Originally posted by terry haines:...the pics he posted are of a Porsche 'proto' 2.5 V6....and where did everyone get them?....they are ALL mine as I have all the info on that engine.FWIW gas velocity,plenum volume etc are far more important on a multi-vale.A log intake will do little to improve power.I'd suggest some of the masses look at current and recent Formula 1 engine designs,also as a 3.0 and later Duratecs do not have secondries but don't fall flat at low RPM's....the Zetec has never had secondries and is a 4 valve head etc....lets hope they can work out 'why'...LOL...TH
