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The BMW Range
5 Series
E34
some questions on e34 engine
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<blockquote data-quote="525iBoy" data-source="post: 72068" data-attributes="member: 1183"><p>Hi Thomask</p><p></p><p>you are in good hands with Ah Wai. I may two friend all use him and feel his prices are OK, quality of work good, turnaround fast and best of all he can repair e34's blindfolder. 24v .20 is a more complex engine at 12v so diagnosis a bit more difficult but Wai should be OK </p><p></p><p>Your 300O rpm at 100kms. Wolverine is right. it shoudl be 110kms at 3000 rpm. I know bec I recalibrated my speedometer. at now ifeel its acc _+3%. if you feel it should be higher then your speedo may be inaccurate. btw 3K rpm at 100km is quite average. No use comparing our cars to the perdana. It's a totally different beast!!. ie. better!!!. the Perdana & most jap engine is geared more for high rpms and with a very different power delivery curve and gearing compared to UDMs. (they usually use a different stroke/bore ratio giving higher rpms but lower torque)</p><p></p><p>Your m50 UDM with torque curve peaking around 4500+ rpm are geared for optimum power deliver at the 160+kmph range where most people from the "Fatherland!!" drive. Perdanas & most Jap 2 ltr designs are often geared lower in 5th for better fuel economy but geared too low for optimal power delivery at highter speeds. ie. when car feels non reponsive at higher speeds bec. it is not in the "power band" . This is bec speeds are lower - much lower in Japan so the cars are designed more for those conditon.</p><p></p><p>large drone from rear. Its 99% a wheel bearing or a tire. If it gets louder and louder and really drones. I would say that 90% it's a wheel bearing. best replace both at the same time, aswhen on fails the other fails in a few months. cheap to replace if the bearing so don't worry.</p><p></p><p>if car is jerky, it is either ignition or fuell . usually ignition. check your plugs (correct ones? good condition? gapped correctly) and coils (I thik you car has 6!!) if coils fail!! ouch 250 -300 each!! - this is why I drive a 12 v! if not these then it you AFM or worse of all DME board. not to worry those these v. rarely fail.</p><p></p><p>enjoy...</p></blockquote><p></p>
[QUOTE="525iBoy, post: 72068, member: 1183"] Hi Thomask you are in good hands with Ah Wai. I may two friend all use him and feel his prices are OK, quality of work good, turnaround fast and best of all he can repair e34's blindfolder. 24v .20 is a more complex engine at 12v so diagnosis a bit more difficult but Wai should be OK Your 300O rpm at 100kms. Wolverine is right. it shoudl be 110kms at 3000 rpm. I know bec I recalibrated my speedometer. at now ifeel its acc _+3%. if you feel it should be higher then your speedo may be inaccurate. btw 3K rpm at 100km is quite average. No use comparing our cars to the perdana. It's a totally different beast!!. ie. better!!!. the Perdana & most jap engine is geared more for high rpms and with a very different power delivery curve and gearing compared to UDMs. (they usually use a different stroke/bore ratio giving higher rpms but lower torque) Your m50 UDM with torque curve peaking around 4500+ rpm are geared for optimum power deliver at the 160+kmph range where most people from the "Fatherland!!" drive. Perdanas & most Jap 2 ltr designs are often geared lower in 5th for better fuel economy but geared too low for optimal power delivery at highter speeds. ie. when car feels non reponsive at higher speeds bec. it is not in the "power band" . This is bec speeds are lower - much lower in Japan so the cars are designed more for those conditon. large drone from rear. Its 99% a wheel bearing or a tire. If it gets louder and louder and really drones. I would say that 90% it's a wheel bearing. best replace both at the same time, aswhen on fails the other fails in a few months. cheap to replace if the bearing so don't worry. if car is jerky, it is either ignition or fuell . usually ignition. check your plugs (correct ones? good condition? gapped correctly) and coils (I thik you car has 6!!) if coils fail!! ouch 250 -300 each!! - this is why I drive a 12 v! if not these then it you AFM or worse of all DME board. not to worry those these v. rarely fail. enjoy... [/QUOTE]
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