ML4.1 What formula do you use for calculating ignition advance?
Alpa? You still around?ML4.1 What formula do you use for calculating ignition advance?
Ok, I'll have a look at 1.6/1.8 carb engines. Then you could compare them with 1.6/1.8 injection tables. Twin Spark (the 2L TS) is a different design, must require less advance (like 3.6 against 3.2).Thanks Alpa. Any estimate at what it might be? Does Alfa spec the ignition advance at idle like Porsche does? Anyone?
I had the parentheses wrong. I was corrected on another list. Either formula below works.Alpa? You still around?
Porsche 944S/944S2 with M2.1 using a 60-2 timing wheel uses the following formula to calculate ignition advance. The 23 is a offset which allows negative ignition advance numbers.
= 0.75º X (HEX2DEC(hex#)-23)
My question is does this apply to just Porsche? The Alfa could be calibrated differently.