Mighty Demon Idle Eze problem & gasket question. - Page 3 - Hot Rod Forum : Hotrodders Bulletin Board
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  #31 (permalink)  
Old 02-01-2012, 09:44 PM
CCK CCK is offline
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Idle Eze Pics.

Well. i found my Pics. First time up loading on here so hang in there.

Try not to cut the seat up, just in case you ever want to close the valve.

When you start opening the window width, try to clock the windows so they line up with the slots as best as you can.

If you cut slots in the gasket, leave 1/8th inch between the center hole & the slots, to hold the gasket together.

I cut the gasket last, but now that I think of it, By blending the bottom of the slot in the body down into the floor of the counterbore, it might have made some needed space under that last 1/8th inch of gasket.
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  #32 (permalink)  
Old 02-01-2012, 09:56 PM
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More pics.

More pics.
One shows the stock slots and counter bore with the step between the slot floor and the counterbore floor.
The other is fuzzy but hope you notice the step from the slot floor now has a smooth radius down into the counterbore floor.
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Name:	Slot CB Blend.JPG
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  #33 (permalink)  
Old 02-01-2012, 10:08 PM
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The last pic shows how I learned that changing the height of the hole does very little with the screw travel allowed.
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  #34 (permalink)  
Old 02-02-2012, 05:41 AM
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Summit has 3 rebuild kits for BG carbs$22.87 to $34.25
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Old 02-02-2012, 09:14 AM
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Thanks Kev. Looks like your camera wanted to focus on the distance instead of what you actually wanted. The last picture I assume was taken before you made any changes?
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Old 02-18-2012, 12:37 PM
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Gasket Mod

Here is what I meant about the gasket mod.
The idea is to open the roof of the passages as much as possible and still hold the gasket together.
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Old 02-19-2012, 10:39 AM
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Gasket mod. try try again.

For some reason the pic didnt load.

Made a paper example of the gasket mod I was talking about.
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  #38 (permalink)  
Old 02-20-2012, 08:45 AM
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Thanks, I'll be getting back into it this week. I also have three Jeep projects cooking at my house, and it's hard to decide what to work on.

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Old 03-07-2012, 09:21 PM
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Had another thought.

I have never tried this, but if you pulled the adjusting screw completely out and put the carb back together, it might be an easy way of getting a ball park idea of what the engine needs.
As long as the air cleaner stud is in and locked down, I think the slots in the carb body might limit the air flow enough to keep the idle RPM from not going too high.
It wouldn't be adjustable but it would be a cheep and easy experiment.

If you try this let me know the outcome.
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Old 03-07-2012, 10:58 PM
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Unfortunately pulling the stud out completely made no difference. I just met with a guy tonight who says he's a Demon carb expert. I offered beer and pizza and he accepted. So, we will see what happens. I'm about ready to just throw in the towel and go with the new MSD Atom FI.

EDIT: I have never tried to run it with the EZ screw out. At first I didn't think that was what you meant, but reading a second time I thing that IS what you meant. But, I can't imagine running with the EZ Idle screw out, anyway the minute I put the air cleaner stud in it should mess that up anyway, right?

Not related but I finally got the hydraulics working on the Jeep.
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  #41 (permalink)  
Old 03-10-2012, 08:43 AM
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My thinking is that if the screw was out, and the stud in, the slots from the bores to the center would be the only thing metering the air flow. You would be completely over riding the windows in the jet.

If you pulled the stud out without the screw down in the jet, I think you would notice a big change. Probably WAY too much air, as it would be going right down the stud hole and through the screw hole which is pretty big.

If you didn't see a big change then this would tell me we would have to make a bigger jet with bigger windows and with a bigger screw.
It's a pretty simple design and wouldnt be hard to make.
(I'm a tooling designer & prototype machinist in the aircraft industry.)

This could probably be checked by pulling the jet out and running it without the stud, but I cant imagine it needing that much air.
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