Teach me about dual quad intakes

[jk66gt350]

Here's a picture of the drivers side of my Holley 2 x 4 setup if this helps.

[JMobley]

Here's the drivers side.  Using an original fuel log and linkage. 

[TA Coupe]

Here's a couple of pictures of mine plus a couple more induction "porn" pictures. Pictures of my 2x4 set up are with the TA intake and 2 460 carbs

      Roy

[Wedgeman]

Thanks guys, Great Pics !!

[shelbydoug]

I presume that the last picture is a Boss 302 with dual Dominators? How about a picture with the air cleaner off?

[gt350hr]

    The Shelby coupes and Cougars ran the "BJ-BK" carburetors. I have seen numerous pictures where the ink stamped list numbers were visible. They are the ones pictured in Phillip's Bud Moore photos.The vacuum operated secondaries were quickly dropped ( as they didn't "close" quickly enough) in favor of a cam operated mechanical secondary modification designed by Harold Droste (rip). They were always mounted "forwards", never backwards on the T/A cars. The third and final revision was to incorporate the "center squirt" discharge nozzle which led to the public release of the 660 and 850 center squirter carbs. Interestingly the 3360-3361 carbs were only on the "street" manifold. When you bought ( in the day) the T/A style induction kit from SAI , it had 1850 ( 600cfm) carbs on it and no hose between the secondaries like OEM Ford dual fours.
   Randy

[Dan Case]

    The Shelby coupes and Cougars ran the "BJ-BK" carburetors. I have seen numerous pictures where the ink stamped list numbers were visible. They are the ones pictured in Phillip's Bud Moore photos.The vacuum operated secondaries were quickly dropped ( as they didn't "close" quickly enough) in favor of a cam operated mechanical secondary modification designed by Harold Droste (rip). They were always mounted "forwards", never backwards on the T/A cars. The third and final revision was to incorporate the "center squirt" discharge nozzle which led to the public release of the 660 and 850 center squirter carbs. Interestingly the 3360-3361 carbs were only on the "street" manifold. When you bought ( in the day) the T/A style induction kit from SAI , it had 1850 ( 600cfm) carbs on it and no hose between the secondaries like OEM Ford dual fours.
   Randy

Shelby American system serial 4. Note mechanical secondary cams.

[shelbydoug]

It's interesting to note that in effect this is where the Holley "double pumpers" originated from.

Considering how the Boss 302 Shelby car started out for '69 with the dual 'Dominators' I'm a little surprised there isn't an IR manifold for the Windsors run in 67 similar but I guess that was evolution and needed time to get to that point?

[gt350hr]

   Doug,
     The in line head would not flow enough air AND the "dominator" as it became known was not even a pipe dream in '67 let alone '68.  I have a hand made ( Harold Droste rip) double pumper. I haven't confirmed if GM or Ford paid to have the double pumper made. Ford paid for the center squirter , Chrysler paid for the three barrel , and Ford paid for the "4500" series as it was known. GM was the first to use a double pumper on a "production" engine , but the one I have is pretty early. You can see the choke and non choke main bodies in Dan's photos in the single squirter carbs. Prototype Center squirters all had the air horn milled off. I have several sizes of them in my collection.
  Randy

[shelbydoug]

   "Doug,
     The in line head would not flow enough air AND the "dominator" as it became known was not even a pipe dram in '67 let alone '68.  I have a hand made ( Harold Droste rip) double pumper. I haven't confirmed if GM or Ford paid to have the double pumper made. Ford paid for the center squirter , Chrysler paid for the three barrel , and Ford paid for the "4500" series as it was known. GM was the first to use a double pumper on a "production" engine , but the one I have is pretty early. You can see the choke and non choke main bodies in Dan's photos in the single squirter carbs. Prototype Center squirters all had the air horn milled off. I have several sizes of them in my collection.
  Randy"

Too bad that you don't do pictures?

[TA Coupe]

I presume that the last picture is a Boss 302 with dual Dominators? How about a picture with the air cleaner off?

Here you go:

    Roy

[427heaven]

If memory serves me right I believe the original Dominators were 1200 cfm each. Then became 1300 and 1350 cfm I have always wondered how a small block could run on that, crazy.

[1109RWHP]

I think it was 1050 and 1150.

So out of all the people who have dominator setups has anyone tried to run them? A lot of them plan on it but has anyone actually done it.

[SFM5S000]

Back to the 289/302 dual quad optional manifolds. There is/was the Shelby RamBox which was discussed here on the forum. I'm still contemplating & shopping carb options (I'm thinking dual NASCAR type 390cfm or 450cfm DP's). For my stroker 326/331.
Anyway, this manifold was yet another option in 8V but these days more desirable in 4V configuration.

Happy Holidays,
~Earl J

[427heaven]

The Chrysler Hemis ran something like that and they were called Rat Roasters. I believe they were for more torque applications then top end speed? Anyone actually use one or dyno one to see how they run?