I sent an email off to Gturbo a couple of weeks ago and Rhys Bentink responded fairly quickly.
I had bought a red wheel for my 1HD FTE from them and an intercooler from PDI. There's a mounting hole in the bottom of the intercooler to mount a NPT elbow to take a pressure reading. They suggested that I use an alloy fitting and Raceworks had exactly what I was after.
On the Gturbo compressor housing is a brass elbow facing towards to block. I sent an email off to Gturbo just to clarify why brass and not alloy and why facing towards the block. Rhys said the aluminum thread would not be damaged by a brass fitting and that using an alloy fitting in the alloy compressor housing would gall (damage) the thread.
So I sent off clarifying email just to make sure I wasn't missing anything. As a winemaker I know a little about molecular charge, as the two metals exchange electrons the alloy would definitely break down, thereby fretting the thread in the compressor housing. I also asked if the brass and alloy threads were the same size and pitch why would the alloy fitting, made of the same material, gall the thread but a brass fitting won't? Rhys hasn't responded!
Rhys also says that the brass fitting is point towards the block because very few people fit boost control valves. I have yet to see any after market turbo with out some form of boost control. Let me know if you don't.
So the question is, does brass fret alloy and does an alloy fitting gall an alloy thread? Comments please.
I had bought a red wheel for my 1HD FTE from them and an intercooler from PDI. There's a mounting hole in the bottom of the intercooler to mount a NPT elbow to take a pressure reading. They suggested that I use an alloy fitting and Raceworks had exactly what I was after.
On the Gturbo compressor housing is a brass elbow facing towards to block. I sent an email off to Gturbo just to clarify why brass and not alloy and why facing towards the block. Rhys said the aluminum thread would not be damaged by a brass fitting and that using an alloy fitting in the alloy compressor housing would gall (damage) the thread.
So I sent off clarifying email just to make sure I wasn't missing anything. As a winemaker I know a little about molecular charge, as the two metals exchange electrons the alloy would definitely break down, thereby fretting the thread in the compressor housing. I also asked if the brass and alloy threads were the same size and pitch why would the alloy fitting, made of the same material, gall the thread but a brass fitting won't? Rhys hasn't responded!
Rhys also says that the brass fitting is point towards the block because very few people fit boost control valves. I have yet to see any after market turbo with out some form of boost control. Let me know if you don't.
So the question is, does brass fret alloy and does an alloy fitting gall an alloy thread? Comments please.