My sleeper

[hammer]

I will see[emoji6]

[Wizard-of-OD]

By my Design is less backpressure than this one you Post with the flapper.

...thats the whole point. Reducing a twin scroll A/R from X to approx X/2 and then when desired bar/rpm is reached , the flap opens bringing A/R back to X.
Twin scroll by design only works well on paired cylinders. There is no Triple entry turbine housing (that I know of) so Skyline/Supra folk rely on a 6-1 merge collector followed by a flapper valve. Inline-5's suffer the same fate. Inline-4's however do not.
Would love to see back to back dyno's though , however , I am skeptical they will be significantly different.

[Cordoba16vt]

Can you explain better as to why you closed the oilway from the lifters? What exactly do you mean. And pls show a photo.

[hammer]

Closed the oilways from the lifters, because the cam had so high Lift that it will be opend the canals.
Sorry my Bad english, Hope you understand it

[hammer]

By my Design is less backpressure than this one you Post with the flapper.
Dont no if it work fine, but i will See it in three mounths

[Wizard-of-OD]

One of the cylinders is shared.

I can see that , still does not beg the question as to why?

Please do not take this as criticism and I appreciate the enthusiasm but this was tested in the Volvo community several years ago and did nothing for spool time considering the orientation of the pistons? At no given time are 2 pistons ever @ TDC like an inline-4 so twin scroll is pointless on an inline-5.

You would have been better off with a 5 into 1 merge collector and running one of the turbine inlets through a flapper boost controlled solenoid like this:

[V6quattro]

What oilway's are you closing?

[Greg_S]

stunning project. The exhaust manifold is impressive!

[hammer]

Made place for the cams

And closed the oilway

[hammer]

Every runner is over 500 mm and all have equal length.
1-3 2-5 and 4 (is shared for 250 mm back).
I Designd it for less backpressure and when everything is fine to positiv slope [emoji4]

[hammer]

[emoji23]

[igor136]

As you can see, the man was using a calculator. This is an innovative and interesting project.

[newsh]

Cool project but can you run me through the thought process in using a twin scroll set up on an Inline-5 if you have no intentions of shutting off one of the inlets?

One of the cylinders is shared.

[TBone]

oag, da muss man in einem englischen forum einen landsmann treffen mit einem krassen auto ...

[Wizard-of-OD]

Pics from my turbo (efr 9180) and my custom exhaust

Cool project but can you run me through the thought process in using a twin scroll set up on an Inline-5 if you have no intentions of shutting off one of the inlets?