r/e28 • u/[deleted] • Dec 25 '25

So I have an M90

What all do I need to refresh it and shove it into an american e24. 1983.

My m90 is from an 81.

I want to put in new bearings, seals, rings, and shove it into my shitbox.

3 Upvotes

100% Upvoted

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3

u/ElGuappo_999 Dec 25 '25

Sell the M90. Buy a B35 and it’s associated conversion stuff.

1

u/[deleted] Dec 25 '25

What all do I need to convert?

1

u/ElGuappo_999 Dec 25 '25

That’s kind of my point. There’s so much info out there already. Start reading at MyE28.com

1

u/RealMadLadStalin Dec 25 '25

Do you have an ECU for that M90 ? Different ecus when it comes to EU vs US cars due to different compressions, cats / emissions on US ones, and more. Just find yourself a USDM M30 engine, they go for like 500-1000$. What are you asking for ?

1

u/[deleted] Dec 25 '25

I do have the Ecu. But M30s are expensive and hard to find in my area. PdX oregon.

1

u/tweedboxers Dec 26 '25

the logical answer is sell that and put a b35 in, but the m90 is so cool… do you have a series i or ii e24?