This thread inspired me to experiment and I advanced the base timing to around 15 degrees at which point the engine idle sped up. So I'm taking that as a good sign. On the road the car is a lot keener / more responsive and pulls harder; the exhaust note is subtly gruntier too. On cold mornings, she starts on the button as opposed to the 10-15 seconds of cranking I had before.
I'm using a 280zx dizzy on a stock L26 with 240 SU carbs. Any informed opinions on if this is somehow a bad timing for my engine, given it goes really well now and I don't hear pinking?
OK, dummy questions: how do I find the advance curve for a 12-80 dizzy? I totally get the point of advancing the timing as engine speed rises but why do you need any more advance at part throttle (I.e the vac advance)? What is the theory behind it making the car go any more smoothly?
Apologies if this is a thread hijack, but I thought it was relevant.
Ali K