V12 E36 - BMW Forum

niccin · 10-08-2004, 03:42 AM

Hi everyone,

I was wondering if anyone could offer me any information on a project I am starting. I have an 88 750il and am going to put the engine into an E36. Also while doing this I want to change the transmission to manual. My main concern is finding out what transmissions will bolt up to or can easily be adapted to the v12 engine. Any info on any aspect of the swap would be much appreciated, especially info on anyone who has done this conversion before.

Thanks

Niccin

007ben · 10-08-2004, 08:56 AM

Thats nuts.

Things would be tight if they fit at all.

Autotechnica · 10-08-2004, 09:41 AM

It does fit. Racing Dynamics had a project car called the K30.5 Hurricane. I can't remember the exact name since it was from years and years ago. However, they had problems driving the car on the street. It was too powerful for it's own good. However, I believe that model had a twin turbocharger. Anyways, are you sure you want all that weight up front? It would seriously upset the car's weight balance and handling. Not to mention that the 5.0L V12 motor is BMW's most unreliable motor.

007ben · 10-08-2004, 10:40 AM

The older V12s my understanding the newer ones where much better.

wulley1 · 10-08-2004, 12:10 PM

Probably not the most practical project to take on....But it would be sick!

Weight balance would be all messed up though, but great for burnouts.

niccin · 10-09-2004, 04:52 AM

Quote:

Originally posted by Autotechnica@Oct 9 2004, 12:41 AM
It does fit. Racing Dynamics had a project car called the K30.5 Hurricane. I can't remember the exact name since it was from years and years ago. However, they had problems driving the car on the street. It was too powerful for it's own good. However, I believe that model had a twin turbocharger. Anyways, are you sure you want all that weight up front? It would seriously upset the car's weight balance and handling. Not to mention that the 5.0L V12 motor is BMW's most unreliable motor.

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Thanks for your input, I'm looking for infor on the k30.5 now. I know there will be a little bit of a problem about weight distribution, I'm talking to some engineers here about how it will turn out. But i'm a sucker for v12's. I plan to get rid of the electronic throttle and unessesary crap on the engine, and runeither motec or haltech ems, and have considered turbo charging the engine, I have one turbo for it already, just in case i decide to.
I have a couple of other cars that have good handeling, the e36 is more for something different.

Thanks again for you help guys

Cruzin 323is · 10-09-2004, 10:32 AM

autotechnica has a good point, thats a lot of weight... thats a HUGE project to take on... and prolly a lot of money!!

thinair · 10-09-2004, 12:03 PM

The M70B50 engine (750i/850i) is 155kg. The M50B25 (325i/525i) is 136kg. The weight difference isn't that bad, like 45lbs. Buy a carbon fibre hood and you're at the same weight.

Yes, Racing Dynamics has done it, in a e36 compact chassis. But it's useless, you do get the torque, but the cost of the install is just stupid. You need a custom front subframe and mounts, intake tract, etc, etc. For what 300hp? Buy a euro M3 engine, or force induct a 325 engine for the power, for less money, and less headaches, and everything just bolts in.

By the way, the Racing Dynamics car was called the K55. They used an M73 bored to 5.5L. 427hp and 406 ft-lbs., 0-100km/h in 4.5s, top speed is 306km/h.

I also don't like how the M70/M73 engine runs two ECU's. It's like having two complete 2.5L motors and connecting it at the crank. Each side of the motor is independant, two computers, two HFM, two sets of O2 sensors, two of everything. Imagine having half your engine running fine, and the other half running like crap, and now you have to fix it. Plus changing 12 spark plugs at a time doesn't sound like fun either.

By the way, I do have the Racing Dynamics front bumper for the v12 conversion :P Too bad it will never see an intake filter on each side of it.

Bear · 10-09-2004, 05:54 PM

The M70 like the M30 engine is bullet proof. The components (MAF/LAD/PS Pump) are suspect but do live as long as most other cars. I have 150,000 miles on my 1988 750 and she never fails to start, uses no oil (I use synthetic and change oil every year and filter every 5,000 miles). The M70 wqould be a tight fit and very heavy, might throw the balance off with too much front end bias.

Autotechnica · 10-09-2004, 06:11 PM

Quote:

Originally posted by Bear@Oct 9 2004, 04:54 PM
The M70 like the M30 engine is bullet proof. The components (MAF/LAD/PS Pump) are suspect but do live as long as most other cars. I have 150,000 miles on my 1988 750 and she never fails to start, uses no oil (I use synthetic and change oil every year and filter every 5,000 miles). The M70 wqould be a tight fit and very heavy, might throw the balance off with too much front end bias.

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You change your oil once a year?

Tochenzo · 10-09-2004, 06:21 PM

good luck with the project, please keep us updated on what you do

triggrhaapi · 10-09-2004, 07:25 PM

I'm due for an oil change in 2 more months

97alpineM3 · 10-09-2004, 11:18 PM

If you got the money.. and the will power to keep a project like this going... more power to ya... Good Luck.. keep us updated... pictures would be great...!!!!

Again.. good luck.. cause your gonna need it... !!!!

Les

Bear · 10-10-2004, 02:11 PM

Quote:

Originally posted by Autotechnica+Oct 9 2004, 05:11 PM--><div class='quotetop'>QUOTE(Autotechnica @ Oct 9 2004, 05:11 PM)</div><div class='quotemain'><!--QuoteBegin-Bear@Oct 9 2004, 04:54 PM
The M70 like the M30 engine is bullet proof. The components (MAF/LAD/PS Pump) are suspect but do live as long as most other cars. I have 150,000 miles on my 1988 750 and she never fails to start, uses no oil (I use synthetic and change oil every year and filter every 5,000 miles). The M70 wqould be a tight fit and very heavy, might throw the balance off with too much front end bias.

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You change your oil once a year?

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Bear · 10-10-2004, 02:14 PM

Quote:

Originally posted by Autotechnica+Oct 9 2004, 05:11 PM--><div class='quotetop'>QUOTE(Autotechnica @ Oct 9 2004, 05:11 PM)</div><div class='quotemain'><!--QuoteBegin-Bear@Oct 9 2004, 04:54 PM
The M70 like the M30 engine is bullet proof. The components (MAF/LAD/PS Pump) are suspect but do live as long as most other cars. I have 150,000 miles on my 1988 750 and she never fails to start, uses no oil (I use synthetic and change oil every year and filter every 5,000 miles). The M70 wqould be a tight fit and very heavy, might throw the balance off with too much front end bias.

[snapback]208373[/snapback]

You change your oil once a year?

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[/b][/quote]

Roger that, once a year. I use Mobil-1 and I ran my change schedule by the technical folks at MOBIL and they said No Problem. As I said, I change the filter every 5,000 miles. So far, after 50,000 miles on this schedule I have no problems and use no oil between changes.