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12-04-2006, 05:17 PM
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CC Member
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Join Date: Dec 2001
Location: San Diego,
CA
Cobra Make, Engine:
Posts: 2,979
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Look at the Holley site:
http://www.holley.com/0-80509-1.asp
and look at the 4150 HP series carb. Double Pumper, mechanical secondary with a metering block, accel pump and power valve on both the primary and secondary sides. Part #: 0-80509-1
You can't see the second pump lever on the pic that Sal posted because it's on the other side of the carb and the picture doesn't show it.
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12-04-2006, 05:21 PM
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6th Generation Texan
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Join Date: Feb 2002
Location: Devil's Backbone,RR 32,
TX
Cobra Make, Engine: Lone Star Classics #240,Candy Apple Red,Keith Craft 418w - 602 HP,584 TQ
Posts: 8,157
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Not Ranked
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12-04-2006, 05:24 PM
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CC Member
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Join Date: Apr 1999
Location: cleveland,
OH
Cobra Make, Engine: CSX4000, 427
Posts: 1,999
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Holley 4224 and 9776 are mechanical secondary carbs without a secondary accelerator pump. But, they are for a special application. I got this off of a description.
Notes: This has a mechanical secondary, but no secondary accelerator pump circuit. It is designed for a mulitiple carburetor application ONLY, it will not function properly on a single carburetor application.
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"After jumping into an early lead, Miles pitted for no reason. He let the entire field go by before re-entering the race. The crowd was jumping up and down as he stunned the Chevrolet drivers by easily passing the entire field to finish second behind MacDonald's other team Cobra. The Corvette people were completely demoralized."
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12-04-2006, 06:10 PM
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CC Member
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Join Date: May 2004
Location: Palm Coast,
FL
Cobra Make, Engine: Shelby American CSX 4241 - authentically built
Posts: 2,573
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Quote:
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Originally Posted by Anthony
Holley 4224 and 9776 are mechanical secondary carbs without a secondary accelerator pump. But, they are for a special application. I got this off of a description.
Notes: This has a mechanical secondary, but no secondary accelerator pump circuit. It is designed for a mulitiple carburetor application ONLY, it will not function properly on a single carburetor application.
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The 660s are meant for dual carb setups, but the 450 can be either dual or single.
I've been running these carbs on my brothers ProStreet Mustang for the past 5 years, and they have performed flawlessly.
__________________
Sal Mennella
CSX 4241, KMP 357 - sold and missed, CSX 4819 - cancelled, FFR 5132 - sold
See my car at CSXinfo.net here >> CSX 4241
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12-04-2006, 06:41 PM
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CC Member
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Join Date: Jun 2003
Location: Freedomia,,
Il
Cobra Make, Engine: Coupe,Blue w/white stripes SB; Roadster, Blue w/white stripes BB w/2-4s; SPF installer/Hot Rod-Custom Car builder
Posts: 1,376
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Not Ranked
Thanks for the info Sal. I had forgotten about the center squirters. While they were several sizes made there are now only a couple, actually, I only saw on that wasn't a marine one. For Anthony, it has a single 50cc pump up front and uses a nozzle in the middle of the carb to spray both primaries and secondaries. They way they are able to do this is by making the secondaries 1:1 with the primaries, where as the double pumpers have a "progressive" secondary and need the extra pump since they do not open simultaneously with the primaries. While you could potentially operate one on the street it would be pretty twitchy. As noted they are race carbs, designed for 2-4 set ups, also notice there is no choke.
That's the 600cfm 4224. The 9776 isn't listed in my Holley catalog, although it is listed in the reference pages of parts. So it may or may not be a center squirter like the 4224.
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WDZ
Last edited by Woodz428; 12-04-2006 at 06:52 PM..
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12-05-2006, 06:44 AM
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Senior Club Cobra Member
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Join Date: Dec 2001
Location: Shasta Lake,
CA
Cobra Make, Engine:
Posts: 26,594
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Just a note as everyone else has covered the technical issues of this. In the Jegs Catalog that I have, the Double Pumpers are listed in a separate group and it says Double Pumper on the top. Then they list the carb. numbers and sizes. The actual heading as I look at the book is " Classic Double Pumper" and it then gives all the sizes from 600 cfm through 850 cfm, in either the normal copper finish or the zinc finish. Some not in that group are double pumpers and will list the size of the primary and secondary pumps. Others will say mechanical secondaries, which aren't double pumpers.
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12-05-2006, 09:14 AM
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Senior Club Cobra Member
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Join Date: Jul 2002
Cobra Make, Engine:
Posts: 15,712
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I was previously running the 660 center squirters. When they were working you could actually FEEL the difference between them and the vacuum secondaries I currently run. They were FAST!
WHEN they were working, tough to dial in and tough to stay dialed in. I called them 'nervous' carbs on the street. They were like on or off.  |
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