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EFI Intake?????

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Old Sep 24, 2003 | 09:35 PM
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TruckDrivinFool's Avatar
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EFI Intake?????

I can't be the only one to think of this but here goes.....

Would a guy gain anything if he could figure a way to mount a carb on one of the big EFI manifolds? Wouldn't it act like a tunnel ram? I would also think it would give a smoother flow than a log.
 

Last edited by TruckDrivinFool; Sep 24, 2003 at 09:38 PM.
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Old Sep 24, 2003 | 09:51 PM
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From: Broken Arrow, OK
EFI Intake?????

Yes it would act like a tunnel ram. Unfortunately, that is not a good thing for a 300. A tunnel ram by design provides excellent gains at very high rpm while sacrificing low speed torque and driveability. Fuel distribution is usually very poor at low speeds with a tunnel ram. The only reason the EFI intake works well on an EFI engine is because no fuel is carried in the intake. In order to make the EFI intake work well with carburetion you would probably need to take the lower portion and use 6 individual 1 barrel carbs on it. That would work very well over a wide rpm range and have excellent driveability once properly tuned, which is a chore all its own.
 
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Old Sep 25, 2003 | 10:43 AM
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As long as I'm dreaming/thinking wouldn't it be easier, as far as mounting and tuning, to make a plenum box to mount atop the EFI bottom intake and run either 3 1bbl or 2 2bbl cards? Not just from the point of less carbs to sync but also would give some crossover feed as opposed to 1 carb for each cylinder.

Secoundly would you think I would gain or lose compared to the likes of a clifford multicarb intake? Since they carbs would be just dumping into a basically open box.
 
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Old Sep 29, 2003 | 06:02 PM
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It depends on your point of view. Fewer carbs mean fewer parts to change to arrive at the best tune. Unfortunately, the fewer carbs you have the less optimum each cylinder will be. The common plenum under the carbs will allow some crossfeed that is needed when you feed more than one cylinder with a carb. With individual carbs you would probably run a carb that flows about 300 cfm on each cylinder, so there really wouldn't be much restriction.

I don't know how it would compare with the Cliffy intake, I've never used one.
 
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