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Ignition dilemma
mike the bike:
Don't remind me about differential calculus!
Anyway, I fitted a dyna system as well as Dyna coils a few years back. It now pulls like a train going up hill. The new coils are also rain proof - the OEM ones used to suffer from getting wet, despite all the sealant.
What I like about the Dyna is there's no extra box of electronics to wire in; it's all on the points plate. I had to add an extra lead to supply 12v to the points plate but that was it.
Norniron:
--- Quote from: SteveD CB500F on January 27, 2015, 09:40:46 AM ---
--- Quote from: Trigger on January 26, 2015, 10:30:19 PM ---
Is this the statement that Hondaman wrote ;D
--- End quote ---
Can't be.
The whole point about high performance coils is that they offer a lower impedence and hence generate a higher current when active. The voltage in the secondary (HT leads in this case) is a function of the rate of change of the current (not the level of current itself).
When the points open, the current in the coils falls at a huge rate (1000's of Amps per second) and the large HT voltage is generated in the secondary.
Cutting the current back down to standard won't give you a fatter spark unless the secondary has more copper turns.
When the points are closed, the higher current flows through the coil. It doesn't generate anything at that stage - just burns power!
Steve (BSc Eng University of Sussex 1976-79)
I could do the differential calculus back then...
--- End quote ---
I copied it from his sohc shop page so i presume it is
Trigger:
--- Quote from: Norniron on January 27, 2015, 07:19:33 PM ---
--- Quote from: SteveD CB500F on January 27, 2015, 09:40:46 AM ---
--- Quote from: Trigger on January 26, 2015, 10:30:19 PM ---
Is this the statement that Hondaman wrote ;D
--- End quote ---
Can't be.
The whole point about high performance coils is that they offer a lower impedence and hence generate a higher current when active. The voltage in the secondary (HT leads in this case) is a function of the rate of change of the current (not the level of current itself).
When the points open, the current in the coils falls at a huge rate (1000's of Amps per second) and the large HT voltage is generated in the secondary.
Cutting the current back down to standard won't give you a fatter spark unless the secondary has more copper turns.
When the points are closed, the higher current flows through the coil. It doesn't generate anything at that stage - just burns power!
Steve (BSc Eng University of Sussex 1976-79)
I could do the differential calculus back then...
--- End quote ---
I copied it from his sohc shop page so i presume it is
--- End quote ---
;D ;D ;D
bomber:
I'm so, glad there is someone who struggling with understanding it too.
I thought the answer is simply pay another 99 to DS for electronic ignition... how wrong I was.
Still since I don't have 99 so I have to use original ignition, and it seems it is not a bad idea after all!
Norniron:
--- Quote from: bomber on January 27, 2015, 08:45:23 PM ---I'm so, glad there is someone who struggling with understanding it too.
I thought the answer is simply pay another 99 to DS for electronic ignition... how wrong I was.
Still since I don't have 99 so I have to use original ignition, and it seems it is not a bad idea after all!
--- End quote ---
I bought one from ds for the 400.i had to send it back,really really bad quality.
It was worth paying an extra £25 for the dyna s
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