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Old 03-27-2004, 09:53 PM
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Turning manifold from dual plane to single plane

Hello,

I just put a new cam in my motor and now I want to sell it so I can build a 406. Its a 350 bored .030 right now. I sold my performer manifold awhile back and all I have now is a stock manifold. In my chevy hi performance book I saw a stock manifold that had been turned from a dual plane to single plane because of regulations. I don't want to spend money on a new manifold but I want to show a potential buyer the top end that it has. I don't think I can do that with a completely stock manifold. My cam is a lunati 292 with .480 lift. Is this work doing or not? What is the rpm limit on completly stock manifolds? What would my rpm limit be if I did this. I use 1 inch spacer too.

Thanks

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Old 03-27-2004, 09:55 PM
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If you are using a 1 inch open spacer, you are basicly turning your manifold into a single plain....well, sort of. You get a similar effect.
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Old 03-27-2004, 10:08 PM
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With a stock dual plane and a 1 inch spacer, could i rev to about 6100 without loosing power becuase of the manifold?

Thanks
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Old 03-27-2004, 10:24 PM
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Do you want to cut out the holes/ports? this I would like to see done.

Hey I have a old iron intake. So what would be a good tool to cut the ports out with?
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