I am in the process of converting the Perrin FMIC into a anti-clock wise flow system. I thought about using the original perrin hot side piping as my cold side charge piping that connects the intercooler and throttle body. I measured the piping and it is 2.0" ID, and my custom hot side piping is also 2.0". If memory serves, the gt35r compressor outlet is 2.5" with a 2.5" to 2.0" coupler. * Just to clarify, outer diameter of compressor outlet is 2.5", inner diameter is 2.0"* I've read the ideal intercooler piping size is the balance between gas velocity and volume, my concern is would the 2.0" piping be to small to support 65lb/min flow? Would 2.0" the piping act as a choke point and horsepower and boost level starts to increase? It seems Crawford's CP35R kit also utilizes small intercooler piping so at least one company is interested in the piping volume vs. throttle response. I never took fluid dynamics so I'm pretty much blind of this subject. Please feel free to comment.
I think the compressor outlet is the same (2"). The 2.5 - 2" couple comes into play at the throttle-body where it needs to be expanded to 2.5 to fit the throttle body. I only have dreams of a 35r though...
* Just to clarify, outer diameter of compressor outlet is 2.5", inner diameter is 2.0"* technically you would be blind if you were blindfolded now would ya
I am assuming you are moving to a counter clockwise design to avoid the cold pipe going over the turbo. Have you done any research on how bad the 180 degree turn right after the compressor outlet would be for flow?
you are probably thinking: but my hotside piping is custom with something similar to the following picture so there is not going to be a 180 degree or even a 90 degree turn right off the compressor something like this