Are these JE 8.5cr pistons?

[V6quattro]

Hy. I bogt a set of 81.5mm JE pistons with a 8.5 Compression ratio. But when i compare them whit the original S2 pistons from my ABY engine the are about the same? Can someone tell me of these are real 8.5?

Tanks.

[gnutz2]

Yes they are real pistons

Honestly they're not OE pistons, i'm pretty sure you have a set of 81.5mm forged JE pistons.

[mcandmar]

I think hes asking about the compression ratio, are they 8.5 or stock 9.3 or whatever it is.

You have the serial number, why not ask JE directly?

[V6quattro]

Yes i was worried about the compression ratio. The original S2 pistons are 9.3:1 and the JE's are 8.5:1. Bud by the looks of the pistons the are about the same at compression ratio.

I forget to take a look at the JE website . This is what i get:
http://www.jepistons.com/Products/279846.aspx

So i looks like the are 1:8.5 . Only thing i don't get is at the JE website they are for a 81.5mm bore. But the spec. sheet i have from JE the bore has to by 81.51mm? Why is that?

[Jamo]

Yes i was worried about the compression ratio. The original S2 pistons are 9.3:1 and the JE's are 8.5:1. Bud by the looks of the pistons the are about the same at compression ratio.

I forget to take a look at the JE website . This is what i get:
http://www.jepistons.com/Products/279846.aspx

So i looks like the are 1:8.5 . Only thing i don't get is at the JE website they are for a 81.5mm bore. But the spec. sheet i have from JE the bore has to by 81.51mm? Why is that?

It shouldn't matter, when you have your block rebored it should be done to the physical size of each individual piston not the box size

[V6quattro]

So i have to give the pistons to the machine shop. So thy can masseur each piston and make sure the get the 0.10mm piston to wall clearance?

[quattro84]

Yes.

[V6quattro]

Ok thank you all