Want to build costom turbo kit. Need advice from boosted guys!

[pimp my yaris]

Fuel pressure is set at 45psi at idle.
And yes I am increasing turbo boost because that is the whole point of getting enough fuel to support it.
I was beyond maxing the stock in tank fuel pressure regulator at 12psi

I am running into a new problem in trying to get to 15psi. It looks like my current .48AR turbine turbo will not flow enough air to maintain 15psi. I am getting to 16psi now, but as rpm,s go up boost is falling off. Time for a new turbo and a new manafold.

This is what Im liking
http://www.ptuning.com/html/Item-Des...9&ModelDesc=xB

Plus a tial external wastegate and a .64AR hot side turbo with a new custom 3 inch exhaust.

[Scubaru Steve]

the higher a/r will easily add top end and help increase boost, you will lose spool, as in it will take a few more revs to spool the turbo.
id go with a .63.

Originally Posted by pimp my yaris

Fuel pressure is set at 45psi at idle.
And yes I am increasing turbo boost because that is the whole point of getting enough fuel to support it.
I was beyond maxing the stock in tank fuel pressure regulator at 12psi

I am running into a new problem in trying to get to 15psi. It looks like my current .48AR turbine turbo will not flow enough air to maintain 15psi. I am getting to 16psi now, but as rpm,s go up boost is falling off. Time for a new turbo and a new manafold.

This is what Im liking
http://www.ptuning.com/html/Item-Des...9&ModelDesc=xB

Plus a tial external wastegate and a .64AR hot side turbo with a new custom 3 inch exhaust.

[pimp my yaris]

Originally Posted by Scubaru Steve

the higher a/r will easily add top end and help increase boost, you will lose spool, as in it will take a few more revs to spool the turbo.
id go with a .63.

Yes thats the plan. And I definitly need the external wastegate. The internal gate does not move fast enough when cranking up the boost.