phunk

I believe you are going to find that the FI manifolds will take you where you want to go! When you are looking at a part that flows... whether its fuel system, cylinder head, exhaust pipe, intercooler, throttle body. Remember that there is no airflow/fuel-flow limit to any one of these components. As flow goes up, pressure will go up. Pressure drop across the A to B increases. Efficiency starts to degrade, but it never hits a wall and just stops. This is why the duration/length of a restrictive cross-section is equally important as the cross-section size itself.

As for the GT-R community.. look at the stock turbo manifolds for the GTR. They are integrated to the turbine housing (excluding 2020+ where they separated manifold and housing). People are upgrading the stock turbos from mild to wild, anything from just changing out the wheels on the stock CHRA and machining clearance in the housings, all the way to welding up the CHRA area to put in much larger turbos... and making 1200+ whp through the stock manifolds with stock internal wastegates (upgraded actuators). Those are some small manifolds!

As for CJM manifolds... I have been too busy to mess around much with fabricated products the last 2 years since I am not efficiently configured for that type of product. But I believe I did mention to you that I am in talks with someone who has been prototyping some cast stainless manifolds for the VQ that should meet your needs easily. I dont have a timeline nailed down with him but it sure looks like its close. Unless he falls off the earth I feel like he will have them done before the new year, if not any day now.

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