5-Series (E12,E28, E34, E39, E60)Chat relating to the BMW 5-Series of all generations. Specific models include: BMW 518, BMW 520, BMW 520i, BMW 530i, BMW 528i, BMW 530i, BMW 518i, BMW 524d, BMW 525i, BMW 525e, BMW 528e, BMW 540i, BMW 535i, BMW 520d, BMW 525td, BMW 525d, BMW 530d, BMW 525i/xi, BMW 530i/xi. (BMW 5-Series Forum)
I just bought my first bimmer project. It is a 1989 525i in mint condition besides the broken timing belt. ( ouch lol ) Well when it broke it some tabs off for on the head for the rocker arms so its junk. I was wondering if people put a head from a 3-series or something on these to make them run alot better?
Do people put dohc cam heads on these blocks?
what is a good website to check bmw head casting numbers?
e34s used the latest version of the m20. It's the highest performance from the factory for the m20.
The best thing for performance is the late model i head on an older m20 2.8 eta block. That makes for good torque.
Maybe consider getting a set of cams and stiffer valve springs if you want more performance...
Chicagos like an 8 hour drive for me. Maybe a little further than I want to drive. My two trips this year are the Street Rod Nationals in Louisville (that trip is long enough), and the Good Guys show in Kansas City (only a couple hours), I want to try to finish my street rod this year. I dunno, maybe???
Sorry for the hijack...
-There are 10 kinds of people. Those who understand binary, and those who do not.
-If we ever forget that we are One Nation Under God, then we will be a nation gone under...Ronald Reagan
a head from an e will decrease your performance. It has to be an i head.
The only e parts that enhance performance is the block. The e heads are restrictive, but the blocks are larger - so when mated with an i head, you effectively have a 2.8 liter m20 which can match output levels of a stock m50 b25
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