The Spares Company
Club Shop/Regalia
Parent Website
Contact Officials
Machine Registrar
Club Secretary
Membership Secretaries
MPH Editor and Forum Administrator.
Section Newsletters
Technical Databases
Photos
Home
What's new
Latest activity
Forums
New posts
What's new
New posts
Latest activity
Information
Bike Modifications
Machine Data Services
Manufacturers Manuals
Spare Parts Listings
Technical Diagrams
Whitakerpedia (Vincent Wiki)
The Club
MPH Material Archive
Flogger's Corner
Obituaries
VOC Sections
Local Sections
Local Section Newsletters
Miscellaneous
Club Assets
Club History
Club Rules
Machine Data Services
Meeting Documents
Miscellaneous
Essential Reading
Magazine/Newspaper Articles/Letters
Adverts and Sales Brochures
The Mighty Garage Videos
Bikes For Sale (Spares Company)
Log in
Register
What's new
New posts
Menu
Log in
Register
Install the app
Install
Home
Forums
Forums: Public Access
Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Coil Ignition
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Message
<blockquote data-quote="timetraveller" data-source="post: 146714" data-attributes="member: 456"><p>Peter, Ohm's Law is your friend in this but to save you looking it up I calculate that the coil you mention will allow 2.5 amps to pass at 12 volts. That is 30 Watts. However, it is only taking this when the points are closed so, depending upon how long the points are open in any one ignition cycle, you might only use 75 - 80% of that. You would have to look at the cam profile in the distributor to get a better value. It depends upon how your dynamo was converted to 12 volts as to how much it will put out but supposing that it is still no more than 60 Watts, i.e. five amps then somewhere well under half the potential output will be taken by the coil. It will depend upon whether you ride all the time with the headlight on and what power of bulb you use as to whether you will be happy with it. If the dynamo conversion still gives out the original 10 amps then there should be no problem.</p></blockquote><p></p>
[QUOTE="timetraveller, post: 146714, member: 456"] Peter, Ohm's Law is your friend in this but to save you looking it up I calculate that the coil you mention will allow 2.5 amps to pass at 12 volts. That is 30 Watts. However, it is only taking this when the points are closed so, depending upon how long the points are open in any one ignition cycle, you might only use 75 - 80% of that. You would have to look at the cam profile in the distributor to get a better value. It depends upon how your dynamo was converted to 12 volts as to how much it will put out but supposing that it is still no more than 60 Watts, i.e. five amps then somewhere well under half the potential output will be taken by the coil. It will depend upon whether you ride all the time with the headlight on and what power of bulb you use as to whether you will be happy with it. If the dynamo conversion still gives out the original 10 amps then there should be no problem. [/QUOTE]
Insert quotes…
Verification
What was Mr Irving's Christian Name?
Post reply
Home
Forums
Forums: Public Access
Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Coil Ignition
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
Accept
Learn more…
Top