E30 Harness on E24

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Cmkinney
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E30 Harness on E24

Post by Cmkinney »

I'm considering purchasing a 1982 euro with m90 and dogleg.
Owner says he swapped the original harness for an e30 harness and ECU.
His plan was to eventually run ITBs and a megasquirt.

Is this E30 harness swap compatible? Anyone else seen it done? Any issues I should be concerned with?
Thanks!
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Ralph in Socal
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Re: E30 Harness on E24

Post by Ralph in Socal »

That’s an engine management system for an M20 motor of smaller displacement. Why and how?

Ralph
There is a very fine line between "Hobby" and Mental Illness.

85 635csi Zinno Auto
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bakemono
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Re: E30 Harness on E24

Post by bakemono »

Could it be an e30 Motronic 1.1/1.3 harness combined with an M30B35 ecu from an e34? It's been a while but I recall that it was possible to mix and match some of these things.

Does the car come with the original harness? Or a Megasquirt ecu for that matter, depending on whether you want to go ahead with that plan? Leaving it as-is with a frankenstein setup might cause headaches.
'82 528e - M50B25 + GS6-37BZ
'83 633CSi - Megasquirt and a 3.46LSD
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Ralph in Socal
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Re: E30 Harness on E24

Post by Ralph in Socal »

Unfortunately the Motronic 1.3 upgrade is meant to generate 215 hp from an M30B34. This would be a lateral move for an M90 as that’s already producing more hp than that. Trying to extract more HP?

Sorry but I prefer the R&D and engineering capabilities of BMW

The M90 is an excellent setup from the factory. Messing with the engine controls of a budding classic car seems absurd

Ralph
There is a very fine line between "Hobby" and Mental Illness.

85 635csi Zinno Auto
84 528i Euro
83 635 Euro Arktik
81 528i Kastanien 5-speed
88 528e Bronzit (Granpa Car)
86 535i Auto (For Sale)
81 633 csi (retired)
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