Been meaning to ask, why no intercooler?
Joining the 20lbs of boost and some copper line club I see
I did the same thing on my 2+2. Nobody has a 4 port setup for a blower intake that sits flush to the valley cover so I had to head to the hardware store. People said it would work harden and leak but its been 3 years and 5k miles or so and its been fine for me.
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Work hardened copper, eh? As opposed to a ruptured rubber hose or a rusty steel line? People love to talk and speculate. Copper has been used in automotive applications for a century or more. In both instances these are pretty benign uses for thick walled copper line. Ironically the 4.8L I picked up last Winter did come with the coveted four-corner steam line - it is just rusty and buried, and I cannot be bothered to tear that engine apart to get it (and clean it up).
Now on to your other question: Why no intercooler?
I am looking to play with the I/E pressure ratios on this set up. I will be putting a pressure port in the turbine housing and the down pipe, and then I can datalog the difference. There are lots of unfounded and unsubstantiated theories about hot-side and cold-side benefits of exhaust manifold design, pipe sizing, density makers, intake manifolds, etc. The goal is to minimize the restriction on both sides of the turbo - it isn't a free lunch - so its 4" pipes on all fronts to help achieve this. I will be putting a card-style MAF on this to determine the airflow (since that is all that matters) and if the IATs get out of hand: pre-turbo water/meth injection is the plan. I prefer the concept of flow potential over pressure.
This is also a weight savings thing.