hi people

does anybody have any idea's as to how much torque you loss with a compression test on the limit. i bought a leakdown tester but it's not reading right i think i will have to get a compression tester. just looked at the service manual and the limit is 128psi, if it is very close to this or worse is that where my torque and off boost driving has gone.

(53 plate sti)
oh and it hasn't just gone bad it has lacked power since i had it, but couldn't put my finger on the problem. all i can say at the moment is it losses 50psi out the cylinders quicker than 0-60 mph

many thanks

pogues