I have heard of someone having his M42 from an E30 318is bored from 1.8ltrs to 2.2ltrs. According to rough calculations if you retain the stock stroke of 81mm you would need to bore the cylinder out to roughly 90mm to achieve the desired 2.2ltrs.
So what my question is, if anyone knows the answer, what is the largest cylinder bore you can achieve on the M42 block?
Also as long as we are talking about displacement in the 4 bangers the 1996 and later E36 318ti, Z3, and other 3 series 4 bangers had a displacement of 1.9ltrs. Is this increase in displacement due to a longer stroke?
If it is due to a longer stroke can the 1.9ltr crank fit into the M42 block?
And finally the 2.3ltr E30 M3 engine; the crank.... is it possible to fit that crank into the M42 block with or without any modifications?
Thus concludes the brain teaser on the quest for higher displacement for my 4 cylinder BMW engine. Anyone have any information or know of any places where I may be able to find this information?
So what my question is, if anyone knows the answer, what is the largest cylinder bore you can achieve on the M42 block?
Also as long as we are talking about displacement in the 4 bangers the 1996 and later E36 318ti, Z3, and other 3 series 4 bangers had a displacement of 1.9ltrs. Is this increase in displacement due to a longer stroke?
If it is due to a longer stroke can the 1.9ltr crank fit into the M42 block?
And finally the 2.3ltr E30 M3 engine; the crank.... is it possible to fit that crank into the M42 block with or without any modifications?
Thus concludes the brain teaser on the quest for higher displacement for my 4 cylinder BMW engine. Anyone have any information or know of any places where I may be able to find this information?
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