Originally Posted by ShinyShoe
That's genius. You can run the compressor all the time... Doesn't need to be a lab only solution...
Except in the UK, at least, the spec is grams per Km driven. So don't matter how much clean air you blow past... You will still have produced same number of grams per km.
And how much more fuel do you burn to run the compressor?
The tests were, I'm sure designed with good intentions, and sure enough if I keep my trusty diesel burning Mondeo below 55MPH on flattish country roads it will happily do 67 to the gallon, even if I have 4 bikes strapped to the roof. (nearer 75 without!). Then if I dare to go up to 62 (oooooh, outside the extra urban drive cycle
) it drops to about 55mpg. Show it a motorway at a steady 70 and I'm barely pulling 47mpg. Add a Rib trailer and I might see 33 on a good day!
Same with my good lady's highly boosted 1.4 petrol. Keep it below 50mph - it runs on air. show it a motorway & watch the fuel gauge drop......
Same with crash tests. If you do anything other than hit a 200t concrete block perfectly perpendicularly or a big lump of aluminium honecom at exactly 40% offset at whatever kph and are of standard body size / weight and have your seat in the mid position....etc etc you are not guaranteed to walk away, no matter how many stars the tests give the cars.
What would be better, especially as everything has lots of computers is a system where the makers do what they perceive to tbe a "real world" fuel economy etc test. This would tide them over until the data from the cars is then downloaded (could be a legal thing for dealers & MoT stations and then uploaded to a cerntral database with monthy real world reporting. The incentive to get a realistic number for the initial test would be there becuase after the first almightly lie they are goign to find it progressively more difficult to sell the next new model as their reputation slips.....