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Old 03-11-2008, 07:56 PM   #11 (permalink)
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I would LOVE to get my hands on the BSFC graph for my engine, but it looks like OEMs don't publish those anymore. That would really help me figure out what I need to do in less than a couple of tanks, until I get an SG.

I'm pretty sure I get better mileage at 3000 rpm than 1500. I know for sure that on the highway I get better mileage at 75 than 65.

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Old 03-11-2008, 09:27 PM   #12 (permalink)
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Automatic and Momentum

The automatic and momentum seems to hit the sweet spot around 45-50 (with gentle/rolling hills). What I have noticed is that 60 mph preserves momentum on long uphills before the ECU dumps more fuel to compensate -- depends on the grade percentage...

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Old 03-11-2008, 10:03 PM   #13 (permalink)
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Thanks to getting caught in the worst blizzard around here in thirty years last Friday, I had to drive about 50 miles at my best spot - 1000 RPM in top (0.73:1 overdrive) gear. As a result of that segment I had an exemplary tank MPG. 2 MPG over normal winter mileage.

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Old 03-11-2008, 10:20 PM   #14 (permalink)
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Ice?
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Old 03-12-2008, 12:18 AM   #15 (permalink)
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ICE = internal combustion engine
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Old 03-12-2008, 12:58 AM   #16 (permalink)
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Quote:
Originally Posted by MetroMPG View Post
ICE = internal combustion engine
oh, ok.. I was like, why are they talking about that on here of all places..

In the performance community that stands for Intake, Cams and Exhaust
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Old 03-12-2008, 08:27 AM   #17 (permalink)
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Quote:
I think we need a "BSFC Topo Map Collection" sticky. It would be a cool way to compare engine behavior. There could be little "X marks the gold" spots on it for MPG, .
That would be cool.
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Old 03-12-2008, 12:35 PM   #18 (permalink)
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Quote:
Originally Posted by jwxr7 View Post
That would be cool.
Here's one for my Saturn (Page 10), but the resolution is a little "fuzzy" (ha ha) :

Fuzzy Pareto Frontiers in Multidisciplinary System Architecture Analysis
http://web.mit.edu/deweck/www/PDF_ar...-2004-4553.pdf

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Old 03-12-2008, 01:06 PM   #19 (permalink)
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neat . I'm trying to find one for my engine.
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Old 03-12-2008, 01:11 PM   #20 (permalink)
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There's a real fuzzy one in there for the 1.0 GEO SI engine

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