What effect does varying the length of the inlet manifold have on engine performance? And is there a way of working out the optimum dimensions.

I ask because I got to 'design' a custom manifold that will allow me to mate a set of gsx600 throttle bodies to a zetec engine.

thanks

Tony

this SAE paper explains how Mazda developed a variable length induction system for their V6

http://rs-productions.com/RSP_Motors/tech/sae-920677/sae-920677.htm

Thanks Bryan, I'll have a read