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Old 02-25-2014, 08:52 AM   #5 (permalink)
oldtamiyaphile
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Join Date: May 2009
Location: Australia
Posts: 1,510

UFI - '12 Fiat 500 Twinair
Team Turbocharged!
90 day: 40.3 mpg (US)

Jeep - '05 Jeep Wrangler Renegade
90 day: 18.09 mpg (US)

R32 - '89 Nissan Skyline

STiG - '16 Renault Trafic 140dCi Energy
90 day: 30.12 mpg (US)

Prius - '05 Toyota Prius
Team Toyota
90 day: 50.25 mpg (US)

Premodded - '49 Ford Freighter
90 day: 13.48 mpg (US)

F-117 - '10 Proton Arena GLSi
Pickups
Mitsubishi
90 day: 37.82 mpg (US)

Ralica - '85 Toyota Celica ST
90 day: 25.23 mpg (US)

Sx4 - '07 Suzuki Sx4
90 day: 32.21 mpg (US)

F-117 (2) - '03 Citroen Xsara VTS
90 day: 30.06 mpg (US)
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Quote:
Originally Posted by Daox View Post
You'll want to accelerate hard enough, but not so much that it kicks you into open loop where you'll hit fuel enrichment and ignition timing penalties. Do you have a SG or UG so you can monitor that?
Enrichment seems to be a myth. Of my cars only the Skyline does enrichment at WOT. It's been posted time and time again, but I wonder how many cars actually do it?

Nowadays, I accelerate at WOT and shift at around peak torque. In low boost turbo cars, I believe shifting at peak torque is the way to go.

I don't think a SG/UG is of much use. You can set it to 'fast' refresh rate, but it's really no faster than my factory MPG display. The only plus side is you can calibrate SG/UG to your driving so it's slightly more accurate (potentially). Normal drivers find Fiat's OEM instrumentation to be optimistic, but (possibly because I glide a LOT) I've found it pesimistic on occasion. Unless you want the other OBD based features, I wouldn't bother with aftermarket instrumentation.

If you really want accuracy, MPGuino is the way to go.
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