On Wednesday, June 29, 2005, at 09:23 AM, Russell Duffy wrote:

I don't understand why you think the velocity is guaranteed to be higher in the PP runner?  That all depends on the size of the runners, and ports.  You can't just make a blanket statement like that. 

Not being an engineer I am used to my own stupid mistakes. The reasoning behind the statement come mainly from two considerations: first the p ports breath a lot better than any side port configuration thus more air is flowing through them; secondly, there are only two runners instead of four so naturally the speed will have to be double assuming the same size runners. If in the case of side port, the intake runner i.d.s are reduced, the skin friction will be greatly increased. Face it, side ports are a drag. There is no way velocities in a four runner intake can ever approach those of a two runner p port. IMHO, Jerry