[simicrintz]

I am going to address this to parb since he started this in hopes it won't be a hijack! Did you see any research that addressed bends and restriction? I have to play with water velocities and flow rates with plumbing and I know that bigger pipes (2 12"-3" in my applications flow much more efficiently than 1 1/2") but I also have to be aware of bends. In my case, each 90 equates to ten feet of pipe. I am just wondering if the hard bend (for example) coming off of the exhaust manifold (be it header or stock manifold) creates any concern on the engine or what occurs after that point.

Interesting conversation, with many smarter guys on here than me!