Carb spacers/Demon
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Lead Driver
Joined: Nov 2000
Posts: 6,637
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From: Albuquerque
Carb spacers/Demon
Hey all, I'm running the Speed Demon 750 on a four hole space and it doesn't do to good when cold. Heat crossover is blocked (not a good idea for the street). I think the spacer is causing icing but I cannot take it out due to clearance problems with the fuel feed lines.
Anyone ever see a four hole 1" spacer with hot water passages? That would be a good product for someone to make. I'd just use it in the winter.
Bear Tracks
Anyone ever see a four hole 1" spacer with hot water passages? That would be a good product for someone to make. I'd just use it in the winter.
Bear Tracks
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Joined: Jan 2001
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From: Virginia
Carb spacers/Demon
Is the spacer aluminum? If it is, I would go ahead and take the manifold off and open up the heat crossover passage. The aluminum spacer should conduct some of the heat up and help a little. Maybe you could consider buying an aluminum spacer if yours is phenolic now. You also may try the original air cleaner on it in the winter only. You are probably running headers, but maybe you could rig a heat shroud over one of the exhaust tubes. Then it would connect to the orig air cleaner snorkel and pull warm air into the carb like it was from the factory.
Elder User
Joined: Jan 2000
Posts: 656
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From: Gravel Switch, KY
Carb spacers/Demon
I did to my truck exactly what Franklin is recommending. I had an open element filter and headers and the truck was very cold natured and I would experience carb icing while it was idling. Using exhaust pipe I made a 2 piece sleeve that clamps around one of my header tubes and run a flexible pipe up to the heated air inlet on a stock Chevy air breather I had laying around. The difference in driveability is remarkable. It's cold weather manners are almost comparable to a fuel injected engine!!! It has alot more grunt down low and driveability is just plain awesome. It will idle by itself at the store while I run in and get a pop, it used to die due to icing.
I highly recommend this mod.
Dannyp
89 F-150 351w 4x4
I highly recommend this mod.
Dannyp
89 F-150 351w 4x4
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Joined: Jan 2008
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Carb spacers/Demon
I have one of those Water heated carb spacers laying around in the garage.
I wasn't sure I want to be putting heat beside a carb in the heat of the summer so I hung it up on a peg.
Cold gasoline/vapour burns better than Hot Gasoline/vapour.
Dennis
Oh....Please Don't Ask Me Any Tough Questions As:
"I'm Saving Up MY Memory For When I Develop Alzheimer's"
78 F-150 429CJ C6 ,Silver w/Explorer Pkge
641/2 Mustang,Pre-World's Fair Car #8092
64 Fairlane S/C waiting for a 390-4spd.
68-Mustang.Sunlit Gold 80,000 miles
I wasn't sure I want to be putting heat beside a carb in the heat of the summer so I hung it up on a peg.
Cold gasoline/vapour burns better than Hot Gasoline/vapour.
Dennis
Oh....Please Don't Ask Me Any Tough Questions As:
"I'm Saving Up MY Memory For When I Develop Alzheimer's"
78 F-150 429CJ C6 ,Silver w/Explorer Pkge
641/2 Mustang,Pre-World's Fair Car #8092
64 Fairlane S/C waiting for a 390-4spd.
68-Mustang.Sunlit Gold 80,000 miles
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Joined: Jan 2001
Posts: 56,997
Likes: 2,744
From: Virginia
Carb spacers/Demon
It's not whether the gasoline is hot or cold, but is it a vapor and stays a vapor. The carb atomizes the fuel into a mist, but if it hits the cold metal of the manifold, it will turn back into a liquid, which the engine will not burn. Also when the fuel is vaporized, it has a cooling effect (like when using an aerosal can) which can actually cause frost to build up on the base of the carb. I would consider heat being blocked from the manifold as something for the racers, not for street driven vehicles.
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