Twin vs single wastgates.

[jack.am]

That looks really good! Aus and NZ always have the best products, that’s going to be pretty expensive by the time shipping and duty are paid tho

**Ignore that, it comes with the WG. Okay I’m going to email them!**

Disagree, looks the worst of all worlds; disrupted flow from the wastegate runners, none of the benefits of twin gate packaging or pulse separation.

This looks interesting:

Mazda 13B FD T4 Exhaust Manifold

Specifications: Material: SUS347 Stainless Steel Investment Cast Construction M10x1.25P stud thread Features: T4 flange, split pulse design with runner separation all the way to just before the wastegate valve face Designed to accommodate up to Garrett G40 -1150 turbocharger Suits Turbosmart...

artecperformanceuk.com

Also the aforementioned Coleman manifold looks great.

 

[Shakeywakey]

Disagree, looks the worst of all worlds; disrupted flow from the wastegate runners, none of the benefits of twin gate packaging or pulse separation.

This looks interesting:

Mazda 13B FD T4 Exhaust Manifold

Specifications: Material: SUS347 Stainless Steel Investment Cast Construction M10x1.25P stud thread Features: T4 flange, split pulse design with runner separation all the way to just before the wastegate valve face Designed to accommodate up to Garrett G40 -1150 turbocharger Suits Turbosmart...

artecperformanceuk.com

Also the aforementioned Coleman manifold looks great.

What’s you reasoning behind thinking the 3d printed manifesto is bad?

Iv seen the artec while searching but I down want a short runner manifold

 

[jack.am]

What’s you reasoning behind thinking the 3d printed manifesto is bad?

Iv seen the artec while searching but I down want a short runner manifold

Having the wastegate runners merge at that point hurts flow to the turbo. With a twin gate design this is acceptable for packaging reasons to keep each exhaust path divided through the turbine. With a single wastegate you're introducing both crossflow between runners and disrupted flow from the merge. The only advantage that manifold has over a twin gate one is that it's cheaper and less complicated to use one gate.