I've been thinking about this more. I think we can all agree that it makes sense for a racecar in Florida and not for a bone stock car in Canada. So what's the break point? Dataway made some good points about changes since the cars were designed. Some fuel has ethanol in it. Ethanol content varies. Engines have Fe/Fe, Fe/Al, Al/Al parts. Also agree that it should be blocked for fuel injection? Warming the intake helps when the engine is cold and carbureted. What's a good intake/carb temp target when it's fully warmed up? Aluminum intakes warm up quicker but also dissipate more. Lots of variables for blanket statements I believe.
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