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Interesting, I read something I think which is similar recently.
Quote:
About the tune... I live near Seattle and a local shop here (Outback Automotive) does custom Subaru tunes for $325 to perfect the A/F ratio map. On bone stock turbo Subarus the shop commonly sees a 10% gain in power and a 20% increase in fuel mileage. END OF QUOTE.
Is this similar to what Promotive did with your Boxster?
Air/Fuel ratios?
What else?
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1977 911S Targa 2.7L (CIS) Silver/Black
2012 Infiniti G37X Coupe (AWD) 3.7L Black on Black
1989 modified Scat II HP Hovercraft
George, Architect
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