I've been stashing this for a while but it's almost done. This DIY intake manifold is part of my supercharger project but was a project in itself. There's a lot of little stuff going into it worthy of notes.
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The factory manifold is polished as are the steel fuel rails. It was fun going over little stuff and not spending a whole lot of money. The trade off is labor intensity. The manifold will still look like a "budget" piece when done but with some prettier peripherals and attention to details. There's about $400 worth of parts and work in the manifold with the Paxton, 440 injectors, and modded stock fuel rails. Emphasis is still mostly on functionality.
The WRX fuel injectors don't reach all the way down into the manifold pockets. I'll be trimming that material back inside the ports to unshroud the fuel injectors. That's the only horsepower mod that it will really have for port modifications.
I'll be using the parallel fuel rail mod and 440 injectors for some mild supercharged boost and E85. The fuel regulator in the picture is a Paxton adjustable unit to mount on firewall. There is enough fuel and flow on tap for 350hp+. I used slightly larger 5/16 fittings and trusty NAPA multi-fuel compatible line...6 feet of it. Braided line will come later as money allows.
All of this warranted using a spare intake manifold. Polishing it for appearances was bonus work to go with all the other work :crazy:. The new intercooler, piping, and brackets will be polished, too. The twin-screw supercharger is brushed aluminum. Anodizing and higher budget stuff was out of the question. Polishing is some labor but probably what a dedicated home enthusiast would do with their tools.
The factory manifold is polished as are the steel fuel rails. It was fun going over little stuff and not spending a whole lot of money. The trade off is labor intensity. The manifold will still look like a "budget" piece when done but with some prettier peripherals and attention to details. There's about $400 worth of parts and work in the manifold with the Paxton, 440 injectors, and modded stock fuel rails. Emphasis is still mostly on functionality.
The WRX fuel injectors don't reach all the way down into the manifold pockets. I'll be trimming that material back inside the ports to unshroud the fuel injectors. That's the only horsepower mod that it will really have for port modifications.
I'll be using the parallel fuel rail mod and 440 injectors for some mild supercharged boost and E85. The fuel regulator in the picture is a Paxton adjustable unit to mount on firewall. There is enough fuel and flow on tap for 350hp+. I used slightly larger 5/16 fittings and trusty NAPA multi-fuel compatible line...6 feet of it. Braided line will come later as money allows.
All of this warranted using a spare intake manifold. Polishing it for appearances was bonus work to go with all the other work :crazy:. The new intercooler, piping, and brackets will be polished, too. The twin-screw supercharger is brushed aluminum. Anodizing and higher budget stuff was out of the question. Polishing is some labor but probably what a dedicated home enthusiast would do with their tools.
. Those look like the new 2200 injectors. 1/2in fuel line? You aren't fucking around.
