what carb to use on 440 build help
- Thread starter yannick47
- Start date
fatecaptured
Well-Known Member
I'm using a thunder series Eddy 800 cfm electric choke. Might switch to a six pack or a dominator later
99ss
Well-Known Member
I would agree about performance for sure.. I swapped the Holley DP for the Eddy to save gas but if I didnt care about mileage and had the heads and was looking for all out best performance I would have gone different. The Eddy was made for bolt on and go street stuff without much work. It can be tuned easily enough to be better but thats not my forteit so I dont touch it.
451Mopar
Well-Known Member
yannick47
Well-Known Member
67 coronet
Well-Known Member
that is the summit copy of the old street avenger holley carb.it will work fine.it was holley atempt to make a simpler two piece carb like carters original design.(now edelbrock)i have used them in the past,and they work good for the street.
Holley 3 barrel 950 CFM Carb. This is list number 3916-1S
These carbs were used on Different 427 cid COPO, Yenko, Baldwin Motion etc.
"If you've ever ridden in a built big block with a well tuned 3 barrel you'll know where I'm coming from"
These carbs were used on Different 427 cid COPO, Yenko, Baldwin Motion etc.
"If you've ever ridden in a built big block with a well tuned 3 barrel you'll know where I'm coming from"
451Mopar
Well-Known Member
I think that is a copy of the Holley 4110/4111 carb. It is harder to work on than the 4150/4160 style. The power valves install under the bowls, so you have to remove the carb to change the power valves. To remove the lid to get to the jets, the choke has to be removed to disconnect / re-connect the choke rod.
I will recommend the Edlebrock 750 (1407). I had one a few years back and it was wonderful. I was drag racing alot on the weekends with my street 440 but it had a slight bog upon wide open acceleration out of the hole that I never figured out. But as I said, it was a great street only carb. Bolt it on and go!!
kjalltrac
Well-Known Member
I´m running the 1407 at the moment on my 440.
It´s a little to rich at higher speeds and idle even with the leanest rods and jets from the edelbrock tuning kit.
Works good at the street but has a little bog when flooring it under about 1600rpm, cant tune it better than this.
One problem I have and so has my cousin, is that when we start our engines when warm, we have to give it some throttle, the 750 edelbrock seems too flood itself a little when the engine has sat for a couple of minutes. We think the problem is todays crappy gas that evaporates to quickly? Both our cars do this.
I´ve tried a race holley 850 dp and this carb never did this. The 850dp also had some more hp up top.
With that said, I´m looking to swap my 750 edelbrock for a quick fuel 780 vacuum sec.
383man
Well-Known Member
One problem I have and so has my cousin, is that when we start our engines when warm, we have to give it some throttle, the 750 edelbrock seems too flood itself a little when the engine has sat for a couple of minutes. We think the problem is todays crappy gas that evaporates to quickly? Both our cars do this.
It sounds like normal heat soak. I have seen many carbs do this. After the hot eng is shut off the eng heat rises and gets the fuel in the carb hot so the gas fumes from the carb bowl go out the internal carb bowl vent right into the eng and it makes the eng run rich after a few minutes when shutting off a warm eng. I always put my throttle about halfway down and wait a minute or so before I restart a hot eng as I know it will be a little rich on a hot restart. Using carb spacers like a wood or phenolic spacer helps alot to keep the heat from reaching the carb. But dont use an aluminum spacer as it wont help insulate the carb from the heat.
I would also say that the Thermoquad is a very good carb but if you dont know how to tune carbs to well I would not use it if you like to work on your own cars. If they act up and you want to work on it you should know carbs and know what your doing as they need to be adjusted right to work good and they have alot of adjustments on them that need to be set right. If you understand carbs and know what your doing with them then the T-Quad can be a great carb and work very good. Ron
It sounds like normal heat soak. I have seen many carbs do this. After the hot eng is shut off the eng heat rises and gets the fuel in the carb hot so the gas fumes from the carb bowl go out the internal carb bowl vent right into the eng and it makes the eng run rich after a few minutes when shutting off a warm eng. I always put my throttle about halfway down and wait a minute or so before I restart a hot eng as I know it will be a little rich on a hot restart. Using carb spacers like a wood or phenolic spacer helps alot to keep the heat from reaching the carb. But dont use an aluminum spacer as it wont help insulate the carb from the heat.
I would also say that the Thermoquad is a very good carb but if you dont know how to tune carbs to well I would not use it if you like to work on your own cars. If they act up and you want to work on it you should know carbs and know what your doing as they need to be adjusted right to work good and they have alot of adjustments on them that need to be set right. If you understand carbs and know what your doing with them then the T-Quad can be a great carb and work very good. Ron
kjalltrac
Well-Known Member
Yes, and the reason for heat soak is probably caused by the ethanol in todays gasoline, if I'm not misstaken the ethanol boiling temperatur is around 172 degrees.
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