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Which value to set ignition timing to? - Engine & Ancilliaries/Gearbox - The Lotus Forums - Official Lotus Community Partner Jump to content


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Which value to set ignition timing to?


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Seems like a simple question and probably is!  The manual states the following:

  • 7 BTDC @ idle (vacuum)
  • 25 BTDC @ 3500-4000rpm

I'm not using the vacuum advance so should I still aim for 7 BTDC, or should I just try to tune for 25 degrees at 3500-4000rpm?

 

But then on this site (http://www.belchamber.org/techdist.html) it states:

  • When timing the car rev it to 4500 and set the timing at that rpm to 44 deg

So which one is the best to go for, for when my timing light comes in?

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a 79 eclat on points should be a spec 5 907 engine with a 23D4 distributor.

I would use 9 degrees BTDC static and with a strobe look for advance towards 25 degrees at 3.5K rpm.

Roger that and thanks. I'll replace points (trying to remember to gap them in the process) while I'm in the distributor changing the condenser. Have read something about greasing the distributor. Is it just the central shaft I have to put a dab of grease or somewhere else too?

I hate not knowing simple things about these (older) cars so am really appreciating all this advice.

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I ditched the points in favour of a magetic pick up. Its really simple to do and very cheap. No more issues with points. The magnetic pick ups can be got on ebay very reasonable. I also ditched the ballast resistor and coil in favour of a 12 V high energy coil. Again from ebay.

That and in conjunction with the high torque starter, I have no issues with starting or running of the engine.


Roger that and thanks. I'll replace points (trying to remember to gap them in the process) while I'm in the distributor changing the condenser. Have read something about greasing the distributor. Is it just the central shaft I have to put a dab of grease or somewhere else too?

I hate not knowing simple things about these (older) cars so am really appreciating all this advice.

A dab on the shaft for the points I would imagine.

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