[s-cars] Boost controler recommendations

[Joe Pizzimenti]

Dave,

I use an HKS boost controller, but am considering moving to a manual
"schrapnelknobben" as it were.  The HKS works fine, but when you start
thinking about what happens when the solenoid freezes or the stepper
motor fails to, well, motor, life gets interesting real quick.
The HKS is the industry standard as I understand it and has a lot of
features, but it's worth a shot, before you spend another 500 on an
electronic device that might not do what you want, you may want to
look into a manual "Dial-A-Boost".

>From what I hear over in Evoland, the Hallman is one of the better
ones out there.  Especially since you're looking to hold a certain
boost level and make things less complicated, it's worth a shot, at
100 bucks for the Hallman Pro, it's worth it, since you can probably
eBay it for 90% of that if it doesn't work out for you.

Joe


On Fri, 21 Jan 2005 16:30:55 EST, Djdawson2 at aol.com <Djdawson2 at aol.com> wrote:
> Folks,
> I have recently installed a boost controller on my car.  Having tried
> numerous different chip boost profiles, it has become obvious that there aren't any
> that maintain higher boost levels in the higher rpm range.  My current chip
> allows a peak boost of 28psi, but by the time I reach 6k rpm, boost has fallen to
> the mid teens.
> 
> So, as an experiment, I've been playing with an early Turbonetics boost
> controller purchased used from a lister.  The price was "more than right" for
> experimentation purposes.  I've tried regulating boost using vacuum to the bottom
> of the wastegate, as well as boost to the top... I've also tried various
> springs and settings.  The results, however, remain the same regardless of how I
> regulate the boost.
> 
> Boost regulation through this unit varies by gear.  I can set it in 2nd gear
> pulls to achieve 25psi max... and it will maintain most of that level through
> 7k rpm... maybe 1 or 2 psi drop.  That, in and of itself is satisfactory.
> However, when I do a full throttle 1st gear pull, max is only about 20psi.  Go to
> 3rd gear, and it hits 30 psi.  4th gear, the needle was swinging so fast it
> went well past 30psi before I reacted and let off the throttle.
> 
> So, I'm thinking the unit is a little too rudimentary for the task.  I've
> tested it thoroughly with regulated compressed air, and everything reacts as one
> would expect... slowly increasing the duty cycle of the freq valve as boost
> increases... which in turn reduces the amount of boost applied to the top of the
> wastegate.  So I'm looking for recommendations on units folks have installed
> and had good success with.
> Thanks,
> Dave in CO
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