I did a compression test a few weeks ago and think I did something wrong since my numbers seem wrong. When I tested the engine I cranked the starter for about 10 turns for each cylinder. My results were 205psi per cylinder with number 2 cyl. reading about 204psi, very consistent. When I told my father of the results he said that those numbers were too high and that I must have tested it wrong. He then tested it, cranking the engine about 5-6 turns per cylinder and got 187psi across the board. Which numbers are right? And are they acceptable numbers coming from a b16a?

Thanks.

 

my 10.2 comp. b16 had 215/220 across the board.
205 is ok 187 low, more importantly is consistent wich is good.

 

Thanks for the info. One more thing... How many times should I crank the engine when testing the compression? Is 10 fine? Should I keep cranking until the gauge quits rising?

 

He has a JDM engine, the comp is 10.4:1

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Hybridize &raquo;</TD></TR><TR><TD CLASS="quote">Thanks for the info. One more thing... How many times should I crank the engine when testing the compression? Is 10 fine? Should I keep cranking until the gauge quits rising?</TD></TR></TABLE>

5-10, no more needed...

 

I had 220+ each cylinder... worst being 220, best being 230. A recent test showed 215+ all across, so I think I may have carbon deposits. Raene had 215 or so evenly, I believe, and his motor runs really strong.