hobbsy
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| posted on 24/3/14 at 05:06 PM |
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Heated windscreen on a BEC (with bike batt) a bad idea?
I don't have any Haynes manual to hand to check the figures but my gut feeling is that a 25A heated windscreen would be a bad idea on a BEC
(2003 5PW R1) with a bike battery?
I've already had a couple of stator failures.
Would you get away with running it without headlights or cooling fan on I wonder?
Anyone else running a heated windscreen on a BEC?
It's my Fury so an S3 Elan screen. Existing one is cracked so needs replacing anyway.
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ReMan
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| posted on 24/3/14 at 06:10 PM |
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My gut feeling is also that there not 25A spare in a BEC alternator. And the time you need to heat the windscreen you probably also need the lights on
www.plusnine.co.uk
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rdodger
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| posted on 24/3/14 at 06:18 PM |
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Great demand for screen heating in Barbados Dave? 
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hobbsy
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| posted on 24/3/14 at 06:24 PM |
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It was a bit nippy a few weeks ago, dropped below 25 deg C late night / early morning for the first time in ages!
However the car is in the UK not out here 
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adithorp
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| posted on 24/3/14 at 06:45 PM |
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Just copied this from the 5pw service manual...
Charging system
System type AC magneto ----
Model (manufacturer) F4T471 (MITSUBISHI) ----
Normal output 14 V/32 A at 5,000 r/min ----
Stator coil resistance/color 0.19 ~ 0.23 Ω at 20 °C (68 °F)/W–W ----
Rectifier/regulator
Regulator type Semi conductor short circuit ----
Model (manufacturer) FH001 (SHINDENGEN) ----
No-load regulated voltage 14.1 ~ 14.9 V ----
Rectifier capacity 35 A ----
Withstand voltage 200 V ----
I'd say with an output of 32A and with the known stator problems, you'd be pushing it drawing 25A just for the screen. Not done the maths
but I guess you'd be drawing close to the max even without fan and lights on.
"A witty saying proves nothing" Voltaire
http://jpsc.org.uk/forum/
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snapper
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| posted on 24/3/14 at 06:45 PM |
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To be honest you only need a heated screen to defrost in the morning
De misting is a different problem and needs vents
If you ran a heated screen you could link a battery booster at home or run a heater matrix and blowers
Does seem to be strange idea though
I eat to survive
I drink to forget
I breath to pi55 my ex wife off (and now my ex partner)
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hobbsy
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| posted on 24/3/14 at 06:53 PM |
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Adi,
Yeah thought so.
Daft thing is that currently a heated screen is cheaper than a normal one as unless I want to wait 2 months+ for the next batch to arrive the normal
screens are made to order.
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twybrow
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| posted on 24/3/14 at 11:40 PM |
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quote:
Originally posted by hobbsy
Adi,
Yeah thought so.
Daft thing is that currently a heated screen is cheaper than a normal one as unless I want to wait 2 months+ for the next batch to arrive the normal
screens are made to order.
So just buy one of the heated ones - and then decide whether to plug it in!
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hobbsy
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| posted on 24/3/14 at 11:45 PM |
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Yeah that is the temptation. If I ever sell it a future buyer could weigh it down with a car battery i suppose...
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adithorp
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| posted on 24/3/14 at 11:48 PM |
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quote:
Originally posted by twybrow
quote:
Originally posted by hobbsy
Adi,
Yeah thought so.
Daft thing is that currently a heated screen is cheaper than a normal one as unless I want to wait 2 months+ for the next batch to arrive the normal
screens are made to order.
So just buy one of the heated ones - and then decide whether to plug it in!
Sounds like a plan to me.. Unless they do a barbed wire proof one?
"A witty saying proves nothing" Voltaire
http://jpsc.org.uk/forum/
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