I am buying a 1997 gsr motor and the compression is 180dry, and 210wet. What is the difference between the two, and what should a good compression be for this motor? I am getting it tested in the morning and need to know what to look for. Thanks in advance James

 

that is normal for 10:1

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by MikeSarr_GSR &raquo;</TD></TR><TR><TD CLASS="quote">that is normal for 10:1</TD></TR></TABLE>

really? I thought most GSR owners are reporting 210-215 dry, consistent across all the cylinders? I did a test a few weeks ago, got something like 185, 180, 155, 160 for my dry test, then 210's with a wet test. Helloooooooooo new piston rings?

 

sounds normal to me. i tested between 210-220 with the engine warmed up.

 

correct me if I'm wrong, but a dry test = just a normal compression test, and a wet test = adding a capful of oil into the cylinder before you do a compression test? Something about sealing the piston rings temporarily if they're worn?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tilt &raquo;</TD></TR><TR><TD CLASS="quote">sounds normal to me. i tested between 210-220 with the engine warmed up.</TD></TR></TABLE>

Same.

220psi all across on mine with 75k miles

220psi all across on my friend's GS-R with 98k miles

Both were warm and followed proper standardized compression test procedure with a Sears Craftsman gauge.

 

I got 220+/- a few on all 4 cylinders on my 94gsr with 120k miles.