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  #7 (permalink)  
Fri, Sep 18th, 2009, 07:11 am
bwilson4web bwilson4web is offline  
 
Wonderful!

Get me the data and I'll add it to the chart.

This is not direction, just a suggestion but my typical testing protocol:
  • warm-up - it takes about 20 minutes to include tires and transmission
  • get up to speed holding cruise control - let everything settle out
  • reset trip-meter - starts the 'run'
  • ~10 miles - long enough the trip meter is stable
  • record results - or remember
  • pull-off and turn around
  • same protocol in reverse direction
  • average the two runs
It isn't a perfect protocol but it is 'good enough' for our purposes. <GRINS>

FYI, I like to map speeds from 15-20 mph up to 80 mph for my whole vehicle charts. Then I also like to do a series of 'hill climb' tests. But these are very sophisticated techniques needed for vehicle modeling.

Bob Wilson
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