Last post on Feb 16, 2013 at 11:05 PM
You are in the BMW 5-Series
What is this discussion about?
BMW 5 Series, Sedan
#6687 of 12737 Dinan and AC Schnitzer M5 Upgrades
Jun 06, 2003 (1:46 am)
I read in an article that the new M5 has throttle bodies for each of the 8 cylinders and they made them larger, as well as add 30,000 in upgrades so now its an 105,000 luxury car with the speed of a rocket. I'd like to know if the 1990-93 M5 has the same upgrades available through Dinan or AC Schnitzer and would the 1991 version have those throttle bodies for each cylinder? Would it improve the car's performance if I added a supercharger or a Twin-turbocharger? Would the car run even faster if I used NOS along with a CO2 (Cold Compressed Air) Kit? Or would the chemicals add together and slow the car down? What kinds of upgrades would you place on a transmission, manual or automatic, to be able to use it for high speeds?
Can someone also tell me what is the differences between the 1991 m5 and a 5 series of the same year? Would it be possible to officially call a 5 series an M5 if the original M5 engine, "brains" and trans were placed into a 5 series that originally had a 2.5L or 3.0L V6 engine and a manual transmission?
Also, I watched on World's Wildest Police Chases about a black 1990 BMW M3 coupe w/ 240 HP beat a new LT1 Camaro police car w/ upgrades and 350HP. After the camaro slid off the road after chasing the 15 year old car theif at 150 mph, 15 minutes later, the BMW broke down but I don't know the reason. Can you tell me how to modify a 1991 5 series or M5 in anyway to keep the engine keeping a sustanted maximum speed and yet not destroy itself?
#6688 of 12737 M5 and Not M5
Jun 06, 2003 (5:32 am)
joyrider147... You wrote, "Would it be possible to officially call a 5 series an M5 if the original M5 engine, "brains" and trans were placed into a 5 series that originally had a 2.5L or 3.0L V6 engine and a manual transmission?" No.
M5 is more than just the engine and transmission. And I believe BMW M vehicles have their own VIN number (forget which digit(s) theirs). Think what you are proposing might cost a small fortune. You'd likely be better off either just buying a used M5 or aftermarket modifying the non-M5 car (Dinan chip, low restriction exhaust, better tires, lighter wheels, upgrade brakes, etc.).
Jun 06, 2003 (5:43 am)
Sorry that I cannot answer your technical questions as far as modifications. Generally speaking the M cars have engine mods, suspension mods and some interior mods with a different wheel package. All M cars are manual transmissions. As far as the difference between a 91 M5 and a regular 5er (probably 535i), I would have to check the BMW brochure for that particular year (I might not have that brochure since those were college years or it might be Euro specs). If I went for the mods, you might want to find out if any of the German tuners have done turbochargers or superchargers for a 90's model 5er. Maybe a cam swap might also help.
As far as aftermarket mods, most of the German tuners/manufactures tend to get more out of the engine that BMW Motorsports but at a price. The M cars tend to be a bargain when compared to what AC Schnitzer, Hamann, Alpina, Racing Dynamics, and Hartge will cost. On the flip side, I have scene a side by side comparison on TV of a E46 M3 with the Alpina and I believe, Hamann counterparts. The M3 did lag. None the less the M cars are excellent and I would love to own one.
Jun 06, 2003 (1:03 pm)
Gents (and ladies):
I have heard that the engine on a 530 is below the quality of the 525, and despite the less power, the 525 is the choice between the two. Do you agree, disagree? Also please don't shred me...I am a bit of a novice here, and wan't to verify what I have heard before I purchase. Thanks.
#6691 of 12737 BMW's in Germany
Jun 06, 2003 (1:06 pm)
I am in Germany at the moment for a family reunion. One sees plenty of BMW's around. One interesting fact is that a high percentage do not have the number designation at the back. A cab driver told me that in Germany you have the option of ordering the car without it, might keep the thieves guessing as well as the police if you have a hot one--of course the fact that you have no number might make people think it is better. It might make more sense to have a fake number. There also seem to be some models we don't have.
#6692 of 12737 da_schwartz
Jun 06, 2003 (1:16 pm)
I have heard that the engine on a 530 is below the quality of the 525, and despite the less power, the 525 is the choice between the two.
Ummm, I am not quite sure what you mean by "below the quality", however, I think one would be hard pressed to prove that the 2.5 liter mill has fewer problems or lasts longer than the 3.0 liter engine. Why? Simple, the two engines are virtually identical, with the only significant difference being the crank shaft (longer throws) and the connecting rods (shorter length), which is what gives the 3 liter engine the extra .5 liter of displacement.
Regarding the power, the 530i has considerably greater low end torque, and makes for a much more pleasing driving experience when compared to the 525i.
#6693 of 12737 There is Absolutely. . .
Jun 06, 2003 (1:46 pm)
no doubt that the majority of the BMW's driven in Germany don't have any badging whatsoever. Whether the engine is a 1.5 or a 3.0 is a mystery to all but those who know/care.
When I asked a business associate about this, his reply was something to the effect of "those who care know -- who cares about the others?"
Not bad words to live by.
There are those who drive BMW's who would beg to differ. It'll be fun to hear from them.
Jun 06, 2003 (2:20 pm)
Debadging does have its advantages in Europe. I wish that I had the option number for de-badging at the time. You also tend to find fewer 2.5 and 3.0 litre engines on the 3er and 5er. Most of the time, I was 320s and 520s. Even the DTM cars are 320s
#6695 of 12737 da_schwartz: There are NO QUALITY ISSUES
Jun 06, 2003 (5:46 pm)
with either BMW I6 engine. As Shipo states, these two power plants are identical in design and the only difference is in displacement resulting in different power output. All five of the BMWs my family currently own are I6 powered and none of us have ever experienced an engine related problem. I personally own a 2003 530i and think it is one of the best cars on the road today. BTW, Wards Auto World named the BMW 3.0L engine one of the top 10 engines for 2003.
Hope this helps....
#6696 of 12737 540i Recirculating Ball Steering Gone from new E60
Jun 06, 2003 (7:58 pm)
For those in love with rack-and-pinion steering, you'll love these words from the July 2003 issue of Automobile: "The 540i's recirculating-ball steering is history." They rave about the new "active rack-and-pinion steering system". AFS is part of optional Sport Pkg. All the others come with rack-and-pinion steering, too. They appear to love the driving experience of the new 5 Series. As they put it, it "drives brillantly."
Following words made my spirits soar: "Overall weight is down by as much as 165 pounds, so the 530i weighs about 3500 pounds."
Too bad the Sport Pkg uses run-flat tires!