What motor can i pu in my e34 525i - Page 2 - Bimmerfest - BMW Forums

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E34 (1989 - 1995)

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Old 04-21-2013, 04:25 AM
bennyg1 bennyg1 is offline
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Location: Melbourne
Join Date: Oct 2012
Posts: 43
Mein Auto: 1993 540iA
Bank the cash youre thinking of spending, wait until something dies, then make your decision. If the real 'problem' is the M20 isnt enough grunt then sell it and buy a 535/540, you will spend less fixing one up than you will fixing up wiring issues from engine swap, or much less vs FI.
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Old 04-21-2013, 07:00 AM
MySatinDoll MySatinDoll is offline
I'm from NJ. So What!?!
Location: Near "The Situation" sadly :(
Join Date: Jan 2011
Posts: 2,147
Mein Auto: What they Drive
Probably the best swap that's damn near plug and play is a m30.
For both have almost the same setup except the ecu.

IIRC putting a m50 in a m20 or m30 car is a little more time and cost consuming for essentially your updating everything under the hood harness wise.

I maybe wrong (probably) but I think thats your best bet.

Otherwise I'd just do the maintenance on it, save that coin, and purchase a e34 with a more modern powerplant or get a 535i.

You can boost a m20. But usually you see this in the lighter more agile e30s.
Our cars are a tad too heavy and the gains wouldn't be the same as if you went with a m30, m50, on up.

GL though.

Former Content Writer - FCPEURO
86 BMW 325es...Sold,
92 BMW 535i...Totalled
89 BMW 535i aka "Zaraki"... Totalled,
90 BMW 325i m60 swap... Sold for a friend,
95 e34 525 5 spd S52 Swap aka "Grau"...Sold,
01 Cosmoschwartz on Dove e38 740i msport... Sold,
01 Titan Silver on Schwartz e38 740i Msport Aka "Lucky Lilly... Daily
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Old 05-30-2013, 10:34 PM
3star 3star is offline
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Location: texas
Join Date: Mar 2013
Posts: 679
Mein Auto: 89 E30 Cabrio
People keep talking about wiring issues what wiring issues its just an engine swap not assembling a Saturn v rocket.

How hard can it possibly be all engines are essentially the same they need spark air and fuel to work. Each of those systems needs a sensor to provide the ecu with input.

All an ecu needs to work is a constant voltage signal, through a relay. For engines with ews issues get a ews delete chip.

Swaps are not that difficult to do god. It just takes time and patience. But the end results are always worth it. True selling your car and buying a faster one is the cheaper easier option but what knowledge do you gain from doing that. Any idiot can buy a fast car. You learn alot from building a car knowledge that can help u when ur stranded or save u money in the long run. I say choose an engine u can afford get it with ECUs and airflow meter and other sensors and do the swap. You will have a ton of fun and learn alot of valuable skills. If you plan it right you can do th e entire thing in a couple weekends or in a week or so if u work at it.

I used to swap motors in a day back when. Was working on tuners
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Old 05-30-2013, 10:43 PM
3star 3star is offline
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Location: texas
Join Date: Mar 2013
Posts: 679
Mein Auto: 89 E30 Cabrio
Finally when choosing a motor look for one with the power u want. Look at the after market look for common problems and research the price of common wear and tear parts. Look into the gearbox and diff make sure your current units can take it. Once you've considered all this do it even if u fail you can sell the motor for what you paid and part out your car on the web for double what anyone would give you for it.

Or you can reverse what you did and go back to stock. Bittomline is you would have stil tried and learned alot. Knowledge is way more valuable than speed, and hands on is the best way to learn anything new.

Hell we have a guy that put a v12 in his e34. That alone should show that anything is possible if you try. I'm sure he doesn't regret ignoring the nay sayers

Last edited by 3star; 05-30-2013 at 10:45 PM.
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