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It's been a while but I clearly remember that when I went from the common dual plane intakes (stock & Holley) to a single plane (Weiand 7525) on my TBI it was a tremendous improvement. None of that single plane low end loss that you hear about when using carbs because of the TBI. I would highly recommend a low rise type single plane over any dual plane for a TBI specifically if your doing your own programming.
Brian
Ive been running a dual plane for years-way better than the stock manifold. When I rebuilt my 350 into a 383 I used the same manifold with a 7.4 throttle body-and scored the adapter/plenum with it. Now each of my throttle bores can feed either side of my manifold.
Not to muddy the water here but would a spacer plate under the throttle body do any good. (Over the whole range or low down)
Or this an old carb trick that has no place with TBI?
Ken
Ken, a spacer under the TBI unit is also slightly beneficial. This is where it IS similar to carburetors. It lenghtens the path for the air/fuel mixture. An open spacer, open between the two TBI bores, evens out the mixture as well. Same benefits as spacers under carbs. Now multi-port FI thtottle body spacers are worthless.
Not to muddy the water here but would a spacer plate under the throttle body do any good. (Over the whole range or low down)
Or this an old carb trick that has no place with TBI?
Ken