VW admits to EPA that diesel equipped cars will only meet emissions when tested - Page 7 - Jeep Garage - Jeep Forum

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  #73  
Old 10-15-2015, 12:12 AM
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Re: VW admits to EPA that diesel equipped cars will only meet emissions when tested

Recently a privately run investigation showed a fwd Jetta TDI dyno tested was down 35 ft/lbs of tq when run on a two wheel dyno. Yet when run on a four wheel dyno, with the rollers all connected, all wheels turning at same speed, made more torque. EPA test is most likely done using a two wheel dyno.

Horsepower was within 2 hp two wheel or four wheel dyno but torque was very different.

When run on a two wheel dyno the ABS light comes on. Possibly that was an input to use and to revert all the timing tables etc.


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  #74  
Old 10-17-2015, 01:09 PM
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Re: VW admits to EPA that diesel equipped cars will only meet emissions when tested

The first ones to do it were the goof-balls from the Fast Lane Car. However, they somehow don't really know what they are doing despite having a pretty good web series. A few methodological issue to say the least.



So Consumer Reports did their own version which is much better:

Consumer Reports Tests VW Diesel Fuel Economy and Performance
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