1991 BMW 850 V12 6 Speed
Matt Garrett - Dallas Texas
You can email me at Cadillacman@mcsmk8.com
Click here for My Cadillac Home Page
The BMW 8-Series, or E31, was produced and imported from 1991-1997 in an 850 (V12) or in later years an optional 840 (V8) version. The 840 is more common in the latter years and was a bit less money and performance, but uses the same car. As with the two engine options, the E31 was offered in an automatic, or the scarce 6 speed, making the V12 6 speed about as rare of car as you can find. The E31 is truly an engineering marvel set in a timeless classic body yet to be matched by anything BMW has built since in the "looks" arena.
The E31 850 was also offered in the 850CSI version in 1994-1995, here in the US, with a total of about 200 cars ever produced. This was an improvement to an already incredible car having a few basic body enhancements over the regular 850 and a bit more power than any other 850 boasting a decent 380HP at the flywheel from roughly the same V12 with 5.6 liters. The 850CSI was only offered in the 6 speed, and the 850CSI is truly one of the most collectable BMW's you can get.
Since the 850CSI was only produced for two years in 94-95, and my particular car here is a 91, it was upgraded to most of the 850 specs within reason and integrity. The front and rear bumper pieces are obvious and are factory BMW parts. This is a simple bolt on once you find and paint the parts, but the parts are near impossible to find anymore and are extremely expensive. The suspension of this 91 has the rare (EDC) or "electronic dive control" option, giving it a sort of active suspension with two switchable setting, and is another very rare option. The springs on this car were upgraded to a lower and stiffer aftermarket spring that is a very good improvement over all factory E31s, and the front sway bar is a larger model in this car too. The rear differential was changed out to a 3:15 ratio and a Limited Slip unit. This is a BIG improvement on the 850 6 speed, giving the car a better acceleration and no effect on top speed or drivability. It is the ratio the factory should have used in the first place and is recommended to all 6 speed cars. This is also roughly the same ratio as the factory 850CSI uses. The wheels and tires are an upgrade and are later model 18x8.5 and 18x9.5 wheels with Michelin Pilot tires sharing the same sizes as the new M5 BMW. This is a true looks and handling upgrade, over the best wheels ever offered on any of these 8-Series. The original wheels/tires on all models of the E31 are defiantly a week point. This is a must for any E31 owner!
To make this car have more power without altering the originality or integrity a few basic things were done. First, all 3 computer chips were changed. The V12 cars use two "DME" computers on one "EML" computer. The DMEs each run one side of the twin 6 cylinder engine. The EML is more the throttles, and other aspects and is kind of linking the DMEs together. The DME chips are the popular Conforti chips, giving the car about 30HP over its 300HP rating. The EML, removed the top speed limiter and raises the rev limiter. This is a separate chip from another company and is roughly the same chip used on an Alpine B12. The combo of the 3 allow the car to achieve a near 180MPH speed and give it a bit more acceleration. The last upgrade is the exhaust. This exhaust transforms this already "over attention" getting car, to a musical tune not played by any other car on the road. The exhaust was custom built on a chassis dyne by one of Dallas' best. Although it took extensive work and only gives the car 16 actual HP, the looks and sound are so impressive that you just want to listen to it all day. If you did not see the car, you will look when you hear is as there is no other sound like it. If you own an E31, I highly recommend a system like this as it literally makes the car! With all of the performance mods, this particular 850 has 286HP to the wheels. That is roughly about 345 HP at the flywheel, still 35HP short of the real 850CSI, but it is as close as you can get without altering the engine, and that is not an option on this particular car in its condition and rarity.
The down side to all E31's are that they are a very heavy machine, weighing right about 4000LBS. This is good for drivability and stability, as the car is simply one of the best driving cars ever built, but even with the performance enhancements, the car does not quite live up to its absolutely near perfection of looks in the performance arena. They really need to be about a 500HP car to be the best car in the world, but for stock it does ok, offering very adequate acceleration, great top end reliability and endurance, and is simply fun to drive. If you want an incredible car that is built extremely well, is very rare and collectable and offers the ultimate "hey look at me" factor.. The BMW 850 gives that like no other car.
Click here for My Cadillac Home Page
Click here for My Cadillac Home Page
You can email me at Cadillacman@mcsmk8.com