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Help me with these comp. test numbers...

  • Thread starter Thread starter Nosboss
  • Start date Start date Nov 3, 2008
N

Nosboss

New Member
Dec 17, 2007
115
0
0
Nov 3, 2008
#1
  • Nov 3, 2008
  • #1
So I feel like my engine is down on power. I did a compression test today and need to make some sense of the numbers. I did it dry and then wet with a squirt of WD40 in the cylinders. My engine is a 306 and has 58cc combustion chambers and 9.5-1 compression ratio. Here are the numbers I got...

Dry cyl 1-8

145
132
140
142
147
144
146
142

Wet cyl 1-8

150
142
145
144
149
150
150
143
 

hotcobra03

Active Member
Nov 29, 1999
969
4
39
poteet,tx
Nov 3, 2008
#2
  • Nov 3, 2008
  • #2
Engine hot or cold?
 
N

Nosboss

New Member
Dec 17, 2007
115
0
0
Nov 3, 2008
#3
  • Nov 3, 2008
  • #3
Cold. I drove it yesterday and then it sat all night and most of the day before I did the test.
 

woodsnake

15 Year Member
Jan 16, 2007
1,352
15
69
Hicksville, NY
Nov 3, 2008
#4
  • Nov 3, 2008
  • #4
I would say they look pretty good. All within just a couple of pounds of each other.
If you had any variation over 15% you would have to look for the cause......
 
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