Classic cars forum & vehicle restoration.
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Mosquito
Joined: 08 Jul 2014
Posts: 3
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 Posted: Sat Jul 12, 2014 10:59 pm Post subject: "Flick of a switch" |
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Someone suggested that you could connect a transistor ignition in such a manner that you could revert to the points at the flick of a switch. That idea rather appeals to me, but I can't figure out exactly how to do the wiring. Below is a diagram for the Velleman K 2543 transistor ignition. Could someone please advise on what type of switch to use and where to incorporate it in the wiring?
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Nils |
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ukdave2002
Joined: 23 Nov 2007
Posts: 4104
Location: South Cheshire
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| Posted: Sat Jul 12, 2014 11:24 pm Post subject: |
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It was probably me, see diagram below, all you need to purchase is a DPDT ( double pole double throw) additional wiring in red.
It could be made simpler as c1 in the Kit is of course the correct value to create the oscillations with the coil, so could be used rather than switching in a traditional "condenser" in traditional ignition mode.
Dave |
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Mosquito
Joined: 08 Jul 2014
Posts: 3
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| Posted: Sun Jul 13, 2014 12:17 am Post subject: |
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| Thank You, Dave! It has saved me a lot of head-scratching. I assume that Velleman nr 1 still connects to the ignition switch? |
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ukdave2002
Joined: 23 Nov 2007
Posts: 4104
Location: South Cheshire
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| Posted: Sun Jul 13, 2014 7:32 am Post subject: |
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| Mosquito wrote: | | Thank You, Dave! It has saved me a lot of head-scratching. I assume that Velleman nr 1 still connects to the ignition switch? |
Yep Vellaman Number 1 still goes to the ignition switch , I could have shown it connected to the coil but was trying to keep the diagram simple.
In a lot if cases it's simpler to mount the traditional condenser outside of the distributor, otherwise you have to run 2 wires into the distributor .
Don't be tempted to leave the original condenser wired in as it would have been originally, if you do this, when running with the electronic ignition on, you will have 2 capacitors (condensers) in parallel (C1 and the original condenser) , this will double the amount of capacitance . Without going too technical the capacitor and the coil work together ; oscillating (a tuned circuit) doubling the capacitance will obviously effect this tuning, which in turn effects the spark. Whilst the car will probably still run, you will have lost as much as gained by putting electronic ignition in !
Cheers
Dave |
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