Tri power carbs on 440 six barrel?

[33 IMP]

Side hung float bowls, not the cathedral bowls. They are shorter. @Sonny .

 

[Sonny]

Side hung float bowls, not the cathedral bowls. They are shorter. @Sonny .

If I buy the cathedral style carb can i buy and swap to side hung? This is the outboards I was going to buy. Which bowl is that?

Thanks!

 

[33 IMP]

That is the cathedral bowl. We have carb gurus on here that would be able to give you a better answer than me about the bowl change . Woodruff carbs comes to mind. I would check with summit or jegs to find out if side hung bowls are available first.

 

[BSB67]

No Bob, two barrels and four barrels are rated at different depressions. Don't quote me, but two bbls at 3", four bbls at 1.5"

2 bbls are rated at a dP of 3" Hg, 4bbl @ 1.5" Hg. It is not a linear relationship. Pressure changes at the square of flow rate. To go from a flow rate @ 3" Hg to 1.5" Hg divide by the square root of 2.

 

[Sonny]

Is this the correct side hung bowl for a 2300 series carb?

 

[33 IMP]

I dont know for sure, thats why i suggested a carb guru. It looks right to me, its primary side so it has an accelerator pump provision. You would probably be able to use the pump and needle and seat from the cathedral bowl, but you would obviously need the side hung float and linkages.

 

[Daves69]

You need the DC holleys.....

Curious...... are the fuel level sight plugs on those side hung outboard bowls lower than the center carb like the six pack center hung bowls?

 

[Sonny]

I dont know for sure, thats why i suggested a carb guru. It looks right to me, its primary side so it has an accelerator pump provision. You would probably be able to use the pump and needle and seat from the cathedral bowl, but you would obviously need the side hung float and linkages.

Spoke to Holley tech and they confirmed it would.

 

[Sonny]

So hopefully this all comes together. Here are my eBay deals so far (std $ then my $):
Holley 80684 $356 Paid $290 x2
Holley 80683 $398. Paid $299
Holley linkage $172. Paid $75
All new, all free shipping. Will need a side float and bowl for rear carb. And a six pack base plate AND a new intake and....
But I’ll have a six barrel-ish Plymouth!!!

 

[RJRENTON]

2 bbls are rated at a dP of 3" Hg, 4bbl @ 1.5" Hg. It is not a linear relationship. Pressure changes at the square of flow rate. To go from a flow rate @ 3" Hg to 1.5" Hg divide by the square root of 2.

THANK YOU for your insight. You are correct....I guess I was having a senior moment and neglected to factor in the square root rule....
BOB RENTON

 

[Photon440]

2 bbls are rated at a dP of 3" Hg, 4bbl @ 1.5" Hg. It is not a linear relationship. Pressure changes at the square of flow rate. To go from a flow rate @ 3" Hg to 1.5" Hg divide by the square root of 2.

Quick ballpark math is to divide by 1.414 so, the six pack 1350 cfm equals a 955 cfm 4bbl rating.

 

[POMONAMISSEL]

drivers side fuel feeds bowls are ford , that the side ford put it fuel pump on . and fords where all mech as well . so tell me holley made those for chrysler and they just pull them from the ford boxes and put them in chrysler boxes for m/p . i've had the setup as i said .

 

[68 HEMI GTS]

Curious...... are the fuel level sight plugs on those side hung outboard bowls lower than the center carb like the six pack center hung bowls?

I don’t remember off hand. These use a completely different float though anyway. I set them on the bench and haven’t messed with em since. I actually did a lot of work on those carbs. I converted the outboards to have adjustable idle circuits and air bleeds. I also use a 4412 “500” in the center. It’s half of a 750. The 4783 outboards are big carbs. They’re half of an 850 each. They are not the tiny stock Ford carbs.

 

[33 IMP]

@68 HEMI GTS , are those qft metering blocks? I just bought a qft primary block for an ancient 850 dp, hoping to get some adjustment. If they are qft, how do you like them?

 

[68 HEMI GTS]

@68 HEMI GTS , are those qft metering blocks? I just bought a qft primary block for an ancient 850 dp, hoping to get some adjustment. If they are qft, how do you like them?

yes they are. They’re nice blocks. One thing to keep in mind is they have extra emulsion you don’t really need. I end up blocking a few and running two a side. They also come with the IFR high. I prefer mine low so I tap them and use drilled 6-32 set screws. They are also slightly thicker than the stock block. BLP also makes a nice block. I just ordered a few of theirs for a Dominator I’m building.

this is a QFT block from one of my Dominators

 

[70sixpkrt]

So hopefully this all comes together. Here are my eBay deals so far (std $ then my $):
Holley 80684 $356 Paid $290 x2
Holley 80683 $398. Paid $299
Holley linkage $172. Paid $75
All new, all free shipping. Will need a side float and bowl for rear carb. And a six pack base plate AND a new intake and....
But I’ll have a six barrel-ish Plymouth!!!

Did you get the vacuum linkage or the mechanical linkage? Edelbrock used to make the mechanical linkage but not any more.

 

[Sonny]

Did you get the vacuum linkage or the mechanical linkage? Edelbrock used to make the mechanical linkage but not any more.

Holley mechanical linkage.

 

[Sonny]

You need the DC holleys, they actually flow more cfm than the chrysler vacuum carbs! I also run one of those forsaken roundy round 2 barrels for a center carb. Apparently it works like **** from what I’ve read.
View attachment 930534

Does the stock six pack air cleaner base clear the fuel line connections on top of the side hung bowls?

 

[biomedtechguy]

Re: Rochester vs Holley 2bbl carbs per this thread, my experience was the Rochesters leak fuel, often, on many people's cars, to a point where more than one Pontiac Tripower owner said "yeah, they all leak like that"...
Well that wasn't acceptable to me, and now our Tripower on the 421 in the 65 GTO is pristine, and does not leak fuel, anywhere. They have also had internal modifications done, like drilling and component parts swaps, to bring their performance up to the performance enhancements of the 421.
Promax modded my Holley 3x2 system and I'm extremely happy with it, and the non-stick blue gaskets are AWESOME!
As far as I'm concerned, I'd take the Holley 2bbl carbs over the 'chesters ANY day, but I'll +1 the suggestion to go with the FiTech 3x2 system, IT'S FANTASTIC!! (just not right for my future stroker motor)

 

[62MAX]

Re: Rochester vs Holley 2bbl carbs per this thread, my experience was the Rochesters leak fuel, often, on many people's cars, to a point where more than one Pontiac Tripower owner said "yeah, they all leak like that"...
Well that wasn't acceptable to me, and now our Tripower on the 421 in the 65 GTO is pristine, and does not leak fuel, anywhere. They have also had internal modifications done, like drilling and component parts swaps, to bring their performance up to the performance enhancements of the 421.
Promax modded my Holley 3x2 system and I'm extremely happy with it, and the non-stick blue gaskets are AWESOME!
As far as I'm concerned, I'd take the Holley 2bbl carbs over the 'chesters ANY day, but I'll +1 the suggestion to go with the FiTech 3x2 system, IT'S FANTASTIC!! (just not right for my future stroker motor)

What about this ?