m20b25 pistons

[Streichholzschächtelchen]

It's driving me crazy but somewhere I swear I saw a thread saying that after 87 the pistons were slightly different for 325i's. Can somebody clarify? I've searched til the words on the screen stopped making sense. :weak:

[Streichholzschächtelchen]

nevermind, finally found it. http://www.r3vlimited.com/board/show...hlight=pistons

[Streichholzschächtelchen]

If I take my 1987 325is, using the original 885 head, m54 89.6mm crank and rods, what pistons are possible? Which pistons would be recommended for a naturally aspirated high compression ratio build? Oh, and just for kicks what would the compression ratio be on a normal eta (flat piston, not domed like the super eta) with the 885 head?

/talking to myself

[nando]

custom JE pistons?

[Streichholzschächtelchen]

Fingers still crossed that something else will work, I'm on a r3v budget haha.

[vr2jetta]

If you know all the specs plug it into here.

http://www.cbperformance.com/enginecalc.html

[Streichholzschächtelchen]

Thank you! Still unsure on which piston would be optimal though, gonna have to keep plugging away I guess.

[TheB1G Lebowski]

If you are wanting a high compression then you would really want a dome piston.

[Streichholzschächtelchen]

Understood. The early euro eta pistons have a slight step, the i's and seta pistons are domed so I'm trying to figure things out as to which is optimal for my plans.

[TheB1G Lebowski]

Just remember clearance is your friend. lol.