Posted by XE-Ryder on 1/31/2006, 7:28 am, in reply to "intake" Dual plane manifolds give the car two separate passages for the air/fuel mix to travel. One is optimized for slower air flow which occurs at idle and off idle running. The other is optimized for wide open high speed air flow when passing cars, beating chevys, fords, etc. This type manifodl is best for a trouble free daily driver. It helps your car drive well in all situations. Single plane manifolds have a single set of larger passages to go right to the intake valve port of your heads. They can offer lots of added top end power when you floor it, but be advised: If the rest of your engine is not built around this type of running the airflow in these passages can become completely messed up for about 1 second when you floor it. During this time the car stumbles or falls on its face until the flow stabilizes, and then the engine sort of "catches up" and really takes off. This is caused by the airflow at the bottom of the carb venturies losing speed when you open them all up. Now if you have a reasonable cam, some decent base timing, free flow exhaust system, and a good double pumper carb (not to big, I run an 825 cfm Race Demon and that is big as you should need for a small block) you are going to be pretty close. Now here is the trick to "faking out" your carb to think it is still on a dual plane manifold: Run a 1 inch tall four hole carb spacer on a open plenum single plane manifold. This configuration is like having your cake and eating it too! When I stand on my go pedal, my car goes from idle to "rocket" instantly! Instead of thinking about this one part (the intake), think about your combination. Always think combination, and what you want to achieve in your car. This will insure all the players are on the same team and running for the same goal line. Hope this helped, Have fun! XE
4.38.52.22
A single plane intake is all about top end power....
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