tcsracing1

Bernie, your set up with this suspension is incredable! Im looking for every bend or turn in the city i can find to push the limit

Driving a RS with a well tuned suspension serviced by somebody who understands 997 CUP/Grand-Am cars can really help unleash the possibilities of the 997 platform and such knowledgeable service is an asset to any 997 owner looking for proper professional care of their Porsche.

no other auto maunfacture/marque is this much fun to tune!

looking foward to more tuning fun in the future!

Erik

Bernie, please do start on the Bilsteins !!

Apex996

Can you get whomever is doing your bump steer adjustment to give you the specs on how much toe change they measured per unit change of the suspension?

A plot of the toe change would be really nice if possible. Are you having both the front and rear bump steer set?

tcsracing1

im doing both front and rear...... as to specs, it is all foreign to me....

i drive/break em' and the shop fixes em'

NJ-GT

You just want the toe link parallel to the ground with the car at rest. Add spacers until you reach the flat angle, this will provide you the most stable dynamic toe.

The stock car doesn't have a flat (parallel) toe link, so it is already more sensitive to dynamic toe changes (bump steer). It was even worse in the 2004 GT3.

FFaust

^ Here I am, reading about bump steer this and bump steer that, wondering what it is (as an adjustment as in "I'm getting by bump steer done"), do a search, come up with a gazillion threads and Rad (?), you just cleared it up with two short sentences. Thank you

tcsracing1

One thing is for sure, RAD knows the business! He opened my eyes to the sceene!

Nizer

Sure beats collecting watches...

Apex996

I really would like to see data or a plot. Because this is not true for most cars.
Don't make me borrow a bump steer gauge and do the work myself... please!

mooty

PLS dont get me started on that again. i FINALLY shook off that drug habit.

mooty

pls borrow a gauge. i never seen a bump steer gauge. love to see it.

FFaust

So as long as I'm exposing my ignorance, why wouldn't the factory want to achieve the "most stable dynamic toe"?

Yes, everything is a compromise, what you gain in bananas, you lose in oranges, so what would be the downside of having a setup that minimizes bump steer from the factory? Maybe loss of travel, so loss of comfort on a "road" car

911SLOW

This is a good question, speaking about rear toe they messed it up from day 1. It's easy to understand some of the compromises they do for comfort by maintaining some rubber, but the bolts of the rear toe links and their angle (more when lowered) are badly designed and can become dangerous. Especially after a few ins 'n outs of the eccentrics.

Fortunately the fixes are easy and considering the benefits, cheap too however.

tcsracing1

the process is very time consuming and requires alot of experience with track cars.
from the secrets of the shop, nothing short of a letter from god would probably get them to reveal the friuts of their labour.....

believe me, i try......

NJ-GT

No downside at all, except for Porsche because they would need to manufacture specific parts for the GT3.

The toe links from the 997 GT3 are from the 996, the dog bones are shared by the standard Carrera and Carrera 4S (and Turbos and Cabs). Reusing parts saves them money, but brings you less than ideal geometry.

The older the GT3, the more they share parts with the Boxster and Carrera.