I've read a couple of times that different dynols will yield very different WHP #'s Which one will net the most realistic figure and what are the facts for this? Let the debate begin.

 

dyno-jet read lower hp like 10% i believe

 

A chassis dynamometer is kinda like a treadmill for your car. Yeah, everyone knows that...

An inertial dyno rolls a great big drum, you floor it & the dyno measures how the drum accelerates. Knowing the mass of that drum, you calculate the torque.

A brake dyno has a big brake on that drum, so you floor it & they operate the brake so it doesn't accelerate. The brake is able to measure how much torque it's applying.

Both methods are valid, but they're different. Understanding the difference is what's gonna make this thread interesting...

 

An engine dyno would warrant the closest numbers to actual HP and Tq produced, since its measure at the crank.

Rich

 

Then what it a mustang dyno???

 

Inertial dynos like the dynojet will usually yield lower numbers because when doing calculations to arrive at torque, only the rotating mass of the drum is considered and nothing on the car itself. The numbers can therefore differ from actual depending on what gear you're doing the dyno pull in, how much power your engine makes, as well as how much the drum weighs.

 

So in keeping with the topic, which is the most common dyno, and like someone said how does a mustang dyno work.