[blykins]

They are not "inaccurate", but the different brands show different results. A DTS will usually show lower than a Superflow. A Stuska will usually show lower than a Superflow.

On a rear wheel setup, a Mustang brand will show lower than a Dynojet.

I have fits because of the various dyno shoot-offs on the forum. As others have said, the only real true indicator of how much horsepower you have is to take it to the strip. Otherwise, I can literally dyno an engine on the dyno that I use, then take it 50 miles down the road and get a bigger number. It's not that guys are falsifying the numbers because they want to sell horsepower....well, maybe a select few are, but different brands show different results.

So, to pay big money to ship someone headers and sidepipes to use on their dyno just to get a true indication of what the engine is doing through the exhaust is really futile. Say you dyno it and get 550 hp, then take it to another dyno and get 500. What was the use?

You don't race flow benches and you don't race dynos....both are just really good tools for coming up with a standard, then seeing what differentials you get by trying different things.