nvm talking to someone about it now

 

I dont think it's possible to run a twin scroll manifold with only one 50mm wastegate or at least it would defeat the purpose of a twin scroll manifold. I think you have to run two wastegates and the better choice would be two 38mm wastegates over two 50mm wastegates with this type of setup.

 

thanks didn't know that b4 but ill pm you my problem

 

it's doable to run one wastegate from a twinscroll system as long as the runners are divided almost up to the wastegate valve. you can look at the APS twinscroll kit for the subarus for reference.

 

I know you said NVM, but from reading the experience full race has had in regards to sr20's, they recommend going dual gates with anything over the T3 gt3076 TS setup. Even then I have seen SR20 T3 dual gate setups make more power then a single gate setup. It still mixes exhaust pulses two much even when there is a divider right up to the gate. If your going to bother with TS, then go with the dual gates. They will probably end up lighter and cheaper anyways, even if you have to deal with two dumps.

 

On a twin scroll manifold, two exhaust runners go to one side of the split or turbine housing and the other two exhaust runners go to the other side of the split or turbine housing. This means that you need one wastegate for each of the 2 sets of runners so that you get adequate release of exhaust gases between those 2 sets of runners. Does that make sense? I dont think it would work properly if you tried to run one 50mm wastegate because you would have to connect all 4 exhaust runners back together so they could release the gases through the one wastegate which would defeat the purpose of a twin scroll manifold. Also, 2 38mm wastegates on a twin scroll manifold would flow plenty of exhaust gases and you wouldnt need anything larger. Another thing that you need to know is, on a twin scroll manifold, its crucial to know which 2 sets of runners you connect to eachother so that you get the correct exhaust pulses to run the twin scroll manifold correctly. There is a lot to know about pulses and fabricating a twin scroll manifold so that it operates properly.

This is how I understand it anyway but I'm no expert on a twin scroll manifold.

 

Divided....

 

Same thing!! I bet it must bother you when people call diverter valves blow-off valves also...

 

No. Divided and twin scroll are two completely different things.

 

then you have a whole lot of explaining to do to the industry....