G Body shaker hood . . .

[joe_padavano]

You all DO realize that the center of the hood where the shaker is located is a LOW pressure area, right? You're actually sucking air out of the air cleaner. The base of the windshield is high pressure, which is why cowl induction hoods work, and the leading edge of the hood is high pressure, which is why the Olds W-25 hood has scoops there. Scoops in the center of the hood are for looks only.

 

[85_SS]

Joe - while I admit I did the swap almost purely for aesthetics, I can attest to the shaker actually working as a functional air intake. After a rainfall or washing the car, beaded up water around the shaker opening is indeed sucked into the shaker at WOT. This is more likey due to the suction of the engine itself rather than air pressure, but regardless, the main goal of a cold air intake is still achieved.

FWIW, the shaker is mounted fairly close to the windshield, so that proabably does help a touch as well:

 

[Phoenyx]

85_SS

Remind's me of the Canadian Beaumont's, half Chevy half Pontiac

That reminds me of a story.

A buddy of mine, his dad has worked for a GM dealership since the 60s since he was a teen. And back when Beaumont's first came out one was stolen off the lot. It was found down in Montana. So the dealership sent my buddy's dad down to bring it back. When he got there to pick it up the cops asked him, "What's a Beaumont (pronounced Boomont)".

I don't know why, but that always made me laugh.

 

[joe_padavano]

Joe - while I admit I did the swap almost purely for aesthetics, I can attest to the shaker actually working as a functional air intake. After a rainfall or washing the car, beaded up water around the shaker opening is indeed sucked into the shaker at WOT. This is more likey due to the suction of the engine itself rather than air pressure, but regardless, the main goal of a cold air intake is still achieved.

FWIW, the shaker is mounted fairly close to the windshield, so that proabably does help a touch as well:

You're right, and as I've posted in other threads, the cold air is much more important than the non-existent "ram" effect. I just think it's hilarious that most of the factory musclecars had hood scoops that did nothing.

 

[85_SS]

Agreed Joe - my GTO's ram air hood would fall into the category of having little to no effect due to the low profile and positioning on the hood. It's funny how many muscle cars had scoops that were completely fake too, which drives me nuts (part of the reason I had to make the shaker fully functional). Rear spoilers fall under the same category - completely useless at street car speeds...

 

[83hurst-olds]

Rear spoilers fall under the same category - completely useless at street car speeds...

But they look good! 8)

 

[85_SS]

Rear spoilers fall under the same category - completely useless at street car speeds...

But they look good! 8)

Not gonna argue with you there - I'm a sucker for gimmicky flare 😀

 

[deanlemans81]

I think that the shaker on the monte looks pretty neat. You really have to get the 75 and up model with it's more squared off shape than the 70-74 which is more rounded. Go for it. Keep in mind that were 3 or 4 different shaker and base plate combinations used depending on which engine was in the T/A, 301 or 305 or 400 or 403. They had different heights and offsets to place the scoop in the center of the hole in the hood. High performance Pontiac magasine had a 2 part article on these a couple of years ago and may have it posted on their website. Varying the parts may help with positioning.

If they don't have it on line, let me know. I should still have those issues and can scan and send you a copy.
Dean

Oh and here are a couple of pics of a GrandAm with a shaker. Sorry for the small resolution but that's how I downloaded them.

 

[oldtinsmith]

deanlemans81,

That blue Grand Am looks like the one from Hot Rod Magazine that I made mention of earlier in this post 🙂 .

Doug

 

[85_SS]

The early style rounded shaker was used through '76. Early '77 used a low profile more squared off shaker with a pronounced ridge down the middle. Mid-77 through 81 used the same style shaker with a higher profile and more of a rounded ridge on the top.

70-76 shakers all had the larger single opening. In the pic above they are as follows:
-(left) rare early 77 shaker - lower profile with more pronounced ridge (non-functional)
-(middle) late 77-81 shaker (non-functional)
-(right) 70-76 shaker (only 70-72 were factory functional, 73-76 had a riveted/screwed on cover that could manually be removed)

Unlike most other air induction setups of the time, I don't believe shakers ever used a vacuum operated switch - I think they were all solenoid activated.

As mentioned, every engine option had a different shaker (difference was mostly in the base) to centre it properly and have it sit at the right angle/position. I am not sure what my shaker was originally from as I bought it without the metal base but I believe it was from a 400. I found a 305 base online (has a smaller diameter breather ring that I could use with my factory SS assembly) and mounting it involved an 1/2" offset and location/angle modifications to properly align the motor in the Monte engine bay and match the hood angle. I also have a low profile '77 shaker as well as another "tall" 403 shaker as spares should mine ever get damaged.

Here's some links with lots of good information for anyone interested (including the HPP article Dean mentioned):

http://www.78ta.com/scoops.php
http://www.highperformancepontiac.com/t ... index.html
http://www.firebirdtransamparts.com/bri ... shaker.htm