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Reply to "Air volume"

The side profile of a Speedster looks a lot like a wing so I don't subscribe to a lot of air entering through the engine lid grille, especially at highway speeds- I think you're far better off to pressurize the area in front of the firewall/over the trans with a scoop from underneath and cut a 6" hole in the firewall in front of the fan (if it's not already there).  By having air flow through the engine compartment (and out the grille) radiated heat from the shroud/cylinder covers/alternator and block will be removed from the engine compartment, the engine itself (fan and carbs) will ingest air closer to ambient temps and will run within normal parameters a greater percentage of the time.  Also make sure the sled tins (and little back pieces that bolt on the rear of the cylinder covers) are installed so spent cooling air can exit and enter the under the car airstream properly, the back is sealed off so no preheated air can enter the engine compartment from around the exhaust and the doghouse cooler air exit has an extension so it's not re-ingested.  I think that's about it...  Al

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