So I won’t the VAC3.2 on Here a while back and have been SLACKING on the review... There is a big reason for that... I FINALY finished the gauge install. Install was SIMPLE. Unplug the ECM harness, plug in the Van Aaken harness, and plug the ECM harness into the VA harness. Route the switch wire how you see fit and install the switch where you see fit. Mount the box and call it done. The box comes with 3M "Velcro" and fits nicely on top of the fuse box on the driver’s side. I chose to route the wire through the fender then into the door molding. I used some high grade aviation electrical tape that doesn’t come off of anything it seems like to keep it in place. I then mounted the switch on the top of my 3 gauge pillar. It looks like it belongs there. Now, without gauges installed... WOW seat of the pants dyno says OH WOW!! The box has three setting. Off, low and high. On off the box is boost fooling only. On stock fuel you can hit 35lbs of boost with a nice load. On low you can hit 39 to 41lbs of boost and on high you can hit 44 to 46lbs of boost. This is all I knew until I finished the fuel pressure and pyro on my truck... here is the rest... Fuel pressure drops JUST like stock. The C3.2 ONLY does fuel duration, not pressure. I am not sure, but I think in a pressure box the pre filter pressure SHOULD drop a bit faster... EGT... well... I need a larger turbo, that is for sure. On low it will peg to 1300 degrees but I have not been able to push it farther unless towing. When towing I can get to 1400 and I back off it. Low with towing and the cruise set to 59mph (on the GPS) mileage came up by .8 on the overhead, by .3 hand calc. The engine works more efficiently with the box on low. On high... well, high stands for high EGT in this case. If I am playing around town I can run through 3 gears before I have to back down. The good thing is it is a "Switch on the go" deal and you can switch around as needed/wanted. High ALSO stand for HIGH smoke!! I can smoke a lot like a 12 valve on high till I hit about 40lbs of boost. Then it clears up. Again, I need a larger turbo, and that will come soon. I am VERY happy with the Van Aaken Smart Box C3.2. BIG thanks to Dominator Performance Diesel!! Grant Bourne
