[cdog]

My car will do this, but only in extreme heat. Like idling on Las Vegas Blvd. in July.

Maybe try a KN filter and KN Xtreme lid. That could spread the heat out and maybe up.

Also, what manifold do you have? Maybe a low rise manifold gets hotter. I have a Torker II which is low rise and can get this issue.

How about slapping some big ass electric fans on the engine? How about lowering your thermostat temp?

Do you guys think that adding a return line could somehow help?