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Cylinder Compressions 
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On the Road

Joined: Tue Jun 17, 2008 9:11 pm
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Post Cylinder Compressions
I took a notion to check my cylinder compressions today and they are 180 - 185 cold and 210 - 215 hot. Does that seem about right for a 1312 A series with 1500 miles on the clock? I didn't expect them to be as high as that. It's standard spec apart from the rebore and (I think....!) a Piper 285 cam. Cheers.

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Fri Jul 08, 2016 8:17 pm
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On the Road

Joined: Wed Jul 31, 2013 11:47 am
Posts: 893
Location: Kano north Nigeria
GTM: Cox/Coupe
Post Re: Cylinder Compressions
That's good, the more you squeeze the bigger the bang :)
John


Sat Jul 09, 2016 7:38 am
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Joined: Fri Sep 14, 2007 10:34 pm
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Location: In the workshop
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Post Re: Cylinder Compressions
Yep sounds good, do you know what compression ratio you have as a high ratio gives higher readings

Neil

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Sat Jul 09, 2016 5:07 pm
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On the Road

Joined: Tue Jun 17, 2008 9:11 pm
Posts: 671
Post Re: Cylinder Compressions
I have no idea what the compression ratio is :oops: It's good to know that they're ok, though, given the hassles I had with the darned thing smoking really badly when it was first fired up after its rebuild - it still produces a little blue smoke after ticking over for a bit when it's stinking hot. The first MOT is due in a few weeks time so I'll have to take it for blast to clean it out on the way to the garage :mrgreen:

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Sat Jul 09, 2016 8:10 pm
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