OK -- slightly dumb question.
What is a safe figure to assume for engine compartment ambient temperatures? Semiconductor companies seem to agree that the automotive temperature range is -40C to +85C, but that's at the part, and you need some temperature drop to the outside world for heat to flow.
I'm sure the answer is some variation of "that depends on what part of the engine compartment", so to qualify, I'm thinking of places where one may reasonably mount electronics, like inner fenders or the firewall. If there were a chart somewhere that listed spots and expected high temperatures, that would be a nice reference.
Thanks.