Reply to "Delay Mechanical Ignition advance"

Murray, of course Ambient Air Temperature can affect wether you get a pinging or not. But in my case it came gradually as apparently the Springs in my Distributor had weakened slightly hence the early advancing as opposed to the schedule when I set it up when the Distributor was new. I use a K&N Air Filter which does also sucks Air from the Lid of the Filter. Many factors will affect the potential pinging i.e. Air temperature, Engine temperature, A/F ratio, Spark Plugs and obviously Ignition timing and possibly various other factors. I don´t know your Engine specs but I am surprised if you need to provide colder Air via Elephant Ears to prevent pinging. Is your Engine extreme?

I have made my own Engine Cover with Air openings and Louvrers to escape some of the Heat from the Engine Bay, perhaps that helps. (photo before paintshop ;-) )