94 del sol/B16 with 165-175 psi cylinder compressions - Is this good?
 

So I have a 94 del sol with a b-16 and just did a compression test. It came up between 165 and 175 psi. The motor has 243 thousand miles. Is that good compression or what?

Re: 94 del sol with b-16
 

did you do your test with the throttle body wide open??

Re: 94 del sol with b-16
 

10 bucks says he replies with "no"

Re: 94 del sol with b-16
 

It was just turning key nothin else

Re: 94 del sol with b-16
 

try again while holding throttle wide open while turning over
numbers will change
promise.
:thumbup:

Re: 94 del sol with b-16
 

Should it increase or decrease?

Re: 94 del sol with b-16
 

increase.
chances are you'll be good with it
post numbers after you do that.

Re: 94 del sol with b-16
 

Sounds good. I figured with the amount of miles on the motor it would be less then that but I was pretty shocked.

Re: 94 del sol/B16 with 165-175 psi cylinder compressions - Is this good?
 

The engine should be warm too.

Re: 94 del sol/B16 with 165-175 psi cylinder compressions - Is this good?
 

What does holding the throttle WOT do? I know it cancels injectors (well on Fords, atleast).

Re: 94 del sol/B16 with 165-175 psi cylinder compressions - Is this good?
 

It gives you an accurate reading plus it fills the cylinders much faster . The last thing you want is numbers all over the place. It is the PROPER way of doing a compression test.

Re: 94 del sol/B16 with 165-175 psi cylinder compressions - Is this good?
 

The throttle angle directly affects the cylinder pressure when the intake valves close, so it'll affect your cranking pressure too.

Re: 94 del sol/B16 with 165-175 psi cylinder compressions - Is this good?
 

The engine was warm I did the cylinder closest to the distributor first it was 175 second was 173 third was 168 and 4th was 165.