Tuesday 20 January 2009

Spitfire Electronic ignition Part 2

Well Ive got the vellman unit and soldered it up in standard form. I have now connected it to the car as shown below.


Not quite the perfect installation but good enough to try it out, the reel of PTFE tape is just the insulator required. I will need to box it, and i will most likely pot the PCB to stop ingress of damp that could kill it. I will also change the connectors for lucas type connectors and clip the unit properly to the top of the coil. Hopefully it should look like it has always been there once i have finished.

So does it work, of course it does, but it has got a comedy effect. Since the vellman unit is standard i cannot use the straight 12v feed from the ignition switch. The car starts but only when the ignition switch is turned back to normal running mode. At this point the engine is still spinning so starts. if you keep turning the key it won,t start. I sort of guessed this so no problem.

It didn't help that i wired it to the car incorrectly Doh. definitely works now. Also it appears to work ok with the full 12V feed on startup.

Apart from this low RPM running seems more stable and reving the engine is better, the exhaust note has also changed slightly. Performance on the road does not apear to be any better but it's early day on that from.

The pcb stays very cool so it is not getting near overheating so once i have used the car for a longer run and am satisfied that the unit will work i will reconnect the 12v feed and see what happens. At this point my guess is that it will work ok, we will see.

Once i have done 50 plus miles and 20 or so starts from hot and cold i will introduce the electronic dizzy module to the mix. After that a nice high powered coil will complete the package.

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