Piston Deck Height Question

[balla48801]

First off i will tell you my setup. I have a 4g64 block w/ custom rre spec'd wiseco pistons, crower rods, and 4g64 crankshaft.

I am currently building the block and have measured rod bearings clearances, mains bearings, crank end play, piston to wall clearance, and rod side to side play. Everything is perfectly in spec. If you want any of the specs just ask and ill post them. This is my first engine build, but i have been around this kind of work for a long time and have done research on the internet for years. Ive had a 3gen eclipse for 5 years now and have done extensive amounts of work on it. I know alot of guys on here dont care too much for the 3gen but if you could give me a little advice i would really appreciate it.

Here is my concern. I just yesterday installed my pistons/rods in the block. The dot is facing the timing belt side and everything is tq'd to spec. One side of the piston sticks up out of the block .007" at tdc. I was really concerned when i saw this. The HG i will be using is a cometic 1.3mm for the evo. So that will give me a good amount of extra room there. But is there something wrong w/ that picture? Shouldnt both sides of the piston sit flush w/ the top of the block and not protrude out the top of the block any?

I am almost wondering if the machine shop re-surfaced this block crooked or something.

Any info from some of you old timers would greatly be appreciated.

Thank you

 

[balla48801]

And a little more info. These pistons are 8.8:1 c/r. The engine is being built for boost. I made and installed a custom turbo setup about a year ago.

 

[balla48801]

Ok i talked to a rep at wiseco today. They said that as long as when i clay the pistons i have a min of .030" piston to head clearance i will fine.

 

[kiggly]

Make sure both the left and right side of the piston stick up the same amount. I'm not talking about rock front-back, I'm talking about off-square left-right. I have a set of crower rods that needs to be rebushed because they were machined wrong. They have about 0.25deg angle of the wristpins off-square compared to the rod beam and big end. This was a difference left-right on piston height of about 0.015".

Kevin

 

[balla48801]

ok i will check that

thanks