Re: MPG Meter
From: Vanden Berg (larryvan@pclink.com)
Date: Sat 27 Mar 2004 - 23:27:57 EST
I don't have an answer for Brian, but will relate my experience on a mpg
meter used on a non-fuel injected car.
In 1982 I bought a mpg computer/meter kit from JC Penny Auto Center for
$120. I installed it myself on a 1980 Honda Civic. The key components
were a computer, a turbine fuel meter installed in the gas line to the
carb, and magnets/sensor to install on front drive half shaft. Once
that was installed and hooked up you calibrated both the distance and
fuel separately by entering a calibration factor. For distance you
drive a measured distance like 10 miles, then enter the distance and
press the CALIBRATE key. For fuel you go through one complete tank of
fuel and then enter the fuel used. Its takes a few tanks of fuel to
calibrate and you must fill tank to the same point each time.
Once calibrated it was very accurate within 0.2% or so. I used it for
about 100,000 miles. It would give you various functions that were
computations of distance/speed/fuel usage. It would give you the
instaneous mpg as well as the average since you reset it (at beginning
of tank usually). This was a Civic with a 200,000 mile mpg average of
36 mpg (EPA 36/49). Hard acceleration :) would give a mpg of around
16. Coasting at highway speed would give you a mpg of around 200. The
car outlasted the computer. The engine outlasted the car
body.....terminal rust.
It would not work for a FI car without the return fuel meter and a
computation to subtract that amount from the fuel going to the
injectors. That is all Brian is asking for. It is amazing how far off
some of these threads can get.
Larry
91 405 DL
86 505S TD SW
--------------------------------------------------------
Brian Holm wrote:
>But I want to know actual mpg.
>
>I can't imagine the electronic circuitry being too complicated, with inputs
>from two fuel flow sensors and a speed sensor. Obviously it would have to
>be calibrated in actual use.
>
>Brian Holm
>Parts for Peugeots
>
>
>
------------------------ Yahoo! Groups Sponsor ---------------------~-->
Yahoo! Autos. Everything you need to know about buying
or selling a car. FREE Quotes, 360° Tours, Research,
Blue Book, Compare Vehicles, Buy Used
http://us.click.yahoo.com/kEZsdA/bwnGAA/YiGOAA/4jLplB/TM
---------------------------------------------------------------------~->
Recommended format for your email subject lines:
Model # [Model Letters] Year Subject
Examples:
505 88 V6 Mileage
405 Mi16 89 Ignition Coil source?
This archive was generated by hypermail 2.1.4 : Sat 27 Mar 2004 - 23:22:56 EST