Are these numbers good? I may add nitrous later and wanted to make sure my compression is good. 170, 175, 175, and 170. I noticed that cylinder 4 went to 175 while cranking the engine but once it stopped the guage went to 170. This was for a dry test.

those sound pretty good, about moderate i believe, most are around 205 210 or 215ish. but i think your alright.


96 Talon ESi Mods
apex' dunk exhaust
injen short ram
magnecore 8.5mm wires
front/rear strut tower bars
custom painted interior
carbon fiber hood

I forgot to add that the car is a 97 gs with 125,000 miles on it.

Damn....now I don't feel so bad for stacking almost 90 onto the Odo of my 97 GS. Walk a few blocks every now and then, man. ;)

I have 95,000 on my 97. But I only have 500 on my motor and about 700 on my clutch. I got 210 for all cylinders when I did my compression test at 72,000 miles. Now with 8:8:1 compression I got 205 for each cylinder.

compression numbers also vary with the altitude
200 is perfect for a car at sea level any variation from sea level and your numbers will go down

I thought they were alittle low. I guess I'll have to think twice on the nitrous. I don't know how much of a difference altitude makes but I'm in Richmond VA if that really matters. I know the miles are alot but they are mostly highway miles also. If I could park it I would but I can't see walking 25+ miles to work. :-) Is there anything I can do to increase the compression(besides tearing it apart and rebuilding)?