• I had a go with this, and in theory my 1598cc 16v with 280 cams needs ~38cm.

    I recon with my man maths and not being near the car to physically measure I got to ~36cm as a guesstimate

  • Yeah the two values it spits out are confusing - I couldn’t work out why it gives you one value and then a second one which is half. I might try and decider the original formula

  • Might be to do with resonant frequencies, where one has the first harmonic of the other.

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