hkiang

Hi Everyone:

I just had my '88 Carrera corner balanced and aligned. What camber is everyone running? I now have a recorded -1.3 degrees in the front and -2.1 in the back. My concern is that this is too agressive for the street.

Thank you,
Henry

JackOlsen

I run -2.2F/-3.2R on the street.

hmd

Jack,

interesting that you run more on the rears than the front. What's the theory behind this?

JackOlsen

Well, I've never heard of an air-cooled 911 being set up any other way. I guess the theory is that the car weighs more in the back. And it has the old fashioned rear suspension design.

I think only the 996 (and later) cars benefit from more camber in the front. But I'm not even sure about that.

hmd

Well you learn something new everyday, I've been running with -3.0F/-2.5R, but I am a air-cooled noob.

imcarthur

1.1 front & 2.1 rear for street only.

Ian

edit: both are minus of course.

Richard C2S

-1.8 front, -2.2 rear.

rnln

What is the manufacture recommendation then?
I remember there is a thread somewhere saying there are 2 setting: normal and sport.
Front -0.0. Rear -0.1 Or Front: -0.1 and Rear -0.3
Thanks.

imcarthur

Here is the Porsche alignment chart. Normal spec is between the arrows. But the camber suggestions are really tame.

Ian

Peter Zimmermann

Ian: Good post with the chart! I even run my car slightly more "tame" than you, and find that it's extremely predictable and consistent. I like - .5 front, - 1.0 rear. What I find makes the biggest difference is the toe, which I run in a toe OUT setting of 1/32" each side. This gives a great combo of good tire wear, overall balance, and great turn in at higher speeds. I've found that excessive camber on a car with street/stock t-bars and sway bars becomes too twitchy (for my liking).

hmd: How the heck did you get 3 degrees negative on the front of your car?
Pete

earlyapex

Track driven only.

-2.5 degress front and rear.

911 2

would someone kindly explain what all these figures mean

JackOlsen

Camber is a term used to describe the angle of the wheel, considered vertically, in relation to the ground. A picture being worth a thousand words, look at the way the wheels 'lean in' in the picture. The tops of the tires are closer to the center of the car than the bottoms.



Why have the wheels sit this way? Well, in hard turns, inertia causes the car to 'roll,' so that the bottom of the car is no longer level with the ground. Since the outside wheels are doing all the work in a turn, you want them to be angled so that they're closer to level with the ground when the car is rolling left or right. What you want is for the tire to be flat on the surface of the pavement. But if you're flat on the pavement when you're going straight ahead, you won't be flat when you're rolling to one side or the other (unless your suspension was solid and had no give to it. Look at the way the outside wheels are nicely planted in this picture, while the inside wheels are either off the ground, or barely touching it. It doesn't matter very much what the inside wheels are doing, though, since they aren't supporting hardly any of the car's weight in a hard turn.

r911

This is positive camber:

imcarthur

Good example Randy. You don't see many Pcars like that.

Ian