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Old 07-31-2008, 01:43 PM   #6 (permalink)
Mechanical Engineer
Join Date: Jun 2008
Location: Richmond, VA
Posts: 190

The Truck - '02 Dodge Ram 1500 SLT Sport
90 day: 15.15 mpg (US)

The Van 2 - '06 Honda Odyssey EX
90 day: 22.63 mpg (US)

GoKart - '14 Hyundai Elantra GT base 6MT
90 day: 29.23 mpg (US)
Thanks: 0
Thanked 7 Times in 6 Posts
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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