Steve,It seems that the AFB dual quad setup worked best for your HP and reliability.
How was mileage compared to a single four or tri-power setup; I mean was there a glaring difference in fuel use with the dual quad when cruising because of both carbs metering fuel through idle circuits...?
Gary Pavlovich----- Original Message ----- From: "Steven Charette" <stevec@xxxxxxxxxxxxxxxxxxxx>
To: <1962to1965mopars@xxxxxxxxxx> Sent: Tuesday, November 24, 2009 6:08 AM Subject: RE: Holley carb ID - warning - long read
Rich, Back in the good old days there were the the 650 through 850 cfm double pumpers with mechanical secondaries, and the 3310 vacuum operated secondary which they then referred to as the 780. The double pumpers were 4150 series carbs, which had metering blocks front and rear, and were dual feed. IIRC they were numbered as follows: 600cfm 4776 650cfm 4777 700cfm 4778 750cfm 4779 800cfm 4780 850cfm 4781 The standard accelerator pump body was only about 5/16" tall, therewas a 50cc "Rio" pump that was maybe 7/16" or 1/2" tall that was used on thefronts on some of the larger carbs. We used to put the Rio pumps on thesecondaries on 850's to help 440's launch better. 383's seemed to like the750's better. The 3310 was also a 4150 series carb with metering blocks front andrear and dual feed. There was a large dashpot on the passenger side of thecarb that opened the secondaries; the rate was adjustable by changing colored springs in the dashpot. Most of the OE carbs found on Mopars were 4160 series single feed carbs with an aluminum transfer tube that ran from the front bowl to the rear bowl. The floats, unlike the aftermarket carbs which were externally adjustable, were internally adjusted with the adjustment hole plugged by discs that were prone to leakage. These carbs also had a metering plateunder the secondary bowl (in lieu of a metering plate) that resulted in thecarbs being about 1/2" shorter (front to rear) than the 4150 series.Unfortunately the metering plates had the metering cast in as opposed to thereplaceable jets of the metering blocks. The Holleys seemed to be plagued by leaks, blown power valves, stuck floats, and needed all kinds of flaky vent tubes, jet tubes, and other widgets to get them to work right. It also seemed that you had to change the jets every time the sun went behind a cloud. But as hard as we tried,we couldn't make the AFB/AVS carbs of similar flow ratings run as fast. Weeven ran a six-pack for a while, with both OE carbs and aftermarketreplacements, just for the thrill of all these problems multiplied times 3.We tried all kinds of different gaskets but after 2-3 weeks of sitting,you'd turn the fuel pumps on and the carb looked like a lawn sprinkler. Wefinally gave up and started running twin AFB's - and never looked back. I recall throwing a hot 383 in my '63 wagon, and rather than the Torker/750 (which was virtually guaranteed to cause a fire) that was on the shelf,grabbed an old 343hp dual quad setup that hadn't been used in years. I blewthe dust and bugs out, bolted it on, and went for a ride. Never had totouch the carbs for the 2 years the car was together, and the carbs went onto my 70 Sport Fury GT for another 2 years before (future at that point)wife #2 decided she didn't like the stares the car got (Black on Black with Black interior, blacked out bumpers, etc - we called it Darth Vaders's staffcar). A whole lot of cars in the Tri-Cities saw a whole lot of taillights because of those carbs... but I digress... Eventually Holley started making spread-bore carbs (4165 series?) to replace Quadrajunks, and then special replacement carbs for other applications, as well as the 4500 Dominator series. I always try to lookfor the older 47XX series or the 3310 just so I know what I'm looking at... anything else is like a box of chocolates - you never know what you're gonnaget - and that's all I have to say about that. Information above is guaranteed to be 89-90 percent accurate. Only problem is figuring out which part is the other 10%... SC -----Original Message----- From: Rich Kinsley [mailto:rlkinsley@xxxxxxxxx] Sent: Monday, November 23, 2009 10:35 PM To: 1962to1965mopars@xxxxxxxxxx Subject: RE: Holley carb ID I don't know squat about Holley carbs, yet. I just thought they were all double pumpers? Thanks for all the input. Rich Kinsley '64 Dodge Polara 4dr 318poly w/goodies ==================================================================== Steve Charette wrote:Rich, IIRC the 3310 was a square bore vacuum secondary carb that they usedto refer to as a 780cfm. I've seen it recently as a 750, but I don't recall them having a rear accellerator pump. SC -----Original Message----- From: Rich Kinsley [mailto:rlkinsley@xxxxxxxxx] Sent: Monday, November 23, 2009 6:10 PM To: 1962to1965mopars@xxxxxxxxxx Subject: Holley carb ID Rich Kinsley '64 Dodge Polara 4dr 318poly w/goodies I have a Holley carb that I'd like to ID. I was told it's a 750cfm. It's a 4bbl double pumper with 3310-6 and 2959 stamped on the choke air horn. There's a P-80 cast on the main body side. Under the air filter gasket area there's a 6R 6931 and the sec nozzles are ^SR-107. Can anybody ID it correct? ----Please address private mail -- mail of interest to only one person -- directly to that person. I.e., send parts/car transactions andnegotiations as well as other personal messages only to the intended recipient, not to the Clubhouse public address. This practice will protect your privacy, reduce the total volume of mail and fine tune the content signal to Mopar topic. Thanks! '62 to '65 Mopar Clubhouse Discussion Guidelines: http://www.1962to1965mopar.ornocar.org/mletiq.html.Rich Kinsley '64 Dodge Polara 4dr 318poly w/goodies ---- Please address private mail -- mail of interest to only one person --directly to that person. I.e., send parts/car transactions and negotiationsas well as other personal messages only to the intended recipient, not to the Clubhouse public address. This practice will protect your privacy, reduce the total volume of mail and fine tune the content signal to Mopar topic. Thanks! '62 to '65 Mopar Clubhouse Discussion Guidelines: http://www.1962to1965mopar.ornocar.org/mletiq.html. ----Please address private mail -- mail of interest to only one person -- directly to that person. I.e., send parts/car transactions and negotiations as well as other personal messages only to the intended recipient, not to the Clubhouse public address. This practice will protect your privacy, reduce the total volume of mail and fine tune the content signal to Mopar topic. Thanks!'62 to '65 Mopar Clubhouse Discussion Guidelines: http://www.1962to1965mopar.ornocar.org/mletiq.html.
---- Please address private mail -- mail of interest to only one person -- directly to that person. I.e., send parts/car transactions and negotiations as well as other personal messages only to the intended recipient, not to the Clubhouse public address. This practice will protect your privacy, reduce the total volume of mail and fine tune the content signal to Mopar topic. Thanks! '62 to '65 Mopar Clubhouse Discussion Guidelines:http://www.1962to1965mopar.ornocar.org/mletiq.html.