I have heard both sides saying that mustang dyno's read high and low. Would love too know because my car is getting put on a mustang dyno monday afternoon. I just don't wanna be over excited or disappointed any input would be great

 

Both dynos are accurate, one just measures HP differently. Mustang dynos replicate road conditions so they always will dyno lower. Google it.

 

Several years ago Hot Rod magazine took a HP challenged Mustang to 4 different dynos. IIRC the Mustang read about 5% lower than the DynoJet. As noted above, different methods, different results.

 

Trust me i have but there are so many biased opinions that its impossible too tell whose speaking the truth. For every 100 people that say a mustang dyno gives lower numbers there's 100 more saying the opposite. I hope solomon sends me a tune by monday morning. If not ill be wasting my dyno time.

 

Truthfully dyno numbers are just a tuning tool. If you want to use your dyno #s as bragging rights, step up to a Dynojet and slip the dyno operator a $20.

 

Unless you mess with the weather station, a dynojet is the most consistent and repeatable dyno out there, no operator inputs to mess with and skew the numbers, no absorption units to get heat soak and change the numbers. If you're looking for comparison numbers to other people a dynojet would be best for people in different locations.

 

Thanks for the feedback fellas greatly appreciated.

 

I agree the dyno is just a tuning device. the operator can set the loads to what ever they like.

 

I've never understood/accepted this. There are standards that they dyno is supposed to measure - if it says "CF: SAE" I take that to mean "Correction Factor: SAE" and it should be targetting one of the SAE standards (of which there are a few).

You can lie to the dyno about elevation and humidity and so on, but that wouldn't be the SAE protocol. So a Mustang or a Dynojet both claiming to measure SAE J1349 should produce the same number, within a margin of error, for the same car or at least one of them is wrong...

I've often heard that "Mustangs dyno lower than Dynojet", but like I said, if they're both proporting to produce a result that's SAE J1349 or J2723, then one would be wrong.

 

I suspect that what the dyno manufacturers build into their software is the "correction" formula of J1349, not the entire J1349 certification procedure.