I want to get dynoed my car and i have two options : MD MUSTANG and DYNOJET 248 High Speed*2. Which one is the most accurate?

 

they are both accurate in the right operators hands. It's just that the Mustang dynos tend to read lower then the dynojet dynos. So it wouldn't be wise to dyno on a Mustang and then add a part and dyno on a dynojet. It's all about consistency. Pick one where the operator seems to know what he is doing and use that same one next time.

 

They say mustang dynos are better for tuning more accurate, just something I've heard don't know if it's true or not, but it will read lower HP than a dynojet.