[vector1]

here is an example of tuned length runners from a pipemax program just to give an idea of the differences in runner lengths used. this is off a 9.5 deck windsor with mild solid roller cam and afr205's. the plenum would fit on top of the runners.

- Induction System Tuned Lengths - ( Cylinder Head Port + Manifold Runner )
1st Harmonic= 32.201 (usually this Length is never used)
2nd Harmonic= 18.276 (some Sprint Engines and Factory OEM's w/Injectors)
3rd Harmonic= 12.759 (ProStock or Comp SheetMetal Intake)
4th Harmonic= 10.042 (Single-plane Intakes , less Torque)
5th Harmonic= 8.148 (Torque is reduced, even though Tuned Length)
6th Harmonic= 6.855 (Torque is reduced, even though Tuned Length)
7th Harmonic= 5.916 (Torque is greatly reduced, even though Tuned Length)
8th Harmonic= 5.204 (Torque is greatly reduced, even though Tuned Length)
Note> 2nd and 3rd Harmonics typically create the most Peak Torque
4th Harmonic is used to package Induction System underneath Hood