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Carburetors
(Click here to view the original thread with full colors/images)Posted by: Aussie XAXB
My BG Road Demon has idle mixture screws at all 4 venturis. Did or do Holleys have this? I would think you only need to adjust idle mixture on the front two that the car normally runs on. Maybe BG is looking for a more dispersed mixture?
The carb I have is a 625 CFM 4 BBL. with vacuum secondaries.
On my 68 Charger that I built (1983) I put a Carter Thermoquad on. I think it only had adjustment at the front two.
Mostly I just want to talk carbs! I am starving for some familiar territory.
Anybody else running a BG carb?
Steve
Posted by: 69boss429
Quote:
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Originally Posted by Aussie XAXB
My BG Road Demon has idle mixture screws at all 4 venturis. Did or do Holleys have this? I would think you only need to adjust idle mixture on the front two that the car normally runs on. Maybe BG is looking for a more dispersed mixture?
The carb I have is a 625 CFM 4 BBL. with vacuum secondaries. On my 68 Charger that I built (1983) I put a Carter Thermoquad on. I think it only had adjustment at the front two. Mostly I just want to talk carbs! I am starving for some familiar territory. Anybody else running a BG carb? Steve |
www.1969boss429.com
Posted by: Aussie XAXB
With dual quads are those mechanical secondaries?
Remember when the Holley double-pumper was THE carb to have? I had planned on getting a holley for the wife's Mustang until I saw the BG on a friend's car, then I looked into them. It seemed like a good idea as it had newer or later technology behind it. I also like the design of the venturi opennings. Seems more aerodynamic.
They also mention that their carbs flow slightly differently because of the venturi design and this improves performance. I don't remember exactly what they said but I think the speed of the flow was increased so that their carb rated at the same CFM as another carb actually behaved differently because of the greater vacuum while flowing the same volume of air. I am not 100% positive this was it, but it was stated by a BG tech at another message board.
Steve
Posted by: 69boss429
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They also mention that their carbs flow slightly differently because of the venturi design and this improves performance. I don't remember exactly what they said but I think the speed of the flow was increased so that their carb rated at the same CFM as another carb actually behaved differently because of the greater vacuum while flowing the same volume of air. I am not 100% positive this was it, but it was stated by a BG tech at another message board -------- Mine are vaccum secondaries,double pumpers and mechanical secondaries aren't necessary with 1430cfm available.The deamons look good,but the bowls won't work on a dual quad setup.Besides,I'm old school and have plenty of Holley parts to use up.The dual quads are really eye candy under the hood,I have another Nascar manifold for a single 4500 series Holley Dominator but the quads look better to me and have better low end throttle response.
Posted by: Aussie XAXB
I love old school. I am too, but there aren't too many "new" carbs. The BG does have a lot of design attributes that are the same as the Holleys. Many of the parts are interchangeable when it comes to the small pieces.
When I was a Mopar Man I was, and still am, a huge fan of the 6-pack. I had all intentions of putting one on my next 68 Charger. When I had a 68 Charger back in the early 80's I had a brand new Edelbrock 6-pack intake manifold. Holley wasn't reproducing the 2300 carbs for it yet and to find a set at a swapmeet was either too rare (found several set-ups for a 340 6-pack though) or cost more than I could part with so I ended up selling the manifold. I was a newly wed and we had a baby right away so money dried up real fast.
I think it's hard to beat the impact of a multi-carb set-up under the hood whether 3 deuces or dual quads. I really enjoy the "machine" look it gives the engine instead of the "technology" look of EFI. Engines and the cars of the muscle car era were just that, machines.
I've seen people trying to put dual quads on a 289 or a 302 in a street driven car. I usually end up explaining CFM requirements for an engine that size and why it can't use 1000 CFM.
I've got an Australian 1973 Falcon and it's got an Australian 351C in it. Its got a Holley carb already that I may just end up rebuilding when I redo the engine. As much money as I am going to be sinking into this project I need to save money anywhere I can. If I remember correctly the throttle linkage connects on the right side of the carb since the car is a right hand driver.
The engine has the 2V heads which were made differently in Australia compared to the American ones. They are closed chambers and the runner design is better as well. They are very sought after by circle track drivers that can only run factory parts. They are the best of all worlds with a superior runner design, good valve sizing to maintain velocity, and closed, low CC combustion chambers to maintain high compression.
Steve
Posted by: Classiccarplace
Check out www.ClassicFastCars.com. A great new Classic and Muscle Car site!
Quote:
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Originally Posted by Aussie XAXB
I love old school. I am too, but there aren't too many "new" carbs. The BG does have a lot of design attributes that are the same as the Holleys. Many of the parts are interchangeable when it comes to the small pieces.
When I was a Mopar Man I was, and still am, a huge fan of the 6-pack. I had all intentions of putting one on my next 68 Charger. When I had a 68 Charger back in the early 80's I had a brand new Edelbrock 6-pack intake manifold. Holley wasn't reproducing the 2300 carbs for it yet and to find a set at a swapmeet was either too rare (found several set-ups for a 340 6-pack though) or cost more than I could part with so I ended up selling the manifold. I was a newly wed and we had a baby right away so money dried up real fast. I think it's hard to beat the impact of a multi-carb set-up under the hood whether 3 deuces or dual quads. I really enjoy the "machine" look it gives the engine instead of the "technology" look of EFI. Engines and the cars of the muscle car era were just that, machines. I've seen people trying to put dual quads on a 289 or a 302 in a street driven car. I usually end up explaining CFM requirements for an engine that size and why it can't use 1000 CFM. I've got an Australian 1973 Falcon and it's got an Australian 351C in it. Its got a Holley carb already that I may just end up rebuilding when I redo the engine. As much money as I am going to be sinking into this project I need to save money anywhere I can. If I remember correctly the throttle linkage connects on the right side of the carb since the car is a right hand driver. The engine has the 2V heads which were made differently in Australia compared to the American ones. They are closed chambers and the runner design is better as well. They are very sought after by circle track drivers that can only run factory parts. They are the best of all worlds with a superior runner design, good valve sizing to maintain velocity, and closed, low CC combustion chambers to maintain high compression. Steve |
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