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780 #3310 for racing #2002009 01/30/16 04:31 PM 01/30/16 04:31 PM
Joined: Aug 2003 Posts: 3,580 OH J junkyardmaxie OP master
junkyardmaxie OP master J Joined: Aug 2003 Posts: 3,580 OH	has any one used a 780 single pump vac sec carb for racing with any success ? going on a duster 372 small block small covertor 456-1 spool whats the tricks ? i have a like new one thats the only reason iam considering it what do you think ? thanks

Re: 780 #3310 for racing [Re: junkyardmaxie] #2002014 01/30/16 04:38 PM 01/30/16 04:38 PM
Joined: Aug 2006 Posts: 610 long time lurker, short time p... P PorkyPig mopar
PorkyPig mopar P Joined: Aug 2006 Posts: 610 long time lurker, short time p...	What model, the early style 780 with downleg boosters and a secondary metering block, or the later 750 with straight boosters and a cheap metering plate? Last edited by PorkyPig; 01/30/16 04:47 PM.

Re: 780 #3310 for racing [Re: junkyardmaxie] #2002061 01/30/16 05:49 PM 01/30/16 05:49 PM
Joined: Aug 2003 Posts: 3,580 OH J junkyardmaxie OP master
junkyardmaxie OP master J Joined: Aug 2003 Posts: 3,580 OH	#3310 780 early down leg booster and sec metering block

Re: 780 #3310 for racing [Re: junkyardmaxie] #2002065 01/30/16 05:51 PM 01/30/16 05:51 PM
Joined: Aug 2003 Posts: 43,311 Bend,OR USA C Cab_Burge I Win
Cab_Burge I Win C Joined: Aug 2003 Posts: 43,311 Bend,OR USA	I know stick shift racers that used them as well as automatic tranny guys back in the day Try it How are you ever going to know if it will or not if you don't try it Last edited by Cab_Burge; 01/31/16 01:58 AM. Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)

Re: 780 #3310 for racing [Re: Cab_Burge] #2002080 01/30/16 06:12 PM 01/30/16 06:12 PM
Joined: May 2003 Posts: 1,751 Graham, WA P Polarapete top fuel
Polarapete top fuel P Joined: May 2003 Posts: 1,751 Graham, WA	Originally Posted By Cab_Burge I know stick shift racers that used them as well as automatic tranny guys back in the day Try it, how you ever goiing to know if it will or not if you don't A long tome ago, I used one on my 440 bracket car with some success. Easy to drive, but eventually I worked up to an 850 DP and achieved that cars best ETs and speed. Still a good place to start and you can use the same fittings and linkage on a bigger carb. 1986 Dodge Ramcharger 440 2wd, Bracket Racer Under Construction 1998 Ram 2500 QuadCab, new daily driver. 2008 Honda Element 2014 Carry-On 7x14 Cargo Trailer

Re: 780 #3310 for racing [Re: junkyardmaxie] #2002099 01/30/16 06:38 PM 01/30/16 06:38 PM
Joined: Dec 2014 Posts: 304 Florida M Mark Whitener enthusiast
Mark Whitener enthusiast M Joined: Dec 2014 Posts: 304 Florida	My first year bracket racing, 1983, I was runner up in the sportsman class for the season. Second year I won. 780 vacuum secondary. Mark Whitener [url=www.racingfuelsystems.com[/url]

Re: 780 #3310 for racing [Re: junkyardmaxie] #2002103 01/30/16 06:40 PM 01/30/16 06:40 PM
Joined: Jan 2004 Posts: 8,354 fredericksburg,va C cudaman1969 master
cudaman1969 master C Joined: Jan 2004 Posts: 8,354 fredericksburg,va	Used one on a 383, I set it up like the old DC book showed. They work great with tighter converters, street-strip type. Takes a while to get it fine tuned, but you'll be happy with it.

Re: 780 #3310 for racing [Re: junkyardmaxie] #2002127 01/30/16 07:23 PM 01/30/16 07:23 PM
Joined: Jan 2008 Posts: 2,363 Cotati, CA Dave Hall top fuel
Dave Hall top fuel Joined: Jan 2008 Posts: 2,363 Cotati, CA	I would go with a double pumper for racing. #3310 was made to be a super inexpensive (Super Shops) street carb. Easily tunable (read sell more parts, pump cams, springs, vacuum diaphragms) and safe for street use.

Re: 780 #3310 for racing [Re: Dave Hall] #2002213 01/30/16 09:08 PM 01/30/16 09:08 PM
Joined: Jan 2003 Posts: 5,992 Anoka County, MN L Leigh master
Leigh master L Joined: Jan 2003 Posts: 5,992 Anoka County, MN	2970 total, stock stroke 360, X heads, 4:56 gear, 5100 flash, .557 cam, 1.50 60's, well thought out, hundreds of passes. A B A, each jetted over hundreds of passes, no difference in R4780 and R3310. (780, down leg boosters). It depends on the motor. Enough is enough. Anecdotal opinion from a dumb A@@!

Re: 780 #3310 for racing [Re: Leigh] #2002245 01/30/16 09:58 PM 01/30/16 09:58 PM
Joined: Aug 2003 Posts: 3,580 OH J junkyardmaxie OP master
junkyardmaxie OP master J Joined: Aug 2003 Posts: 3,580 OH	what jets, 50 cc pump, what power valves ? my set up real close to yours

Re: 780 #3310 for racing [Re: junkyardmaxie] #2002246 01/30/16 09:59 PM 01/30/16 09:59 PM
Joined: Aug 2003 Posts: 3,580 OH J junkyardmaxie OP master
junkyardmaxie OP master J Joined: Aug 2003 Posts: 3,580 OH	thanks for all the comments

Re: 780 #3310 for racing [Re: Leigh] #2002305 01/30/16 11:20 PM 01/30/16 11:20 PM
Joined: Jan 2008 Posts: 2,363 Cotati, CA Dave Hall top fuel
Dave Hall top fuel Joined: Jan 2008 Posts: 2,363 Cotati, CA	Junkyard! Do I know you? Just my opinion shat slinger! Get on with your bad self...

Re: 780 #3310 for racing [Re: junkyardmaxie] #2002402 01/31/16 12:51 AM 01/31/16 12:51 AM
Joined: Jan 2003 Posts: 12,296 Benton, IL. D DaveRS23 Special needs idiot
DaveRS23 Special needs idiot D Joined: Jan 2003 Posts: 12,296 Benton, IL.	If you can tune a carb and the carb is sized right for your combo, then you can make most any one work. Some will just take more work and require more changes than others. In other words, the tuner is more important than the carb. I personally like the 3310. A lot. For street cars, it and the new Street Demons are my go-to carbs. But it would not be my first choice for a track car. But that doesn't mean it cannot be a winner in the right hands and on the right combo. As has been noted in a previous post. Master, again and still

Re: 780 #3310 for racing [Re: junkyardmaxie] #2002443 01/31/16 01:50 AM 01/31/16 01:50 AM
Joined: Jan 2003 Posts: 5,992 Anoka County, MN L Leigh master
Leigh master L Joined: Jan 2003 Posts: 5,992 Anoka County, MN	Originally Posted By junkyardmaxie what jets, 50 cc pump, what power valves ? my set up real close to yours I'm sorry, that was 33 years ago! I do remember that combo needed more pump shot, so I used a 50 cc pump. A different cam, converter, manifold combo probably wouldn't need it.

Re: 780 #3310 for racing [Re: Leigh] #2002453 01/31/16 02:01 AM 01/31/16 02:01 AM
Joined: Jan 2013 Posts: 126 Oregon J Jamie McGrath member
Jamie McGrath member J Joined: Jan 2013 Posts: 126 Oregon	My old RR with a 440, 4 spd with 4.56 gears used a 780 carb on top of a M1 single plane and liked it a lot. The trickest part on the whole carb was the .31 squirter.

Re: 780 #3310 for racing [Re: DaveRS23] #2002586 01/31/16 12:22 PM 01/31/16 12:22 PM
Joined: Oct 2003 Posts: 7,506 Az Crizila master
Crizila master Joined: Oct 2003 Posts: 7,506 Az	Originally Posted By DaveRS23 If you can tune a carb and the carb is sized right for your combo, then you can make most any one work. Some will just take more work and require more changes than others. In other words, the tuner is more important than the carb. I personally like the 3310. A lot. For street cars, it and the new Street Demons are my go-to carbs. But it would not be my first choice for a track car. But that doesn't mean it cannot be a winner in the right hands and on the right combo. As has been noted in a previous post. Found this one in a carb junk pile at a swap meet. $25. Works great. The 3310 is one of the all time best street carbs Holley ever sold - and they sold plenty. Fastest 300

Re: 780 #3310 for racing [Re: Crizila] #2002600 01/31/16 12:57 PM 01/31/16 12:57 PM
Joined: May 2005 Posts: 2,010 Apollo, PA. B1MAXX top fuel
B1MAXX top fuel Joined: May 2005 Posts: 2,010 Apollo, PA.	Even though I like and have them on street engines, a vacuum secondary carb is not the best for the track. They aren't as quick to react. You will never get the car to 60 as good as a double pumper. my

Re: 780 #3310 for racing [Re: B1MAXX] #2002673 01/31/16 02:55 PM 01/31/16 02:55 PM
Joined: Oct 2003 Posts: 7,506 Az Crizila master
Crizila master Joined: Oct 2003 Posts: 7,506 Az	Originally Posted By B1MAXX Even though I like and have them on street engines, a vacuum secondary carb is not the best for the track. They aren't as quick to react. You will never get the car to 60 as good as a double pumper. my Fastest 300

Re: 780 #3310 for racing [Re: B1MAXX] #2002676 01/31/16 03:00 PM 01/31/16 03:00 PM
Joined: Jul 2004 Posts: 19,318 State of confusion T Thumperdart I Live Here
Thumperdart I Live Here T Joined: Jul 2004 Posts: 19,318 State of confusion	Originally Posted By B1MAXX Even though I like and have them on street engines, a vacuum secondary carb is not the best for the track. They aren't as quick to react. You will never get the car to 60 as good as a double pumper. my Agree, and I don`t use a vs on anything ever and can get a dp just as clean on the street........... 72 Dart 470 n/a BB stroker street car `THUMPER`...Check me out on FB Dominic Thumper for videos and lots of carb pics......760-900-3895.....

Re: 780 #3310 for racing [Re: junkyardmaxie] #2002833 01/31/16 07:07 PM 01/31/16 07:07 PM
Joined: Feb 2005 Posts: 660 Oklahoma City, OK Dave64 mopar
Dave64 mopar Joined: Feb 2005 Posts: 660 Oklahoma City, OK	I ran a 3310-1 for years and liked the adjustability. It did take a 50cc pump for best results. Won a few track championships using it. DP's will 60 better.

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