[brainfood]

I have to give the size for my forged piston upgrade and I was wondering if anywhere on the stock pistons it has the size stampped so I can be sure that it wasnt overbored at the last rebuild 30k ago?

 

[Rick92VR4]

Brian - no they usually aren't stamped with the size. Take one to a machine shop and have them micrometer it to tell you the size (I'll be stock). Or you could micrometer the bores (usually how it is done).

 

[pokey]

The stock bore is 91MM. But depending on which pistons you buy, you havta know the clearances before you bore.

My Ross's need a .0006 thousandnths clearance.

 

[brainfood]

are they forged ross replicas? thats what I am getting... what do the stock pistons need as far as clearance?

 

[Jeff Lucius]

You know the Mitsu Engine Overhaul Manual is available for <B>FREE</B> on the internet courtesy of Vinny Singh.

http://www.twingles.com/manualcd/dsmgift/

Pokey,
Do you mean 0.006"? Less than 0.001" is very rare (and unsual) for forged pistons. The stocker cast pistons want like 0.0008 - 0.0016". My venolia want 0.005". Also, stock bore is 91.1 mm (3.587") - according to the overhaul manual.

 

[brainfood]

thanks jeff that will help alot...

 

[brainfood]

Hey jeff that is just the service manual for a 91 talon... I already have the service manaul for my car...

 

[Rick92VR4]

go down further on the page to 6g72 that's what Jeff was pointing to.

 

[brainfood]

thanks I guess I blew that

 

[Rick92VR4]

How do you think I know? Started to download all that DSM stuff before looking further.