Quote:
Originally Posted by QB93Z
It seems to me that the X design they have created would be very restrictive. On the inlet side there are two 3" diameter pipes for a total cross sectional area of 28.2 square inches. At the center of the X the pipe would have to be 4.2 inches in diameter (or some oval shape) to have the same cross section area. And there would need to be a smooth transition through the shape changes.
Jim
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I agree, but it may be more than just the actual cross section area to be concerned about. The shape of that area at the center of the X where the four pipe sections meet looks critical to the effectiveness of the X pipe. There may be a lot more involved in tuning those pulses than us bench racers are aware of.