36$ Blower motor replacement

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02-24-2023, 07:22 PM

#16

Rob Edwards

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I got the 24 amps reading on the 0 130 111 145 motor, mentioned in a couple of blower motor threads. Currently (ha ha) running around in Eman's Turquoise '91.

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02-25-2023, 07:34 PM

#17

Hey_Allen

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What years does this fit so far?

The other motor retrofitting threads were mostly for the later cars, but if like to find an affordable source for an earlier car application.

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02-25-2023, 09:07 PM

#18

Gary Knox

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ICS,

Do you know what the RPM of the replacement Boxi motor with fan installed was at the max current of ~14 amps? How did it compare with the RPM of the OE Bosche motor at ~24 amps that you replaced? I suspect that speed may be important if maximum airflow is desired. If RPM and airflow are the same, sounds like a great find for replacement.

Gary

Last edited by Gary Knox; 02-25-2023 at 10:22 PM.

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02-26-2023, 12:51 PM

#19

icsamerica

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Quote:

Originally Posted by Gary Knox

I didn't test the RPM. I have no tools to do that... at the moment If I ever do another I would test the RPM. I do have a vibration analyzer and I just want to re-iterate the better fan balance really diminished the rumble from the blower fan when on high.

Empirically speaking air volume seems improved. I no long have MBS on low and when on high I get a nice wind in my face.

Last edited by icsamerica; 02-26-2023 at 12:52 PM.

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02-26-2023, 07:19 PM

#20

Alan

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Quote:

Originally Posted by icsamerica

Which Roger motor? My understanding is there were 2 versions sold over the years. Thanks for posting this. At 13.4 amps you're getting almost the same draw I got at 13.75. I presume from the video your engine was running so your voltage was higher so less amps should be required to do the same amount of work than when I did my test at 12.25 Volts with the engine not running. Whatever motor you have I presume it's a similar armature and brush design because it has nearly the same draw.

The amount of amps depends only on the voltage. More volts = more amps. The amount of work done is not the constant here - in fact everything is a variable - even the supply voltage will vary depending on what else is on. The most interesting thing here is the voltage drop you see when operating - we can't believe that the system voltage (in this case battery voltage) will stay at 12.25 volts with the blower running - however the voltage readings you show at the motor suggests to me that over 2 volts is dropped in the blower supply wiring/connectors (a huge %) - that also suggest over 25W lost directly into the wiring - quite a concern. The motor would be more effective if this loss was (mostly) eliminated and the wiring/connectors would be at less risk.

Alan