View Single Post
Old 12-11-2008, 01:10 AM   #15 (permalink)
Concrete's Avatar
Join Date: Jun 2008
Location: Kansas
Posts: 177

The Truck - '00 Chevy S10 Extended Cab
90 day: 22.47 mpg (US)
Thanks: 0
Thanked 22 Times in 7 Posts
determining ball park parasitic loads is not too hard with instrumentation

I just pulled the serpentine and watched the scan gauge
(I really love that thing)

~.1 GPH difference without any belt (from 900-3000 RPM pretty flat)
~.1 GPH difference A/C on and off (idle)
~.12 GPH difference steering wheel still to loaded against the stops (idle)
~.01 GPH difference head lights on and off (maybe)

I think the power steering pump should watch it's back
it is not worth .12 gph to me

for the hyper-miler with manual everything & EOC this may be insignificant
for my truck (and probably the average vehicle) this is significant
during the test my unloaded consumption was ~.46 GPH
parasitic load can be 70% of my idle load and 10-20% of my cruise load

a parasitic input might help folks determine what their "conveniences" cost

just a thought
Start where you are - Use what you have - Do what you can.
  Reply With Quote