B18C1 Compression

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May 1, 2002 | 06:32 PM

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angeljrusf

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Ive got 159000 miles on my motor and getting an average of 210 across all four pistons... any thoughts on that or if thats good compression bad compression?

Any help is appreciated.

May 1, 2002 | 06:57 PM

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ghuey

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Very good.

~Guy

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May 1, 2002 | 06:59 PM

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angeljrusf

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Thanks.. anyone think that the head might be milled to be yielding that kind of compression.

May 1, 2002 | 07:59 PM

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hybridEG

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yeah a low compression number for a b18c1 is 25% the stock compression wich i think the stock compression is 270 by the manuel never acually seen it that high. so your good the low is 140 by the way.

May 1, 2002 | 08:04 PM

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quicksilver EK

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ive never seen a stock b18c put up 270 an ive heard that its really not that often if ever that they do.mine with the gsr internals with 30k miles on it did a solid 225 across the board that was a 2000 gs-r

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May 1, 2002 | 08:52 PM

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Bill

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Quote:

Originally posted by "Someone"

Originally posted by angeljrusf
Ive got 159000 miles on my motor and getting an average of 210 across all four pistons... any thoughts on that or if thats good compression bad compression?

Any help is appreciated.

210 across all four with 159000 is damn good.

May 2, 2002 | 05:48 PM

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angeljrusf

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Thanks for all your help Im exploring options with my motor and I want to get an idea of what kind of shape its in.

May 3, 2002 | 08:24 AM

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Bill

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Quote:

Originally posted by "Someone"

Originally posted by angeljrusf
Thanks for all your help Im exploring options with my motor and I want to get an idea of what kind of shape its in.

Well regardless of the compression youve got to take into account the wear of parts such as bearings and seals. No matter what way you look at it 159000 miles is quite a lot of wear on a motor. Before doing something drastic Id suggest refreshing the entire setup or else youll just end up doing a complete rebuild/repair sooner than later.

May 3, 2002 | 08:34 AM

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angeljrusf

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Ya... that ones a given.. Im considering boost in the future and I was planning a complete re-build but Im trying to do boost and re-build when my current set up has about had it.. I think judging from the compression its gonna be a while and I dont mind because its pretty quick how it is now.

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