Demon Carbs
Thread Starter
Racer
Joined: Sep 1999
Posts: 283
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From: Alamogordo, NM
Demon Carbs
Greets
I currently have an Edel Q 795 with .069/.054 (jets/rods) on my 1976. Can't seem to get the car to run without a cloud of fumes during idle not to mention about 16 MPG on the ZZ4 at highway speeds. I have been looking at the Demon for the ZZ4 (650 CFM) but before I make that big investment, I wanted to get some feedback from anyone that may have used those type of carbs.
Thnx
I currently have an Edel Q 795 with .069/.054 (jets/rods) on my 1976. Can't seem to get the car to run without a cloud of fumes during idle not to mention about 16 MPG on the ZZ4 at highway speeds. I have been looking at the Demon for the ZZ4 (650 CFM) but before I make that big investment, I wanted to get some feedback from anyone that may have used those type of carbs.
Thnx
Le Mans Master
Joined: Mar 2002
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From: Coming home from Luckenbach Texas
Race Director
Joined: Sep 2004
Posts: 11,874
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From: Arlington Va Current ride 04 vert, previous vettes: 69 vert, 77 resto mod
i will let you know how i like it in about 2 wks...i'm just fininshing the install of a 650 speed demon, vac sec, electric choke....so far i like it....i didn't like the extra $45 for the fuel line, and the fact i had to buy a throttle stud $5 and the air cleaner stud $3 not that the extra $8 is going to kill me but on a $400 carb they should include that stuff....edelbrock does...
i also made a heat shield and am using a 1/2 spacer....we will have to wait and see if i have a hood clearance issue....which would be resolved by a drop base airfilter....
there are also not very many vacuum ports....just some things to keep in mind...
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i also made a heat shield and am using a 1/2 spacer....we will have to wait and see if i have a hood clearance issue....which would be resolved by a drop base airfilter....
there are also not very many vacuum ports....just some things to keep in mind...
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Last edited by bobs77vet; Dec 29, 2004 at 04:36 PM.
Pro
Joined: Apr 2004
Posts: 687
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From: Atascadero Ca
i have demon on a built 383 stroker, I love it. I have the 750cfm manual secondary speed demon with no choke. However I would read Lars' paper and tinker with the qjet some more before i bought one. The qjet is a great carb with tons of potential. You're complaining about 16mpg on the highway? If i got 16mpg I would throw a party.
Thread Starter
Racer
Joined: Sep 1999
Posts: 283
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From: Alamogordo, NM
Bob
Thnx for the feedback....let me know how it runs....BTW did the accelerator cable bracket come with the carb or did you buy it separately ? Also were you able to get the fuel line hookups to keep the rubber fuel line ?All I have for vaccum is the PCV and power brakes.
i885744: I have all of Lars papers. I have the chart on an Excel file so I can see the diameter of the jets as I switch rods/jets. The MPGs are not as bad as finding a gas station when I decide to take it out in the mountains....
Thnx for the feedback....let me know how it runs....BTW did the accelerator cable bracket come with the carb or did you buy it separately ? Also were you able to get the fuel line hookups to keep the rubber fuel line ?All I have for vaccum is the PCV and power brakes.
i885744: I have all of Lars papers. I have the chart on an Excel file so I can see the diameter of the jets as I switch rods/jets. The MPGs are not as bad as finding a gas station when I decide to take it out in the mountains....
Race Director
Joined: Sep 2004
Posts: 11,874
Likes: 263
From: Arlington Va Current ride 04 vert, previous vettes: 69 vert, 77 resto mod
Originally Posted by JDG/76-ZZ4
Bob
Thnx for the feedback....let me know how it runs....BTW did the accelerator cable bracket come with the carb or did you buy it separately ? Also were you able to get the fuel line hookups to keep the rubber fuel line ?All I have for vaccum is the PCV and power brakes.
i885744: I have all of Lars papers. I have the chart on an Excel file so I can see the diameter of the jets as I switch rods/jets. The MPGs are not as bad as finding a gas station when I decide to take it out in the mountains....
Thnx for the feedback....let me know how it runs....BTW did the accelerator cable bracket come with the carb or did you buy it separately ? Also were you able to get the fuel line hookups to keep the rubber fuel line ?All I have for vaccum is the PCV and power brakes.
i885744: I have all of Lars papers. I have the chart on an Excel file so I can see the diameter of the jets as I switch rods/jets. The MPGs are not as bad as finding a gas station when I decide to take it out in the mountains....
heres the picture of the hard wired fuel line
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Last edited by bobs77vet; Dec 30, 2004 at 08:59 PM.
Drifting
Joined: Nov 2002
Posts: 1,951
Likes: 1
From: Shore NJ
I also use the Speed Demon 650 vac. sec. carb, I removed the choke and used 6AN fuel line with Russell fittings and inline fuel filter. I didn't install a heat shield but use a 1/2" spacer. I'm not sure if the shield works or not, I believe there were some old posts on the pro and cons of using the heat shield and air flow around the carb....... 
