The Ford Barn

Recycle1947 · 10-04-2019, 12:28 AM

I have a 49 8ba bored .100 over and 3/4 cam and Offy heads to put in a '30 A coupe. I want to run 2x2 carbs on it. I can get an Offy 3x2 manifold for reasonable money. Will the motor have good performance with the center carb spot blocked off and just running the outer carbs which will sit over the intake ports like the Offy 7106? Or should I keep looking?

RalphM · 10-04-2019, 01:01 AM

2x2 manifolds are designed for two carbs, and are not expensive or hard to find. I’d keep looking.

RalphM · 10-04-2019, 01:02 AM

2x2 manifolds are designed for two carbs, and are not expensive or hard to find. I’d keep looking.

Tinker · 10-04-2019, 02:33 AM

Probably okay. There also voids from the block off. Not bad, but could be better.

Ol' Ron · 10-04-2019, 09:16 AM

Not a problem, on a street engine. But no matter which intake you use, you'll have to change the distributor. Also milling the heads for .045/.050 piston to head clearance will improve throttle response an mileage. Well worth the cost.

JSeery · 10-04-2019, 01:22 PM

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Fairly common to block the two outside carbs or the center carb. Wouldn't think it would make much difference at low rpms.

10-04-2019, 12:28 AM	#1
Recycle1947 Junior Member Join Date: Aug 2016 Location: Lake City, FL Posts: 1	Running 2 carbs on a 3x2 manifold I have a 49 8ba bored .100 over and 3/4 cam and Offy heads to put in a '30 A coupe. I want to run 2x2 carbs on it. I can get an Offy 3x2 manifold for reasonable money. Will the motor have good performance with the center carb spot blocked off and just running the outer carbs which will sit over the intake ports like the Offy 7106? Or should I keep looking?

10-04-2019, 01:01 AM	#2
RalphM Senior Member Join Date: Nov 2015 Location: North Pole, Alaska Posts: 2,651	Re: Running 2 carbs on a 3x2 manifold 2x2 manifolds are designed for two carbs, and are not expensive or hard to find. I’d keep looking.

10-04-2019, 01:02 AM	#3
RalphM Senior Member Join Date: Nov 2015 Location: North Pole, Alaska Posts: 2,651	Re: Running 2 carbs on a 3x2 manifold 2x2 manifolds are designed for two carbs, and are not expensive or hard to find. I’d keep looking.

10-04-2019, 02:33 AM	#4
Tinker Senior Member Join Date: May 2010 Location: MN Posts: 7,053	Re: Running 2 carbs on a 3x2 manifold Probably okay. There also voids from the block off. Not bad, but could be better.

10-04-2019, 09:16 AM	#5
Ol' Ron Senior Member Join Date: May 2010 Location: Chester Vt Posts: 8,857	Re: Running 2 carbs on a 3x2 manifold Not a problem, on a street engine. But no matter which intake you use, you'll have to change the distributor. Also milling the heads for .045/.050 piston to head clearance will improve throttle response an mileage. Well worth the cost.

10-04-2019, 01:22 PM	#6
JSeery Member Emeritus Join Date: Nov 2012 Location: Wichita KS Posts: 16,132	Re: Running 2 carbs on a 3x2 manifold Sponsored Links (Register now to hide all advertisements) Fairly common to block the two outside carbs or the center carb. Wouldn't think it would make much difference at low rpms.