Air cleaner plumbing, is 6" pipe enough for a 545?

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Air cleaner plumbing, is 6" pipe enough for a 545?

Post  paperman on May 31st 2016, 1:54 pm

Off road truck with a mild 545. 9.5:1, low .600 cam, A429 head, 1250 Dominator carb. I want to run from an air box on the fender to the carburetor, the box draws from the cab. Will 6" aluminum pipe be enough to feed it?

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Re: Air cleaner plumbing, is 6" pipe enough for a 545?

Post  maverick on June 1st 2016, 3:38 pm

I'd say it's big enough, given that this is an off road truck. Your biggest restriction is probably gonna be the filter. Since the filter is a requirement here, don't sweat it. That filter is MUCH more important on an off roader than maximum airflow.

That said, I did fab up an air inlet deal years ago on a race-only 514 "Ranger, kinda like the headlight inlets with ducts on the '64 Thunderbolts. I fabbed an airbox on the Dominator and used a pair of 4 "flex ducts. With no fliter to restrict the system, the car laid down like an old hound, probably because of screwed up air turbulence at the venturis....lost enough e.t. that I tossed the system in the trash at the track. My needs for airflow on a drag race car were MUCH different than yours, tho. I'd go ahead and do it.
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Re: Air cleaner plumbing, is 6" pipe enough for a 545?

Post  paperman on June 1st 2016, 3:48 pm

I plan to use a large truck filter, Wix 42790, with over 350"'s of surface area compared to a standard 3x16 with just over 150. I see the area of my 6" is well above the total throttle bore size just wanted see of you all could throw a red flag in the air. Thank you.

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