911 Rod

Hi All,

Now that my 22/29 torsion bars and all the other goodies are in and the car is corner balanced it's time for an alignment.
10K street and 6 track days per year.

86 911 Euro height
I'm thinking
Toe - Front 0 rear 1/8" in
Camber - front 1 degree, rear 1.5 degrees, both negative.
Caster - 6 degrees?

Any input is greatly appreciated.
Thanks
Rod

911 Rod

Anyone?

dsmith

looks like a nice conservative start. if it feels a little tight in low speed corners you could then go to 0 deg toe rear and /or 1/8" total toe out in front. camber could be improved using a pyrometer, if you want to spend the effort for the track. what you state should not cause excessive tire wear. caster's fine.
David

911 Rod

I will have this done for me on an alignment machine.
Therefore I only get one shot at it.

dsmith

If you see this as a one time deal, then you need to decide if tire wear is more important than track performance. Myself, I always leaned toward the track and didn't care about tire wear, so I would be at 2-3 deg neg camber and 0 toe front/rear to 1/8 in toe out front/rear depending on the car. expect to replace tires at 10k miles or less.

If you are unsure after researching people's settings, I would suggest 0 toe front/rear and 1.5 neg camber front/rear to start. decent tire wear, decent handling.

911 Rod

I have over 1 degree on the front and almost 2 on the back now.
I just swap the tires side to side once a year to even the wear.
Souldn't the rear toe be in and the rear camber be more than the front?
Thanks

Peter Zimmermann

Rod: A pyrometer is your best friend, and is really the only way to maximize your setup. If you run high speed events (3rd, 4th & 5th) I would use + 1/32" toe on all four corners. You have very aggressive T-bars for a narrow bodied car, so it will be difficult to set the camber without experimentation. That said, I would start with 1.2 degrees front, and 1.8 degrees rear, then concentrate on inflation pressure gain (cold to hot). Your caster should be as close to 6 as possible, but if you can't get more that 5.2 - 5.5 that's OK. If you run slow speed stuff you can build in a touch more camber and go back to zero toe on the rear (you always want toe out on the front to aid with turn in!).