Tom R.

Will the alignment specs change when I go from 16" design 90 wheels to the 17" Boxster take offs?

The car is aligned for the 16's right now, and the local trustworthy shop can't hook his machine up to the 17's.

Danno

There's a TSB on fitting 17" wheels onto cars that originally came with 16" wheels. Basically calls for using the upgraded caster mounts and increasing caster to 3.5 degrees.

Here's a link to a thread that has TSBs on both 17" & 18" wheels:

<a href="http://forums.rennlist.com/cgi-bin/rennforums/ultimatebb.cgi?ubb=get_topic&f=15&t=001319" target="_blank">Do 18 inch wheels put a lot more stress on the suspension than 17s?</a>

Tom R.

Thanks Dan, I knew it was out there.

Why does every answer seem to spark a new question. See my latest question.

rk

The 17" wheel TSB says its for 1987 and on cars. Will the same caster block change work on an 86 951?

Danno

Yah, the upgraded caster block works on the '86 951. However, none of the wheels listed in the 17" TSB will fit, so you're on your own there.

crazandy

Does anyone have a link to those bulletins for the 17" wheels on an 89 NA?

crazandy

I just wanted to make sure my alignment specs are correct for my Mille Miglia Cup 3 Wheels:

Front 225/45 17 on 8 X 17
Rear 255/40 17 on 9 X 17

<a href="http://crazandy.mine.nu:8080/porsche/a.htm" target="_blank">http://crazandy.mine.nu:8080/porsche/a.htm</a>

crazandy

Anybody?

crazandy

...

adrial

Far as I know an aligment's an alignment regardless of wheel size.

Those specs look fine for a street car.

Maybe a bit much camber at 1 degree in the rear, thoughts? That as compared to .4 degrees in the front would make the car want to plow (understeer).