Which bottom end is better? B34 or B35? I have a B35 right now, so if there is a combo i could use to make good power, I would like to know, as I know that the B35 head is the "desirable" high flow version.
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Both bottom ands are about even in terms of quality, both have forged cranks and super strong rods, both have incredibly tough iron blocks. The B35 bottom end with a B35 head will make 10:1 compression, but a B34 bottom end will make less than the stock 8:1 compression due to the B35 head's larger combustion chambers. If you have a B35, you are already doing way better than you would be with a B34. A chip, headers, and cam will make a very nice difference though!'88 528e /// '88 M5 /// '89 951 /// '98 E430 /// '02 M5 -
b35's are 9:1 ? Unless you 'states guys got a different spec to us euro's ?
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I'll be damned, they do have 9:1 compression according to the internetz.
So my M90B35 has 9.3:1 compression, and my soon to be M30B34 Euro will have 10:1 according to the BMW 6 Series Enthusiast's Companion. Funny thing though, it says that the US spec M30B34s ran 8.8:1 compression instead of the 8:1 like everyone else says. Typo?'88 528e /// '88 M5 /// '89 951 /// '98 E430 /// '02 M5Comment
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