RacerX Posted September 4, 2006 Share Posted September 4, 2006 I found this webpage regarding BMW engine specs. I noticed with the horsepower/torque info provided that it also posted - what I believe to be the engine weight both in "Kg" and "lbs". If this is so - these engines are very lightweight or am I not understanding something here. Look at the weight of the M70 12 cylinder engine: M70 V12 SOHC 24V. 1988-1994. 155kg 341lbs Used in E32 750il, 850i 5.0 (300bhp) Chelle - is this correct since you have one of these engines in your car? Brethren - What is your observation please? Thanks for your input. RacerX http://www.bimmerforums.com/engine_faq/ Quote Link to comment Share on other sites More sharing options...
cribbj Posted September 6, 2006 Share Posted September 6, 2006 I don't know where that fellow got his figures, but in an "official" BMW TIS document (entitled SBT 5.0l V12 Engine M-70) it states "the new V12 maintains a power-to-weight ratio of 1.77 lbs/hp" while giving its output figure as 295 HP. This works out to 522 lbs, which agrees well with other figures I've seen for this motor. John Quote Link to comment Share on other sites More sharing options...
Administrators RTz Posted September 6, 2006 Administrators Share Posted September 6, 2006 If this is so - these engines are very lightweight or am I not understanding something here. Look at the weight of the M70 12 cylinder engine: M70 V12 SOHC 24V. 1988-1994. 155kg 341lbs Used in E32 750il' date=' 850i 5.0 (300bhp) [/quote'] Hi, The info I have agrees with the 341lbs BUT... thats bare longblock only... no manifolds, starter, etc, etc. John's 522lbs would give it about 180 lbs of 'stuff'... probably not far off on a V12. Quote Link to comment Share on other sites More sharing options...
racerx7 Posted September 12, 2006 Share Posted September 12, 2006 Hi' date='The info I have agrees with the 341lbs BUT... thats bare longblock only... no manifolds, starter, etc, etc. [/quote'] I agree. That must be just for the longblock. Quote Link to comment Share on other sites More sharing options...
racerx7 Posted September 12, 2006 Share Posted September 12, 2006 Welcome racerx7' date=' Thanks for your input. For some reason your handle prompts me to think it has to do with Mazda RX7?! I use to be the RX7 club rep for the SF bay area in the early 1980's. Again - welcome to the forum!!! RacerX[/quote'] Thanks. I am just a few miles south of you in belmont. I am a rotary nut. I have a rx2 and a fd3s. If the wife ever lets me get another car I want a 240z. Mine is the fast one. Quote Link to comment Share on other sites More sharing options...
Mikelly Posted September 13, 2006 Share Posted September 13, 2006 And apparently the S50 S52 and S54 varient L6 BMW motors all weigh the same... But I can't find the exact weight at the moment... Before I'd go through the pain and agony of owning and feeding a V12, I'd go for the S54 with more SAE HP! Mike Quote Link to comment Share on other sites More sharing options...
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