Today I will adjust everything and see if with a resonable correction for intake air temperature / water temp, all my problems of pinging get solved: I'm thinking of -2º advance at 40ºC, -4º at 50ºC and -6º at 60ºC, the maximum AIT I've read in my logs until now. I will also remove 2º advance at 90ºC water temp and -4º at 100ºC. So with a massively overheating engine (water at 100ºC and air intake at 60ºC) this would end up removing 10º advance. The car will be a cow but in a safe zone regarding pinging. That's the beauty of an ECU compared to a dizzy, quite useful when the summer comes in October (we will hit 31ºC today in Lisbon) and your stuck in trafic.
Cheers
Diogo
So from reading the above, by the time it's got up to operating temperature you've removed 18 degrees of timing.........
Hopefully not! The figures do not add. With an engine running normaly, at 80ºc water temp and intake air temperature below 40ºc, there is no timing adjustment. You only start adding up above that:
For example with an intake air temp at 50ºC and water temp at 80º (hot day but engine cooling normally), timing is adjusted by 4º+0º=4º
with an intake air temp at 50ºC and water temp at 90º (hot day in traffic, engine struggling to cool), timing is adjusted by 4º+2º=6º
with an intake air temp at 60ºC and water temp at 100º (engine overheating, extreme conditions), timing is adjusted by 6º+4º=10º
Edited by diogoteix, 06 October 2011 - 10:14 AM.
