3310 Holley Carbs

Kirk Morgan · 01-16-2011, 09:50 PM

A friend of mine has a bunch of Holley carbs and parts. I can run a 780 on my stocker. Is there any list numbers or metering plate numbers that are better or more desired. He has a GM replacement carb also that is a 780. Any recommendation or suggestions are welcome.

Kirk

randy wilson · 01-17-2011, 09:51 AM

A 3310 is a 750.

Tom keedle · 01-17-2011, 09:54 AM

Quote:

Originally Posted by randy wilson

A 3310 is a 750.

early ones were designated 780

Bob Pagano · 01-17-2011, 10:29 AM

Engine tech spec gives throttle bore measurements, use that to check the carb. If it matches you can use the carb.

Alan Roehrich · 01-17-2011, 10:40 AM

Either buy a Quick Fuel, or call Clark Holroyd, or Jimmy Bridges, tell them what you have, and send them what they tell you they want. You'll be time and money ahead.

Paul Precht · 01-17-2011, 10:58 AM

On my flow bench an old 3310 flowed 788 CFM, an old 4780 flowed 780. I still have a few old 3310s, I bought about 8 of them from a friend back in the early 70s, Paul.

Jody Lang · 01-17-2011, 02:13 PM

I thought the 3310 with a "metering plate" was a 750 and a 3310 with a "metering block" with replaceable jets was a 780.

Anyone?

Dwight Southerland · 01-17-2011, 07:13 PM

Difference is in the boosters. 780s have drop down boosters, 750s have straight boosters.

Rory McNeil · 01-17-2011, 09:45 PM

Also, the 3310 & 3310-1 have the replaceable secondary jet blocks and are rated at 780, the later (& cheaper versions) 3310-2,3,4 etc use the secondary metering plate and 750 rating. I believe that the later 750 versions also use the Holley manual choke setup, while the 3310 &-1`s that I have owned, always had an automatic choke. Also some of the later carbs used cheap plastic accelerator pump arms, secondary diagpram housings, and manual choke units.

Jeff Lee · 01-17-2011, 10:09 PM

And if your spec allows a 3310 then you can replace the rear boosters to the drop down for a +30 CFM gain and you can also replace the metering plate with a metering block for easier tuning.

01-16-2011, 09:50 PM	#1
Kirk Morgan Member Join Date: Jan 2009 Posts: 226 Likes: 1 Liked 78 Times in 42 Posts	3310 Holley Carbs A friend of mine has a bunch of Holley carbs and parts. I can run a 780 on my stocker. Is there any list numbers or metering plate numbers that are better or more desired. He has a GM replacement carb also that is a 780. Any recommendation or suggestions are welcome. Kirk

01-17-2011, 09:51 AM	#2
randy wilson Senior Member Join Date: Jan 2007 Location: N/A Posts: 882 Likes: 0 Liked 22 Times in 22 Posts	Re: 3310 Holley Carbs A 3310 is a 750. __________________ don,t have one

01-17-2011, 10:29 AM	#4
Bob Pagano VIP Member Join Date: Jun 2002 Location: New Holland, PA Mooresville,NC Posts: 1,163 Likes: 236 Liked 16 Times in 11 Posts	Re: 3310 Holley Carbs Engine tech spec gives throttle bore measurements, use that to check the carb. If it matches you can use the carb. __________________ Bob Pagano A/SA

01-17-2011, 10:40 AM	#5
Alan Roehrich Veteran Member Join Date: May 2006 Location: Murfreesboro TN Posts: 5,095 Likes: 1,541 Liked 1,769 Times in 402 Posts	Re: 3310 Holley Carbs Either buy a Quick Fuel, or call Clark Holroyd, or Jimmy Bridges, tell them what you have, and send them what they tell you they want. You'll be time and money ahead. __________________ Alan Roehrich 212A G/S

01-17-2011, 10:58 AM	#6
Paul Precht Senior Member Join Date: Dec 2001 Location: Elysburg, Pa Posts: 726 Likes: 350 Liked 307 Times in 116 Posts	Re: 3310 Holley Carbs On my flow bench an old 3310 flowed 788 CFM, an old 4780 flowed 780. I still have a few old 3310s, I bought about 8 of them from a friend back in the early 70s, Paul.

01-17-2011, 02:13 PM	#7
Jody Lang Member Join Date: Mar 2002 Posts: 306 Likes: 28 Liked 89 Times in 28 Posts	Re: 3310 Holley Carbs I thought the 3310 with a "metering plate" was a 750 and a 3310 with a "metering block" with replaceable jets was a 780. Anyone?

01-17-2011, 07:13 PM	#8
Dwight Southerland VIP Member Join Date: Dec 2001 Location: Arkansas - In the middle of everything. Posts: 1,999 Likes: 63 Liked 772 Times in 192 Posts	Re: 3310 Holley Carbs Difference is in the boosters. 780s have drop down boosters, 750s have straight boosters.

01-17-2011, 09:45 PM	#9
Rory McNeil VIP Member Join Date: Jun 2007 Location: from Vancouver BC Canada, now in Nova Scotia Posts: 1,307 Likes: 312 Liked 1,089 Times in 298 Posts	Re: 3310 Holley Carbs Also, the 3310 & 3310-1 have the replaceable secondary jet blocks and are rated at 780, the later (& cheaper versions) 3310-2,3,4 etc use the secondary metering plate and 750 rating. I believe that the later 750 versions also use the Holley manual choke setup, while the 3310 &-1`s that I have owned, always had an automatic choke. Also some of the later carbs used cheap plastic accelerator pump arms, secondary diagpram housings, and manual choke units. __________________ NHRA 6390 STK M/S 85 Mustang

01-17-2011, 10:09 PM	#10
Jeff Lee VIP Member Join Date: Jul 2007 Location: Anthem, Arizona Posts: 2,766 Likes: 0 Liked 3 Times in 3 Posts	Re: 3310 Holley Carbs And if your spec allows a 3310 then you can replace the rear boosters to the drop down for a +30 CFM gain and you can also replace the metering plate with a metering block for easier tuning. __________________ Jeff Lee 7494 D/S '70 AMX