spaceman_spiff

i just got a compression test done on a 94 rx7 i'm about to purchase this weekend. i believe the numbers they quoted me were around 7.8-7.9. they said that brand new motors have numbers around 8, so the motor is in very good condition. what exactly do the numbers mean?

parid

This wouldn't be cliff from oregon, used to have a 02 wrx?

Prophet7000

You'll get 6 numbers. Each one represents the compression on each of the three faces of both rotors. The numbers you have are in kg/cm2 (7.8-7.9 kg/cm2 = 111-112 psi). An explanation of the compression vs engine health can be found here:

http://www.rotaryresurrection.com/3r...ion_check.html