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Old 02-17-2011, 12:12 PM   #32
Scooby Specialist
Member#: 56414
Join Date: Mar 2004
Chapter/Region: MWSOC
Location: Olathe, KS
2004 Forester XT 5MT


Originally Posted by 2011 STI SEDAN View Post
Sorry for the greenhorn question...But could you please explain? I understand the off the shelf COBB AP. But when you say protune, you lost me in that concept. Need help in understanding when this would be required, needed. or wanted...Please help?
Protune is simply tuning a map to be specific for your car. Every car is different. For example, my car with the graph above had a 10.5:1 AFR instead of the 11.2:1 target that the OTS map should be hitting. If I protuned for my car, we could get the AFR's back where they should be and I'd make more power than the Off the shelf map and still be safe.
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