Spacer Plate
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Tuned
Joined: Feb 2013
Posts: 258
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From: Peterstown
Spacer Plate
I have a Holley 4bbl 650 on an Edelbrock aluminum intake on my 351M. What will a 1 inch spacer plate do for my engine? What are the pros and cons to having it. And if I am after better fuel mileage, would I be better off without it?
Cargo Master
Joined: Apr 2010
Posts: 2,600
Likes: 64
From: Billings, MT
I like to think it helps out the shorter runners on the intake. I'd do a two hole spacer that matches the shape of the intake opening. I did on my old truck with a 400 and the same intake. Seemed to help the power out slightly, and leaned out the middle short runner cylinders a little, bringing them closer to the outer cylinders.
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Tuned
Joined: Feb 2013
Posts: 258
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From: Peterstown
I am a mechanic by trade, but I have been out of the profession for about 12 years, since I got my disability from the military. I am not sure what you mean by, "increase plenum volume", and "increase low-end torque".
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