I have a manual boost controller mounted under the hood.
All it is, is a needle valve and check valve thingee that attaches to a vacuum line from the turbo.
Cost about $80.00
If I'm running say 8psi and want to increase the boost, I just turn the valve in.
Every 1/8 turn either increases or decreases the boost about a pd. depending on which way you turn the knob.
Takes maybe 1 minute to adjust the boost level.
There are better ways of doing it then a manual controller, but this is ok for the moment.
One more neat thing----- I put a Probe intercooler on my car that I got from a junk yard for $100.00.
This was before Hahn came out with their kit.
At the time, I was running 6psi boost, when I put the intercooler on, there was a very noticeable increase in power.
The boost level actually fell off about a pd. or so, but just cooling the intake air made a big difference.
Maybe it hasn't been mentioned yet, but there is one Big problem with the turbo.
The first time you step on it, your face might break from the big grin.
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Hahn turbo, water cooled, intercooler, T-2 rods, Wiseco pistons, Crane #14 cams, adjustable cam gears, tensioner upgrade, GT intake manifold, larger injectors, bored throttle body, full porting, S.S. valves, 3" custom exhaust, Autometer gauges, Eibach sway bars, Keystone ram air hood, bumper covers, S.S. lake pipes, Stull beltline and hood molding, E&G billet grille and side molding.
Turbo install and engine upgrade by Bob Stockum,
http://www.bstockum.com