|
Re: Progressive or 1:1 on Dual Quads?
[Re: Mopar_Mudder]
#1319945
10/14/12 01:11 PM
10/14/12 01:11 PM
|
Joined: Jan 2003
Posts: 75,015
U.S.S.A.
JohnRR
I Win
|
I Win
Joined: Jan 2003
Posts: 75,015
U.S.S.A.
|
Quote:
Thanks for all the replys. One less thing to worry about, I will leave it 1:1 and see how it runs, easy enough to change in the future.
What intake are you using , that will determine which way you can or want to run ?
|
|
|
Re: Progressive or 1:1 on Dual Quads?
[Re: modelmakerinc]
#1319946
10/14/12 02:20 PM
10/14/12 02:20 PM
|
Joined: Mar 2010
Posts: 1,880
Out in Left Field, NY
bobs66440
top fuel
|
top fuel
Joined: Mar 2010
Posts: 1,880
Out in Left Field, NY
|
Quote:
Can someone please expand on the terminology (1:1 & progressive) for those whose might be curious. Thanks
1:1 means that both carbs' throttles are opened the same amount at the same time via a linkage connecting the two. Progressive means the the primary (rear) carburetor is opened first and the secondary one opens sometime after it via a progressive linkage connecting the two. They usually are set up to both hit full throttle at the same time...
|
|
|
Re: Progressive or 1:1 on Dual Quads?
[Re: Mopar_Mudder]
#1319948
10/14/12 11:15 PM
10/14/12 11:15 PM
|
Joined: Jan 2003
Posts: 75,015
U.S.S.A.
JohnRR
I Win
|
I Win
Joined: Jan 2003
Posts: 75,015
U.S.S.A.
|
Quote:
It is the repop of the stock Hemi intake, orignal carb spacing dual plane.
You can run progressive with that intake if you choose since it's a dual plane.
|
|
|
Re: Progressive or 1:1 on Dual Quads?
[Re: JohnRR]
#1319949
10/14/12 11:18 PM
10/14/12 11:18 PM
|
Joined: Jan 2003
Posts: 9,436
Blair County,PA
62maxwgn
master
|
master
Joined: Jan 2003
Posts: 9,436
Blair County,PA
|
Quote:
Quote:
It is the repop of the stock Hemi intake, orignal carb spacing dual plane.
You can run progressive with that intake if you choose since it's a dual plane.
And you can save a few bucks on fuel ! 
|
|
|
Re: Progressive or 1:1 on Dual Quads?
[Re: quickd100]
#1319950
10/15/12 06:53 AM
10/15/12 06:53 AM
|
Joined: Jan 2003
Posts: 5,903
Athens, Greece
Pyper70
master
|
master
Joined: Jan 2003
Posts: 5,903
Athens, Greece
|
Question for the secondary carb running progressive....should I back the idle circuit all the way out since the engine is running with only the rear one? Should I treat the Two carbs like a double pump Holley and adjust it like 4 corner air bleed screws. Should the rear carb be more lean than the front one? Should they be equal?
Family owned 1969 Charger R/T DualQuad 440/727/GVO/3.55s
|
|
|
Re: Progressive or 1:1 on Dual Quads?
[Re: JohnRR]
#1319951
10/15/12 09:23 AM
10/15/12 09:23 AM
|
Joined: Mar 2010
Posts: 1,880
Out in Left Field, NY
bobs66440
top fuel
|
top fuel
Joined: Mar 2010
Posts: 1,880
Out in Left Field, NY
|
Quote:
You can run progressive with that intake if you choose since it's a dual plane.
I didn't realize it made a difference, running dual/single plane with progressive/1:1 linkage. I switched mine (single plane Offy) from progressive to 1:1 yesterday and it is WAY better. Why does it matter?
|
|
|
Re: Progressive or 1:1 on Dual Quads?
[Re: bobs66440]
#1319952
10/15/12 10:24 AM
10/15/12 10:24 AM
|
Joined: Jan 2003
Posts: 75,015
U.S.S.A.
JohnRR
I Win
|
I Win
Joined: Jan 2003
Posts: 75,015
U.S.S.A.
|
Quote:
Quote:
You can run progressive with that intake if you choose since it's a dual plane.
I didn't realize it made a difference, running dual/single plane with progressive/1:1 linkage. I switched mine (single plane Offy) from progressive to 1:1 yesterday and it is WAY better. Why does it matter?
I would have to see your intake but since the OP has a Hemi there are a few different intakes, if he had a Stage 5 intake he would definitely have to run it 1:1 because it is basically 2 single plane intakes with a small passage that wouldn't feed the opposing 4 cylinders very well, if at all .
|
|
|
Re: Progressive or 1:1 on Dual Quads?
[Re: JohnRR]
#1319953
10/16/12 06:35 AM
10/16/12 06:35 AM
|
Joined: Mar 2010
Posts: 1,880
Out in Left Field, NY
bobs66440
top fuel
|
top fuel
Joined: Mar 2010
Posts: 1,880
Out in Left Field, NY
|
Quote:
Quote:
Quote:
You can run progressive with that intake if you choose since it's a dual plane.
I didn't realize it made a difference, running dual/single plane with progressive/1:1 linkage. I switched mine (single plane Offy) from progressive to 1:1 yesterday and it is WAY better. Why does it matter?
I would have to see your intake but since the OP has a Hemi there are a few different intakes, if he had a Stage 5 intake he would definitely have to run it 1:1 because it is basically 2 single plane intakes with a small passage that wouldn't feed the opposing 4 cylinders very well, if at all .
It's the same as this one.
http://www.ebay.com/itm/Offenhauser-5206-Dual-Quad-Low-Rise-Intake-Manifold-/310383386977
|
|
|
Re: Progressive or 1:1 on Dual Quads?
[Re: bobs66440]
#1319955
10/16/12 11:33 AM
10/16/12 11:33 AM
|
Joined: Jan 2003
Posts: 75,015
U.S.S.A.
JohnRR
I Win
|
I Win
Joined: Jan 2003
Posts: 75,015
U.S.S.A.
|
Quote:
Quote:
Quote:
Quote:
You can run progressive with that intake if you choose since it's a dual plane.
I didn't realize it made a difference, running dual/single plane with progressive/1:1 linkage. I switched mine (single plane Offy) from progressive to 1:1 yesterday and it is WAY better. Why does it matter?
I would have to see your intake but since the OP has a Hemi there are a few different intakes, if he had a Stage 5 intake he would definitely have to run it 1:1 because it is basically 2 single plane intakes with a small passage that wouldn't feed the opposing 4 cylinders very well, if at all .
It's the same as this one.
http://www.ebay.com/itm/Offenhauser-5206-Dual-Quad-Low-Rise-Intake-Manifold-/310383386977
Bob , on that intake 1:1 would be the better choice for performance because of carb to port layout , running off just one at first would cause the 4 cylinders at the opposite end to not see a decent fuel/air mixture.
You could switch to a smaller set of carbs if you wanted , throttle response would probably improve.
|
|
|
Re: Progressive or 1:1 on Dual Quads?
[Re: JohnRR]
#1319956
10/16/12 12:19 PM
10/16/12 12:19 PM
|
Joined: Mar 2010
Posts: 1,880
Out in Left Field, NY
bobs66440
top fuel
|
top fuel
Joined: Mar 2010
Posts: 1,880
Out in Left Field, NY
|
Quote:
Quote:
Quote:
Quote:
Quote:
You can run progressive with that intake if you choose since it's a dual plane.
I didn't realize it made a difference, running dual/single plane with progressive/1:1 linkage. I switched mine (single plane Offy) from progressive to 1:1 yesterday and it is WAY better. Why does it matter?
I would have to see your intake but since the OP has a Hemi there are a few different intakes, if he had a Stage 5 intake he would definitely have to run it 1:1 because it is basically 2 single plane intakes with a small passage that wouldn't feed the opposing 4 cylinders very well, if at all .
It's the same as this one.
http://www.ebay.com/itm/Offenhauser-5206-Dual-Quad-Low-Rise-Intake-Manifold-/310383386977
Bob , on that intake 1:1 would be the better choice for performance because of carb to port layout , running off just one at first would cause the 4 cylinders at the opposite end to not see a decent fuel/air mixture.
You could switch to a smaller set of carbs if you wanted , throttle response would probably improve.
Ok, thanks 
|
|
|
|
|
