Quote:
Originally Posted by Tom Vaught
Quote from an carb website: "In David Vizard's latest book on Holley, he writes about a gas mileage test he did with a SBC. His conclusion was (paraphrased): the worst mileage came from an unheated or only heat soaked manifold, better was the exhaust heated (but robbed 10 to 12 hp), and best gas mileage was achieved with a coolant-heated intake that held the manifold temperature to between 180* and 190* at a cost of only about 5 hp. This was accomplished by blocking the ports of the crossover and plumbing coolant through it from the radiator."
So Vizard thinks that it works ok.
TV
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Tom,
What was the mileage gained with the heat?