M20 engines
Moderator: martauto
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Charlie30
- E30 Zone Newbie
- Posts: 1
- Joined: Fri Nov 23, 2018 10:25 pm
Just wonder dose a 885 head fit on other m20 bottom ends or just the 2.5
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Brianmoooore
- E30 Zone Team Member
- Posts: 49359
- Joined: Mon Jan 10, 2005 11:00 pm
2.0 litre has smaller bore pistons, and the shape of the crown is wrong. 885 fits on the standard 2.5 and the 2.7 with the right shaped pistons.
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Steve
- E30 Zone Team Member
- Posts: 13160
- Joined: Sun Dec 19, 2004 11:00 pm
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reggid
- E30 Zone Squatter
- Posts: 1983
- Joined: Mon Jul 11, 2005 11:00 pm
- Location: Oz
it's one of those things, just because you can doesn't mean you should......the m20b25 and certain m20b27's have a specific piston shape that matches the combustion chamber of the 885 it optimizes combustion turbulence by using squish improving power and resisting knock as well as improves fuel vaporization by moving the combustion volume closer to the exhaust valve with the offset dish improving thermal efficiency.
the m20 has enough working against it so its not wise to add things to the list by reducing the effectiveness of various systems
the m20 has enough working against it so its not wise to add things to the list by reducing the effectiveness of various systems
E30 325is with M20B31