Author	Subject: Compression question.
stainbox12 Newbie Location: Panama Registered: 28 May 2010 Posts: 6 Status: Offline	Post #1 Anybody knows whats the compression between cylinders for xu7jp engine? My numbers were between 85-90 psi in all cylinders. Is that too low? or its ok. Thanks.
Posted 31st May 2010 at 07:04 Profile

oldbrownshoe Seasoned Pro Location: Holon Israel Registered: 08 Aug 2008 Posts: 1,795 Status: Offline	Post #2 yes, very low. the CR of this engine is 9.3 and the numbers should be in the rang 150-200 PSI . http://en.wikipedia.org/wiki/Compression_ratio ________________________________________ French military victories? Did you mean French military defeats?
Posted 31st May 2010 at 11:52 Profile

stainbox12 Newbie Location: Panama Registered: 28 May 2010 Posts: 6 Status: Offline	Post #3 hmmm ok... that might be then, the reason why the car wont start. I did a the comp test followed by dropping some oil into the cylinders, and the comp didnt raise up. What could it be? valve adjustment? timing? The head has been renewed.
Posted 31st May 2010 at 12:30 Profile

oldbrownshoe Seasoned Pro Location: Holon Israel Registered: 08 Aug 2008 Posts: 1,795 Status: Offline	Post #4 read here: http://www.custompistols.com/cars/articles/compression.htm http://community.boxwrench.net/engine-rebuilding-forums/viewforum.php?f=9 ________________________________________ French military victories? Did you mean French military defeats?
Posted 31st May 2010 at 13:15 Profile

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