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Old 25-11-2005, 03:03 AM
Donkeypunch Donkeypunch is offline
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Join Date: Oct 2005
Location: Groton, CT
Posts: 10
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I had my car tuned on a snow performance kit using a UTEC and VF22 at XXtuning. The tuner needs to understand what he can do with the engine management, and what water injection will do to the base tune (prior to tuning with water injection. There the tuner gets a baseline AFR, and then goes from there. Granted UTEC is easy to scale fuel out of, but I know quite a few people running ECUTEK with WI, no problems. You have to scale the fuel out with water alky injection no matter what type of fuel you run, 91, 93 or 95 or better. You have to eventually make the AFR good for the engine. 12:1 being about ideal for a subaru 2.0 ltr. Of course more fuel is going to hurt the engine. You a prone to more misfire, and lose power due to lack of oxygen to combust the fuel right. THe fuel we use isn't oxygenated like nitromethane. That is why tuning for WI/WAI is essential to a safe/powerful tune.

DP
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