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Message: <blockquote data-quote="ALBundy" data-source="post: 46451" data-attributes="member: 15">I think this is an age old question.To me its simple. Decide what you want first, dont let your wallet hold you back. If you cant afford what you want or desire now, hold back...dont change into something that you will regret later on.Now, you can have a M20, M30 or M50 engine in your e30. Each will have their own strengths and weaknesses. Like what some have said, there are plenty of "theory" sifus in this forum, with many of them offering advice when they themselves have not done any extensive modding on their car. M20B25 isnt that bad, the transplant will probably take less than a week (have seen it done in 2 days). M20B25 engine probably cost less than 2k (about 1800), then you need wirings + ecu. If yours is a late 80s model that comes with motronic management system then just need a 325 ecu.M50B25, well we all know who has done it, seems plenty of work and also $$$ but it sure sound and look interesting. I am going this route for my up and coming E30 restoration project. I have own both the M20 and M50 engines and must say the M50 is leaps and bounds better than the M20 in terms of drivability, so much more low end torque :yahoo: As for M30B35, there are some who has done it overseas, I have not seen it so no comments from me. But then again, a M50B25 is more than enough on an E30, just imagine the power to weight ratio!RgdsAl</blockquote>