Which type of carburetor?

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dart_68

dart_68

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I just bought a used Eddy Performer manifold for my 360. The carb mounting flange is for a spread bore carb. My question is should I put a spread bore carb on it or a square bore carb with an adapter? Also, do I need, or should I, enlarge the runners to 360 size? I'm assuming that since it fits all LA engines that the runners are 318 sized.

Thanks.
 
either or, what carb do you have? I would say that if that's a performer manifold it has the bigger ports, the older manifolds were more specific to a 318. I'm sure others will post up that know this for sure.
higgs
 
hollywood hig said:
either or, what carb do you have? I would say that if that's a performer manifold it has the bigger ports, the older manifolds were more specific to a 318. I'm sure others will post up that know this for sure.
higgs
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The engine I found didn't come with a carb but it did have a stock 4 bbl manifold.
 
If I was committed to use that intake, then I would buy a 650 CFM spread bore Holley Carb.
 
It will work fine, 600 Holley or eddy will be fine.
Options for that intake are gasket matching ports, but the heads ports aren't gasket matched...so you would need to stay a little smaller than the gasket, you might find that tricky, you might not. I'd stay a good .060 smaller than the gasket of I did that.
Not really a "have to" thing.
If you go eddy 600... try the heavy grey step up springs and the 70/37 rods, they tend to be lean ootb.
 
If running a spread bore go with the thermoquad, had nothing but problems with the holley spreadbore.
 
The edelbrock performer does have the smaller 318 ports. Some people open them up to 360 size if using it on a 360, but on a mild, low compression stock-ish build, I doubt you'd ever notice a difference.

For a carb, I'm a holley guy. I'd probably just toss a cheapie 1850 on it and call it good. I ran one on a mild 408 for years.
 
I've run the Holley 1850 and the Edelbrock Performer carb on top of mild builds. There about equal really.

Just run the intake and what ever carb you want. The Edelbrock Performer intake is equal to a stock intake.
 
If you want a bolt it on and go Carb, then Carter/Edelbrock, is the ticket. If you want a Carb that can be tuned to perform to its maximum potential, then Holley fits that bill. IMO. :thumbsup:
 
I'd open up the ports to 360 size, suppose to give 20hp. They have to use them on late models up here. If you don't open them to 360 size they find the stock 2 bbl intake faster And I imagine the stock 4 bbl is better than the stock 2 bbl intake.
(They have to run a 500 cfm Holley 2bbl)
 
Hmm seems like no one here has used one... You don't need an adapter to run a square-bore carb on an Eddy Performer manifold, it has a dual-pattern flange that can accept either square or spread-bore carbs. I've used both myself, just use the proper gasket for whichever type of carb you are running.

Had one on a 318 once, first ran a ThermoQuad then switched to a Carter AFB and both bolted right on, no adapters required.
 
x2 the ede performer intake will accept spread and square bore carbs. You only have to look for a good base gasket.

BTW the runners are o.k for a 318cui....340 intake ports are bigger ... 360 ? not sure
 
if the Holley 1850 and the Edelbrock performer were about equal, Id use the Edelbrock every time. No gaskets to dry out, PV to pop, and accelerator pump to fail.
 
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