Someone I know had their car tuned up and dynoed (2WD dynojet with one roller) at some speed shop here, then they came to my shop's dyno, and lost 200HP. Suddenly, i'm getting told that our dyno is **** and inaccurate.

Isn't it funny how someone can go to get their car dyno'd at 2 different places, and then say that the dyno which produced higher numbers was the more accurate dyno?

Yet we have had brand new cars come in, in stock condition, dyno'd on our machine (european and japanese cars), and the figures that come out are pretty much dead on with the factory spec. We use a 4WD HPI dyno with 4 rollers (2 at the front, and 2 at the rear). It also has load balancing, which helps a lot when tuning.

Also, how can people say that "oh, add 15-20% and that's ur crank HP" - drag loss is not constant, but linear as you go up the revs. And its not 15-20% for every car. Not only that, but if you have funky camber settings, then you have even more loss. I don't know if dynojets can measure drag loss (i'm guessing not) but ours can.

Maybe someone can elaborate on this subject for me. Kids who don't really know much come up to me and say "dynojet is the best dyno in the world" - but what do they really know?

 

dynos suck (period) unless you need them i guess a bumpo for the evo