as the DS3R 1.6t rally car with 28mm restrictor is around 200hp, I guest 27.8mm will make around 195hp.
my engine is a copy of Toyota 1NZ with turbo & 9:1 compression ratio. for a limited air intake, I designed to make higher compression ratio to make more power .
As I have no budget for race piston, REAL 1NZ piston should be a good choice, even Vitz TRD 1.5T are using that piston.
However, the 9:1 piston of my car have some coating for low drag & it strength is higher, the normal 1nz piston didn't. which will be better choice?
the turbo 9:1 piston of my car
left: 9:1 turbo piston right: 10:1 na piston
& someone suggest me, just make it like a na engine, drop the turbo to 0.5bar, & take the Prius FXE 13:1 piston
its sound so crazy to charge a 13:1 non racing piston, but I'll use E85 for fuel, might be it will work?