i have a manifold over at smgracing here in warwick ri being made for a fd . almost done long runner style t4 divided single wastegate . going for the 700whp + numbers dyno testing soon . piping is sch 40 polished in and out . this is a few pics of it almost done . coming out nice .

 

Are the long runners just to fit the giant turbo?

I ask because you have attached collected short runner wastegate runners to the manifold so as far as pulse tuning it is short runner manifold.

The norm for collected wastegate runner length would be turbo runner length plus turbo scroll length (for divided exhaust housing turbo) so it doesn't affect the pulse tuning.

HKS-



Greddy style-



Random smaller JDM shop-



Random smaller JDM shop (note path of exhaust from engine to wg collection)-


IDk if it matters, just something I noticed on collected wastegate runners.

I would think short runner pulse tuning would work well for the high rpm powerband of the large single turbo.

 

Basically for show in the engine bay and to be durable