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Old 05-21-2005, 01:11 AM
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Carb spacer question

I have a Wieand 8004 dual plane intake on a small block Chevy. I'm going to be putting an Edelbrock #1406 carb on it, with a 1" four hole spacer between the two. I know the diameter of the Holley ports are slightly larger than that of an Edelbrock. My question is, would it hurt to use a four hole spacer designed for Holley, under an Edelbrock carb? My thinking is that you would use an Edelbrock gasket directly under the carb, and a Holley gasket under the spacer. (Edelbrock - 1.467" / Holley - 1.75") Or should I stick with a spacer that that has the 1.467" diameter holes to match the carb? Thanks.

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Old 05-21-2005, 01:15 AM
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Match the carb...or else run open design if your intake is open. If not match it correctly. If you already have it and can't return it possible machine it out a little but make sure the holes line up.
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Old 05-21-2005, 01:53 AM
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intake

I am not familiar with your model of intake. Edelbrock performer RPM has a divided plenum but the Airgap/RPM has the plenum cut down about a 1/2". This allows the Airgap to take advantage of the divided plenum and Single plane designs. If I was going to put a spacer in, I would opt for an open spacer to take advantage of the Single plane design as well as the divided plane you are using.
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Old 05-21-2005, 08:02 AM
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Gametech,

I would recommend trying to find a 4 hole spacer that matches the bore pattern of the Edelbrock carb.

I bought a Holley spacer for mine and didn't like the way the bores on the holley spacer were so I made my own on a CNC Mill.

It just doesn't make any sense to me to put a 4 Hole spacer in between when the Holley pattern is larger especially on the primary's.

If I happen across one I will let you know.

Tmod
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Old 05-21-2005, 02:44 PM
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Ok, I'll stick with the Edelbrock diameter when I buy one. My original thoughts were, "Since the Holley spacer had a slighty larger diameter, there wouldn't be a restriction... as compared to if I was trying to go the other way around." (Holley carb on top of an Edelbrock designed spacer) Thanks for steering me in the right direction. I remember Pep Boys had a Phenolic 4 hole spacer (1"), will try to stop by there tomorrow and check it out.
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Old 05-21-2005, 10:04 PM
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sorry I was confused. I thought you were putting smaller bores under a larger bored carb, not vice versa. It should work fine assuming it lines up symmetrically.
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