alternator energizing bulb wattage |
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Ali
Falcone Joined: 18 Jun 2018 Location: Staffordshire Status: Offline Points: 10 |
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Posted: 11 Mar 2019 at 15:50 |
Hi all getting to the last part of rebuilding my mk2 v50, I am having trouble with the charging, I have tested the alternator stator and rotor and all tests ok there I have also tested the diode board and all is well just the regulator now, my question is I have a 1.2 watt bulb fitted in the alternator light reading the bmw R system (which is the same as my guzzi) had a 4 watt bulb fitted as it energizes the rotor magnet and charges at a much lower rpm, I now believe that the 1.2 watt I have is to much of a resistor to energize the rotor properly, I cant find a bulb of this size to fit the dash bulb holder the biggest I can find is 2.3 watt, Am I correct in this thinking or barking up the wrong tree, thanks all re Alistair
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Brian UK
Moderator Group Joined: 13 May 2014 Location: Surrey Status: Offline Points: 17641 |
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I thought the normal size was a 2.2W bulb. Never seen anything higher fitted before. Certainly a little more current flowing will help the lower RPM start up.
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Brian.
Better 5 minutes late in this world than years early in the next. |
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Ali
Falcone Joined: 18 Jun 2018 Location: Staffordshire Status: Offline Points: 10 |
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Cheers for the info, gets a bit baffling reading things on the internet
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Mike H
Senior Member Joined: 21 May 2014 Location: East Anglia Status: Offline Points: 8733 |
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All the ones I saw (including literature) were 1.2 Watts. What kind of regulator is it? |
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"Chicken nuggets don't dance on a Tuesday."
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Brian UK
Moderator Group Joined: 13 May 2014 Location: Surrey Status: Offline Points: 17641 |
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I know 1.2W is commonly specified for the Bosch alternators on BMW and Guzzi. But all others specify minimum of 2.2W.
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Brian.
Better 5 minutes late in this world than years early in the next. |
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Ali
Falcone Joined: 18 Jun 2018 Location: Staffordshire Status: Offline Points: 10 |
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bosch system cheers
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Ken-Guzzibear
Moderator Group Joined: 13 May 2014 Location: Sileby Leics Status: Offline Points: 9454 |
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The Bosch CWL 1.2 v ..... you can pop 2.2v in the others
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The Older i Get, The Better I Was
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