Compound Sizing - s363 / S475 Advice

[Tobin]

I have been looking at charts, formulas, pressure ratios, etc. until my eyes are shot and this is kinda of what I came up for my setup. 12v, 650hp, 4k RPM, automatic. Something that is very streetable, tows ok and makes good power. Any comments? I am probably way off on sizing these.

s363 Specs

s475 Specs

 

[Tobin]

Any comments? Am I waaay off here?

 

[jlbayes]

Do you want power to be made at 4k?

 

[Tobin]

Do you want power to be made at 4k?

I don't know what you are getting at? I do want to put a tighter turbine housing on the small turbo.

 

[Drothgeb]

I'd go smaller on the secondary, maybe a 62/68/.7wg, and use the 87mm turbine on the 75.

 

[jlbayes]

I don't know what you are getting at? I do want to put a tighter turbine housing on the small turbo.

The setup is too small for power at 4k imo. :Cheer: