grannyknot

Thinking about installing an BMW M6 engine in my Z

383 posts in this topic

I have a 1987 M6 that I have dumped thousand$ into but there is no market for them at the moment so instead of selling it for 30 cents on the dollar I was thinking about keeping the freshly restored S38 (inline six 24 valve, dohc) engine an 5spd and part the rest the car out.

I've done the measurements and it will fit nicely into a Z.

What do you guys think?

Would I be creating too much of an odd ball?

Thanks,

Chris

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ID: 2   Posted (edited)

Love it. there are a few vids and web pages of M engines in Z's. I think the engine has to tilt a bit to fit and maybe steering/cross member mods.

The L28 looks a lot like a motor from a unimog (Mercedes m180 engine) and the 280z has a German efi so German kit under the hood is OK

mb_unimog_404_M180_engine.jpg

Edited by Blue

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I love BMW inline sixes and currently own 4 different BMW's with sixes. The engine is bullet proof because it has been around for years and an M motor makes great usable power. As I typed this though I had a thought. At one time our Z's were a dime a dozen now a number of years later they are starting to appreciate in value. If you keep your car whole and wait for all the other guys to part or crash their cars, yours will appreciate. I hate to see a nice car parted unless its a rusted out hulk...the same way I hate to see a classic Z parted or crushed...

Charles

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Mark Blasko put a BMW engine & transmission into a 240Z. I don't remember what engine he put in. Track me down via the Classic Z Cars FB page & friend me, and I'll put you in touch with Mark if you would like.

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Blue, you wouldn't have those websites bookmarked would you?

Zed, what a great thread! Just read through it and he has done most of the work for me.

Patcon, believe me, parting the M6 out is the last thing I would want to do after spending 4yrs of spare time and more $ then I care to add up on it.

But, the Z is the car I go to these days. On paper the M6 is superior in almost every way to the Z, except in all the ways that can't be measured.

The Z has my heart now.

So, I have this great car that doesn't get driven.

There is no market for them at the moment unless you pretty much give them away and it's going to cost more time and money to keep it up to wait for a time in the future when tastes change.

Besides, I could help all those other M6 and 635 owners by offering up parts they may need for their cars.

It is just a car after all, so that's my reasoning and this is all still in the "thinking about it" phase.

SteveJ, FB and me don't mix so I'll google him and send him a pm through the forums, thanks for the referral.

Chris

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I don't think Mark is on this forum. He may be on Hybridz, though I don't know his screen name.

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Blue, THANK YOU, I would love to see your bookmarked/favorites list, I'll bet it is a thing to behold.

SteveJ, I found that thread a couple of days ago, pretty great.

After going through most of threads posted I see a pattern of ECU problems, or maybe not problems but challenges, some of them big. What if I could avoid it all by installing triple carbs?

It would eliminate most of the electronics, which I have to admit aren't my favorite to play with. I know I would loose some power but the Z is about a 1000 lbs lighter than an M6 so I would still be far ahead.

I would need a stand alone ignition system, the Electromotive crank P/U

and separate coils might do the job well.

Still just thinking out loud.

Thanks,

Chris

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I know that Mark maintained the Fuel Injection. I don't recall hearing if he maintained stock ignition, too.

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May have to watch any vvt system that is controlled by computer.

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Love it. there are a few vids and web pages of M engines in Z's. I think the engine has to tilt a bit to fit and maybe steering/cross member mods.

The L28 looks a lot like a motor from a unimog (Mercedes m180 engine) and the 280z has a German efi so German kit under the hood is OK

mb_unimog_404_M180_engine.jpg

Call it a ZMW. LOL

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Well, I think I'm a step closer to my 240Z///M.

I let the ad for the M6 lapse, just can't deal with one more lowballer.

The question now is do I sell my turn key Z that is finished and find another neglected Z to start over with

or pull the L28 and tranny from this car and install the M goodies?\

Chris

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Site, thanks helping me make the decision. I really do not want to do that again!

He'll never get $7000 for that wreck.

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I can't image he can $1500 for it right now 0 bids. Rust holes at the structural joint above the quarter window. I don't know that I have ever seen that! Rust bubbles on both front fenders, frame rails, the floors, in the quarter around the gas tank, under the battery, all over...I hate to see low number cars get scrapped but that car will be a lot of work if it survives

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Yer, and thats the rust you can see with the paint on it. After sandblasting it can only get worse.

 

Quote:

Parts not original to the car:
Hatch is a Series 2
Speedometer is a Series 2
Center Console may be a Series 2
End quote.
 
He forgot the 5 speed transmission.

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So you'll pull the L28 and put in the M6 motor?  What's the gain in HP?  Why not find an old 2002 BMW for the motor? 

 

If you're like me, I'm going to have to spend $10,000 adding on to my garage or get rid of a car.  At this point in my life I'll be selling a car, I'm getting old.

 

I hate to see cars sitting outside.

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Chris, Have made a discision on changing your motor or starting on another Z. If you could do the swap without cutting into the Zed, that would make it easier to reverse later if needed.

I don't know if you have the matching numbers L24? Without it the collector value will drop a lot.

Any idea what power loss you would have by changing the efi for tripples? What would be your option for the ignition?

If you could do the transplant with all that it produced somewher around 250hp. Thats a big increase over what you have now and probably better fuel economy as well.

I came across this bargin today in a saleyard close by us. He has 2 240Z's. This will give you an idea what crazy prices they ask over here.

http://www.erclassics.com/Datsun-240Z-classic-car-for-sale-1190.php

Chas

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Wow, maybe I should ship my car to the EU with prices like that. I think Blue is the one to talk to about that.

I do have the matching numbers L24 still tucked into a corner of the shop and a local guy chomping at the bit for me to sell him the mild L28 that is in the car right now.

I sure wouldn't want to start with another rust bucket, I already have my share of iron oxide in the lungs.

 

The guy who rebuilt the s38  M engine for me said he could source a intake manifold that would accept

triple carbs but he said I would be crazy to do that.

So I need to post a question on one of the bimmer forums, I would have to take the wiring harness out of the M6 and isolate just the engine management systems, distributor, timing, O2 sensor, throttle position sensor, flywheel and water temp sensor, cold start valve and all that and eliminate the rest.

I'm not sure that is even possible yet, the Motronic 1.1 system might be ancient by todays standards but it's still electronics so it's got me at a disadvantage.

 

The engine produced 256hp at 6500 and 243lb tq at 4300rpm and that was before the after market chips were available so yeah that would move a 2300lb Z along quite nicely.

The mileage I was getting on the M6 last time I checked was 9.3 L per 100km on the Hwy and that is hauling around a 3700lb car. Pretty hard to beat fuel injection.

 

This is not my engine but still an s38, with that short tranny I could move the engine back 4.5" in the engine bay and improve the weight balance of the car.

Chris

post-25243-0-75457300-1430691138_thumb.j

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I'd like first refusal on the l24 if it is an early one.  Vin147 needs a benefactor. 

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I would be inclined to make a frame and mount the S38 on it. You can set it up with the radiator and transmission to get it running with the ECU. That way you have plenty of room to work on the harness end sensors.

Once it working, you can then decide to transplant it in the Z.

I have done that on a holden gemini Isuzu when I transplanted a 1987 "Isuzu Faster" 2.0ltr with its efi into it. Gave me plenty of room to work around it. I don't think I could have done it without doing all that outside the vehicle.

Chas

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An engine test stand would make it much easier. That's a great idea

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