I'm so confused about choosing a turbo..
Engine will be S5 half bridge.
My first thought was sxe 7670 1.0 a/r with two 44mm or 40mm external wastegates, just not to lost response but I want also to have top end power.
Also I don't want to run more than 16 psi.
Estimated goal power is about 400whp.
I am not interested in efr versions.
What are your thoughts?

 

you will need 25 psi for 400hp on the 7670, i had 310..15 psi.

 

This is dual waste gate open dump, sxe362(8376) with 1.0 twin scroll at 13 psi on 93 octane. This is dyno dynamics. You might want to go smaller than 1.0 though since you want response. It is awesome turbo for the price.

 

What fuel are you planning on running? ECU? Injectors? Fuel Pump? Manifold?

Being that you have a half-bridge setup, you're already going to miss out on a bit of power under 4k RPM anyways, so you might as well use the higher flowing base engine for it's intended purposes. I'd suggest the S364SX-E (8780) in which you take advantage of the Half-Bridge.

You can find it here: https://www.full-race.com/store/borg...8780-64-5mm-1/

I do consulting for that company, so if you end up going through them, be sure to mention "Ryan sent me" and see if they can do something more to help you out.

 

Stock ports engine? How soon do you see full boot?

 

Wouldn't the S364 SX-E be overkill for 400hp? I know its running (or you can get) the same smaller 76mm/68mm turbine wheel as like S362 SX-E. Will they spool the same or close seeing that they have the same turbine setup?