Improving turbo performance with equal length headers?

[cRiPpLe_rOoStEr]

Originally Posted by Isaac Zachary

The main reason for using diesel fueled HC-SCR is it means you only have to fill up (or fuel up) with one kind of liquid making it more convenient.

Way more convenient. But I remember something about attempts to use ethanol for HC-SCR, yet it still would make more sense to use it on a supplemental injection, which could decrease the NOx formation at the combustion process.

[Isaac Zachary]

Getting off topic here, but a diesel exhaust improver that I like, although full of technological hurdles to overcome, is emuslified diesel and water. It's the only method I know of that both reduces NOx and PM at the same time.

[cRiPpLe_rOoStEr]

Originally Posted by Isaac Zachary

Getting off topic here, but a diesel exhaust improver that I like, although full of technological hurdles to overcome, is emuslified diesel and water. It's the only method I know of that both reduces NOx and PM at the same time.

I'm only aware of supplemental water + alcohol injection.

[raubvogel]

To the OP: look at what big rigs do; they will try anything to save money. And check the Renault re20 turbo formula 1 engine. A well crafted equal header exhaust manifold ending on a divided turbine housing will increase spoolup speeds, but the question is always by how much. There is a diminishing return point: the Renault one is much further than yours as a 1s difference in acceleration may win a race. Mercedes has log manifolds in its AMG cars.

Also, check the technical session of https://www.theturboforums.com; there are people there with years working at real companies building intake and exhaust systems. You may find out you will need to start with what is your goal; to accomplish it may require spec'ing out a different turbo.

[cRiPpLe_rOoStEr]

Originally Posted by raubvogel

A well crafted equal header exhaust manifold ending on a divided turbine housing will increase spoolup speeds, but the question is always by how much.

Twin-scroll turbochargers are not so uncommon, yet dividing a split turbine housing is something I have never seen.