Shaker hood setup really that much stronger ?

['68StangGT]

Follow me here ...

Cars that came stock from the factory - lets say they are set up the same

for the sake of this discussion - all three are 1970 fastbacks

same engine / tranny / rear gear set up

One has a Shaker Hood

One has the MACH 1 style hood

One has the closed (no scoop) hood

Is the shaker the strongest option ?


Since my main concern is between a MACH 1 kinda hood and a Shaker -

Anyone know of dyno results that show two cars that are basically the same, but one have a MACH 1 style hood and the other a Shaker ?

 

[Hack]

Well, just thinking about your question.. the difference would theoretically be a ram-air effect on the shaker set-up? If indeed there was a difference, it wouldn't show up on a chassis dyno, since the car is not moving.

 

[67GTA-FB429]

The shaker since it is theoritically bringing in cooler air from outside the engine bay there will be more O2 for combustion since it is a denser charge.

 

[mustang70]

Most of the time the Mach 1 scoop wasn't open. At least I think so. The shaker scoop was fully functioning.

You can cut the hood open and make the Mach 1 scoop functional, but then the weather can get in. The shaker has a flap that opens and closes. So it could keep the rain and stuff out if needed.

Not sure if this helps.

 

[D.Hearne]

There's probably not 10 hp difference between the two. And the difference if any would only be at high speeds.

 

['69Mach1Chick]

In the last issue of...i think car craft or hot rod....they show different intake/hood setups and how much hp you get from each.

 

[bnickel]

one thing you can do if you decide to cut the hole under the mach scoop, is to to drill about 4 holes in the bottom of the factory air cleaner base and use a hipo 289 air cleaner lid, like the 69-70 shelby's used, this is the exact same air cleaner assembly used on them but with a different hood. the 69-70 shelby's did not have a flap either, at least that i am aware of, hence the drain holes in the base of the air cleaner. i am useing what i have just described to you, eventually with the correct style air cleaner to hood seal. good luck

 

['68StangGT]

good to know info

thanks

 

[mfp4073]

My father did some cypherin and fiiggerin many years back. And his outcome was that other than getting fresh air to the motor, the ram/shaker hood does nothing to actually "force feed" the motor. I dont remember the speed, but it was pretty fast that you got a ram effect. Basically by the time you get going fast enough for it to help the aerodynamics are more important.

 

[Route666]

At any rate, scoops and shakers are dang cool ideas.

With the shaker too, it has an opening inside the engine bay as well doesn't it?

 

[D.Hearne]

Yea, they still had the "snorkel" sticking off to one side of the cleaner like the others,

 

[67GTA-FB429]

but once the vacuum dropped the flap opened and in comes cool air.

 

[Route666]

Ahh right, so they had a vacuum-controlled flap? That makes it seem reasonable then.