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Registered
Join Date: Oct 2001
Location: Round Rock (Austin), TX, USA
Posts: 1,212
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voltage output?
My radar detector is also a voltmeter. The S reads 14.7~15.3 volts and moves throughout the range actively. My cage runs 14.6 dead steady.
Is 15.3 V high? Is the high variability a problem or indiciative of one?
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Paul. '11 R1200RT, '09 Buell 1125cr, '08 Suzi SV650A, '00 Suzi SV650, '97 328i (with sticky ass tires - I love this car). And the bikes I used to own: '68 Bultaco 100, '69 Honda CL450, '71 Kawasaki Mach III, '71 OSSA Pioneer, '72 Honda MR175, '72 Benelli 250, '75 Yamaha RD350 (then college), '83 Honda VF750F (then kids),'96 MZ Skorpion, '99 R1100S, '01 SV650, '94 Honda VFR750F and '04 R1100S w/Öhlins an' stuff, most wrecked. |
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01-12-2007, 11:50 AM
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Moderator
Join Date: Aug 1999
Location: Austin, TX. USA
Posts: 11,605
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15.3 is getting up there.
Does it change with load? (high beam, grips etc) Popped any bulbs? Verified the 15.3 with a different meter in parallel? i.e. is it really that high?
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99 R11S w/ BBP, InDuct, Öhlins, PVMs, Braking, SJ-Filter, ZTech, HIDs D675 R90Cafe R60/2 M900 SV650-SS CBR150R XR125 & CRF175 Motards OnRoad OffRoad Cycles, Austin, TX: BMW, Ital, Suspension, Electrics Dealer for K-Tech, JRI, GP Suspension, Penske, Öhlins, RaceTech, Elka, Wilbers, IKON & Works www.ororcycle.com CMRA EXPERT #841 Various Formula 5, 6 & 7 championships 2006-2012 A3, Navigator, |
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01-12-2007, 01:31 PM
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Registered
Join Date: Nov 1999
Location: Bellingham WA
Posts: 3,603
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This is higher than I've seen. I was under the assumption that 14.5 or so volts was about the normal upper end of motorcycle electrical systems.
I'd first confirm the voltmeter's accuracy. 14.6 sounds high for the car too. My FJR seems to like to cycle between 14.0 and 14.3 V (with nominal load - lower with load). It appears to be somewhat regular. Others have noted this and consider it inherent in the system. Never instrumented a BMW motorcycle though. - Mark |
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01-12-2007, 02:38 PM
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Registered
Join Date: Oct 2001
Location: Round Rock (Austin), TX, USA
Posts: 1,212
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Back home from a week in glorious Houston. I double (triple) checked with two volt meters. When the radar detector reads 15.3V, both volt meters read 14.6V. I should have suspected this myself. Mystery solved. Thanks.
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Paul. '11 R1200RT, '09 Buell 1125cr, '08 Suzi SV650A, '00 Suzi SV650, '97 328i (with sticky ass tires - I love this car). And the bikes I used to own: '68 Bultaco 100, '69 Honda CL450, '71 Kawasaki Mach III, '71 OSSA Pioneer, '72 Honda MR175, '72 Benelli 250, '75 Yamaha RD350 (then college), '83 Honda VF750F (then kids),'96 MZ Skorpion, '99 R1100S, '01 SV650, '94 Honda VFR750F and '04 R1100S w/Öhlins an' stuff, most wrecked. |
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01-14-2007, 11:01 AM
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Living on borrowed time!
Join Date: Dec 2003
Location: Tacoma, WA, USA
Posts: 7,020
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14.5 is the upper design limit on a typical 12V charging system. 15 and above indicates a problem somewhere, which you discovered as the meter wasn't accurate. Hope it detects radar better than it displays charging voltage
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Better a has-been than a wanna-be 'I am John Andrew Moffett of the Clan Moffat and by god I live, love, seek, fail, grieve and die as I so choose and I call no man master save me'. |
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01-14-2007, 11:39 AM
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Registered
Join Date: Feb 2003
Location: NorCal, Vacaville
Posts: 3,929
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what they all said.
Check with a known real meter and go from there. See what thebattery sees also, 15 is too high.
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Except for a few cases the murderCycle rate is relatively low on this board, keep up the good numbers. |
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01-14-2007, 04:10 PM
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Registered
Join Date: Nov 2006
Location: SF
Posts: 194
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At 15+ V, a wet battery would go dry fast I think. That would also kill gel batteries, that would be a symptom
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tom rides and runs but 4 wheels no more; added a '94 DR350SE goes to Mendocino, F650Dakar captain america sees Baja R12S Red and Silver for cruising, the very first one was Honda C-90 way back when |
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01-14-2007, 07:50 PM
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