Not necessarily. The 294 was your power BEFORE he started tuning. He was then able to get it up to 326 WITH tuning. Which is probably about right to gain about 30whp on a tune with your mods.

 

Uh, no. It's more of a percentage than a static difference. A stock Civic DX won't make 50whp on a MD then go make 100whp on a Dynojet.

 

go get a trap speed and weigh your car

 

Based on your comments through this thread, your car should make like 450-500whp on a dynojet. That's what you want to hear, right?

Now, back to reality. Unless you are running C16 and 30psi peak, I believe this mustang to read quite high. 305-320whp would be a good number to expect on your mods running 23-24psi peak. And yes, while the car is getting tuned you will see gains of 30+whp, THAT IS THE POINT.

 

I talked to a few different people who dynoed on both a mustang and a dynojet.
One car pulled 330 on a mustang and 370dynojet.

Look at the U2SLO's car, the pump gas monster tuned and built by DB. That car made 580 on buschur's mustang, then went and pulled 620 on a dynojet by AL from dynoflash.

 

Ok, and?

1) Those are just a few cases, and we've already said MULTIPLE TIMES that it depends on whether the MD is manipulated or not. It's as if you're completely ignoring everything that has been said. You "talked to a few different people," whereas we are referring to HUNDREDS of examples right here on this site over the last 4 years. A proper, unmolested MD (like Buschur's) will read much lower than a Dynojet. Others, such as the CFT dyno in Orlando, read just like Dynojets due to changes made either to the settings or the roller weights.

2) 370 vs 330 = 12%. 620 vs 580 = 7%. Those examples alone should show you it's not a constant.

 

If people don't understand this yet, then they never will.

 

In support of some of the above posts:

Our shop went from DJ to MD last year and with proper calibration, same location, same tuner, same fuel, same car and no BS manipulations etc, we average about 12% lower on the MD with a range of about 10%-15%. We also have a sound proof dyno-cell and hurricane force winds that are carefully controlled for repeatability.

I chuckle when I see shops that have their dyno, service, office, waiting room, parts display, crapper, etc all in the same room. Esp when I see minimal ventilation and little regard for effects of airflow to the motor and cooling system. Not trying to knock startup or lower budget shops but just making the observation that even identical dynos will read differently due to their physical environment etc.

BTW, most DJs are inertia dynos. That means that lighter wheels/tires, rotors, clutch/flywheel, etc will increase the whp even tho no more power is actually produced, it is simply spinning up a lighter mass.

MD can also do simulated 1/4 mile runs (see bottom link in sig, and yes, those straps were tight at the start of the run. Dont flame...) with surprisingly accurate results compared to real world racing. Of course, the settings for weight, drag, etc must be entered appropriately otherwise the results will be skewed. Also, MD require that the operator routinely verifies his base calibrations with the proper methods otherwise his numbers will be off too.

FWIW, NASCAR uses a Dynojet for their testing of controlled power cars such as in their Grand-Am series. Their point is not that it is more accurate of true power but simply a repeatable method to get comparative numbers between cars.

 

I thought the Mustang dynos read near as low as, for example, a Dyno Dynamics dyno.

 

If all 3 dynos are untouched. Unmolested dynos it will be from highest to lowest DJ, DD, then MD

 

Who tuned/dyno your car???

 

(bcampbell782):

if your from vegas, theres only one AWD DYNO there its DOUGS D.

 

...it's just a number...

Trap speeds are the better indicator of power.