I grew very tired of smoking off my rear tires in 1st and 2nd gear on the twin turbo since I turned the boost up to 12 psig. I simply don't need all that boost on top of the gear ratios down low. Once I'm into 3rd or maybe 2nd in some cases I like to have the higher boost levels.
There is a very clever way to modulate boost from the cockpit of the car and this is with an electronic boost control unit. This method of cockpit adjustable power is easy to have with a turbocharged car and you don't give up any efficiency of the system by overboosting and bleeding off boost, etc. It's a turbo exclusive arrangement. No other power adder can offer this setup so simply. There are some huge benefits with a boost control unit including, but not limited to the following:
1. Faster boost rise as the control unit eliminates wastegate greep
2. Ability to toggle between user defined "low" and "high" boost settings
3. Ability to turn boost way down for lower octane fuel and up for higher octane
4. Ability for user to dial up or down depending on the road conditions, other drivers (aka wife, girlfriend), etc.
This unit will allow me to toggle between my high and low settings with the touch of a button. It's like having a +/- 100 HP switch inside the car and that is no joke. I opted to go with an older model Profec B unit because I don't like the digital readouts and bells and whistles of the newer stuff...I just like it simple and straightforward. I have wired in a secondary "heat of battle" switch to allow for easy switching while driving the car.
Removal of the lighter and ash-tray allowed for ample room for the control head. Notice the ease with which the "red button" can be reached just by dropping your index finger.
Some Pictures:
