Controller: GReddy PRofec-B
PRofec stands for Pressure Offensive Controller. What that means we're not really sure, and we don't care. The PRofec-B is really good. GReddy's "basic" model features a dual solenoid design similar to the Blitz SBC i-D. The solenoid assembly is somewhat bulky, but mounts easily enough in the engine compartment. An additional pressure signal must be brought to the back of the control unit in the cabin. Our tester came housed in a translucent blue case, which lets you see all the electronic bits inside. When lit up at night, it looks like a cross between a UFO and a holiday ornament. Basic black is available for a few bucks more.
Where the PRofec-A must be trained in the ways of your turbo, the B model comes out of the box smart. GReddy specifically recommends this unit for sequential cars and problem cases. Straight-away boost is responsive, though further tuning can be made with the balance dial. High and low boost each get their own dial, all of which normally sit flush, and pop out for adjustment. Toggling between high and low boost is accomplished either by the mode button on the control unit, or through the use of GReddy's optional wireless remote switching system. Mount it on your steering wheel, shifter, key chain or girlfriend.
| CONTROLLER: GREDDY PROFEC-B |
| PRO | Super simple, works great. |
| CON | Sensitive knobs. |
| COST | $420 in black, $399 in blue, |
| remote switch: | $128. |
| SOURCE | GReddy Performance Products Inc |
| (949) 588-8300 |
| www.greddy.com |
Aesthetics: Looks like a Xmas tree ornament.
Ease of installation: Yes.
Clarity of Instructions: Fine. Available on Web site.
Features: High, low boost, adjustable response.
Performance: Grrrreat!
Controller: HKS EVC EZ
The EVC EZ is out there for those who just want a dial in the cabin, and that's all you get. Be forewarned, however; it's a mighty sensitive dial. HKS claims the EZ can take you to 35 psi, which is probably true.
The stepper motor used for boost control is the same as used on the EVC IV. Installation is a simple case of hooking up power and ground. Three hoses need to go to the intake manifold, compressor discharge and wastegate. If you have a twin turbo Supra or RX-7, you can find vehicle-specific instructions in the Japanese manual. They're in Japanese, of course. Unless you purchased the optional installation kit for your vehicle, run out and get a 6mm vacuum tee before you start working, as one isn't supplied. Finally, flip the switch on the back of the unit to select internal or external wastegate and you're all set.