Compression numbers NOT GOOD LOL

[Blaze4G63]

so i did a compression test yest and i had 130,130,129,130 NOt good car feels really solid though..pulls hard under boost...i dropped some oil in the cylinders and it came up to 175 -200 so i know my rings are gone i got a spare motor but it hasent been ran for over 4 years so who knows what its like...last owner said it was rebuilt but everyone says that

 

[RadDsm]

Jeez, how much oil did you dump in the cylinder to bring it up that much?

It's low, but still above the service limit and there isn't much of a variance between the cylinders.

164 psi Standard

121 psi Service limit

14 psi Maximum difference between cylinders

 

[Blaze4G63]

Jeez, how much oil did you dump in the cylinder to bring it up that much?

It's low, but still above the service limit and there isn't much of a variance between the cylinders.

164 psi Standard

121 psi Service limit

14 psi Maximum difference between cylinders

like a cap full my shop manual from mits says that service limit is 114 for turbo 90-92 im not happy with where it is but what can u do...i also have 272s though so shouldnt that change the compression numbers? im pretty sure it does...im goin to drop my 720ccs in and do a base tune and see how long she lasts.....if she blows up she blows up im almost expecting it DAM DSM

 

[mattasi]

haha go for it. At least the numbers are all close, and being above the sevice limit, I think you have the right idea. Run it.

 

[RvlutionMtrsprt]

Curious, did you do your comp test on a hot or cold motor? Also, did you unplug spark/fuel and go 100% throttle while testing the cylinders?

 

[Blaze4G63]

Curious, did you do your comp test on a hot or cold motor? Also, did you unplug spark/fuel and go 100% throttle while testing the cylinders?

engine was at normal operating temp and i pulled the fuse for the fuel i pulled the MPI fuse on the battery cable....was not at wide open throttle though.....

 

[MY1GDSM]

Do it again with the Throttle open all the way.... bet you'll see a bit better numbers
Also regardless of the condition of you motor adding oil is gonna bump you comp. Numbers as we have recessed dished pistons(low comp) its the high comp. Guys that can get an idea about whether there ring are going out like that....

Fyi if you want a tune thats not gonna blow your motor shoot me a PM....