mike58

Hi
I was lucky enough to get my GT3 used as a demo on a dealer geometry night and thought I would tweek my trackday setting to the Kussmaul settings.
Now that its done I am worried i made an error with the rear toe.
On this Rennlist thread it clearly states + 35 ' each side https://rennlist.com/forums/996-turb...ngs-on-tt.html Would that mean a total toe of 1deg10" ?

On this Rennlist thread it is total toe 35" https://rennlist.com/forums/996-gt2-...-settings.html
Does that mean 16- 17 " per side of toe out at the rear.

Is there a definitive CORRECT Kussmaul rear toe setting or are they both the same and i am missing something?
Mike

mjb

The rear toe spec is "+" which means toe-in. 35' is total toe-in (16' - 17' per side) , or about 4mm to 5mm total.
35' toe out and you will be waving to the rear end as it passes you on the way out from the apex

Bob Rouleau

Mike - I am the guy who originally posted the Kussmaul specs, he sent them to me in an excel spread-sheet - which blew my mind. It was as if God had spoken to me directly

Rear toe in TOE IN with a total of 17 minutes per side or 34 minutes total.

Over time I suppose my orignal specs were copied and errors crept in.

Best,

ninerguru

Please enlighten me... Who is Mr. Kussmaul? Thanks! Lou (anxiously waiting for confirmation that his GT3 is getting picked up later this week in CA)

Bob Rouleau

nineguru can you google Roland Kussmaul and save us lots of typing?

ninerguru

I will... Thanks! Lou

mooty

Kussmaul?
retired old fart, no one important ;-)

mike58

Cheers
I mistakenly got it set to + 35' each side ( toe in!!)
I will get it readjusted, ironicaly it was + 15' on one side ( the other was well out at +2')
Thanks for the help, it was unfortunate ( for me ) the typo crept in.
Just so that i haven't made any more errors what is the toe in or out at the front each side? I have gone for + .05' each side

Bob Rouleau

In front, you can use 0 toe although I prefer 2 mins toe in per side which makes the car more stable on boring drives to the track

mike58

But were the kussmaul front settings 5' toe out? or 2.5' each side toe out, sorry for all the questions.
mike

Bob Rouleau

FRONT Toe settings are 0 degrees +/- 2 minutes.

So, no toe, or 2 minutes of toe out or, 2 mins of toe in. Note these values are per side. It is important that Caster be 8 degrees +/- 30 mins.

himself

I use a "modified" Kussumaul alignment on my GT3: -3.0 F camber on 245s, -2.0 R camber on 315s. Very little toe (Front Toe 2' in, cross toe 4'; rear 11' in, cross toe 23'). With these settings I am able to swap tires left to right to even wear, and most of the time I don't even have to flip them on the rim. For the most part I get very even wear across the fronts and rears.

-td