OH MAN that is one pristine work on E30. I admit my preference to OEM stock stuff, but how about stuffing M52B28 and that's it - problem solved :) ETA engines were like a diesel alternatives back in the day though.
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Yeah I get that, the point here was really to have a quasi new M20 high performance solution that’s reliable. I have he M52 in my E46 it is a magnificent engine in its core but the M20 is in so many ways more fitting and also more reliable and has unique characteristics...an E30 needs an M20/30. Glad you like it!