84 mm piston ?

[miafori]

Is there any V6 or V8 American engine which uses 84, 85, 86 mm diameter piston ?

[EMC]

Originally Posted by miafori

Is there any V6 or V8 American engine which uses 84, 85, 86 mm diameter piston ?

Probably...but then you would need some custom rods.
Why not have custom pistons made up. In the end it will probably save a lot of money and hassle.
Just remember to get the pistons, THEN have the cylinders honed to match.

[Glucas21]

The only ones I know of are In-line 4 cylinder engines. Most pistons that size are in import engines, usually In-line 4 and 6 cylinder ones.

Chevy 1.8 Liter 4 cylinder - 84mm

Ford 2.0 Liter 4 cylinder - 86mm

What are you trying to do? Hope this helps.

[orijinal_poser]

hey EMC, what size turbo do you use for your 332i or whichever car is in your sig?

[miafori]

I mean that is it possible to find a forged piston from V8 or V6 engine for BMW ? Is it absurd thing ? any choice from ebay ? What are the alternatives for M20 turbocharged engine pistons in the market? What do most of people use? I meet lots of turbo BMW at forum pages.

[matt325is]

There is a guy in europe who is using an M42 (e30 318is) piston in his m20 engine for lower compression (the m42 rod is longer than the m20). I dont believe he has seen any problems with it. Would be a good idea if you are looking for lower compression for FI.

I'm using Ross Racing 85mm 8.5:1 compression forged alum pistons. I bought them through Ireland Engineering for $939, they might be cheaper now. I am using hte stock rods (have held up so far. lots of HP).

matt

[miafori]

hmm, I consider M42 and M40 pistons. I think M40 engines were not available in US market. M40 is better (not 16v) and cheaper choice. But I am searching for more stronger pistons for the future.