I've been corresponding with a shop in Arizona that has developed and is testing a controller that allows you to open the exhaust flaps completely (as in race mode) in any mode. Here's the response below. You should feel free to contact them...it may make them speed up the development if there's a lot of interest:
I am testing the controller on two Guiliaís at this time. The first test (from an owner in the Netherlands) has come back with positive results. I made a minor adjustment to the controller configuration and am conducted a second test (with an owner in the USA), that should have results within 2 weeks or so.
Preliminary results is that the controller will only be able to provide two modes of operation Ö
1. Normal (the carís ECU controls the exhaust flap valves just it does now)
2. Always Open Ö you will have ability to open force the flapper valves open at all times.
The controller has the ability for a third function Ö Always Closed Ö however, in the first test when this option was enabled, the sensors in the exhaust detected too much back pressure when in RACE mode, forced an immediate Check Engine Light warning. This only occurred in RACE mode. In the second test, the Always Closed option is disabled and a different car is used for this evaluation. I am fairly confident that the second level of testing will be successful.
In summary, it is likely that for the Guilia, only two modes will be enabled (Normal and Open). This should not be a problem because when you want to have the valves closed, switching to normal mode and reducing the engine RPM will cross the threshold where the ECU will close the valves. Normally, you would want this when going fairly slow anyway.
The only disadvantage is that the Always Closed option has been a desirable option for people who track their cars at venues that limit the sound level. It is appearing that for the Guilia, I wonít be able to offer this option as the carís sensors donít seem to like it. Throwing a Check Engine Light will not be option for most owners. But, with the Always Open option, you will have the option to keep the valves open for that throaty exhaust note at low or high engine RPM levels.
I will notify you when I have the product ready for sale.
480 227 3474
Forza Componenti darkdragon2-150x171
13271 E Del Timbre Drive, Scottsdale, AZ 85259