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Car Forum / BMW Cars / April 2004true horsepower of the e34
I recently came across a website that says the horsepower for the 525 was actually reduced from 192 to about 180 then written as 170 by BMW when they introduced the 523, in order keep it apart from the 528.This was for the 24 valve engine. is this true? If so, did they do similar games with the 12 valve m20 engine? finally, in addition to the 24 valves of the m50, what other differences were from the m20, can one put an m50 engine into an e34 that initially had m20 (without modifiying the hell out of the car :) ) ? Imad > I recently came across a website that says the horsepower for the 525 > was actually reduced from 192 to about 180 then written as 170 by BMW > when they introduced the 523, in order keep it apart from the 528. Never heard about the 180, unless it refers to running it on lower octane fuel - I believe the 192 is only valid on 98-RON (UK) fuel. The 523, although a 2.5 block, is actually detuned rather than just being a paper exercise. > If so, did they do similar games with the 12 valve m20 engine? Don't think so. > finally, in addition to the 24 > valves of the m50, what other differences were from the m20 I don't believe they're at all comparable engines, but don't quote me. > can one put > an m50 engine into an e34 that initially had m20 (without modifiying the > hell out of the car :) ) ? I'd imagine the only problem area would be the electrics - you'd have to make sure you got the full engine loom and every ancilliary to go with it!  SignatureScott Where are we going and why am I in this handbasket? "Imad Al-Ghouleh" <ighoul@po-box.mcgill.ca> wrote > I recently came across a website that says the horsepower for the 525 > was actually reduced from 192 to about 180 then written as 170 by BMW [quoted text clipped - 4 lines] > an m50 engine into an e34 that initially had m20 (without modifiying the > hell out of the car :) ) ? I'm not sure about non-US markets, but the M50B25 in my '91 is claimed to have 189HP (in US trim; often different than UK/EU due to different measurement methods, minor tuning differences.) The M50B25TU (VANOS engine in ?'94) had the same HP, but more torque. Floyd > I'm not sure about non-US markets, but the M50B25 in my '91 is > claimed to have 189HP (in US trim; often different than UK/EU due > to different measurement methods, minor tuning differences.) The > M50B25TU (VANOS engine in ?'94) had the same HP, but more > torque. I believe OP is referring to transition from E34 to E39 when 2.5l engine output was officially reduced from 190hp to 170hp, where latter one is sometimes claimed to be understated hp figure. Probably this is what OP means by 180hp? BR:Z "Zon" <john@reply-to-group.please> wrote > "fbloogyudsr" <fbloogyudsr@nwlink.com> wrote > > I'm not sure about non-US markets, but the M50B25 in my '91 is [quoted text clipped - 7 lines] > sometimes claimed to be understated hp figure. Probably this is what OP > means by 180hp? Hard to say - he's confusing. Personally, I would focus on the early E34s, since he mentioned the M20... Floyd > Hard to say - he's confusing. Personally, I would focus on the > early E34s, since he mentioned the M20... Could be ... BR:Z well that review itself was confusing enough. i think the person who wrote it meant the actual engines conversion but did not mention that it occured during the switch from e34 to e39. But I really do not know much about which engine was used when exaclty and assumed that the engine hp reduction was done before the model change. I apologiz for any confusion :) Just to clarify a bit further, the reduction in hp was from around 190 to 170, but the review mentioned that in reality the engines were detuned to about 180 only but BMW decided to write this as 170 to keep the spacing between the 523 and 528 acceptable. In Canada i dont think I have seen any 523 cars so it is difficult for me to associate a date with all this. Imad > > [quoted text clipped - 8 lines] > > >> I'm not sure about non-US markets, but the M50B25 in my '91 is >> claimed to have 189HP (in US trim; often different than UK/EU due [quoted text clipped - 6 lines] > sometimes claimed to be understated hp figure. Probably this is what OP > means by 180hp? I don't believe we ever got the 189hp E34 525i, as having that option would have further hobbled sales of the itty-bitty-V8 530i. > I don't believe we ever got the 189hp E34 525i, as having that > option would have further hobbled sales of the itty-bitty-V8 530i. No prizes for guessing where *you're* writing from, then :). The US market had the E34 525i for pretty much all of the way throughout its production run. > I recently came across a website that says the horsepower for the 525 > was actually reduced from 192 to about 180 then written as 170 by BMW > when they introduced the 523, in order keep it apart from the 528. The E34 525i motor had 192 bhp in its last year of production (1995). For the E39, the 523i was launched with a similar motor featuring different tuning. When the 528i was upgraded to 530i, BMW fitted a new motor (M54) which had the same capacity as the old 523i but a more advanced head and management system. It also put the badge "back" to 525i. > This > was for the 24 valve engine. is this true? If so, did they do similar > games with the 12 valve m20 engine? No, not to my knowledge. Although if it's confusion you're after, the M20-related 325e and 528e featured different badging in different markets (e.g. 525e for Europe, not 528e). > finally, in addition to the 24 > valves of the m50, what other differences were from the m20, can one put > an m50 engine into an e34 that initially had m20 (without modifiying the > hell out of the car :) ) ? Upgrading an M20-powered car to an M50 is fairly well documented procedure, but as with all installations involved an engine newer than the car, is more involved than just replacing the engine with the same one. > The E34 525i motor had 192 bhp in its last year of production (1995). Think it was the same for the first M50 without VANOS. The max torque was different, as was the curve. Signature*If you must choose between two evils, pick the one you've never tried before Dave Plowman dave.sound@argonet.co.uk London SW 12 RIP Acorn |
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