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Everyone, I do all my own porting and port everything. Every GM LS/LT head, intake, TB, blower. I port all of the aftermarket heads, intakes, TB's and blowers as well. Everything is flow tested on my bench and then dynoed if at all possible.
For the LT intakes and TB's I maximize cross section and air quality. I won't say it stays completely laminar cause I haven't checked it. But air quality to the motor is much improved. I widen the runner to 6+" back to as close to the opening dimensions I can, I raise the roof and lower the floor as well. I smooth out all of the transition areas "bends" to ensure uniformity and contour. I heavily work the "short turn" of this intake. I widen and smooth it as well. I try to direct the air to where the head needs it. Inside the intake inlet, behind the TB I do a lot of contouring and shaping to ensure the greatest draw that can be placed on the TB is. Remember that N/A motors are a vacuum and you have to think backwards from the valve up. What is going to create the most draw on the TB is what you are looking for. On the TB it is more of the same, contouring and shaping. I also cut the blade shaft down to about 3-4mm to ensure it isn't an obstruction or creates turbulence. I hope this helps.
Blade, look up. The dyno graphs are in my original post, the explanation of the graphs is below it. Come on up any time brother. It would be great to meet you.
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