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Wouldn't the plenum volume technically be all the way to the turbo under WOT conditions?

Strictly on pipe size, turbulence and heat (by compressing slightly) would happen if there was a neck down...

So we agree the air filter to turbo pipe should be as large as you can fit all while keeping the airflow smooth and cold?

I liked iturbo's Theory that the larger charge pipes pre and post turbo...

Let's say you're using an air filter minder type of device. http://filterminder.com/ If it indicates no restriction, could there be gains to a larger pipe? Obviously cold air and smooth transitions...

What was there before? Any other changes? Any guess on power gains?

Intake, charge pipes, intercooler upgrade and 3 inch exhaust on 14 psi? What size is the maserati throttle body?

Is than on an otherwise stock t2 engine?

This is all good info. So maybe a 3 inch pipe from air filter to turbo inlet with a reducer right at the compressor is beneficial

How about having charge pipes larger than your intercooler inlet...

Quite an increase! How much larger were the new filters? Same dyno too?

This came up in conversation with a fellow turbo car guy at work, so I thought I'd pass along the conversation and get some of your input.

Basically, let's say you have a dead stock turbo 2.......