James, that is precisely what I'm thinking about. I was thinking about a sheet of material bolted to the fan shroud that directs air over the carbs as you indicate in your rendering. I think this will work.
Sandy's idea is good, but I don't need a lift. I can mount (securely) my iphone under the hood, on the inner fender, and video tape the air flow with those ribbons as markers.
Also, I am going to do a cold air induction system as well. Perhaps both will do the trick....can't hurt and they sound like relatively easy and fun projects. Also, I'll try an air damn on the bottom of the radiator support to drive more air upwards while driving, perhaps that'll get the temps lower while driving so traffic time is increased.
Reed, your idea would definitely work, but it's more complicated to implement. If the carbs were sheathed in a cool air current there is no way they'd ever overheat.
Still, I think that cool air into the carbs should help considerably. Along with better airflow on the outside, it may do the trick. As I mentioned, clearly my air cleaners are in the worst possible place, they suck in the hot rising air when sitting in traffic.
Also, I'll pull my power valves and inspect them. Perhaps my membranes have ruptured or something. I've heard Holley enthusiasts have this problem, suffer from flooding. There is also the thought of using stronger springs in the power valves so it takes more pressure to force the gas past it. This is run by engine vacuum, perhaps I have plenty to spare as it's a new engine and pulls well (vacuum opens the valve, but when the gas boils it is pressure that pushes them open).
Oh yeah, and there is dialing my fuel pressure regulator down a bit, right.
Thanks so much guys for all your help, I'll provide updates/pics. I do like the Webers, the car runs strong and smooth, good acceleration, fast response, decent gas mileage to boot. I get 23 mpg highway, less than 20 city, but average 19.5 mpg.
Brian
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