Euro C/R JE Piston question

[Monza_dh]

I am in need of new pistons for my '88 3.2 after some bad piston slap. The plan is to re-nikasil the cylinders and have a set of JE pistons to match . I am currently running a euro premuffler and sport exhasut with 964 cams.

My wrench mentioned having custom JE pistons done at 10:3 C/R. I do not want to go down the twin plug route and after seeing many posts on Mahle's vs, Nikkis, vs Max Mortiz pistons I cant seem to find anyone with stock 95 Mahle cyliinders running 10:3 JE pistons. Is a reason for that?

I also plan on having Steve Wong make a chip for he set up as I can get 93 octane and he recommended sticking with stock C/R because of the the dome design of the JE pistons.

Any input on a 10:3 C/R with JE and Mahle's? Should I just do a 98 piston at 9:5?
thanks

[prschmn]

I'd stick with the 9.5s JEs. They have a "flat" dome that will just shroud the chamber too much
at higher comp. ratios. Moritz used an angled dome to try to alleviate this.

[Monza_dh]

Thanks Mark, any benefit of going to 9"8 or 10? or dont bother?

[prschmn]

Before anything I'd love to know how you got piston slap on a 3.2-not normal unless
it's got a zillion miles. Are these K E jugs?

[Jeff Alton]

If getting them replated and purchasing new JE pistons, consider boring to 98mm for a 3.4.

[Monza_dh]

Originally Posted by prschmn

Before anything I'd love to know how you got piston slap on a 3.2-not normal unless
it's got a zillion miles. Are these K E jugs?

It has a 100k miles and when i bought it out of state 10 yrs ago id needes a valve job real bad but they only reringed the pistons as eveything was in spec. Should have replaced pistons then as well.

[Monza_dh]

Originally Posted by Jeff Alton

If getting them replated and purchasing new JE pistons, consider boring to 98mm for a 3.4.

Thats what im thinking. So running 98mm on single plug at 9:5 will be that much more noticeable for low end torque than 95mm?

[faapgar]

JE will build you a 98mm Max Moritz 9.8 that will work just fine.Add your chip from Mr.Wong & do not look back.Add just an aluminum flywheel and enjoy.Fred