Throttle body and intake manifold in Turbo vs N.A. engine (also cams)

[necktwist]

Eng-tips community, I'm sizing a throttle body and inlet hot and cold side vs the turbo inlet size, intake size, displacement, rpm. I'm an ME but I work on suspension not engines so please treat this like a noob question.

On a typical naturally aspirated engine larger throttle body seems to provide a HP gain especially with higher rpm, is this also the case with a turbo system with much greater air pressure and velocity? same question for intake manifold.

Also, what is the ideal camshaft for a turbo engine vs. supercharged vs. N.A. high rpm? thinking about optimizing for HP and efficiency. single 88mm turbocharger (TBD type), V8 5.0 L Ford Coyote engine.

Any thoughts appreciated before i spring $10,000 for a turbo kit, i want to know MORE than the guy building it. Thanks!

Jeff Check

 

[Lou Scannon]

Just as with an NA engine, you have to size the throttle body & ports to suit the volumetric flow of the engine. For the same valve events and power band, sizing doesn't need to change between NA & turbo. If you want to raise the power band, obviously you need to change the valve events, and increasing the throttle and port sizing is something to consider also, depending on the starting pont. The ideal turbo valve timing depends on the desired powerband. If you want the powerband to be similar to stock, stock valve events usually work pretty well.
The turbo needs to be properly sized to work well in the desired power band. A good resource to read up on turbo sizing is turbobygarrett.com.