custom 4"-3" down pipe with 3" cut out 84 GSL

[RICE RACING]

Originally Posted by Bryan@BNR

Title says it all. I just got done with it today. The internal wastegate actuator cracks the cutout open at 14 psi and fully opens at 25 psi. Like keeping the quiet 3" exhaust from the MP back, but then have enough flow for big power .

Hey Brian,

Have you ever tested exhaust back pressure in the turbine outlet on your cars? or this one?

I only ask cause I never had and in my current car I decided to do so and even with a racing catalytic converter, middle muffler and rear muffler my "exhaust system pressure is quite low" when running 3.5" diameter. Turbine inlet pressure is always lower than Inlet manifold pressure too.

I run a T04Z with 1.00A/R with 13B-REW.

Peter