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Old 04-25-2018, 11:00 AM   #21 (permalink)
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Using my Ultra Gauge, I have taken some fuel flow rates at a selection of idle speeds.

Engine Fuel MAP
Speed Flow
(rpm) (G/hr) (psi)
750 0.14 3.8
1000 0.17 3.48
1250 0.21 3.34
1500 0.23 3.05
1750 0.29 3.19
2000 0.31 3.19

As my car has a MAP sensor with no MAF, the Ultra Gauge appears to assign a VE of 75% across the whole load/speed range and then calculates the air flow based on the manifold air density and this assumed VE. The fuel flow is then proportional to the air flow.

I am curious if any North American owners have measured idle fuel flows as their cars have a MAF sensor and thus the fuel numbers should be more accurate?


Last edited by cr45; 04-25-2018 at 11:06 AM..
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Old 05-12-2018, 10:44 AM   #22 (permalink)
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Mirror Delete

Deleted passenger mirror today and subsequently got a new mpg best on a 14 mile out and back trip that I have driven approx 10 times in this car. I always glide on down slopes when I can on this route as the traffic is very light.

New best 69.11 mpg US / 83 mpg IMP / 3.4 lit/100km

Engine started from cold - 62 oF water temp

Previous best on this route was 64.95 mpg US / 78 mpg IMP

The car appeared to glide with less retardation in speed compared to normal.

Just need some white insulation tape now to replace the green!
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Old 05-12-2018, 11:20 AM   #23 (permalink)
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Location: Coastal Southern California
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Black and Green - '98 Honda Civic DX Coupe
Team Honda
90 day: 59.41 mpg (US)

Black and Red - '00 Nashbar Custom built eBike
90 day: 3671.43 mpg (US)
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Quote:
Originally Posted by cr45 View Post
... Just need some white insulation tape now to replace the green!
Nice updates. Instead of tape, you might make a filler plate out of a white or gray plastic, prime it, and paint it an OEM white if you want maximum stealth. Alternately, a black plate to look like trim. There are examples of the builds already on EM. Search top left.

Did you get the lithium? How is it going?
__________________


See my car's mod & maintenance thread and my electric bicycle's thread for ongoing projects. I will rebuild Black and Green over decades as parts die, until it becomes a different car of roughly the same shape and color. My minimum fuel economy goal is 55 mpg while averaging posted speed limits. I generally top 60 mpg. See also my Honda manual transmission specs thread.

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Old 05-13-2018, 05:43 PM   #24 (permalink)
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New Absolute best mpg - 76.44 US mpg

Noticed there was next to no wind this evening and decided to take the car on a 22 mile circular route - non stop.

Used pulse and glide and a 42 mph top speed.

Engine was idling during glides.

Parked up on 76.44 mpg US / 91.8 mpg IMP / 3.077 lit/100 km

This is equivalent to a diesel doing 2.797 lit/100 km from both a thermal efficiency and a CO2 point of view.

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