Quick Fuel 780 SSR carb

FINESPLINE · 03-25-2011, 04:04 PM

Not exactly the type of day to make a record run. He should try Atco in the spring or the Dutch in the fall. That motor was sucking some air !

Jeff Lee · 03-26-2011, 02:14 AM

The QF 780 has metering block on the rear, the 3310 has a plate. The QF has 4 corner a/f screws, the 3310 has primary only. The QF has adjustable vacuum to the secondary diaphragm to control opening rate, the 3310 requires a spring change. The QF has replaceable air bleeds were the 3310 bleeds are fixed. The QF has throttle blade angle adjustment on the secondaries that is external and easy to get to. The QF is much lighter & made of aluminum, the 3310 is cast zinc (?).
I still like the classic gold of the 3310 best.
That's basically it. Oh, retail for the 3310 is about $275 and the QF is about $525

Greg Hill · 03-26-2011, 09:01 AM

Jeff the original 3310 has a metering block in the back and was rated at 780 cfm.

Adger Smith · 03-26-2011, 09:12 AM

I have an e-mail from Mike Baker that says the Quick Fuel carbs are approved in IHRA. I was asking for one of my Crate Mtr. customers.
The blocks in the back of 3310's came on the 3310-1 and -2's Rated 780. They then went to some plastic parts and changed the down leg boosters to straight leg and re rated the later 3310's to 750. Those had the plates in the rear. My memory on the change might be a little fuzzy. It might have changed with the 3310-3 to 3310-4. I'm almost positive all the 3310-1's and 2's have rear metering blocks. I guess I could dig out my old Holley books and check it.

John Lang · 03-26-2011, 10:20 AM

Adger, Your right on the secondary metering blocks ! 3310-1-&-2 !..........John

Ron Miller · 03-26-2011, 10:32 AM

I never knew a 3310-2 was a 780 c.f.m with a secondary rear metering block. I thought any thing after 3310-1 was a 750 c.f.m with a plate. I will keep a eye on the -2 next time at a swap meet.

Dwight Southerland · 03-26-2011, 10:33 AM

Adger - You are basically right. The change to the plate and straight boosters was part of the production definition of the -3 and later carbs. I have seen a -2 carb with straight boosters and a block though.

Then there is the original "3878261-EH LIST-3310" carb that was the start of it all . . . .

Bill Harris · 03-26-2011, 11:57 AM

I thought that carb was legal only in SS. Is it a legal replacement for a 780 in stock?

Kirk Morgan · 03-27-2011, 10:55 AM

Were you running the carb with or without a power valve.

Adger Smith · 03-27-2011, 01:32 PM

Kirk,
The new David Cook (DC Carbs) 3310-1 carb I'm trying out has a PV in the front and blocked in the rear. It is not the .025 over bore version and had a nice fuel curve. Of course the jetting is not square F to B , but the fuel flow- A/F ratios look good. Up to now I've always run a std bore # 4779 750 by Da Vinvci. I'm not a big fan of PV's but this is the way he sent it and I'm going to try it that way. It does stay clean when idling and at low RPM.

03-25-2011, 04:04 PM	#1
FINESPLINE Senior Member Join Date: Apr 2010 Location: Island of high taxes, N.Y. Posts: 541 Likes: 0 Liked 1 Time in 1 Post	Re: Quick Fuel 780 SSR carb Not exactly the type of day to make a record run. He should try Atco in the spring or the Dutch in the fall. That motor was sucking some air !

03-26-2011, 02:14 AM	#2
Jeff Lee VIP Member Join Date: Jul 2007 Location: Anthem, Arizona Posts: 2,766 Likes: 0 Liked 3 Times in 3 Posts	Re: Quick Fuel 780 SSR carb The QF 780 has metering block on the rear, the 3310 has a plate. The QF has 4 corner a/f screws, the 3310 has primary only. The QF has adjustable vacuum to the secondary diaphragm to control opening rate, the 3310 requires a spring change. The QF has replaceable air bleeds were the 3310 bleeds are fixed. The QF has throttle blade angle adjustment on the secondaries that is external and easy to get to. The QF is much lighter & made of aluminum, the 3310 is cast zinc (?). I still like the classic gold of the 3310 best. That's basically it. Oh, retail for the 3310 is about $275 and the QF is about $525 __________________ Jeff Lee 7494 D/S '70 AMX

03-26-2011, 09:01 AM	#3
Greg Hill VIP Member Join Date: May 2006 Location: Louisville , KY Posts: 1,995 Likes: 69 Liked 279 Times in 68 Posts	Re: Quick Fuel 780 SSR carb Jeff the original 3310 has a metering block in the back and was rated at 780 cfm. __________________ Greg Hill 4171 STK

03-26-2011, 09:12 AM	#4
Adger Smith VIP Member Join Date: Dec 2001 Location: Texarkana Ark/TX Posts: 2,446 Likes: 575 Liked 880 Times in 311 Posts	Re: Quick Fuel 780 SSR carb I have an e-mail from Mike Baker that says the Quick Fuel carbs are approved in IHRA. I was asking for one of my Crate Mtr. customers. The blocks in the back of 3310's came on the 3310-1 and -2's Rated 780. They then went to some plastic parts and changed the down leg boosters to straight leg and re rated the later 3310's to 750. Those had the plates in the rear. My memory on the change might be a little fuzzy. It might have changed with the 3310-3 to 3310-4. I'm almost positive all the 3310-1's and 2's have rear metering blocks. I guess I could dig out my old Holley books and check it. __________________ Adger Smith (Former SS) Last edited by Adger Smith; 03-26-2011 at 09:20 AM. Reason: sp

03-26-2011, 10:20 AM	#5
John Lang Member Join Date: Oct 2003 Location: Sheboygan Wi Posts: 391 Likes: 0 Liked 6 Times in 2 Posts	Re: Quick Fuel 780 SSR carb Adger, Your right on the secondary metering blocks ! 3310-1-&-2 !..........John __________________ John Lang 365 STK, SS

03-26-2011, 10:32 AM	#6
Ron Miller Member Join Date: Mar 2002 Location: Brownstown, Mi 48134 Posts: 196 Likes: 35 Liked 13 Times in 7 Posts	Re: Quick Fuel 780 SSR carb I never knew a 3310-2 was a 780 c.f.m with a secondary rear metering block. I thought any thing after 3310-1 was a 750 c.f.m with a plate. I will keep a eye on the -2 next time at a swap meet.

03-26-2011, 10:33 AM	#7
Dwight Southerland VIP Member Join Date: Dec 2001 Location: Arkansas - In the middle of everything. Posts: 2,002 Likes: 64 Liked 783 Times in 195 Posts	Re: Quick Fuel 780 SSR carb Adger - You are basically right. The change to the plate and straight boosters was part of the production definition of the -3 and later carbs. I have seen a -2 carb with straight boosters and a block though. Then there is the original "3878261-EH LIST-3310" carb that was the start of it all . . . .

03-26-2011, 11:57 AM	#8
Bill Harris Member Join Date: Mar 2002 Location: Ooltewah, TN Posts: 421 Likes: 13 Liked 26 Times in 13 Posts	Re: Quick Fuel 780 SSR carb I thought that carb was legal only in SS. Is it a legal replacement for a 780 in stock? __________________ Bill Harris ex 2172 STK ex 2272 S/S

03-27-2011, 10:55 AM	#9
Kirk Morgan Member Join Date: Jan 2009 Posts: 230 Likes: 1 Liked 81 Times in 45 Posts	Re: Quick Fuel 780 SSR carb Were you running the carb with or without a power valve.

03-27-2011, 01:32 PM	#10
Adger Smith VIP Member Join Date: Dec 2001 Location: Texarkana Ark/TX Posts: 2,446 Likes: 575 Liked 880 Times in 311 Posts	Re: Quick Fuel 780 SSR carb Kirk, The new David Cook (DC Carbs) 3310-1 carb I'm trying out has a PV in the front and blocked in the rear. It is not the .025 over bore version and had a nice fuel curve. Of course the jetting is not square F to B , but the fuel flow- A/F ratios look good. Up to now I've always run a std bore # 4779 750 by Da Vinvci. I'm not a big fan of PV's but this is the way he sent it and I'm going to try it that way. It does stay clean when idling and at low RPM. __________________ Adger Smith (Former SS)

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