the number is going to depend on how many times you crank the car, the gauge used, etc...

as long as the numbers are within 20psi of each other you're fine.

 

 

all test were done following exact manual specific procedures. Motor was at operating temp ect. ect.
All numbers were recorded after 7 cranks

 

sounds like your gauge reads high, are they loaner tool or they are yours?

compression gauge get bang out of cailbration if you don't handle them right, have you seen those noobs pulling the gauge off without bleeding off the pressure?

just find a good running civic and see if your gauge can up the compression number to 250 psi

 

well see that's the thing. I know the gauge reads a bit high by like 10. We have used the gauge many times and it seems normal on most cars. Friend of mines has a JDM k20a and he was getting 230-240ish... and that's 11.5:1 not 11.1:1

 

I keep track of my compression checks on the inside of the spark plug cover. It's checked once a year

At 10k miles my compression was 255 all the way across. 48k later it's 255 on 1 to 3 and 250 on 4.

You have a good motor.

flsfshr

 

http://www.autospeednet.com/sites/3dauto.c...iewterm/3681/0/

the high compression numbers are most likely due to carbon build up. especially if the car was used for short trips and driven like a grandma before your ownership.


check out the article in the link. keep in mind carbon build up can have varying levels of severity, the article pretty much sums it up.



if you have time remove your spark plugs and shine a light onto the piston. carbon build up is the black stuff on the piston. you should be able to see the piston at top dead center (when it is at the closest to the spark plug).



hope that helps.