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12 Jan 2011
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Join Date: Oct 2002
Location: Stockholm - Sweden
Posts: 317
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Quote:
Originally Posted by AliBaba
15A is 180W, there is no way you can turn an engine with 180W. 180W equals 0.25HP... It would have been possible to run the starter from your 15 Ah battery for one hour!
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Quote:
Originally Posted by AliBaba
The Valeo is 700W (close to 60A) but that's when it's spinning, at start-up it's far more. A heavy start can easily be 5 times the rating.
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I refer to official data.
Found this on the net - might be of some interest:
http://jhau.maliwi.de/mot/r-elec.html
http://www.euromotoelectrics.com/category_s/29.htm
http://www.euromotoelectrics.com/SearchResults.asp?Cat=3
http://bmwmotorcycletech.info/startingprobs.htm
http://www.mekafrance.se/valeo-m-13.html
http://bmwmotorcycletech.info/boschvaleostarter.htm
Start & Generator Specialisten: Startmotor / Startmotorer / Startmotorer;BLSHOP-1294675140837=13dq3ge1u0pgq
What I can see is a confusion here between torque (in kW) and electricity demand/consumption/current in A. The Bosch starter excerts 0.5kW in torque, and the Valeo excerts 1.2kW in torque. Bosch uses brute electric force (320A) to achive this, whilst Valeo uses revolutions (15A) to achive it.
It does not matter who is right and wrong here, what matters is that Shadowraven can make an informed and well based choice between these two options, Bosch and Valeo.
There are positive and negative sides of both startermotors. Lets focus on the important differences - what affects reliability on the road.
My experience is that Valeo is as good as Bosch - I know my experience differs with many on this point. The missing grease in the planetary gears may be a (or the) reason why so many Valeos fails; but how does this missing of grease cause the magnets to get unstuck and jam the startermotor??? Is heat the cause?
It is kind of peculiar, since I have used Valeo since 1992 (150-200 000 miles, salt, sleat, summer-winter) - and never had a magnet get unstuck, whilst a friend of mine got about 1000 miles and the his Valeo broke down (he -never- uses Valeos after that incident - he insists on always installing the bosch startermotors ever since) !...
All I ever have had to "repair" is to replace the brushes twice. Why do my Valoes not brake down when others does?... Could the missing lubrication of the planetary gearing be the cause/reason?...
At -25'C and below... the Bosch starter motor will not turn. The Valeo does and quite easily starts the engine. The lowest temp that I have personal experience of, with mineral oil (15W/40), is about -28'C.
So, as for me, the Bosch-startermotor is not an option, but that is merely due to the climate in which I drive.
__________________
Drive Safely,
Albert
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