why couldn't you run a 3" down pipe from the turbo into a custom built 3 inlet collector after the Y?
1.not enough room?
or 2.the turbo simply couldn't work with an extra long down pipe? if so,why not?
or 3.this is a totally unrealistic thinking,and i clearly have no clue how turbo's work lmao.(i know the latter part of 3 is correct lol)

research gathered from this thread:
https://www.ford-trucks.com/forums/5...6-9-7-3-a.html

 

you would need to make a y pipe after the headers, then one really long up pipe to the turbo, then a down pipe.

headers improve flow over stock manifolds, to give you better exhaust scavenging.
a turbo combines both exhaust sides to spin the impeller.

in my eyes, that would defeat the gains of the headers.

 

technically using multiple pipes up to a turbo is called a pulse turbo.
This does benefit the turbo.

Of course we have a large engine in limited space with a turbo that typically only make 10psi at wot.

I doubt it'd be worth the trouble in a pickup. But it *would* be better.

 

In that picture the passenger side manifold, turbo up pipe and exhaust Y are already installed.
You can see the studs sticking down from the Y and the drivers side manifold where the cross over bolts up to.

When you look at that picture think about how much volume of exhaust it will take to fill and also how close the turbo is to the cylinders.

Now look at the headers, figure in a cross over, do a 180 degree change in the exhaust path and get it back up to the turbo through this hole.



While thinking about that, I have a 2" body lift installed to have that much room between the engine and firewall so I did not have to cut the firewall to install the 3" down pipe.

And the last thing that enters into the turbo equation is exhaust heat.
The more heat you loose before the turbo, the slower it spools.

So now you have added lots of extra volume to fill with the header tubes, cross over and up pipe, and lots of extra length to the pipes so more heat can escape before the exhaust reaches the turbo.

So you added a huge amount of turbo lag till the headers and up pipe can build pressure and heat to spool the turbo.

 

those headers are designed for n/a use, not turbo use, there is a guy on oil burners trying to develop and sell both n/a and turbo headers, if you have some that are designed to work with a turbo it will boost a worlds difference, i talked to a guy with a custom set of turbo headers and a hypermax pulse turbo and he said it spools almost exactly like a wastegated turbo and that hes pushed past 15 psi but then got afraid