Quote:
Originally Posted by Tim Radley
If you measure the intake manifold runners there is over an inch difference in length between shortest and longest. Cylinder 4 is a straight run I one plane but the others are all on a dog leg with cylinder 1 being the worst and longest
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We had our suspicions that the OEM intake manifold doesn't distribute air evenly to each cylinder. Believing that the OEM ECU does not correct for this (which still seems like a viable assumption), we plan to pick up some power by balancing the cylinder distribution some while improving the overall efficiency through reduced flow losses. That was the goal at least.
I have no doubt that you can pick up significant power by optimizing cylinders. There is a great video on youtube detailing how NASCAR does this and they pick up multiple percentages of power. I just didn't think OEMs were to that point yet.