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Old 10-04-2020, 03:20 AM   #129 (permalink)
M_a_t_t
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Join Date: Nov 2015
Location: Indiana
Posts: 527

The Van - '95 Chevy Astro Cl
Team Chevy
90 day: 11.25 mpg (US)

The new bike - '17 Kawasaki Versys X 300 abs
Motorcycle
90 day: 64.78 mpg (US)

The Mercury - '95 Mercury Tracer Trio
Team Ford
90 day: 35.72 mpg (US)
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Quote:
Originally Posted by JulianEdgar View Post
2.3 percent throttle variation? Seems a little high.

I didn't bother using the throttle stop after the first few tests because I could manually hold the throttle to 1 per cent (watching the live TPS percentage readout on my Motec dash) eg 20-21, 20, 20, 19, 20, 20, 20, 21 (etc).

One thing that I have learned though is that you must enter the test straight at dead-on the same speed and then move to your throttle stop position. In my case I enter at exactly 100 km/h (there's a tree I sight against) and then go to throttle-stop position, which might then raise or lower that speed by the end of the straight, depending on the aero changes.

But best test is windows open / windows closed - then at least you know you're measuring real stuff.
I thought the 2.3% seemed high as well, but thats what the numbers say .
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My herd includes:
1973 Fiat 124 Special
1975 Honda Civic CVCC 4spd
1981 Kawasaki KZ750E
1981 Kawasaki KZ650 CSR
1983 Kawasaki KZ1100-A3
1986 Nissan 300zx Turbo 5 spd
1995 Chevy Astro RWD
1995 Mercury Tracer
2004 Chevy Astro AWD
2017 Kawasaki VersysX 300

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