Quote:
Originally Posted by CSG Mike
Generally speaking, smaller trumpets = more low end gains, at the cost of high end gains. Likewise, larger trumpets = more high end gains, at the cost of low end gains.
These trumpets are on the smaller end for our displacement, so I would expect to see a healthy midrange boost, that chokes up top.
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Are you sure you don’t have the two reversed?
I know to calculate second and third harmonic pulses you need to account for runner length which is bell mouth to the valve seat. I’m not completely sure about the fa20/boxer motors but Honda and Toyota runners in the head portion were pretty short so to boost mid/low range power you had to run decently long stacks.