I've got an HTT Stage III HX35 on my first gen, I was wondering how much boost I could pull out of the thing before it gets out of its efficient range and starts over-heating the air?

Saying that a stock HX35 is good until 35psi, and a HX40 is good for 40psi, I figured that it should pump out a cool 40psi since its basically an hx40 compressor.
Correct me if im wrong.

 

Where did you hear that an HX-40 is "good" to 40 psi? Even the modified Holset compressors (HTT, PDR) are all pretty much done by 38 psi.

The benefit that an HX-40 gives you over an HX-35 or H1C based hybrid is more exhaust flow, not more boost.

 

Sounds about right. I have a dodgezilla wich they say is good for around 40/42 psi, and both turbos are very similar (35/40 hybrids). My 35 psi boost gauge will bury itself so I guess it`s capable of making somewhere around that.

 

high tech says: do NOT go over 38 psi. it might even be 36. i can't remember. you should give them a call.

 

My PDR 40 is set at 38#, but I guess they are cutting back to 32, to prevent shaft breakage.