What to use for 8.1 commpresson on turbo Motor

[YermanCars]

I am in the process of rebuild the motor (top end)

it is currently 1984 3.2 turbo @9.5:1

what are my options to achieve 8.1:1 compression

Thank You

[asphaltgambler]

If you have good ring seal you could install a different set of cams that would A) Be compatible with a street turbo set-up and B) Bleed off some of your existing cylinder pressure which will have the same effect as reducing the mechanical compression ratio.

PM John (Camgrinder) for advise

[YermanCars]

How about Mahle 98mm turbo pistons?

[MotoSook]

Tony,

I am having my cylinders bored and Nikasil plated to match 98 mm JE pistons. I'm not going to go as low in CR as you will, but I believe the JE pistons can be ordered with the CR you want.

I'm building a 3.4 Turbo.

[YermanCars]

I wanted to do what wydryd was interested in
Boring from 955mm to 98mm

[MotoSook]

If you mean by boring and replating..that's what I'm doing.

[WERK I]

Does anyone have a pic of a JE 98mm piston dome? I was wondering if they do custom compressions AND custom domes for those of us that have twin-plugged our engines.

[DonE]

I had JE make custom pistons for me. You can see a pic at:

http://www.brookstonefarms.com/930rebuild_page2.htm

I am building a motor that has a stroked (964) crank, super 964 cams, custom 98mm pistons and 3.2L cylinders bored out to 98mm (better cooling than the 3.3 cylinders and A LOT cheaper than Mahle).

The compression is 8.0:1 with very little dome on the pistons.

[WERK I]

Thanks, Don