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  #1  
Old 09-22-2003, 12:48 PM
PhilH PhilH is offline
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BMW ///M press release - BMW WilliamsF1 engine details

Quote:
BMW engine at work !


It packs more than 900 bhp, weighs less than 90 kilograms and has a maximum engine speed of 19,200 rpm. The BMW P83 engine with which the BMW WilliamsF1 Team is pitching for the 2003 Formula One World Championship title will be put out to pasture after the final race – the Japanese Grand Prix – in three weeks’ time.

Up to now, no more than broad skeleton data on this power pack from the Munich Formula One factory have been released. Ahead of the last two races of the season in Indianapolis (28 September) and Suzuka (12 October), its profile is now fleshed out.

Who would have guessed, for example, that 1,950 CAD drawings were made for this engine? Printed out and laid end to end, they would cover a distance of 1.3 kilometres.

Facts and figures:

-Output of the BMW P83 is over 900 bhp.

-Maximum engine speed is 19,200 rpm.

-In a race, engine speed is limited to 19,000 rpm.

-Idle speed is 4,000 rpm.

-The engine weighs less than 90 kilograms.

-It completes a distance of 500 kilometres before undergoing revision.

-Total production of the BMW P83 is 200 units, ten of which the team takes to each race.

-Before being phased out the engine will have received 1,388 upgrade modifications.

-It comprises around 5,000 individual components, 1,000 of them different.

-The air intake volume is 1,995 cubic metres per hour.

-Maximum piston acceleration is 10,000g.

-Piston speed peaks at 40 metres per second and averages 25 metres per second.

-Exhaust temperatures of up to 950 degrees are reached.

-Maximum air temperature in the pneumatic system is 250 degrees.

-The ultra-high-speed 130R turn at Suzuka with its lateral load of 4g poses the greatest challenge to the oil system.

-The BMW P83 endured the highest full-throttle proportion on the Monza circuit at 73 per cent per lap.

-At the Monaco Grand Prix, the transmission and engine have to withstand an average 3,100 gear changes.

-The engine block and cylinder head are made of cast aluminium and are manufactured at the BMW Formula One foundry in Landshut using a special thin-wall casting method.

-BMW Munich handles, among other things the manufacture of the crankshaft (steel), camshaft (case-hardened steel) and camshaft covers, as well as processing of the cylinder head and crankcase. The oil system and engine electronics also stem from BMW Munich.


BMW 83 engine timeline from concept to culmination:

-Concept: November and December 2001

-Design: January through May 2002

-Model construction at the BMW foundry in Landshut: March through May 2002

-Components manufacture: April through July 2002

-Initial assembly: July 2002

-First bench test: 31 July 2002

-Test phase development stage 1: August 2002 through January 2003

-First deployment in car: 18 September 2002

-Development to race readiness: October 2002 to mid-February 2003

-Further development: mid-February to season’s final in October 2003

In the meantime the test phase for the BMW P84 engine was launched. Following successful bench tests, it was already being tested on the track in its 2004 season specification at Monza on 4 September 2003.


Press release
BMW Motorsport
http://f1.racing-live.com/en/headlin...22150523.shtml

Since I've already heard the commonly quoted 19,000 RPM redline and 900 horsepower, the stats that jump out at me here are the 3,100 gear changes at Monaco (I wonder if that's the whole weekend ) and the 4,000 RPM idle speed.
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Last edited by PhilH; 09-22-2003 at 01:07 PM.
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  #2  
Old 09-22-2003, 06:24 PM
richard richard is offline
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Pretty facinating stuff. I do believe that amount of gear changes is just for a race distance at Monaco. Just think, they used to do it with an H pattern gearbox and heel and toeing.
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Old 09-23-2003, 10:59 AM
Andre Yew Andre Yew is offline
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Monaco's about 78 laps, which works out to about 40 gear shifts per lap for 3100 gear shifts. If you have to downshift and upshift once per corner, that's about 20 corners, which seems conservatively low for such a twisty course. Add in the upshifts on the straights, and the multiple downshifts for some corners, 3100 seems to be in the right ballpark.

The most remarkable story I've heard about Monaco's shifting requirements was how John Frankenheimer got the shifting sounds for the Monaco sequence of "Grand Prix". His sound equipment wasn't working when they were shooting at Monaco, so he hired an American F1 driver to drive his F1 car up and down a drag strip in Riverside, simulating all the shifts (and hence throttle and brake inputs as well) for Monaco (I guess F1 was much more accessible in the 60s). This had to be performed in real-time, and had to match what was filmed, and he basically matched it. In driving schools they always talk about top drivers who can drive the racetrack in their heads, and match their real track times with great precision, and, for me, this story is one of the best examples of that remarkable skill.

--Andre
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Old 09-24-2003, 11:34 AM
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Pinecone Pinecone is offline
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Quote:
Originally Posted by Andre Yew
Monaco's about 78 laps, which works out to about 40 gear shifts per lap for 3100 gear shifts. If you have to downshift and upshift once per corner, that's about 20 corners, which seems conservatively low for such a twisty course. Add in the upshifts on the straights, and the multiple downshifts for some corners, 3100 seems to be in the right ballpark.
--Andre
Not al corners require and up and or down shift. Lots of series of corners are taken in a single gear.

You can check out the Monaco track map at www.formula1.com It looks like 12 corners to me.
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Old 10-19-2003, 07:33 PM
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SteveT SteveT is offline
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Here's additional excellent pictures to go along with the earlier writeup. The below is one of the best pictures that I've seen of the BMW engine. The link is pretty much the same details posted earlier and a few additional pictures. Worth a look though.

ScarbsF1 BMW engine pix
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Old 05-02-2006, 04:32 PM
Coldduk Coldduk is offline
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Will it fit in my 528?? Hee Hee. What does "SMG" stand for and when do I use my DSC traction thingy, it slows the car right? Thanks!
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Old 05-04-2006, 12:33 PM
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berford berford is offline
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Quote:
Originally Posted by Coldduk
Will it fit in my 528?? Hee Hee. What does "SMG" stand for and when do I use my DSC traction thingy, it slows the car right? Thanks!
Do you really not know?
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