Exhaust manifold bends-how tight is too tight?
 

I am trying to design an equal length manifold for my 20b project. Since the turbo is positioned just ahead of the front exhaust port I will have to really contort the hell out of it to make the length equal to the other runners. I noticed that the City Performance Centre 3 rotor manifold has a really sharp bend coming off the front port. Won't that make the runner more restrictive than the others or even worse create a hot spot? What are the limits in terms of how tight a manifold bend should be?

I've made a couple of turbo manifolds for my old piston engines, space was very tight and to make the runners equal length meant tight bends at the port and some runners doing 300deg turns.
Worked out that having all these bends reduced the flow by ??% and having a non equal length manifold with runners alot lot shorter would boost quicker and flow better.

Weighed 1/3 of the weight too.

I think equal length runners are more of an issue with NA cars than turbo.

Yea its all down to pulse tuning with NA cars, equal length on turbo'd car is meant to help with a better spool up time but if you have to put sharp bends and big radius's whats the point.