gbodybilly
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Jul 11, 2011
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Pardon my ignorance (I am ignorant so just pardon it, please), but is there anybody that converted a dual plane intake? I mean, given the purpose of the single plane vs. the dual plane, why haven't many people done this? Is it the lack of material on the intakes? The angle of the injectors? Or is it just not worth it?
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Using a dual plane has been done. The real benefits of a dual plane manifold are somewhat negated by going to a port injection. Since the dual plane is normally to provide a divided plenum, to help improve vaccuum signal at a carb, there is no need since there is no carb. The reason for this is throttle response. The other advantage is that half the runners are shorter, to provide a wider torque curve. With EFI, you can pretty much get there with tuning for both of those points.
the reason you don't see more dual planes is that its simply more difficult to make injector bungs, and more importantly, fuel rails, due to changes in entry angle due to construction of the ports.
for certain engines, its the only option when using a casting(other than sheetmetal intakes, $$$$), so you will see some engines have a dual plane converted, but for the most part, if there is a single plane manifold available, that will get used, especially since most conversions are for higher HP engines, which need the better flow of the single plane intakes. It just becomes more simple and cost effective all around.
the reason you don't see more dual planes is that its simply more difficult to make injector bungs, and more importantly, fuel rails, due to changes in entry angle due to construction of the ports.
for certain engines, its the only option when using a casting(other than sheetmetal intakes, $$$$), so you will see some engines have a dual plane converted, but for the most part, if there is a single plane manifold available, that will get used, especially since most conversions are for higher HP engines, which need the better flow of the single plane intakes. It just becomes more simple and cost effective all around.
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The_Raven
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Mar 16, 2006
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Quote:
Originally posted by jwscab
Using a dual plane has been done. The real benefits of a dual plane manifold are somewhat negated by going to a port injection. Since the dual plane is normally to provide a divided plenum, to help improve vaccuum signal at a carb, there is no need since there is no carb. The reason for this is throttle response. The other advantage is that half the runners are shorter, to provide a wider torque curve. With EFI, you can pretty much get there with tuning for both of those points.
the reason you don't see more dual planes is that its simply more difficult to make injector bungs, and more importantly, fuel rails, due to changes in entry angle due to construction of the ports.
for certain engines, its the only option when using a casting(other than sheetmetal intakes, $$$$), so you will see some engines have a dual plane converted, but for the most part, if there is a single plane manifold available, that will get used, especially since most conversions are for higher HP engines, which need the better flow of the single plane intakes. It just becomes more simple and cost effective all around.
Couldn't have said it any better.Originally posted by jwscab
Using a dual plane has been done. The real benefits of a dual plane manifold are somewhat negated by going to a port injection. Since the dual plane is normally to provide a divided plenum, to help improve vaccuum signal at a carb, there is no need since there is no carb. The reason for this is throttle response. The other advantage is that half the runners are shorter, to provide a wider torque curve. With EFI, you can pretty much get there with tuning for both of those points.
the reason you don't see more dual planes is that its simply more difficult to make injector bungs, and more importantly, fuel rails, due to changes in entry angle due to construction of the ports.
for certain engines, its the only option when using a casting(other than sheetmetal intakes, $$$$), so you will see some engines have a dual plane converted, but for the most part, if there is a single plane manifold available, that will get used, especially since most conversions are for higher HP engines, which need the better flow of the single plane intakes. It just becomes more simple and cost effective all around.