Does anybody know the average intake runner length from the intake valve seat to the beginning of intake port on the head?
17.44"
I just realized I honked up the math, it's actually 17.25".
Also, the .06 is a variable so it is accurate to use 12.5" for manifold runner length and 4.75" for cylinder head runner length. All figures are derived by taking the long side + short side and dividing by two.