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watt the heck #93694
06/05/06 9:34 pm
06/05/06 9:34 pm
Joined: Mar 2006
Posts: 3,746
gastonia nc
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raf940 Offline OP
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raf940  Offline OP
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gastonia nc
can anyone enlighten me as to the draw a 35/35 watt halogen headlight bulb would have compared to the 55/65 and the effect on a triumph charging system?? as in headlight+ Boyer+ tailight= how much strain on system and battery.


1972 Triumph T120
1968 BSA A65
1968 MGB Roadster
1979 Chevrolet Camaro Berlinetta
1969 Honda Mini Trail
1939 farmall f30 tractor
2004 Honda Shadow Aero
1972 BSA Thunderbolt
1975 yamaha xs650b
1972 Norton commando
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Re: watt the heck #93695
06/05/06 10:03 pm
06/05/06 10:03 pm
Joined: May 2005
Posts: 201
sweden
dogge Offline
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dogge  Offline
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Posts: 201
sweden
A 35w bulb will take about 3amp and a 55w bulb will take 4.5amp
it is a huge diffrans..
your charge system if 2 lead original is
about 10amp 3000 rpm..but when you cruise on low rpm the charge will drop to about 4-5amp..
so it is close that the 55w bulb+tail 5w will start draining your battery..

Re: watt the heck #93696
06/05/06 10:19 pm
06/05/06 10:19 pm
Joined: Mar 2006
Posts: 3,746
gastonia nc
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raf940 Offline OP
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gastonia nc
yah by golly that what i figgered....my aftermarket headlite bulb draws lot of juice and i found a source for the 35/35 watt jobs and was just curious.....we have to ride with the headlite on all the time in this fair land of freedom called N.C.


1972 Triumph T120
1968 BSA A65
1968 MGB Roadster
1979 Chevrolet Camaro Berlinetta
1969 Honda Mini Trail
1939 farmall f30 tractor
2004 Honda Shadow Aero
1972 BSA Thunderbolt
1975 yamaha xs650b
1972 Norton commando
Re: watt the heck #93697
06/05/06 11:45 pm
06/05/06 11:45 pm
Joined: Aug 2005
Posts: 1,145
Indy
Vox Teardrop Offline
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Posts: 1,145
Indy
I wouldn't mind knowing where one can find a 35 watt H4 halogen.


95' Triumph Speed Triple
72' Triumph T120
64' BSA Lightning Rocket
Re: watt the heck #93698
06/06/06 12:20 am
06/06/06 12:20 am
Joined: Mar 2006
Posts: 3,746
gastonia nc
R
raf940 Offline OP
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gastonia nc
they are at BikeBandit.com and made by Eiko.......about $8 each.....i ordered mine today.....no way my system can keep a 55/65 watt H4 going i rode with headlite on about half an hour and voltage at posts went from 12.9 to 12.4,,turned off lite and rode a couple more miles and it went back to 12.8....cop friend told me ticket would be $10 but court costs would be $100///if i got caught.makes $8 look pretty good , eh?


1972 Triumph T120
1968 BSA A65
1968 MGB Roadster
1979 Chevrolet Camaro Berlinetta
1969 Honda Mini Trail
1939 farmall f30 tractor
2004 Honda Shadow Aero
1972 BSA Thunderbolt
1975 yamaha xs650b
1972 Norton commando
Re: watt the heck #93699
06/06/06 12:37 am
06/06/06 12:37 am
Joined: Oct 2003
Posts: 11,265
North Georgia, USA
RF Whatley Offline
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RF Whatley  Offline
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Joined: Oct 2003
Posts: 11,265
North Georgia, USA
Raffy -
The fomula is Power = Current X Potential, or going by the units... Watt = Amp x Volts. It's that simple. Now you always want to use a voltage of 12, even though your system is running higher going down the road, because that will give you the "worst case", or the higher, current calculation.

So a 65W bulb at 12V draws 5.4A (at worst). And a 35W bulb at 12V draws 2.9A (at worst). Since the battery gets all the electrical sys leftovers, your battery should see an increase of 2.6A (at best).

If you have a Tympanium, that will be regulated back to about 2A even. So you should really be looking for something like a 45W bulb unless you spend a lot of time at red lights and stop signs.

People forget that charging consists of current AND time.

bigt


Don't hide 'em, Ride 'em !!

RF Whatley
Cornelia, GA
Re: watt the heck #93700
06/06/06 1:25 am
06/06/06 1:25 am
Joined: Mar 2006
Posts: 3,746
gastonia nc
R
raf940 Offline OP
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gastonia nc
that's plum electrafrying...but good to know


1972 Triumph T120
1968 BSA A65
1968 MGB Roadster
1979 Chevrolet Camaro Berlinetta
1969 Honda Mini Trail
1939 farmall f30 tractor
2004 Honda Shadow Aero
1972 BSA Thunderbolt
1975 yamaha xs650b
1972 Norton commando
Re: watt the heck #93701
06/06/06 1:11 pm
06/06/06 1:11 pm
Joined: Oct 2003
Posts: 11,265
North Georgia, USA
RF Whatley Offline
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RF Whatley  Offline
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Joined: Oct 2003
Posts: 11,265
North Georgia, USA
Raffy -
One more thing.... your thinking may be too narrowly focused. That's no flame job, so hang with me a minute....

It's NOT what the headlamp draws that keeps your battery from charging. It's what your entire SYSTEM draws that keeps the battery from charging. eek

You might be able to retain your bright headlamp IF you lower the current consumption of the other items in the system. (Horn, brake lamp and blinkers don't count, since they only come ON intermittently.) That leaves parking lamp, tail lamp, and gauge lamps. So if you install LED tail lamp, and unplug your Parking and Gauge lights, you might be OK.


Start thinking like this... it's the total alternator output (120W), minus the total system needs (headlamp, tail lamp, gauge lights, ignition, etc.) that needs to end up as a positive number. Hopefully this number will be in the +12W to +24W area, which (when divided by the 12V) will result in a 1 to 2A battery charge.

Then TIME also enters the charging equation. The longer time you ride (above 2500 RPM) the lower you can go on the charge current. You'll see these guys on here boast that they run a 65W HL bulb, but they also ride 40 miles to work everyday with no stop signs. That's how they can get away with a 1A charge rate. With nothing but a quick dab of the brakes now and again, the battery receives a continuous and constant charge.

On the other hand, a 20A charge rate won't help you if you only ride 1 block to the local bar. It takes time for the electrical energy to be absorbed by the battery (it is not instantaneous).

Think of it sort of like feeding a baby. You can only feed the baby so fast or it all comes back in your lap. You can feed it a little all during the day, or you can feed it 3 or 4 big meals.... at the end of the day the total consumption is the same. And you still get the same stinking output!

Hope this helps! bigt


Don't hide 'em, Ride 'em !!

RF Whatley
Cornelia, GA
Re: watt the heck #93702
06/06/06 3:32 pm
06/06/06 3:32 pm
Joined: Mar 2006
Posts: 3,746
gastonia nc
R
raf940 Offline OP
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gastonia nc
most of my riding is slow never over 50 mph..we live in a semi rural area but i went to the hospital 3 times in my flaming youth in the 70s from sickle wrecks and dont care to go back....i just like to putt around now....i figured everything i could do to keep power draw down....will look at led tailight next....someone said Beethoven's music was 'simplicity made manifest' i guess these old bikes are like that...


1972 Triumph T120
1968 BSA A65
1968 MGB Roadster
1979 Chevrolet Camaro Berlinetta
1969 Honda Mini Trail
1939 farmall f30 tractor
2004 Honda Shadow Aero
1972 BSA Thunderbolt
1975 yamaha xs650b
1972 Norton commando
Re: watt the heck #93703
06/06/06 3:39 pm
06/06/06 3:39 pm
Joined: Mar 2005
Posts: 61
Ohio
B
Biggerfoot Offline
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Joined: Mar 2005
Posts: 61
Ohio
THIS PLACE looks to have some low watt sealed beams. I have had the same problem with my H4 and have been looking for a low watt solution.

Re: watt the heck #93704
06/06/06 4:14 pm
06/06/06 4:14 pm
Joined: Aug 2001
Posts: 5,099
Stone Creek OH USA
R
Rich B Online happy

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Posts: 5,099
Stone Creek OH USA
If yoru going to putt around, and not run it so the thing can charge, there is a better solution. Replace the standard pilot light with a 23W halogen pilot light available from British Cycle Supply and some others. Leave your halogen main beam alone in case you actually need the light at night. The halogen pilot will give you more than enough light for daytime light requirements.

You did install a replacement headlight unit that has a pilot right? Don't all speak at once..... laugh .


Life is too short to drink cheap, bad beer.
Re: watt the heck #93705
06/06/06 4:27 pm
06/06/06 4:27 pm
Joined: Mar 2006
Posts: 3,746
gastonia nc
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raf940 Offline OP
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raf940  Offline OP
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Joined: Mar 2006
Posts: 3,746
gastonia nc
thanks for the tips.....i gotta a battery tender i have it on for now .....


1972 Triumph T120
1968 BSA A65
1968 MGB Roadster
1979 Chevrolet Camaro Berlinetta
1969 Honda Mini Trail
1939 farmall f30 tractor
2004 Honda Shadow Aero
1972 BSA Thunderbolt
1975 yamaha xs650b
1972 Norton commando
Re: watt the heck #93706
06/08/06 12:17 pm
06/08/06 12:17 pm
Joined: Oct 2003
Posts: 11,265
North Georgia, USA
RF Whatley Offline
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RF Whatley  Offline
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Joined: Oct 2003
Posts: 11,265
North Georgia, USA
God installed a gearbox on the Triumph so you could ride slowly and still have the engine RPM above 2500. Use it.

bigt


Don't hide 'em, Ride 'em !!

RF Whatley
Cornelia, GA
Re: watt the heck #93707
06/08/06 12:47 pm
06/08/06 12:47 pm
Joined: Dec 2002
Posts: 706
B
beltdriveman Offline
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Posts: 706
F

Re: watt the heck #93708
06/08/06 12:57 pm
06/08/06 12:57 pm
Joined: Dec 2002
Posts: 706
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beltdriveman Offline
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Posts: 706
For info only.
My olde 59 ES2 ran around with a 12 volt Wipac Quadoptic headlamp unit fitted with, if memory serves me correctly, a 55w main beam H4 bulb with no problems at all...apart from everyone following me and my real headlamp beam at night...It was fitted with a 120 watt alternator mind you and revs rarely ever went below 3000 when on the move.
Personally I was very impressed with the Wipac unit.I notice there is a pair on E bay for about 35 quid which includes bulbs. They are also available singularly from a company on 0115 9305454. I believe the unit on its own with pilot hole is Wipac number S4700 and known as item 4700 by that company who charge about 25 per unit inc vat and P&P.

Re: watt the heck #93709
06/08/06 2:38 pm
06/08/06 2:38 pm
Joined: Mar 2006
Posts: 3,746
gastonia nc
R
raf940 Offline OP
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raf940  Offline OP
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Joined: Mar 2006
Posts: 3,746
gastonia nc
okay! okay! i'm taking slow and short 'shakedown' cruises to make sure all the bugs are worked out before i go on longer rides...like taking a rebuilt Stearman around the traffic pattern before venturing out....I dont want any 'forced landings'....this is first time this bike has been on the road in god knows how many years....
will wring it out soon


1972 Triumph T120
1968 BSA A65
1968 MGB Roadster
1979 Chevrolet Camaro Berlinetta
1969 Honda Mini Trail
1939 farmall f30 tractor
2004 Honda Shadow Aero
1972 BSA Thunderbolt
1975 yamaha xs650b
1972 Norton commando

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