Street alignment specs

[Steve Tinker]

Woody...
Earlier this year I installed PSS9 coilovers to my 2001 S and had the same questions.
I lowered the Fronts 17mm & Rears 12mm which is about half of what yours is.
I had a quick alignment by a non Porsche shop and it was OK on the road, except the car got nervous over 140kmh. So I took it to a Porsche shop and they gave me the following setup:

FRONT: Toe = 1,5mm, Camber = -0.6 deg, Caster = +7deg.
REAR: Toe = +2.0mm, Camber = -2deg.

Wih the Front toe increased from 0 to 1,5mm the nervousness dissapeared and the car now feels really good at all speeds.

PS. with your lowering, be prepared to scrape your underside - perhaps the roads in BC are better than in Australia, but even mine set at 17mm & 12mm lower than stock, its easy to contact the underside.....

So, yes the rear need more Camber than the front. The shop said that having my 65kg weight in the drivers seat for normal roadwork was splitting hairs, but for track work, that weight & corner balancing was preferred.