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Edelbrock Performer manifold

Started by _J&S Racing_ , Jul 24 2006 06:14 PM

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6 replies to this topic

#1 _J&S Racing_

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Posted 24 July 2006 - 06:14 PM

I was just trying to remember which one it is, can anybody tell me? Spreadbore comes to mind but i can't trust it these day's.

Also what's the difference in performance terms between the two?

Cheers
Steve

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#2 Litre8

Thrillseeker

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2,399 posts

Name:Howard
Location:Melbourne, Victoria
Car:1976 LX SLR8000
Joined: 05-February 07

Posted 24 July 2006 - 06:33 PM

I seem to recall they are drilled for both. I used to swap between a 650dp spreadbore and a 780 vacuum secondary squarebore on my old 308 that was running an Edelbrock Torker...dont recall using an adaptor.

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#3 _J&S Racing_

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Posted 24 July 2006 - 07:15 PM

Thanks Howard, did you notice any difference with the size of the carbies?

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#4 _1QUICK LJ_

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Posted 24 July 2006 - 07:49 PM

yep they have both patterns drilled, for a mild setup the spread bores work well, if you step up the power say over 300hp @flywheel then thats where the square bore comes in to play.

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#5 _J&S Racing_

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Posted 24 July 2006 - 09:45 PM

Thanks 1QUICK LJ, i have been told to use a squarebore but a 600cfm, i thought it might be to small.

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#6 _1QUICK LJ_

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Posted 25 July 2006 - 09:07 PM

600 cfm works awesome on a worked 308. dont over carb it 600 is plenty for all but the tuffest of 308s.

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#7 Litre8

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Name:Howard
Location:Melbourne, Victoria
Car:1976 LX SLR8000
Joined: 05-February 07

Posted 25 July 2006 - 09:16 PM

Th 650 s/bore was a double pumper so while the small primaries gave great low rpm response the accompanying fuel economy was not one of its strongest attributes. The old 3310/ 780fcm was a nice carb, vacuum secondaries could be tuned via a spring change to give great performance while being more fuel miserly than the double pumper.