SMIM Showdown! Lets figure this out once and for all!

[JET]

Alright, I was holding off on saying anything about this until I saw how the test was going to be performed. I think there are a lot of people that are going to misinterpret this data. The test is NOT representative of the numbers that will be seen inside the engine.

One of the first things many people will notice is that there is no Heimholtz resonance taken in to effect because that can only be seen with the valves opening and closing. In a manifold with a straight back wall, this will not create a difference in flow balance between cylinders, but may change the flow numbers either plus or minus.

Another thing that is a larger issue is that there are no restrictions farther down line in this test (both sets of valves and turbo). This restriction downline from the IM will help to even out the flow of the intake manifold, so you will not see the imbalances to the degree that this test shows. Think of it this way, you have a 5" exhaust with a 1" outlet, will a 6" pipe with a 1" outlet flow any more? No, they will both be limited by the 1" restriction, the restriction is the valves and turbo. The degree of this can't be known unless a running engine is tested at a high flow rate.

I am not saying this test is not useful at all, but people need to be informed to really see what these results mean and I bet the vast majority of the people that will look at these results will not meet that criteria.