Hello, couple a questions. How much would swappin in an hx help me out in the egts, right now my truck can get really toasty on the long steep hills. Also will I notice a slower spool up on the hx and is it a dierct bolt on in place of the hy35. Thanks in advance

 

A truck with an automatic transmission has to meet soot emissions standards when torque converter slip allows the engine accelerate quickly. This does not usually happen with a manual transmission because for the engine speed to increase, the truck must accelerate - and that takes time. The HY-35 builds boost a little more quickly than the HX-35 does when the engine load is light, so from an emissions standpoint the HY-35 is better suited to stop-and-go driving with an automatic transmission.

FWIW: The HY-35 and HX-35 are functionally equivalent under most engine loads, and the wastegates on both turbos are set for the same boost level. The HY-35 does not breathe as well as the HX-35 at higher speeds under a heavy load. The choke point of the HX35 is around 35psi; the HY35 chokes at about 29psi.

So in other words, the HX will help cool but your going to get a little turbo lag.

 

That is the first turbo swap I did. It was a litte help but not enough for what I had at the time. I should have waited and bought what I wanted. It is pretty much a direct bolt on deal but there should be 2 studs you will need to replace and add bolts in there place.

 

Allright, thats kind of what I was expecting. Im mainly lookin to drop my egts a bit. On a long hill will I notice much of a drop in temps? Also someday down the road, I could use the turbo as the top turbo in a mild twins setup couldn't I? thanks for the responses.

 

Plenty of kits out there to go under an hx35