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Dual plain intake mods....

 
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disturbthepeace1
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Joined: 14 Jun 2003
Posts: 303
Location: Stanton, CA
10195.60 points


1965 Volkswagen Beetle

PostPosted: Mon May 07, 2007 12:46 am    Post subject: Dual plain intake mods.... Reply with quote

Im finishing this boat build finnally and the budjet did not allow for a new victor intake manifold.. We will swap one in next season but for now I want to get as much as i can out of the weiand stealth thats on there now.

I plan on running a one inch spacer and a 1/2 inch nitrous plate between the spacer and the carb.

Is there anything to gain by notching the divider out? I havnt even looked at a dual plain in a while but I know that most are not notched while edelbrock's air gap is notched..

I assume this increaces plemum volume....?

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clay
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Joined: 24 Nov 2002
Posts: 3209
Location: South Carolina
318129.23 points


1972 Chevrolet Nova

PostPosted: Mon May 07, 2007 4:43 am    Post subject: Reply with quote

This is my guess. A dual plane intake normally has the carb basically split into halves. Each cylinder bore only "sees" two barrels at a time. This is one reason you can normally run a larger carburetor on a dual plane than a single plane. The single plane allows each cylinder to draw from all 4 barrels. I believe the notch is a step toward letting each cylinder share the entire carburetor and I believe it is only present on dual planes that are trying to stretch the rpm range a dual plane can be effective at - just like the RPM air gap which is effective at lower rpm's due to runner length I assume and the notch can help at higher rpm ranges as does the larger cross section runners on this intake. If your 1" spacer is of the open design, I don't think the notch will gain anything as the open spacer has already served the purpose of letting each cylinder share the entire carb. Clay
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