Thread: Compression Numbers
05-29-2009, 04:12 PM #1
I did a search on Compression numbers but really didn't find what I was looking for so I'll ask this basic question here...
This would be on a Stock engine, or mildly modded with Thru-Hull Exhaust and Free-Flow Intake if that would make any difference.
4-Tec 215h.p. S/C'd Engine: ???
4-Tec N/A'd Engine: ???
Checked warm or cold ?
Other 2 plugs removed or does it matter ?
Thanx in advance for your input(s)
05-29-2009, 05:32 PM #2
Would like to know also. My #s are 100-98-102 I think thats low?
05-29-2009, 05:38 PM #3
- Join Date
- May 2008
Mine cold were 150 for all three
05-29-2009, 05:40 PM #4
I just did mine stock engine 56 hours.
Throttle wide open
All spark plugs removed.
140 across the board.
Next I did a leak down test and it was 6% across the board.
05-29-2009, 05:51 PM #5
throttle wide open
60 hours on motor
Left other two plugs in and remove one at a time for testing
05-29-2009, 06:29 PM #6
Are these numbers all for the Supercharged 215 engine ?
Is it best to check compression on the 4-Tec Cold or Warm ?
05-29-2009, 06:40 PM #7
05-29-2009, 09:46 PM #8
How could all three be so low? maybe my gauge is bad
05-29-2009, 09:57 PM #9
- Join Date
- Jan 2006
- Rydal, Georgia U S A
05-29-2009, 10:08 PM #10
Took compression 2 hr after running still warm with 2 plugs in never touched timing Ski runs good
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