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Dual Quad guys....... please step forward !

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Old Mar 26, 2008 | 09:48 PM
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Default Dual Quad guys....... please step forward !

Okay guys................ need some help on my dual quad set-up for the '76 I'm working on !

I've got a couple of (1406) 600 cfm edelbrock carbs that I need to de-jet and reduce to 500 cfm. I need to at least find a starting point for the jets and needles.

I've got the low rise dual quad edelbrock intake manifold atop a 350.

350 bored .030 over
aluminum (small runner) racing heads
Crane energizer 278 cam
200-4R overdrive

Any input will be greatly appreciated........... Thanx guys. Rick
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Old Mar 26, 2008 | 11:14 PM
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CFM is a function of the throttle bore size.

Vac secondary carbs can be made to run
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Old Mar 26, 2008 | 11:53 PM
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Yeah........... I do know that I can't change the size of the cfm.s

I'm just trying to reduce the size of the jets and needles to what the 500 cfm carbs are, so I don't overload the engine. I guess I should have been a little clearer ! Thanx, Rick
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Old Mar 27, 2008 | 12:36 AM
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It doesn't work that way. Carbs are airflow dependent. If they are right on a 454....you can put them on a 283 and be pretty darn close on jetting. The correct jetting will give a good A/F ration for THAT carb regardless of what it's bolted to.

Not to say you can't lean it some if needed..but the jetting for a 500 won't work correctly in the 600 most likely.


JIM
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Old Mar 27, 2008 | 08:20 AM
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Rick,
I did a quick search on the Summit Racing site,looked up an Edelbrock 1404 carb (500cfm) and looked at the "manual.pdf". I think that is what you're looking for.

Post some shots of the CanAm. Been a while since I've seen it.
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