The vacuum is highest at idle, so it is more difficult for any vacuum operated accessory to work at wide open throttle. This model, as the 70 Roadrunner, used a switch to actuate the vacuum system.
I have one of these cars. Flooring the throttle pedal does not open the scoop, it has nothing to do with that. It strictly operates off engine vacuum stored in a canister. There is a switch under the dash that either allows vacuum to bleed off (Off position) or not bleed off (On position) when the engine is running. When the ignition is turned off the vacuum will bleed off regardless of the switch setting. At idle, engine vacuum pull is the lowest, as RPMs increase the pull gets stronger. If you have a big cam, like I do, you have very little vacuum at idle, not enough to keep the scoop fully open. I wire mine fully open, using a semi stiff wire and the actuator’s return spring. My actuator is disconnected from the scoop door linkage, and my Air Grabber system is disconnected from engine vacuum. I have a power brake booster, so I want all available vacuum to go to the booster. When I did have it connected, it would never fully open at idle, only when the engine was turning 3000+ RPMs. At idle it was only about half way open.
Dude this would be awesome to win! We may have to enter!
Two thumbs up on choice and color...maybe later on a '71 Plymouth Road Runner 440 4-spd.
That sounds ALOT like my father's old Plymouth Satellite.
The front wheel drive Omni charger.
The Fresh Air System on a Pontiac is a Ram Air, BUT Dodge called it RAMCHARGER and it was Plymouth that called it "Air Grabber"
Dodge did call it Ramcharger, but they did use the Plymouth Air Grabber labeled On/Off switch under the dash.
Air when you floor it the vacuum drops and the Air Graber pops up to grab air for the wide open throttle.
The vacuum is highest at idle, so it is more difficult for any vacuum operated accessory to work at wide open throttle. This model, as the 70 Roadrunner, used a switch to actuate the vacuum system.
I have one of these cars. Flooring the throttle pedal does not open the scoop, it has nothing to do with that. It strictly operates off engine vacuum stored in a canister. There is a switch under the dash that either allows vacuum to bleed off (Off position) or not bleed off (On position) when the engine is running. When the ignition is turned off the vacuum will bleed off regardless of the switch setting. At idle, engine vacuum pull is the lowest, as RPMs increase the pull gets stronger. If you have a big cam, like I do, you have very little vacuum at idle, not enough to keep the scoop fully open. I wire mine fully open, using a semi stiff wire and the actuator’s return spring. My actuator is disconnected from the scoop door linkage, and my Air Grabber system is disconnected from engine vacuum. I have a power brake booster, so I want all available vacuum to go to the booster. When I did have it connected, it would never fully open at idle, only when the engine was turning 3000+ RPMs. At idle it was only about half way open.
Gull wing.
Bahama Yellow or Butterscotch is NOT one of the "High Impact" colors.
Chargers are all automatic,challengers can have manual