Thread: Exhaust Mani Advice

I need some advice on building an exhaust manifolds.I will like to know how can I figure out what length and diameter piping to use on my setup.I know that on a allmotor setup it really matters what diameter and what length but when I read on turbo exhaust manifolds there is not as much information out there.

Edit:I need to determine specs for a trubo sr20vet N1 cam setup.All I find is info on allmotor headers and I already have that packed down thanks to the sr20 forums but on turbo manifolds there is no discussions about them.I'll be making mines but before I buy materials I want to know how to determine specs or atleast have someone chime in with some good info.

i guess see which ones are rated and copy that

determine where and how you want to make power

there are many books to help you determine length, diameter, step and timing

there's some interesting info in here Racing Headers | Stock Car Racing Magazine Article at Automotive.com

Its for a turbo setup.I know how to determine specs for an allmotor but on a turbo setup I havvnt found any usefull information.Could you let me know where can I find some info on how to determine specs for a turbo mani?