Chopping \"J\" Block

What is the difference in 'J' piston and KZ piston wrist pin centerline relative to the top of the piston?

Alternatively, how much do I need to take off a 'J' block to use KZ pistons and bring the top back up to 'normal' in the bore?

As best as I can tell it's looking like 1mm will do the trick.
Confirmation???

Is it OK to take this mm off the top or should I pull the liners and take it off the bottom?

Thanks,

-Duck

It is closer to .055". If you take it off the top, you will make the o'ring groove shallow.

If you are using K pistons in a J motor, you will be down on compression because the J combustion chamber is larger, and the valve pockets are not right for the J head.

Jay

Jay-

Thanks. I'm not doing anything yet. Still thinking about what to do. Pistons are in the photo. I'll try to measure how much of the J chamber they fill this weekend. I've already been advised to round off all the sharp edges on the top if I use them.

I may just save them and wait until a KZ motor turns up. They are very light weight.

Here is photo.



-Duck

Post edited by: Duck, at: 2006/04/28 20:46