So im getting ready to build a compound turbo setup on my 4bt. Now i got a few questions on how to spool the larger turbo. And i got to thinking the more air i can push thru it the quicker it will spool. So I drew a picture of what I was thinking.




Or would you just recommend running it like this.



Thoughts and opinions. Flame away if you must but at least explain why it wont work.

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Third setup choice

 

There's only one realy way to do compounds. Your second pic. There's a reason thats how people have been doing it forever and ever .

Just make sure the exhaust goes through the little turbo first, and the intake goes through the big turbo first.

 

Those other two (first and third) are interesting concepts, but I think the second is going to easily be the most effective.

And ditto to what madmike said.