You probably know this ...but, make sure all the metals are in the same temperature range and are around 72 degrees F. Good job skipping the play time and doing work!

 

Every thing was stored in the garage and was the same temp, 71-74* as measured with my laser thermometer through out the process.

 

On another note, Wiseco did not give me good news yesterday. The tech said .0065 was too much for anything other than full race with these pistons. He also stated that my clearance was probablly more like .0070 as the pistons should have measured 4.0315.

 

If the machine shop messed up the bore size why not see if they will do a rebore for free? I am sure there are plenty of 4.065 pistons off the shelf you could use........

 

Have you thought about JE? They make awsome pistons as well. And I would concider maybe loosing my clearances on my bearings a bit. Pics look like they were trying to smear a bit, but excellent choice going with the king bearings. Every motor will be just a touch different and may like just a touch more or less than another identical to it. Just my thoughts.

 

4.065 is a little thin on a 6.0L block running a good bit of boost. My machine shop seems to be having a hard time doing a simple hone job, I surely don't trust them to do a sonic test for wall integrity. If they indeed messed up the bore, I will put them on the hook for a new set of custom 4.040 pistons and have another shop do a torque plate hone on it.

 

Looks like JE's shelf pistons jump from 4.030 to 4.065. If they had a 4.040 shelf piston, I wouldn't hesitate to use them.
As to the bearings, from what I've read, performance builds shoot for .0025-.0030 on mains and slightly less on rods. My mains are right in that range currently. Unfortunately, I did not get previous clearances before the crank was turned.

 

I did not get good news this weekend when I torqued the mains and heads to get the distorted bore measurements. My results...

 

Hope your luck turns around bud .

 

sorry to see that happen good luck on your rebuild