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If you're trying to improve city mpg with a stick shift then you might want to look into a blow-off valve. This dumps manifold boost during shifts to reduce the load on the turbo and keep it spooled when you're building boost with the throttle closed and cut off exhaust flow to the turbine. This should help you get boost up faster after a shift at low engine speeds and should make the car more drivable. With your low compression ratio you need to keep it in some amount of boost to improve your thermal efficiency. Driving technique should help as would a scangauge; this setup should respond well to some P&G assuming you can keep it out of open-loop enrichment.
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