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I say this because a boost controller defeats one of the functions of the
Trionic engine management system. The Trionic system controls timing, fuel
mixture and boost. A add-on boost "controller" renders the Trionic boost control
useless. Without the built-in boost control, the motor is suseptable to any
condition that causes spark knock, low-octane fuel, high ambient temperature
high loads on the motor.
If you have driven a high-pressure turbo and monitored the boost gauge, you
would have seen the results of the boost control loop. Boost will initialy
be relatively high, near the solid red zone of the gauge, and then as the
Trionic system is doing it's control, the boost will drop back into the dashed
red area of the gauge. With a external boost "controller" this part of the
engine management will not operate.
If you want more power, upgrade your LPT to a HPT configuration. Several
people on this BB have done that.
Another option is to upgrade the current software
in your ECU with that from a reputable tuner, like Abbott or Hirsch etc.
A third option is to do the LPT to HPT conversion and then upgrade the ECU
software.
There have been many discussions on the NG900 BB about using boost "controllers"
On that board, there is one strong advocate who will state that an external
boost "controller" is a safe and cheap way of getting more boost. There are
others, myself included, who do not believe his statements.
The Saab Trionic engine management system is one of the most sophisticated
control system used on any motor in the world. Why anyone would want to
eliminate 1/3 of it's control function, is beyond me.
jj
'95 Aero, inspired by Abbott.
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