Dyno comparisions
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I hear everyday some wants to hit some certain
peak power number from a roller dyno under uncontrolled weather
conditions. For one you cannot compare dyno numbers from one
shop to another especially if they are located in different states.
Here is a discussion on a 13% difference in dynos in the same city: http://www.modularrevolution.com/forums/showthread.php?t=17144
Here is a good discussion showing the differences between SAE and STD and how some numbers get inflated in colder weather:
Then consider that the dyno can also be "tweeked" by the operator to produce higher numbers, one should finally realize that a dyno run is a tool for tuning and tweeking the car and little more. Here is a thread showing what I considered to be inflated numbers and some interesting comments from an experienced dyno tuner: http://www.modularfords.com/forums/showthread.php?t=143782
Here is another very good thread on this subject with good input from experienced tuners: http://forums.corral.net/forums/showthread.php?t=1183181
Here is an article published in Popular Hot Rodding showing how a good tuner can "tweek" the numbers: http://www.popularhotrodding.com/features/0612phr_dyno_accuracy_testing/index.html |