Any info on the standard EFI manifold for 5.8L
I have a 95' 5.8L Roller cam EFI Windsor.
I am using the standard Truck upper and lower manifolds (the twin throttlebody style manifold).
Can anyone tell me how good/bad this manifold is? Is the lower half better than the upper half?
What sort of MAX power will this manifold flow?
Would I have substantial power gains by making a box style upper manifold?