Pistons and rods

Jesusdroveawestfield · Thu Mar 04, 2004 10:54 pm

You can no longer buy original Starion pistons. I have a perfect set for sale with conrods. I replaced mine with forgies. Only 80,000 k's on them
$500. Buyer if in Sydney can have a block and head with purchase as well.
Both in perfect condition.

mrb1 · Post by **mrb1** » Fri Mar 05, 2004 9:20 pm

Are they +1mm oversize or standard? Also are they 7.6:1 or 8.5:1? The replacement pistons that were around a while back were 8.5:1 the same as the import 4G63T SOHC engines (with the jet valves).

Cookiemonster · Post by **Cookiemonster** » Fri Mar 05, 2004 9:33 pm

They would be standard 7.6:1 pistons... original factory pistons from his JD Starion with 80'000 k's on the clock.

mrb1 · Post by **mrb1** » Sat Mar 06, 2004 9:10 am

Cookie,
JD's were 8.5:1 compression.

Cookiemonster · Post by **Cookiemonster** » Sat Mar 06, 2004 9:33 am

Really? Are you sure?

If thats the case then they would be 8.5:1 pistons. Can we get verification that JD's ran 8.5:1 ratio from the factory?

SIRIUS · Post by **SIRIUS** » Sat Mar 06, 2004 3:11 pm

JA-JD were all 7.6:1 compression.....

SIRIUS · Post by **SIRIUS** » Sat Mar 06, 2004 3:13 pm

not sure about import engines...but 7.6 is for all the australian engines

mrb1 · Post by **mrb1** » Sat Mar 06, 2004 4:25 pm

I thought they were 8.5:1? Anyhow memory fades with age they say! Perhaps somebody has an old JD sales brochure and can check? Jesusdroveastarion can you take a photo of the top of your JD piston and post it on the list or PM me?

cheers,
Mark.

Cookiemonster · Post by **Cookiemonster** » Sat Mar 06, 2004 6:12 pm

Im pretty sure they are all 7.6:1. But im old so *shrugs*.

CussCuss · Post by **CussCuss** » Sat Mar 06, 2004 10:15 pm

i was under the impression that compression was bumped up to cope with the lack of power from the changes.

mrb1 · Post by **mrb1** » Sat Mar 06, 2004 11:03 pm

CussCuss,
that's what I seem to remember too. Lots of *shrugs*. :roll:

NXTIME · Post by **NXTIME** » Sun Mar 07, 2004 12:15 am

I'm old as and I can't even recall what this topic is about.

But I will add some useless info and comfirm that both JA and JB G63BT engines came with 7.6:1 compression pistons. :D

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