PORSCHE 928 WHEEL ALIGNMENT MEASURING DATA 4/6/03

The following values apply at empty weight in accordance with German DIN 70020 standard. (car with full fuel tank, spare wheel and tools).

FRONT AXLE HEIGHT ADJUSTMENT: From wheel contact patch to measuring surface on rear control arm pivot boss. 180 - 20 mm for used cars. Most cars are at the lower limit, or lower.

FRONT AXLE Adjustment values Max. Difference Left/right
TOE-IN (BOTH WHEELS) +15' +or- 5'(.25 Degrees)  
TOE-IN (EACH WHEEL) +7.5' (.125 Degrees)  
CAMBER -30' +or- 10' (-.5 Degrees) 10'
CASTER up to '86 3Deg 30' +30' (3.5 to 4 Deg) 20'
CASTER '86.5 UP 4+1 degrees (4 to 5 Degrees) 20'

REAR AXLE Height adjustment: From wheel contact patch to measuring surface on lateral subframe 163 + 10mm for used cars.

REAR AXLE Adjustment value Max. difference left/right
TOE-IN, EACH WHEEL +10' +or -5' (.167 Deg) 10'
CAMBER -40' +OR- 10' (-.66 Deg) 10'

Note: The ride height specification tolerance in the shop manual is negative for the front wheels and positive for the rear wheels. I take the easy way out and measure the fender lips from the ground through the wheel center. 27" front and 24.5" rear