i just put 700 on a freshly built gsr motor with 9:1 pistons my compression read
1#175
2#135
3#152
4#152

do i need more mileson the motor to sit the rings and i have done the valve adjustment twice just to make sure is what right. What should i do need help please.

 

Run it hard let the rings seat.

 

Something isn't right... you should show #'s close to each other. When I put my JE pistons (8.8:1cr in a b16a2) before I started it I showed 170psi for each cylinder.

 

once u heat cycle the motor, the rings are seated for good.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by crush &raquo;</TD></TR><TR><TD CLASS="quote"> What should i do need help please.</TD></TR></TABLE>

your next step is to get a leak down test...

edit: actually, if the motor runs good ie: good tune, no smoke, no leaks, no coolant oil mixing, pulls hard, then I would just drive it a bit more. follow posted breakin methods such as reving up to 4krpm then let off gas and alow car to slow down from back pressure only, repeat for 5k, 6k, etc...

if everything seems to run fine then check your compession again at 1k miles. if the numbers are still not close to each other then do the leak down test...