sixtyfiver

997.2 Gt3 RS all stock suspension.

Really looking to dumb down handling to have some fun at lower speeds. Looking for car to understeer as to control with throttle.


Use of vehicle:
75% smooth canyon and street (35- 65MPH)
25% freeway driving.

Objective:
1. Go-cart, sharp, responsive

2. very little sway

3. understeer
4. No tram-lining.


Would like the following recommendations.
Camber / toe
Front and rear sway bar settings.
Caster, if adjustable.


Any suggestions or experience with with this type of set up.

Mr. Adair

This is what I ran on my last RS. These are recommendations from Tom at TPC for a street/track set up.

Factory ride height
Front camber -2.0
Front toe 0
Rear camber -1.8
Rear toe +14' (toe-in per side)

Sways stayed stock and we added adjustable rear toe links to fix the usual jiggly butt issue on these cars. I was happy with this set up. Compared to stock, the car had better turn in, less jiggly rear, much sharper steering. On track it was much better aside from I feel like I would have eventually needed stiffer front springs. On the highway it was definitely a little more twitchy in terms of stability but not a real big deal. You seem to want more of an aggressive setup anyway.

Others with more experience than me will chime in I'm sure but Tom has plenty of track experience and it was what I wanted. Good luck!

ngng

I like a little toe out in the front.

1/16 total front toe out
3/16 total rear toe in

HarmonyJim

My personal experience is that unless you wish to be chasing the car all over the road, be careful with "track/street" alignment specs. I have a 997.1 RS with a very upgraded suspension, and I tried the track/street alignments that are commonly used. What is critical to understand - something I failed at until I wasted $300 on such an alignment - is that there are trade-offs that affect street-use stability. Different requirements for differing tasks. My experience was that the car was constantly - and very disturbingly - 'searching' while traveling in a straight line, which for me destroyed the casual enjoyment of the car. One moment it wanted to dart into the ditches alongside, and the next into oncoming traffic. Tires were perfect MPSS if in question. The turn in was quicker, and with possibly less understeer, but the loss of straight line stability was way bigger for me than those possible gains. After an additional $320 at my local Porsche dealer, I went back to oem specs for a 997.1 RS, and the issues I mentioned disappeared. It literally felt perfect again. The RSs are very sensitive to alignments being correct it appears.

DJN

Set to factory stock settings.....have your local dealer or high quality independent do it.

With what you are looking for, you don't want too much camber, or toe that is too aggressive.

sixtyfiver

Great info, will help tremendously as a good baseline especially coming from TPC. Thank you.

A bit of toe up front might create some tram-lining which I am really trying to avoid.

JS

Did you upsize to the 245/325?

gmgracing

Hey there,

We can help you out with your alignment questions, maybe even do it for you if you're local! Feel free to reach out to us at - 1.714.432.1582 or email Sales@gmgracing.com
gmgracing.com

ngng

i haven't noticed any issues with it

Tom@TPC Racing

I run 1.2mm of toe-out per side. Have been for 5 years on my current car, and on my previous car. I don't notice any tram-lining. But there are other factors to consider, they are how stiff the springs, dampers, and sway bar setting are. Rear toe can affects the front as well. Feel is subjective so some drivers are more sensitive to it than others.

sixtyfiver

Corner balance and allignment completed today by Chris at West End Allignment in Gardena . I purchased the car two months ago and needless to say but the previous allignment figures were all over the place and the car showed it.

CB final figures:
680/632 front
1052/1004 rear
Diagonal 1684/1684 including driver @ 161pounds

Allignment:
F- - 2 camber / 0 Toe
R- -2.1 camber / 1/8” Toe in

Sway bars:
F- 1 from full stiff
R- Middle

Car feels so much better, thanks for all the input. Maybe will try a bit of toe out in a couple months based on recommendations above.

Thanks again folks.

mooty

^ good baseline
every one is different
drive it a bit then decide
your alignment for ME, would understeer way too much,. but we may not have same driving style.

Spyerx

On front toe
toe in will slow down corner entry reaction but give you more feel mid corner
toe out makes the car turn in harder but can lead to a push feel mid corner

i tend to like 0 toe or a little toe in. Toe out to me makes a car feel darty and not as good in corner.

But there are lots of factors here other than toe

reducing rake can also give the car a bit less rotation feel on corner entry and make it feel understeery

DK7

Whats your setup ?

sixtyfiver

Thank you Spyerx, I will try a bit of toe in soon. I’ve had experience with toe out before and never thought front toe in was an option but definitely sounds interesting to try out. Btw, still not feeling really connected after the allignment, something still missing.