Compare Stock Ports to Various Combinations of “Undercover Porting”
How we gathered the flow numbers in this catalog:
The flow numbers are gathered from dozens of tests on each particular head. After we have a wide cross section of tests, the flow figures are averaged to achieve a fair baseline. True, some ports may, on a particular casting, flow 2 to 4 percent more than our average base line. However, the next port (or the next head) may be down more than 4 percent. This is especially true with stock cast iron castings. Also, the head’s flow numbers may change over years, due to changes in production. All of our flow testing is performed at 28” of water with a SuperFlow 600 flow bench, Flow Pro software from Audi Technology and the flow bench equipment displayed in this catalog. |
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