Where's the accel pump?
Thread Starter
Pro
Joined: Aug 2001
Posts: 605
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From: hamilton square NJ
Where's the accel pump?
Don't get me wrong, I'm fine with digging into the carb. I'm just wondering how do I get to the accel pump on the Road Demon so I can change the pump cam and see how that affects the off idle response. If anyone has a diagram of the carb, that would be greatly appreciated. :cool:
Burning Brakes
Joined: Dec 2000
Posts: 795
Likes: 0
From: Madison MS
Re: Where's the accel pump? (fontking1a)
I'm looking at a picture of a Demon in a Summit catalog and I can see the accel pump. It is in the exact same location as the pump on a Holley. The pump cam will be on the primary throttle shaft on the driver's side.
dl
dl
Race Director
Joined: Dec 1999
Posts: 11,094
Likes: 990
From: Sierra Foothills CA
Re: Where's the accel pump? (xfactor974)
The accel pump cam is what moves the arm, which in turn pushes on the diaphram inside the small housing, which in turn squirts fuel out of the squirters at the top of the carb. The cams for Holleys are hard plastic & come in different colors- Demons should be similar if not identical but I'm really not sure. You can get a kit w/ different cams in it at a speed shop fairly cheap.
Changing squirter size can also help you tune your carb.
Changing squirter size can also help you tune your carb.
Safety Car
Joined: Apr 2001
Posts: 4,795
Likes: 1
From: Regina Saskatchewan, Canada.
Re: Where's the accel pump?
This is where the pump and pump cam are loacted on a Holley style carb:
This is the acc. pump itself
And the little blue thing is the pump cam:
Are here's the pump cam:
[Modified by Stingy74, 4:39 PM 3/28/2002]
This is the acc. pump itself
And the little blue thing is the pump cam:
Are here's the pump cam:
[Modified by Stingy74, 4:39 PM 3/28/2002]
Thread Starter
Pro
Joined: Aug 2001
Posts: 605
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From: hamilton square NJ
Re: Where's the accel pump? (Stingy74)
I love it when you post pics stingy :D . Sounds good guys. I'm new at fooling with the carbs so I'll look into this later on the weekend. I bought the pump cam kit from Holley in hopes that they would be similar. Everything else has been. :cheers:
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Thread Starter
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Joined: Aug 2001
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From: hamilton square NJ
Re: Where's the accel pump? (xfactor974)
I just looked. I found a pink cam there. Is this the stock cam on the holley's too? I noticed you have a blue cam there stingy, how's it accelerate with that one?
Safety Car
Joined: Apr 2001
Posts: 4,795
Likes: 1
From: Regina Saskatchewan, Canada.
Re: Where's the accel pump? (xfactor974)
I just looked. I found a pink cam there. Is this the stock cam on the holley's too? I noticed you have a blue cam there stingy, how's it accelerate with that one?
Thread Starter
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Joined: Aug 2001
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From: hamilton square NJ
Re: Where's the accel pump? (Stingy74)
The accel pump pumps to compensate for off idle throttle right? Would that get rid of my off idle flat spot? Maybe the motor wants some gas but is getting choked.