Engineering Judgement 101: The Sanity Check
I've documented numerous failures of engineering on this site but this is a new one. Many were issues where I substituted engineering judgement for a calculation. In this case, I performed the calculation and had full confidence, but I didn't pass the sniff test! I'll start with an image of shame: The air filter on the left is what I have used since I installed the new engine. The one on the right is what comes with an RX8 cold air intake conversion kit. The left one passes the equation on the K&N website but fails the sniff test. This I did not observe during the engine installation. Another episode of skipping the details to finish the project faster. Not sure how the K&N website works, but it should have been obvious that the left hand filter is for a moped! I wonder if that's because BB's motor is a rotary. The formula is displacement x max rpm divided by a constant. BB's displacement is technically 1.3 liters, although s...
