4bbl on 240?
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Cargo Master
Joined: Apr 2003
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4bbl on 240?
How will a 4bbl perform on a '74 E100 with a 240ci I6? I am looking at the offenhauser dual port 4bbl manifold and 390cfm vacuum secondaries holley. Does anyone know what the cfm rating of the stock 1bbl is?
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Cargo Master
Joined: Apr 2003
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My main concern is low-end torque. I want to improve or at least maintain low-end torque while increasing high end power. I know that bigger usually means low-end loss and mid to high-end gain but the design of the offenhauser manifold looks like it may be able to provide a little of both worlds. Maybe even better fuel mileage.
Junior User
Joined: Apr 2005
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If the primary barrels aren't too big, your low end shouldn't suffer that bad. I'm sure you have to do quite a bit of adjusting on that carb to keep it from bogging when the secondaries open up. I don't see how a 240 could pull that much air without stumbling a bit.
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