Holly 850 Double Pumper

[71customConv]

The local swap shop has a Holley 850 Double Pumper for $50. I just wanted to know if this would work better on my '69 430 than the 750Q-jet. I also would like to know what I would need to do from a linkage standpoint to use it and the vacuum lines.

If it would be that great for me and someone else wants it I can get more info for you to.

Thanks,

[Guy Parquette]

Can you get the "list" number from it?

[71customConv]

If you can tell me were to look, I will go look at lunch and take a few pictures of it.

[72RivGS]

The list number is stamped on the front side of the choke horn. should be 4 numbers and might be followed by a dash with another number but maybe not. For instance on my Holley 750 the list number is 4779-4, just to give you an idea of what you're looking for. Hope this helps.

[Guy Parquette]

If you can tell me were to look, I will go look at lunch and take a few pictures of it.

Sure.
Depending on when it was made it will be in a few different areas. But all Holley's have the list number on them in more than one place, so it should make it easy.

Most likely there will be a number on the choke air horn, sometimes on the metering blocks, and have seen (not to many times) on the base plate.
it should be a four digit # and sometimes followed by a dash and another single digit #:TU:

[Guy Parquette]

The list number is stamped on the front side of the choke horn. should be 4 numbers and might be followed by a dash with another number but maybe not. For instance on my Holley 750 the list number is 4779-4, just to give you an idea of what you're looking for. Hope this helps.

:laugh: you beat me....but wow, it took me 10 minuets to type my resposne:shock:

[sailbrd]

If it is an 850 DP it is a great carb to have modified. The 850 is supposed to have the same venturi size as the 1000 hp.

[71customConv]

I will post the pictures after lunch. I guess the question is still, "Would this work well on a 430?" It is a stock 430 out of a '69 Wildcat and it runs pretty strong. I just didn't know if a double pumper is what I need.

Again if it honestly isn't that much better than the 750Q-Jet(for stock build) that comes with the engine I can pick it up for someone else.

[Guy Parquette]

Matt-
Hope I'm not stealing your thread here.

if anyone is interested I have for sale a new, in the box, never installed, Holley 850 DP. It is the "0-4781C" classic series carb.
New at Summit it sells for $490.00 "with free shipping" but a handling charge of blah blah blah:laugh:

I'm selling for $440.00 with free handling charge but not free shipping:)

And Matt, if you don't want this post here, pm me and I'll delete it.
Thanks,
Guy

[Guy Parquette]

I will post the pictures after lunch. I guess the question is still, "Would this work well on a 430?" It is a stock 430 out of a '69 Wildcat and it runs pretty strong. I just didn't know if a double pumper is what I need.

Again if it honestly isn't that much better than the 750Q-Jet(for stock build) that comes with the engine I can pick it up for someone else.

Yes, depending on what list # is on it I would be gratefull if you could get it for me or tell me how to get it.

as for working on a 430... is it stock? It might be to big for a stock 430, anybody?
Pretty sure you could get it to work with a little jetting though.

[WE1]

The 4781 carb is a great carb. Would it work on a stock 430??? It would work but the fuel economy would be reduced a bunch vs. the QJ. If its tuned right it'll make more power than a well tuned QJ. The Holley is real easy to tune. You'll need to modify the fuel line to run the double pumper carb. For the stone stock engine I think I'd stick with the QJ since you'll spend more time just driving and less time racing. With gas at $3+ per gallon it would most likely be a waste. But if the occassional grin you'll get by stabbing the throttle is worth it then its a great carb. And the QJ can be fine tuned to improve its performance over stock and come close but not overtake the Holley's potential.

[71customConv]

Pictures didn't turn out, but the number on the side look like GR 4237 B.

[71customConv]

If this is to much fuel for the car I think I will stick with the Q-Jet. If anyone does want it here is the address of the shop.

http://www.actionautoofalbertlea.com/

Todd is the guy.

Price was $60 and it will need to be gone through.

I think the number was supposed to be 6R 4237 B

[Joe65SkylarkGS]

I don't think it will do what your looking for. Overkill imo.

Besides I always go brand new on the carbs! Just never had a good experience with used ones.

You race this car?

[71customConv]

Nope. Just a stock 430 in it right now. I found this carb and was thinking about it because a few of my friends run Holleys and have very good luck with them. I don't really want a double pumper. I suppose I really need to learn to tune the Q-Jet. If that works well maybe try and fine a 800 Q-Jet.

We have a 1977 Cadillac Fleetwood we use for a field car that has a Q-Jet on it. I wonder if that is an 800CFM unit. Hmmmmmm.

[Guy Parquette]

was the 4237 on the choke air horn, on the SIDE of the air horn?
that 4237 is a cast number i think.
although 4237 is also an oem number...

[71customConv]

It was on the side. I could not find another numbers. It has mechanical secondaries. Last used on a 400 BBC in a pickup.

[Guy Parquette]

It was on the side. I could not find another numbers. It has mechanical secondaries. Last used on a 400 BBC in a pickup.

huh, I search in my books here and on line @ Holley's site. I show a kit aval. for a 4237 oem number. I even called Holley...they say it's a casting number, but I think he may be on crack or something, b/c I show it as an oem number, just don't know what it's from.
Still looking into it..not to many production cars came with DP's

[71customConv]

I can go back down again tomorrow and look again.

[71customConv]

Hey Guy,

I hope you drink Point. Lynies is bad enough but point might just do you in.

[Guy Parquette]

Hey Guy,

I hope you drink Point. Lynies is bad enough but point might just do you in.

heheh. I used to drink Point in my highschool years (did i just say that?) b/c it was cheap. But it really hurt you the next day...they call it "swamp water" around here.

I also called the guy at the hotrod shop. he gave me a bunch of numbers...none made sense.
Maybe it wouldn't hurt to get some better pix of it?

[71customConv]

I will go down tomorrow and take a better camara. I just had the one on my phone this time.

[71customConv]

Well I went down to the shop. I looked over the whole thing. Stamped on the front of the carb(smaller barrels) LIST 6210 was stamped.

That and all of the patent numbers were it.

[71customConv]

Looks like it is just a 650. The guys have it labels wrong. Wow that was a lot of work for nothing.

[Guy Parquette]

Yep, a 4165 series 650 cfm.

Hey, it was fun while it lasted:beer

Funny a hot rod shop doesn't know what Holley carb they have:puzzled: