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740i pilot
12-16-2005, 02:05 AM
you take DOHC heads off a straight 6 & put them on the M70? People do this with Honda motors, & francois mentioned a guy who did it to an XJS. Just wondering...

Paparon
12-16-2005, 02:54 AM
I'm of the understanding that the cams and head on the drivers side is longer by about an inch ao I don't think it is posible.

Great Idea though If it is posible I'd like to try it when I hit the lotto...

Paparon

bcweir
12-16-2005, 03:15 AM
No need to Frankenstein such an engine. It already exists. It's called the N73.

Actually you can get a 48-valve BMW V12. It's got 6.0L of displacement and is currently offered on both the BMW 760Li and the McLaren F1. 468hp (600hp on the twin turbo McLaren).

I've never seen the engine sold separately, but imagine you could check Ebay or a late-model BMW wrecking yard.

It's out there. How much do you want to pay for one?

Personally I think that the current M70 engine used in our cars can already make any horsepower level you want. How fast you want to go is limited only by your mechanical expertise and/or how much money you want to spend doing so.

FrancoisP
12-16-2005, 03:38 AM
He is one of the master of JAg V12 engine, he is the dude who explained everything I need to know when I did my JAg ..

repect ... and enjoy the knowledge:

http://www.jagweb.com/aj6eng/index.html


Those Jag guys, they are amazing!
FrancoisPMerging a BMW e32 M70 750il and a Manual Trans BMW 730M60 European, and adding Twin-turbos.
(I keep the short body, the EDC and I put the V12 into it, Adding 2 Garetts T04B)
http://forums1.roadfly.com/preferences/showsigimage.php?img=127538

johan_735
12-16-2005, 10:56 AM
But it was never used as they thought the running characteristics weren't suited for a luxery car like the 7-series.

But how about their 1988 project "Goldfisch" which is a v16 engine producing 408 Bhp and 637Nm of torque:
http://www.cs-zone.com/OVERIG1.jpg
This engine was actually tested in the e32.

And then there is still the v16 they made for Rolls Royce with >600bhp and 920Nm of torque.
http://www.cs-zone.com/OVERIG122.jpg

Johan
1987 735i

<a href="http://bmwe32.student.utwente.nl"><img src="http://bmwe32.student.utwente.nl/images/johan_sean_e32_s.jpg"></a>

740i pilot
12-16-2005, 12:07 PM
The fun of the project would be one other reason the 760 engine would be too expensive & complicated, & the S72(?) from the F1 is probably quite rare & expensive.

A dohc M70 would be OBC1 + if you have a m70, you already have alot of the parts.

I however am just curious, I have a DOHC V8. I find engine projects quite interesting. I should have been an engineer, but I missed that train.... bad pun, I know.

bcweir
12-16-2005, 06:24 PM
5.6L V12, putting out 380hp.

740i pilot
12-16-2005, 08:57 PM

bcweir
12-16-2005, 09:29 PM

740i pilot
12-16-2005, 09:48 PM
very expensive.

bcweir
12-16-2005, 10:51 PM
The 2 valve counterparts M70 and M73 are plenty potent.

plbowler
12-16-2005, 10:56 PM
http://mydrive.roadfly.com/blog/plbowler/

91Green850
12-17-2005, 12:41 AM
There are 6 liter m70's (rebored with sleeves) running around.

740i pilot
12-17-2005, 12:59 AM
the fact that many M70 owners are totally satisfied. I like going to 11, if you will. I'm thinking that I might want to do this to an 850i. In about 2 years, my second (& last) son will be out of his bulky infant car seat & into a much smaller booster style seat. at that point, I want to get something sporty. I was intrigued by Francois' mention of the DOHC XJS, but I love BMW cars! I like projects, this is one I'm interested in. If no one else is, I understand, but if anyone has any knowledge of this type of project, I'd like to hear about it!

Siborg
12-17-2005, 01:42 AM

Siborg
12-17-2005, 01:47 AM
Oops, hit return by mistake.
Can someone tell me what the 2000 750iL V12 size in liters, SOHC or DOHC, Vanos or non vanos, and would that transmission bell-housing bolt pattern on rear of engine block match the M70 pattern?

Only 32,000 miles on it! I think I missed out on a possible deal.

Nuts.

johan_735
12-17-2005, 06:06 AM
The 2000 750i had the M73 engine which is a 5.4 v12 SOHC without Vanos.

I doubt the bolt-on pattern of the 4hp24 (M70) and the 5hp30 (M73) is the same. But you will need the 5hp30 anyway as the control modules from the DMEs, EML, ABS/ASC and the AGS (transmission) are connected thought a CAN bus. And need to communicate with each other to work properly. You might even need the e38 instrument cluster aswell as most data comes though the busses instead of regular wiring.

Johan
1987 735i

<a href="http://bmwe32.student.utwente.nl"><img src="http://bmwe32.student.utwente.nl/images/johan_sean_e32_s.jpg"></a>

johan_735
12-17-2005, 06:08 AM
Johan
1987 735i

<a href="http://bmwe32.student.utwente.nl"><img src="http://bmwe32.student.utwente.nl/images/johan_sean_e32_s.jpg"></a>

bcweir
12-17-2005, 04:48 PM

bcweir
12-17-2005, 04:51 PM
Actually the engines are very similar. What's probably needed is the BELLHOUSING for the 5HP30 transmission. The bellhousing for the 5HP30 is likely to be very different from the bellhousing for the 4HP24, but the bolt patterns on the back of the blocks are likely to be identical.

FrancoisP
12-17-2005, 07:09 PM
I want a V16 for Christmas:)

FrancoisPMerging a BMW e32 M70 750il and a Manual Trans BMW 730M60 European, and adding Twin-turbos.
(I keep the short body, the EDC and I put the V12 into it, Adding 2 Garetts T04B)
http://forums1.roadfly.com/preferences/showsigimage.php?img=127538


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