Well I decied todo a compression test on my car just to see how good condition it is in..

Well i just have one problem.. Can someone tell me if what I got is good or bad.

8=190 7=200
6=200 5=185
4=190 3=170
2=190 1=185


Thanks guys!!

Kat

------------------
90 RS 305 TBI A4
Dumb ***/**** poor/orginating memeber of the infamous NE Crew
Time to see, believe this in me,This pain that i feel deep inside

 

That's mostly pretty good, except for #3 being lower than the rest... it probably has a warped valve.

Your numbers may seem high, since you have a low-compression motor, but are actually quite normal. Since a compression test is a mostly adiabatic process (that is, one where heat can't escape), the temperature in the cylinder rises dramatically at the peak of compression, and therefore the pressure does too.

A motor with a significant cam will have lower numbers than that because the longer intake duration allows more compression to "leak" off at the beginning of the compression stroke, as the intake valve will still be open for some of the upward movement of the piston.

------------------
"So many Mustangs, so little time..."

 

Thanks for the reply.

As far as i know it is completly stock L03. with about 153,000 on it(well more like 110,000-120,000 the speedo is way off)

You are right about the valve cause the seals are shot. Every morning I get a nice puff of blueish white smoke =)

Thanks again

Kat

 

Thats pretty damn good. my 250k+ LO3 has barely over 100 in some cylinders