i'm planning on making a custom divided manifold and i am using a single wastegate.
is there still any real gain in making the manifold fully divided if the wastegate tube taps into both runners? would it help to run two pipes to the wastegate and allow them to mix farther from the actual turbo runners? is there a better way to do this?
thanks,
justin

 

Of course the ideal way would be to use two wastegates but that is not always practical. A lot of companies seem to be using two runners which merge into one just before it enters the wastegate. This is not ideal, but it must work well because everyone is doing it. You might have some trouble finding hard data on the benefits of running two wastegates versus one based on the fact that there aren't a whole lot of people who have the resources or the know how to go about figuring this sort of thing out. Common sense tells me that the small gain in performance just might not be worth the trouble. As far as the length goes, I would make the runners as short as possible to prevent any risk of boost creep.

 

Is it me, or is this extremely funny.

 

there's no difference between 1 or 2 wastegates. just use 2 runners toward the single wastgate. actually, making the wastegate runners longes is better, it'll allow the wastegate to control boost more accurately.