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engine help...
Posted: Fri Jul 15, 2016 6:54 am
by Moutinho
Hi guys, i have a complete m20b20 and i aquired a m20b25 block. is it possible use the b25 block with the b20 head with the solex 4a1 carb?
I don´t know much about mechanics...
Re: engine help...
Posted: Sat Aug 20, 2016 12:42 am
by luke
I think the normal B25 pistons won't work as they're designed specifically for use with the 325i (or "885") head casting.
A 2.7 crank, pistons and rods will work in that block with the 320i head and give you a high revving eta engine.
With the carb on it, it will run out of puff at around 5500RPM, but will be an absolute rocket up till then.