Air Cleaner/Manifold clearance issue

[MikenKym]

Hey Guys,
Just got the transmission installed in my 67 Dodge Coronet, which of course leveled the motor out. The problem is now we cant close the hood. We would prefer not to have to cut a hole in the hood. It's got a 440, Edelbrock Performer manifold & carb. What air cleaner can I use that will breathe & allow me to be able to close the hood? Or am I gonna have to swap manifolds? Any suggestions? It still has the original "K" in it. Has anybody else run into this problem? Any help will be greatly appreciated. Thanks, Mike & Kym

 

[benno440]

get a dropped air cleaner base form summit racing.
put some clay on carb close your bonnet and then measure the clay and that will tell you what size you can put on

 

[Kern Dog]

I'll bet you a kick in the *** that you meant to say Edelbrock Performer RPM intake instead of the regular Performer.
The RPM is taller and is a tight fit. Before Summit started offering the dropped bases for air cleaners, I had to have one made for my 70 Charger. Cutting holes in hoods is for trailer park tweekers. I spent $110 to have a dropped base made to fit my Mopar Performance cast aluminum air cleaner lid and filter. You are lucky. The dropped bases are less than $30!

 

[MikenKym]

True it is the Performer RPM 440 manifold. I should have been more clear. Kern Dog, once you put the dropped base on did you have any issues with the motor "breathing"? And did the dropped base interfere with your throttle linkage? Thanks

 

[benno440]

you wont see any difference witht he dropped base, as the air cleaner will remain same size

 

[dpstark2]

You can get a 1-5/8" drop base air cleaner from Summit and run a 2.25" tall filter. The whole deal cost ~$40. It fits on my '67 Charger, same manifold, same type of carb. It's not a lot of air filter, but it hasn't been a problem. You can get one of those K&N lids that have a filter built in if you're really concerned.

 

[HYRDGOON]

You can get a 1-5/8" drop base air cleaner from Summit and run a 2.25" tall filter. The whole deal cost ~$40. It fits on my '67 Charger, same manifold, same type of carb. It's not a lot of air filter, but it hasn't been a problem. You can get one of those K&N lids that have a filter built in if you're really concerned.

Like so!

 

[Kern Dog]

True it is the Performer RPM 440 manifold. I should have been more clear. Kern Dog, once you put the dropped base on did you have any issues with the motor "breathing"? And did the dropped base interfere with your throttle linkage? Thanks

More clear? Hey.. No biggie. I was just kidding around.
My air cleaner is the non traditional, Mopar common size, not the generic parts store 14" version. Regardless, the car runs tip top!

 

[MikenKym]

We've got the dropped base air cleaner on, picking up the thinner filter this morning. We're hoping this will fix our problem.

 

[benno440]

Use the formula below to compute the minimum size filter required for your particular application. The usable portion of the filter is called the EFFECTIVE FILTERING AREA which is determined by multiplying the diameter of the filter times Pi (3.1416) times the height of the air filter in inches, then subtracting .75-inch. We subtract .75-inch to compensate for the rubber seals on each end of the element and the filter material near them since very little air flows through this area.

A = effective filtering area
CID = cubic inch displacement
RPM = revolutions per minute at maximum power

Example: A 440 CID mopar engine with a horsepower peak at 5,500 rpm.

A=440 x 5500 / 20839 = 116.12 square inches surface area.

a 14 x 3 inch air filter with an open top like the k& n style will be 175.84 square inches, a 14 x 3 air cleaner with closed top lid will be 131.88 square inches.

14 x 2 will be 87.92 for a sealed top and 131.88 for open top

 

[fratzog lover]

However, more than one engine builder has stated the pleated top element disrupts airflow resulting in no improvement in hp. YMMV.