Re: 10% Ethanol & Percolating Fuel???
The most effective way to cool an intake manifold is to provide an air gap between it and the lifter gallery. There are some insulating (possibly phenolic) intake/plenum gaskets used by the ricers, but I have not been able to find any for V-8 engines. The primary reason that some intake manifolds were provided with a splash pan, was to prevent the oil splash from "coking" when exposed to the extreme heat of the exhaust crossover passage in the intake manifold. Intakes without exhaust crossover (e.g. Rochester fuel injection plenums, and aftermarket intakes without carburetor heat) NEVER were provided with splash pans, because their purpose in that instance would be moot. The intake manifold, once in direct contact with the engine block, will quickly achieve the same temperature due to conduction, that's why an air gap is necessary.
I see merit in Bill's cool can idea, which has worked for years. Another idea worth trying would be to insulate the fuel lines. Finally, you should consider insulating coatings for the fuel carrying components of the fuel injection unit. These coatings are very effective in lowering temps when applied to combustion chambers and piston crowns.
If you add a heat exchanger to the fuel line in a hot environment, I would think that it would have opposite the desired effect, since it will transfer heat from the engine compartment to the cooler fuel. The fuel is (relatively) cool while it is in the tank, the best way to prevent boiling (especially with side exhaust) is to insulate the fuel line from the tank, all the way to the induction system.
I don't like the idea of painting the inside of any engine with varnish! Its usefulness might be marginal on a full race engine using a high volume oil pump, but certainly a waste of time on any engine using a standard volume pump.
The most effective way to cool an intake manifold is to provide an air gap between it and the lifter gallery. There are some insulating (possibly phenolic) intake/plenum gaskets used by the ricers, but I have not been able to find any for V-8 engines. The primary reason that some intake manifolds were provided with a splash pan, was to prevent the oil splash from "coking" when exposed to the extreme heat of the exhaust crossover passage in the intake manifold. Intakes without exhaust crossover (e.g. Rochester fuel injection plenums, and aftermarket intakes without carburetor heat) NEVER were provided with splash pans, because their purpose in that instance would be moot. The intake manifold, once in direct contact with the engine block, will quickly achieve the same temperature due to conduction, that's why an air gap is necessary.
I see merit in Bill's cool can idea, which has worked for years. Another idea worth trying would be to insulate the fuel lines. Finally, you should consider insulating coatings for the fuel carrying components of the fuel injection unit. These coatings are very effective in lowering temps when applied to combustion chambers and piston crowns.
If you add a heat exchanger to the fuel line in a hot environment, I would think that it would have opposite the desired effect, since it will transfer heat from the engine compartment to the cooler fuel. The fuel is (relatively) cool while it is in the tank, the best way to prevent boiling (especially with side exhaust) is to insulate the fuel line from the tank, all the way to the induction system.
I don't like the idea of painting the inside of any engine with varnish! Its usefulness might be marginal on a full race engine using a high volume oil pump, but certainly a waste of time on any engine using a standard volume pump.
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