Hi there
20VT, are u the same 20VT on the Audi Forum ZA?
Best is to go through the posts on the forum, lots of info on how WI influences your A/F ratio etc. and what mixes you can run.
If I can give you any advice on tuning a vehicle with WI it would be to set up two different ignition and fueling maps for the car. If you are running a standard Bosch engine management then it won't be possible with the standard unit and not with chip tuning. You will have to fit a wire in management system that allows you to run two maps (Unichip does this effectively) or a complete engine management system (Motec, Microtech, EFI srl, Pectel etc.).
The Aquamist 1 s system is not the most intellegent system, but it will do the job. Does your system have any of the following components? pressure accumulator, FIA2 module and High speed valve HVC.
The above components will allow you to tune the WI system more effectively, without these components it is more a case of switching the system on and off with very little control over how the water injection is done.
I would suggest that you fit a water pressure accumulator because it will extend the life of your ERL pump since it will not working constantly to maintain pressure.
The FIA2 module allows you to match the water injection to the fuel injection with the help of the HVC.
Are u going to run pure water or a mixture of water/ metahnol?
Depending on the above u will have to match (at the correct ratio) your WI nozzle flow rate to your fuel injector flow rate.
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