P93 Bump Steer Kit w/ EVO Uprights Full kit with new and oem parts
containing the P93 GT2 EVO Uprights for left and right front, two new wheel
bearings and the special Motorsport tie-rods for left and right.
Everything needed to eliminate the bump steer inherent in P93's.

DO ANY OF YOU GUYS HAVE EXPERIENCE WITH THIS? IS IT WORTH IT?

Alain

nota_troll

Curious but what does it do?

chris walrod

It eliminates (or drastically reduces) the inherent bump steer the 993 has in its front end geometry, which is amplified at low(er) ride heights.

Mark Hergesheimer and I have talked at length about this. He has installed many of these EVO uprights with very noticeable, and improved results.

Norske

Alain,

Did you ever own a restuarant in Vail?

ESL

To ask a stupid question but can someone explain "bump steering" to me?

hatchy

Bump steering == steering caused by bumps or imperfections in the road.

adegraeve

no, that is not me. You are probably thinking of my good friend Luigi that owns CAMPO DI FIORI in Vail and in Aspen

Does anyone know what the cost of these parts are here in the U.S.
Gert is selling them for approx $1,600

Viken

Here you go: http://www.longacreracing.com/articles/art.asp?ARTID=13

Viken

Yes, but you don't really need it unless your car is lowered substantially. What suspension do you have, and what ride height is your car at?

adegraeve

i have the pss9 set up. the car is set at RS Spec.

Viken

OK, that's pretty close. Do you feel the bump steer? If you do, and it bothers you, go ahead with the kit. It really works.

viperbob

Are the RS uprights and the GT2 the same part??? Those are RS Tie rods, and they look exactly like the RS uprights.

chris walrod

While polishing the alignment on my 993 recently (thanks Mark, Laura and Jim) we had the front toe set at about 5min of toe-in at ROW ride height. We compressed the front end about 1/2" or so and saw a HUGE moment of bump-steer, even at ROW ride height. Front toe'd out about .4deg!

I do want to install the evo uprights some day to help this. Many say it really is a upgrade that is felt while driving. This is magnified at lower ride heights..

ESL

Viken,
Thanks so much for the great article.

adegraeve

Well, guys, I just ordered it from gert. I will let you know the results after it's installed.