[Thecatch83]

With the improvements in turbo technology (see BMW twin turbo, Porsche variable turbine geometry etc.) turbo lag and temp issues have been virtually eliminated.

I have also noticed that larger displacement engines seem to go with a supercharger set up i.e. ZR1, CTS-V....6 cyl cars go turbo 911, new skyline, bmw 335i, etc. (with a few exceptions).

I think it also comes down to fitment and location issues. Looking at the Yamaha 2UR-GSE engine, I don't see much room for a turbo or supercharger and I think adjusting the engine management and changing the electric motor-controlled intake and hydraulically adjusted exhaust valve timing seems a tall order for tuners

 

[Thecatch83]

Maybe Porsche has worked out the temp issues, but BMW still has some work to do in that department.



Agreed, there isn't a lot of room. Might need to put a large bump in the hood for the supercharger, or maybe just cut a hole and open it up to the outside for all to see and hear...

Or call JEGS and switch to a cowell induction hood and put a "drive it like you stole it" bumper sticker on your car!

 

[Thecatch83]

If you ask me, it looks like they oversized the hood for the needs. The engine bay looks crowded, but a low profile screw blower will take up no more room that the intake that is there now. We shall see.

Turbo lag is non-existant on small displacement, high duty cycle engines or where you group cylinders together to maximize pulse timing. The higher the CFM of the turbo the more it will lag obviously. So larger power always takes spool time. The turbos BMW uses are the size of a canned ham.

Fig

And even though the 335 has small turbos, there is absolutely no room to add a larger trim turbocharger. That is why you don't see any turbo upgrades to that vehicle, only tuning!

I've said it before, the R&D upside is not enough for companies to build a supercharger or turbo for the IS-F because of its limited production and even smaller demand for owners who actually want to void their warranty (TRD exception) and make prodigious amounts of horsepower!

Intake/exhaust is all you will see down the road...and you can forget about tuning because from what I have researched, Toyota keeps their ecu's on lockdown; And I doubt yamaha/skunk built this car to be modified.