Ok, so when I first picked up the car in March, I did a compression test. The results were 220, 215, 215, 215. Now, the results are 215, 215, 210, 215. However, I am using a different tester. The numbers are engine hot @ WOT.

Would it help to do an engine cold test also?

Do these numbers still look good?

Can the different tester be the cause of the change in compression?

Thanks.

EDIT: The motor is stock except for drivetrain mods.

 

You have nothing to worry about

I think you are supposed to do it on a warm/hot engine and not cold but I dont know why.

 

You do it on a warm engine so everything is expanded to operating conditions

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 92TypeR &raquo;</TD></TR><TR><TD CLASS="quote">
Do these numbers still look good?

Can the different tester be the cause of the change in compression?

</TD></TR></TABLE>


YES

YES

 

Thanks Oscar

I think I dont need to worry. +/- 5psi isn't a big deal anyways I suppose.