just a question for those with more experience than me, how much boost do you reckon my unopened motor can handle providing the fuel delivery is up to the task obviously, before the apex seals give way? ive been led to believe that 12psi is probably the maximum? i dont know how many miles are on the motor but the car has 90 000 miles on the clock. any advice would be much apreciated. its a 89 s5 by the way

 

Ive heard don't go over 15 without extra dowelling. But yeah I would stay around 12 to be on the safe side, more boost = more problems on a stock motor anyway