850 CFM Holley Carb

72Satellite440 · Jan 30, 2011

Got a deal on this carb for 275$ a while ago and just curious if any of you use it /could give me any tip on additional parts I should buy for it. Was used once on a dyno aparently...

http://www.holley.com/0-4781C.asp
Should I get it rebuilt?(looks super clean)
upgrade jets? (Im no expert)
Do I need elec choke mod or is manual ok
Any Advice would help, Thx
850 CFM Four Barrel Street/Strip CarburetorPART #: 0-4781C

Revhendo · Jan 31, 2011

Um, a gasoline credit card?
Seriously, what is your intended use for your car? That's a big double pumper for a street car with an auto trans. Refresh my cobwebs and list out the rest of your combo.

72Satellite440 · Jan 31, 2011

Lol gas card, well I definitly dont want to be underpowered

69 440- bored .60 over
-4.150"Eagle stroke forged crank
-Eagle Forged H-beam conecting rod
-SRP pistons-flat top
-Crower Cam-Hydraulic Roller Steel Billet
-Crower Hydraulic roller lifter set
-Milodon oil pump/windage tray/oil pan
-Indy Cylender heads
-Indy intake 4150

Transmission- to be rebuilt this year(Stage 2 shift kit)
Rear 8 3/4 sure grip 489 case 455 gear

67 B-body · Jan 31, 2011

Use it!
I bet it's right on the money for your CID and top RPM expected. There is a handy calculator on Holley web site that you can use to verify. I would think about jet extensions on the rear jets for hard launchs, and also once you get a good manifold vacuum reading at idle you'll be able to select the correct power valve to install. The jets usually come pretty close for the rated CFM. You'll need to read the plugs to be sure though. I assume you have a higher stall convertor already in the car..... If you don't then the "double pump" might be a bit much on the low end.

Meep-Meep · Jan 31, 2011

You better have a lot of motor!

67 B-body · Feb 4, 2011

http://www.holley.com/applications/CarburetorSelector/CarbSelection.asp

Cranky · Feb 6, 2011

Since you have it, give it a shot but DP's are not too good on gas when used in town driving but can be pretty good out on the highway but it depends on your 'foot action'.....

6PKRTSE · Feb 6, 2011

I ran an 850 DP on one of my old 440 71 Challengers that was bone stock except for headers. That carb woke that car up a ton. It loved it. Who drives these cars for mileage anyway? I say run it.

72Satellite440 · Feb 6, 2011

thx guys , im going to run it

rp23g7 · Feb 6, 2011

I have one on my 440, sweet carb, it gets about 9-12 mpg, but who cares

67 B-body · Feb 11, 2011

rp23g7 said:
I have one on my 440, sweet carb, it gets about 9-12 mpg, but who cares

No kidding...... These are MUSCLE CARS..... LOL! Ground pounding,, Road ripping POWER!!!! "Tim Allen sound clip" OOH OOH OOH!!:bootyshake:

cj's mopar · Feb 12, 2011

Its Our God Givin Right to Burn as much gas as posible !
I LIKE when all my neigbors buy hybirds cause i want thier GAS !!!!!

shag766 · Feb 12, 2011

i have one on my bb chovel and it worked great. i don't know what they put on my new motor yet.
i wish it had elec. choke for early and late summer though.

p.s. good price

maddawg57 · Feb 12, 2011

I am running a 850 Proform street series carb with electric choke on my 500 stroker. It performs n functions rather well for street use.

maddawg57 · Feb 12, 2011

This is what I run in the summer when I want to run the car harder.

maddawg57 · Feb 12, 2011

Your 850 Holley should be just fine, and its nice having a choke when it's cold out.

383man · Feb 15, 2011

I run this 850 DP on the mild 440 in my 63 Ply. All I did was change the P/V and jet up a tad. I also drilled the pump shot on the primary side and removed the choke valve. It runs great as I was going to do more to it but it runs so well now I left it alone. Very nice carb. Ron

Revhendo · Feb 15, 2011

383man said:
I run this 850 DP on the mild 440 in my 63 Ply. All I did was change the P/V and jet up a tad. I also drilled the pump shot on the primary side and removed the choke valve. It runs great as I was going to do more to it but it runs so well now I left it alone. Very nice carb. Ron

Runs so well now I left it alone? You mean we can do that? LOL. Looks great. What type of intake is that?

383man · Feb 15, 2011

That is the Holley Street Dominator and thanks. Ron

Cranky · Feb 15, 2011

If I thought that he cared about mileage, I wouldn't have said to give it a shot but some are surprised at how bad it can be. Run it but make sure you don't run too rich as it can wash your cylinder walls and everyone knows how good that is for your rings :bootyshake:

850 CFM Holley Carb

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