Reverse Rake after Corner Balance Normal?
 

After getting my PSS9s installed, I had the car aligned and corner balanced. I asked them to start around ROW M030 height and go from there.

When they were done the car seemed a little low in the rear, but it was hard to tell without measuring. After a couple test drives, I measured the ride height front and rear (based on the locations in the service manual) and got about 125mm in the front and 107mm in the back (minor variation side to side). So it has a reverse rake. However, the corner balance numbers look good (cross numbers anyway).

LF: 763/24% RF: 728/23%
LR: 861/27% RR: 827/26%

I'm not sure what they were measuring, but they listed the ride heights as:

LF: 25.625 RF: 25.625
LR: 25.125 RR: 25.375

Does this seem right? I was really hoping for 125-130mm in the front and 130-135mm in the rear. I'm not sure I can live with 107mm in the rear without bottoming out.

did you measure with your equivalent weight in the driver seat?

I did not, but I will do that. I’ve got a bunch of weights I can use.

I loaded 180lbs in the driver seat and checked again. Numbers did not change much. Maybe a little higher in the front.

I spoke to the p-car shop and he said that’s usually how they set them up for handling (rear a little lower than front) to help prevent the car from diving under breaking. His Boxster is set up similarly.

I guess I’ll just drive the heck out of it for now and worry about changes when it’s time for a new set of tires.

This is about right, my 996 is setup with a little extra weight on the rear for traction. The 986 is setup about the same, don’t have the exact numbers handy.
Shawn