Tuesday, March 31, 2015

Dyno - Mileage


In Daytona I took the car to Redline Performance for extra tuning of the engine control computer. Although it ran well and made lots of power, fuel economy was very low at about 14/16 mpg when driving gently on the street.

We ran the car on Redline's Dyno Mite Chassis dyno, monitored air/fuel ratios (AFR) using the dyno's Wide Band Oxygen (WBO2) sensor on one bank and my Innovate LC1 WBO2 on the other. This allowed us to safely lean out the AFR at low load and RPM for better economy (and improved pollution control).  We couldn't resist a couple of runs and minor changes at higher RPM and full throttle. Minor changes also added about 15 HP at some points in the power curve and around 10 HP at high revs and peak power.  When compared to the base map that was developed on a SuperFlow engine dyno a couple of years ago, power, mileage and driveability are all improved. :)  It was a productive half day.

Fuel economy improved to around 21 MPG in the several hundred miles driven since the "Tune Up". :)

In total we drove Uggs 1323 miles in warm sunny Florida during the trip.

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