I am looking at a mild rebuild to my M20 as is and was wondering how hard and how many problems I may run into doing a stroker conversion. Am I going to need to do major work to the head, new cams, computer software, throttle body.. etc. I have about a 2 month time in the summer to do this and I want to do it right, if you know what I mean, so if I was to do it "right" how much of a pain in the ass is it or how easy is it? I have an 89 325i, the 2.5 liter. Also what kind of stroker would you recomend, I have heard of Korman and Ireland Engineering but nothing else.
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M20 Stroker.. How easy can it be done?
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it's not really any harder than any engine rebuild, it just depends on how much you want to spend. forged pistons run around $800 for a set, about half that for standard pistons. either way they would need to be custom to work with the i head and e crank. of course you need an e crank, i rods and everything else you'd normally require to rebuild a motor. a cam would probably be a good idea as well as porting the head.
there are really many recipies for an M20 stroker, but the above seems to be the most straight forward.
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Originally posted by nandoit's not really any harder than any engine rebuild, it just depends on how much you want to spend. forged pistons run around $800 for a set, about half that for standard pistons. either way they would need to be custom to work with the i head and e crank. of course you need an e crank, i rods and everything else you'd normally require to rebuild a motor. a cam would probably be a good idea as well as porting the head.
there are really many recipies for an M20 stroker, but the above seems to be the most straight forward.
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