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Thomas G
Alfa Arna
Joined: 27 Apr 2003
Posts: 7
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 Posted: Sun Apr 27, 2003 12:24 am Post subject: Compression figures |
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Hi all.
Anybody who can help me with some compression figures (hope its the right word) on a 1,5 boxer (105 bhp)?I have just tested mine,and the figures/pressure are : 185-185-185-205 psi (in bar that is 3 x 12,76 and 1 x 14,13 bar).I did the test with "hot" engine,all 4 spark plugs out,and with full throtlle.Is it good or bad,and what about the difference on one cylinder on 20 psi/1,37 bar?
Regards
Thomas G. Nielsen,Denmark |
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Admin
Site Admin
Joined: 19 Feb 2003
Posts: 1223
Location: Stafford, UK
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| Posted: Sun Apr 27, 2003 12:39 pm Post subject: |
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Hi
Looking at the Dutch manual it looks like minimun compression is 10.3 bar
The difference is a minor concern, but as that is high I would be tempted to recheck that cylinder.
All the best
Keith |
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Thomas G
Alfa Arna
Joined: 27 Apr 2003
Posts: 7
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| Posted: Sun Apr 27, 2003 1:08 pm Post subject: |
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Thanks Keith,looks like the compressions is okay then.About the 4th cylinder with the higher presure,I have checked it 3 times (like the other ones),so ......?
Regards
Thomas G |
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Admin
Site Admin
Joined: 19 Feb 2003
Posts: 1223
Location: Stafford, UK
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| Posted: Sun Apr 27, 2003 9:31 pm Post subject: |
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Hi
Not sure. Wasnt the last cylinder you checked was it? Maybe it had drawn some fuel in by then and had managed to seal the rings a bit better. The readings are basically within 10% so I wouldnt worry
All the best
Keith |
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