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Old 04-22-2010, 07:23 AM
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name that intake flange!

I bought this a long while back and it doesn't seem to be made by world products anymore. I'm not sure of the carb flange, therefore I can't buy the correct carb to fit on this thing.

http://www.flickr.com/photos/49532165@N07/?saved=1

any help is appreciated.

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Old 04-22-2010, 07:40 AM
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The flange will (should?) fit a "square bore" carb. But it does look kocked, one side narrower pattern than the other? Can you confirm? I don't know if it's an optical illusion or what.
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Old 04-22-2010, 07:49 AM
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A little brighter and larger:

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Old 04-22-2010, 08:01 AM
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I think it's probably just an optical illusion. I snapped a quick photo before I ran out to work today using my phone, so I apologize for the crummy quality.

I think I understand the difference between spread bore and square bore...but what about when they say "Holley 4150" or "Holley Dominator"?

Like if you look here, http://www.worldcastings.com/product...ock-chevrolet/
They have them listed by 4150 flange or 4500 flange...


I wish I could find a thing online that actually showed the different types of intake patterns.
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Old 04-22-2010, 08:17 AM
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A Q-jet intake is easy to ID, they have large secondaries and, on an intake made to fit either a Q-jet or a square flange carb, there will be two sets of holes, the inner set is for the Q-jet, outer for the square flange, obviously.

A Dominator is HUGE, there's no mistaking it. A Dominator square bore flange is shown below a square bore flanged manifold like you have:


Last edited by cobalt327; 04-22-2010 at 08:22 AM.
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Old 04-22-2010, 08:39 AM
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At the end of the day is there a difference between the 4150 and 4500 flange as World Products is stating? Sometimes I feel like all I eat is retarded sandwiches and then I take stupid pills between meals.
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Old 04-22-2010, 09:21 AM
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Quote:
Originally Posted by unstable
...is there a difference between the 4150 and 4500 flange...?
Yes- the square bore Holley (and others) is 5-3/16" side to side, 5-5/8" front to rear. The Dominator is something like 5-3/8" square, to accommodate wider throttle bore centers. Not to mention the huge size difference between the two, plenum opening-wise.

The Q-jet's spreadbore flange is 4-1/4" side to side, 5-5/8" front to rear.

All measurements are "give or take" (I just quickly measured the square bore and Q-jet flange w/a tape out in the shop, the Dominator figure is from the 'net).

Last edited by cobalt327; 04-22-2010 at 09:32 AM. Reason: Correction.
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Old 04-22-2010, 03:25 PM
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What you have is 4150 flange Holley, also known as "square flange".
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Old 04-22-2010, 07:38 PM
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what would the Edelbrock performer non EGR manifold pattern be? Spread bore? Can I use my 4160 directly on it?
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Old 04-22-2010, 07:56 PM
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Quote:
Originally Posted by southshore30
what would the Edelbrock performer non EGR manifold pattern be?
It has both spread and square bore patterns.
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Old 04-22-2010, 08:26 PM
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4150 and 4160 Holley have the same manifold bolt pattern, it is 4500 that is different. In Holley-speak 4150 denotes metering blocks on both the front and rear of the carb, 4160 means metering block on the front and metering plate in the rear.
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Old 04-22-2010, 11:42 PM
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A spreadbore intake (like Qjet or a Spreadbore Holley) looks like this:



Or this:





A squarebore intake (like Holley 4150, Edelbrock, Carter) looks like this:



Or this:

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Old 04-23-2010, 03:49 PM
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yea, thats the manifold I have. There was no option on carb flanges when buying that manifod. Are all Edelbrock carbs spread bore to fit that manifold or is that a necessity to its design for the RPM range its designed for? I do have a 600 holley that is all apart right now. I did get a spread bore adapter plate as well, Looks like I need to use it!
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Old 04-23-2010, 06:37 PM
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Quote:
Originally Posted by southshore30
yea, thats the manifold I have. There was no option on carb flanges when buying that manifod. Are all Edelbrock carbs spread bore to fit that manifold or is that a necessity to its design for the RPM range its designed for? I do have a 600 holley that is all apart right now. I did get a spread bore adapter plate as well, Looks like I need to use it!
The Edelbrock 2101 intake has a spread bore AND a square bore flange.

The Edelbrock Performer and Thunder AVS carbs both have square bore flanges- either of them will fit the 2101 intake by using the existing outer bolt holes and a thin plate like Edelbrock #2732 or an insulator-type thick gasket so there's no leakage where the plenum flares out for the spread bore secondaries.

If you use the #2732, you need to check and fix any interference between the spacer and the carb.

The adapter you mention will work as well, but isn't a necessity. If the adapter you're using is an open design, it will inhibit the dual plane design of the intake to some extent because you will be connecting both sides of the intake via the spacer/adapter.
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Old 04-23-2010, 09:42 PM
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nice! thanks cobalt. that is good news. I will ditch the adaptor plate and order a spacer plate instead. Glad to have this cleared up
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