Caprice engine swap?

[kevm14]

5.4 LITER SOHC V12 - fail

Again, this thing performs no differently than an STS Northstar. But it's a V12 so it wins.

False.

True. STS Northstar 1/4 mile: 14.6 sec @ 97 mph. A 750iL does 14.7 sec @ 98.3 mph. It's a wash, and I'll take the extra 1.3 mph anyway.

Broken down into 2 6 cly engines, this thing is putting out 160 HP per 6 cyl. That is about half of today's standards. You could get one and do an engine swap with the 3.6 and do better! This probably has worse specs than the Gen 5 V6 Camaro. Yeah sure it is bigger, but that is why it has a V12 right? If you are looking for a big sporty performance car, this is a joke. It is way to heavy for 300HP.

HP/cylinder is not a thing. Also the M73 was aluminum block and heads. According to this link: http://www.bimmerforums.com/2009/08/engine-faq/

Also the M73 is 320 hp.

The M73 is only 330 lbs (probably dry). That is incredibly light. Light enough that I'd need to double check that. But I think I can accept that it's about as light as an aluminum LS.

Wiki curb weight:
Curb weight
1,710 kg (3,770 lb)
2,185 kg (4,817 lb) (LWB)
2,270 kg (5,000 lb) (L7

WTF!!! 5000 LBS!

Nope. Look at the Motor Trend link. http://www.motortrend.com/news/bmw-750-il/

4,553 lbs, or about the same as a 93-96 Fleetwood. Other E38s will be lighter (non L, for example). Also, the 5,000 lb model is probably the Protection package.

[Fast_Ed]

Now this is interesting (though it doesn't get to completion...)

http://bmwe32.masscom.net/sean750/engin ... uild_1.htm

The guy wanted to put a V12 into his cobra replica, naturally.

[kevm14]

Looks like the M73 got single VANOS in 1999...

http://www.everything2.com/title/VANOS

[kevm14]

Also I would bet that a 740i w/ M Sport is decent competition to an STS in handling. The STS is a smaller car.

[Fast_Ed]

http://www.e38.org/e34/

Includes looooots of info, including a buyers guides.

[kevm14]

See, as crazy as it sounds, there is a ton of support out there. Which is what the Phaeton guy told RCR.

[kevm14]

Here's more info that I can stand about the M70.

So probably just enough for you:
http://www.e38.org/e32/M70info.pdf

Pics of rotating assembly, block, descriptions..

Good lord, this says the M70 had electronic throttles. Is that possible? In 1988?

[kevm14]

The 750i was supplied with an M73 engine from start of production in December 1994 until the end of August 1998. This was a 326 bhp engine producing 490Nm or torque at 3900rpm.

In September 1998, the 750i was given a technically updated engine called the M73 TU (technical update). The cause for this update was to ensure that vehicles produced after this date fell within the emissions guidelines that the government set at that time. The update was not mechanical, but the ECU's and hardware were altered to give a lower emission value.

The M73 LEV engine is the American version of the M73 TU engine. LEV stands for Low Emission Vehicle, and the engine received further technical changes to fall in line with the American emissions legislations, which are more stringent than in the UK.

With the technical update, came the requirement to fit higher power spark plugs. This is mentioned in the Technical Bulletin you refer to, and states that any 750i manufactured after September 1998 should be fitted with the high power spark plugs.

Still learning. Single VANOS must have come in around this time as well.

[kevm14]

Beginning with 1999 models, 750iL models were equipped with the M73 TU engine which, though it has the same displacement as the older engine, features the following:

*Electrically heated catalytic converters (E-cat) and E-cat control module
*Dual Batteries
*Long-life spark plugs
*Compact water-cooled alternator
*Transmission fluid/coolant heat exchanger
*Rapid-action coupling in the coolant and transmission fluid circuit
*Pulley diameters and accessory belts modified to compensate for new minium idle speed (530 RPM)

Actually M73N would be more accurate because the TU suggests a "Technical Update" but there really wasnt any change to the motor itself, it was more of the auxilary components that were changed and not the innner workings of the engine.

Other sources indicate there was a slight increase in power and torque but dont know what those figures are

So no sign of single VANOS yet. Maybe that's just wrong? Electrically heated cats sounds just fabulous (not). Same with the water cooled alternator. Rockauto seems to suggest it's about twice the price. Not totally unaffordable. But I am getting the idea that a 1999 E38 adds a subtle but possibly relevant amount of terrible BMW-ness that may be worth avoiding.

[kevm14]

This guy commented on the new min idle speed on the later emissions-improved models:

Wow the bolded part is very interesting as my idle drops below 500 with the car in gear, warmed up, and the A/C off. This is the only time that I get the oil light on the dash to flash on and off as well.

I am quite positive that Ed likes this.