Topic: 3rz compression question

[kauaikid]

I just rebuilt a 3rz block and had engnbldr rebuild the head.  I'm having difficulties tuning it with the SDS pro fuel injection kit which i used from LCengineering and so i started checking other areas of the motor for problems.  I dry compression tested it today and got 150psi on every cylinder.  I know it's good that they're all the same but I also know that it's supposed to be 178 normally and a minimum of 124psi.  What do you guys think about it being at 150 after just being rebuilt and its got less than 20 miles on the rebuild.  Thanks

[kneedownnate]

I'm gonna go out on a limb and say the compression numbers will appear low until the rings have seated 

[BUDDERS]

I'm gonna go out on a limb and say the compression numbers will appear low until the rings have seated 

X2

[79coyotefrg]

like Nate said,  the engine has to get broken in before you'll get big numbers on compression.  after you get 500 miles on it then recheck compression.

[kauaikid [OP]]

thanks guys! I was getting nervous especially because i couldn't get the engine to barely run.  Now for the dumbass of the month move- After messing with this thing for a couple of days and quite a few phone calls to LC and SDS i brought the truck to a shop only to find out after i made my spark plug wires i didn't bother hooking them back up correctly to the coil packs  .  As soon as i switched them and got over feeling like an idiot i started the motor and it just purred and the power is outstanding.  I'll be smiling for the rest of the day!  Thanks again for the responses

[BUDDERS]

I'd like to see some dyno #'s on your motor with that SDS system too.....

[kneedownnate]

Any updates?