Reversed Throttlebody

All the water passages were cut away, a new tube must be run from the rear water port that exits the head to allow water to pass across the ECU Coolant Temp Sensor.  EGR and Jet Valve passages eliminated.

Cut apart using a bandsaw with a metal cutting blade.  Mark each side of the mounting section with a line perpendicular to the flange.  This is so when you rotate it the edges will line up.  Cut away as much of the cooling and EGR mount as you can before you do this you can get to the runner easier.

When they cast the part, they apparently had some of these passages already in the mold as there are internal layers that can be removed.

Grind off the weld bead then pry up and remove this plate.

All this will be cut away, only the mounting plate and the runner is needed.

The edges should be parallel for the least filler when you weld this back together.

The runners are oval, little more than shown from this angle.

Not all the excess metal removed yet, the upper portion is symmetrical so the fuel lines can still be used, just move the filter up a bit because the angle pulls a little more on the hoses.

There is about an inch above the lines to the hood, the throttle cable just reverse it.  You'll have to slightly bend the tube that mounts on the firewall it just lays on top the brake booster.

The intercooler tube going into the TB will come from the lower front from under the battery (or where it used to be) and the washer bottle will have to be a smaller one or be relocated then turn into the TB inlet.  The intercooler is a up/down flow instead of side-to-side.  The tanks are on the top and bottom and one connection is on top and the other is on the bottom.

All the stock wiring will still plug in.  Water from the rear of the head will enter where the CTS used to be and the CTS moves to where the vacuum purge valve was, this is a similar path the Magna intake uses to allow water to flow over the sensors.

Stock position

Reversed

Forward facing, note position of butterfly, does this allow for equal flow front to rear?

The intercooler tubing can take a couple different paths

After market regulator will be used, stock won't fit unless you change fuel supply hoses.  This is going to need a regulator anyway...

PCV and cruise hose positions, other ports face inward

2" tubing.  This is using a 16G, overkill on intercooler tubing will hurt both pressure and flow rates from the compressor wheel and just make allot more heat to get what you think is "normal" for it till fill up twice the volume of large intercooler tubing and have a reduced flow rate at the same time.

The intercooler position still undecided it might end up flat.  Higher flow rate and less pressure loss from this type core.