This is supposed to be a new turbo garrett introduced to fill a niche for the 850hp level in a compact set-up. Anyone tried it on a jz engine yet ?
I dont see the GT40R turbine wheel being able to flow enough for the GT42R compressor wheel. And I dont see it spooling as fast or faster than a GT40R. The only advantage I see running this turbo is on certain applications with a limited amount of space. This is all theory though. I hope to see some dyno sheets from people running this turboIt wont make as much as a GT42R, who said that?
However, it will spool faster....
That was the same answer I got from the guys over at Precision Turbo.The GT4094R spools only about 200-300rpms faster and will NOT support the level of power the 42R will. The turbine wheel flow will fall off as well since the efficiency of the 40R turbine is not as high as the 42's. If space is limited then yeah run it, but if you have the room, go 42R.