 compression numbers, how bad are these |
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| mobymutt |
 Oct 8 2017, 06:46 AM
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Senior Member  Group: Members Posts: 553 Joined: 16-December 13 From: Kingston, Ontario, Canada Member No.: 16,770 Region Association: Canada  |
Just did a compression check, here's what I measured:
108, 120, 96, 85 I've got a stock 1.8L, but would like to build a 1911 or 2056 in the relatively near future. Hopefully I'll be ok for another year or so with the current setup. |
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| iankarr |
Oct 8 2017, 02:27 PM
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The wrencher formerly known as Cuddy_K Group: Members Posts: 2,566 Joined: 22-May 15 From: Heber City, UT Member No.: 18,749 Region Association: Intermountain Region 
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If you separated the pistons and jugs and didn't replace the rings and hone the cylinders to like-new (fresh crosshatch and no scoring) that could be a major cause of reduced compression numbers. The rings are "mated" to the cylinders and, once apart, that close fit is gone until you hone (or cut), re-ring and go through a seating break-in.
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Posts in this topic
mobymutt compression numbers Oct 8 2017, 06:46 AM
914Sixer Looks like time to rebuild. Go for the 2056. Oct 8 2017, 07:02 AM DM_2000 Do a leak down test, that wil let you know where t... Oct 8 2017, 07:13 AM rgalla9146 A leakdown test should be done as well. It will gi... Oct 8 2017, 07:48 AM
malcolm2
The compression test should be done after a p... Oct 8 2017, 04:14 PM mobymutt Full disclosure: I did just have the engine apart,... Oct 8 2017, 08:31 AM rgalla9146
Full disclosure: I did just have the engine apart... Oct 8 2017, 09:11 AM Morrie
Full disclosure: I did just have the engine apar... Oct 8 2017, 10:56 AM porschetub
Full disclosure: I did just have the engine apart... Oct 8 2017, 01:53 PM DM_2000 I don't do the often repeated "add oil to... Oct 8 2017, 04:05 PM mobymutt Thanks to all for the responses (and patience, as ... Oct 8 2017, 04:17 PM Mark Henry Start saving some coin Matt, likely there's go... Oct 8 2017, 05:17 PM mobymutt
Start saving some coin Matt, likely there's g... Oct 8 2017, 06:42 PM injunmort consider the tangine racing cable set up rather th... Oct 8 2017, 05:23 PM mobymutt
consider the tangine racing cable set up rather t... Oct 8 2017, 06:39 PM |
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