Welcome to the SR20 Community Forum - The Dash.
Register
SR20 forum logo

Thread: SR20VE compression test numbers...

+ Reply To Thread
Posts: 51-58 of 58
2015-02-20 03:17:58
#51
My 2.2L 90mm 12.5:1 turbo motor pegged my compression gauge past 300psi High comp plus boost and e85 was a blast.
2015-03-13 01:47:31
#52
I've started doing a compression test on by VVL (forged pistons,12.5:1 CR 87mm, N1 cams) First was 260, second maxed the tool at 300, so I stopped. Doing something wrong?
2015-03-13 02:58:32
#53
Originally Posted by markslc1
I've started doing a compression test on by VVL (forged pistons,12.5:1 CR 87mm, N1 cams) First was 260, second maxed the tool at 300, so I stopped. Doing something wrong?


Look 1 post up.
2015-03-13 14:52:16
#54
SR20VE compression test numbers...
Good point if reference. But wondering what is normal/expected.


Sent from my iPhone using Tapatalk
2015-03-13 17:11:43
#55
Originally Posted by markslc1
Good point if reference. But wondering what is normal/expected.


Sent from my iPhone using Tapatalk


Check them all when hot, let it crank until the needle does not go up any higher. In my 12.5:1 88mm N1 motor i pegged the 300psi gauge on all 4. Do a leak down test next, this might help see what is going on.
2015-07-18 10:32:21
#56
new sr20ve, n1 pistons, vet metal headgasket, n1 cams, warm reading.

[URL=""][/URL]
2015-07-18 22:07:12
#57
Originally Posted by sss4me
new sr20ve, n1 pistons, vet metal headgasket, n1 cams, warm reading.

[URL=""][/URL]


Holy arm hair! Didn't know samsquatch could perform a compression test! Very nice numbers, looks healthy and I see some other goodies in the pic. Nicely done
Last edited by zeneffect on 2015-07-18 at 22-08-52.
2015-07-19 19:16:25
#58
doing one plug at a time reduces the cranking rpm.

if all the plugs are out you will see better numbers. take out all the plugs and pull the Dist plug(cas), this prevents the injectors firing and spark events as well, then proceed with your tests. the most important value is the closeness of the readings cylinder to cylinder, IIRC 10~15psi is good, less is better.

As other members have mentioned, a warm engine & open throtle is how u do the test and would allow all to compare apples to apples and so be meaningful and helpful to the community.

If you are not at sea level or close to it, mentioning that will help as well, persons at high altitude are not going to get the same comp readings.
+ Reply To Thread
  • [Type to search users.]
  • Quick Reply
    Thread Information
    There are currently ? users browsing this thread. (? members & ? guests)
    StubUserName

    Back to top