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JD's assault on a 50+ mpg daily driver.

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Old 08-22-2008, 09:57 AM
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Default Re: JD's assault on a 50+ mpg daily driver.

Originally Posted by Joseph Davis
and I'm also looking into a hydrogen conversionwater injection for lower bsfc aka efficiency.
Are you thinking just a constant fine mist, or something involving a pulse-width modulated solenoid or combination of both?

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Old 08-22-2008, 10:42 AM
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Default Re: JD's assault on a 50+ mpg daily driver.

Continual fine mist triggered by the ECU under cruise conditions, the ECU switches to secondary mappings that are leaner and stuff.
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Old 08-22-2008, 11:21 AM
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Default Re: JD's assault on a 50+ mpg daily driver.

Originally Posted by Joseph Davis
Continual fine mist triggered by the ECU under cruise conditions, the ECU switches to secondary mappings that are leaner and stuff.
Straight water with something to break the surface tension i assume.

Still going to use the JAW setup or is it moot now?
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Old 08-22-2008, 11:30 AM
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Default Re: JD's assault on a 50+ mpg daily driver.

Your mother's a moot.

Why not separate microcontroller with input from the map + crank sensor.

Why give the ecu another thing to do?

Because tapping them could leak voltage, oh ok.
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Old 08-22-2008, 11:34 AM
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Default Re: JD's assault on a 50+ mpg daily driver.

just drive through puddles
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Old 08-22-2008, 11:59 AM
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Default Re: JD's assault on a 50+ mpg daily driver.

Yah, probably cut it with alky.

I'm still going to use the JAW, but only after I'm satisfied with the tune on the vehicle and then I can test it out to my satisfaction.
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Old 08-22-2008, 12:22 PM
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Default Re: JD's assault on a 50+ mpg daily driver.

JD, is you current MPG figure mixed or mainly highway?

I managed to get about 41 over the summer on a long highway drive with the B17. Granted it is only laying down about 150 WHP, but I was pretty satisfied since cruise speeds park the tach right at 4000 RPM.

Any idea what this combination puts down for power yet?

Good luck sir. I am curious to see how the water injection works out.
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Old 08-22-2008, 12:49 PM
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Default Re: JD's assault on a 50+ mpg daily driver.

It's mixed driving. Accel/decel in gear, in traffic like a complete ------- who thinks he owns the roads, some WOT rippers, and 2/3rds highway cruise at 75-80 mph.

I should have dyno time next week.
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Old 08-22-2008, 02:14 PM
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Default Re: JD's assault on a 50+ mpg daily driver.

Originally Posted by Joseph Davis
It's mixed driving. Accel/decel in gear, in traffic like a complete ------- who thinks he owns the roads, some WOT rippers, and 2/3rds highway cruise at 75-80 mph.

I should have dyno time next week.
That is pretty impressive then.

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Old 08-22-2008, 08:19 PM
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Default Re: JD's assault on a 50+ mpg daily driver.

bah, get a hybrid.....
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