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Old 07-09-2012, 12:35 PM   #1
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Carburetor spacer

Hey. I'm rebuilding a 68 mustang. It's got a 289 in it. I replaced the intake manifold from a 2 barrel to a 4 barrel along with a new carburetor. Just wondering if I need a carb spacer. The original 2 barrel had a 1" spacer. The new manifold is an edelbrock rmp air gap an it's a little higher. Should I not bother with a spacer or should I put one on? What's the benefit of them?
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Old 07-09-2012, 01:30 PM   #2
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I'm not 100% sure but I think it increases low end torque and I also have a 68 289 with an edelbrock intake and carb with a 1" spacer...I hope this helps
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Old 07-09-2012, 05:58 PM   #3
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There are two benefits to a carb spacer; it isolates the carb from the heat of the intake which promotes power increase across the entire RPM range; second the spacer produces a tunnel ram effect which increase higher RPM power.
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Old 07-09-2012, 06:03 PM   #4
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i just bought the " super sucker carb spacer" it says its good for 10-20 hp. i havnt installed it yet. but its specialy designed to aim the air to the runners better. and it is suppose to create more fuel vaccuum to. they say that you will need to reduce jet size.

and 1" is usually for low end. and a 2 " would be more for top end, or racing applications.

also i have read lots of reviews and everyone seems to be happy with it.
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Old 07-09-2012, 07:37 PM   #5
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Spacers are a must on carbureted motors. They do what they advertise.
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