what size carb?

[jshep34]

i recently purchased this kit from summit.
http://www.summitracing.com/parts/EDL-2087/

my question is what size carb should i run? the car setup is a 440bbc with 727 transmission.

 

[rumblefish360]

A lot of what can/should and what style of carb you like is also determined by the build of the engine and it's primary usage in the car, coupled with gear ratio & tire size, converter stall rating, car weight (OK, it's a B body, LOL, we know, LOL!)

Also, are you going to use the Edelbrock cam? If so, there own recommendations are for the 2 big carbs. Which can be troublesome and annoying. I'll say it like this;

The smaller 750 carb will give a better throttle response. Nice and snappy. Easier to deal with on a numerically low gear ratio and/or bigger tire. 3.55 - 3.21.

The 800 will provide a little more top end. Great if you spend most of your time there. Works even better with a numerically higher gear ratio, 4.10- 4.30 etc.....

The difference between them (Actual performance and feel) and there descriptions are nominal.

Of the Edelbrock carbs offered, I'm partial to the AVS style over the AFB, which can have a flat spot when you mash the gas. This would be the Edelbrock carb I would go with if I had a decent stall and gear ratio; http://www.summitracing.com/parts/EDL-1813/

If you go with a Holley, that would be fine as well. Same as above. For ease of installation, I do believe an Avenger 770 would be a really good unit to use. http://www.summitracing.com/parts/HLY-0-83770/

 

[Budnicks]

Good information I would tend to agree, pretty much... I don't care for the Edelbrock at all, too many tuning issues, once you get them right they are OK, but I would go with the Holley DP 750 or the 770cfm Vacuum Street Avenger & electric choke of the simplest install...

 

[jshep34]

456 gears, cars use is drag racing &, skinny in front, 31 x 13.5 in back tires, 3000 i believe converter. motor is 440 bbc 60 over. going to use edelbrock cam that came with it

 

[SUPERSTOCKRACER]

i love my edelbrocks. i found that the 750 and 800 are almost the same.
tuning is a breeze. i found that jets size out of the box are almost dead on.

 

[lewtot184]

this is a fairly subjective question. any of the larger holley-edelbrock carbs will work. my 2 cents: one ain't enough.

 

[rumblefish360]

Good information I would tend to agree, pretty much... I don't care for the Edelbrock at all, too many tuning issues, once you get them right they are OK, but I would go with the Holley DP 750 or the 770cfm Vacuum Street Avenger & electric choke of the simplest install...

Really! WOW! Um, OK, well, every time I see that, I wonder. This is where the bottom line is though, what ever your happy with or know best.

456 gears, cars use is drag racing &, skinny in front, 31 x 13.5 in back tires, 3000 i believe converter. motor is 440 bbc 60 over. going to use edelbrock cam that came with it

800 cfm carb will be what the engine will like for a drag strip.

 

[Cranky]

Jshep, There's a carb guru in our area if you need any help. At one time I didn't like the Edelbrocks either but this guy has shown his hand with them....

 

[Budnicks]

Better carbs

456 gears, cars use is drag racing &, skinny in front, 31 x 13.5 in back tires, 3000 i believe converter. motor is 440 bbc 60 over. going to use edelbrock cam that came with it

That would be some information that should have been included in you question on what to use... If it's drag car, not really a street car, 1st I would use an electric fuel pump to feed your beast install with a arming switch & a relay to keep voltage spike down & excessive amperage draws down, then I would go with a 1" spacer on top of a single plane 4bbl intake manifold blended to match the openings, then gasket matched to your cylinder heads, there are many to choose from, matched to your camshaft, heads flow & RPM range to your usage & size of carb, have a heat isolation device between the carb & intake, wrap your fuel lines with a heat deflector & keep the fuel cool as possible going into the pump & carb, then use a bypass style regulator & return line back to the tank... A 750-850cfm or larger if necessary a 1050 Dominator same principle applies to the Holley double pumper, 50cc acc. pumps, larger squirters, rear bowl jet extensions & some jetting/tuning, maybe some different adjustable metering plates, power valve blocked off & machined top of the carb. choke area off or buy a Proform or Quickfuel or many other racing specific carburetors that are far more tunable than the basic Carter/Edelbrock or Std Holley DP/HP ... Then Buy The Book "How to tune a Holley Carburetor" would be a great idea also, many tuning tricks & suggestions... Good luck, Happy Moparing..

 

[Budnicks]

Multiple carbs

this is a fairly subjective question. any of the larger holley-edelbrock carbs will work. my 2 cents: one ain't enough.

I too prefer multiple carbs, :iamwithstupid: but it need to be set up properly just like the single 4bb set up...

 

[jshep34]

thank ya sir.

hey cranky pm me his info please

 

[Budnicks]

Issues

Good information I would tend to agree, pretty much... I don't care for the Edelbrock at all, too many tuning issues, once you get them right they are OK, but I would go with the Holley DP 750 or the 770cfm Vacuum Street Avenger & electric choke of the simplest install...

I know there are guys who love them {Carters/Edelbrocks} & swear buy them, I have used them in the past, mostly on muti-carb set ups & I just prefer the Holley or Holley type carbs for racing & ease of tuning, it's just just my preference...

 

[67 B-body]

I know there are guys who love them {Carters/Edelbrocks} & swear buy them, I have used them in the past, mostly on muti-carb set ups & I just prefer the Holley or Holley type carbs for racing & ease of tuning, it's just just my preference...

Me too!!!
Soon to be swapping the 850 out for a 1050 BG Dominator and 4150 adapter plate.

 

[383man]

I like a single holley for driveability and ease of working on. I use the 850 DP on my 493 and I used it on my old 440 also. Works great. Runs real good and drives real good. Course I had to jet up a good bit with the 493. I could most likely use a bigger carb on my 493 but this just drives so nice and runs fine. Ron

 

[FatJack]

Me too!!!
Soon to be swapping the 850 out for a 1050 BG Dominator and 4150 adapter plate.

I like the Dominators too. Have had more luck with off the shelf rather than Barry Grant.

 

[Meep-Meep]

I'm running a 750 AFB on my 440 and it's flawless. Even at the track with slicks and stomping it on the yellow the car just leaves! Carbs need a strong signal to work properly so you should always err on the side of the smaller carb. I did richen the secondaries 4%, which cured the very slight flat spot, and used the orange power piston springs. No other mods from stock settings.

 

[goose69]

Hey SUPERSTOCKRACER and Meep-Meep, Have you guys ever messed with drilling the counterweights on the edelbrock or carter carbs before? We played around with this in the past and corrected a lot of the throttle response lag we had.
I have to say I like different carbs for different applications. I do like the simplicity of the edelbrock and carter carbs for running around town/traveling use (plus being easier to switch out springs and jets so damn quick and easy)but the holleys and BGs for more of race applications.

 

[1stBxMopar]

456 gears, cars use is drag racing &, skinny in front, 31 x 13.5 in back tires, 3000 i believe converter. motor is 440 bbc 60 over. going to use edelbrock cam that came with it

Just my opinion, but I would use the Holley 850 DP, If i remember right it's holley #4781 and it has the biggest venturi size of all the holley 4150 series at 1 9/16"
I have found this to be the quickest on a well modified 440 without going to a dominator or tunnel ram......

 

[jshep34]

850 or higher was what i was thinking. thanks for the info.

 

[fugly]

May have missed it, but what is the upper rpm limit on the engine.....this is highly relevant-that said , if it is race only the 800, and you could use more....also agree with the open spacer and if room permits more than 1.