If on a Mustang dyno i was 450 rwhp and 500 rwtq and just for practical purposes a dynojet dynos 6-10 percent higher. What dyno gives you a better picture of what your true hp and tq would be?

 

Go with the numbers you like the best.

 

The answer is Mustang. I have used these each hundreds of times and can tell you that the Mustang is a better more consistent dyno.

 

The trap speed at the track is the only dyno figure you'll need. James

 

Definitely agree there but still interested in what dyno reading is more accurate Only because i get asked this question so often

 

Dyno numbers don't mean much by themselves other than when you are making runs comparing back to that dyno and looking for the best combo. This may not be done all in one day.

 

I think most people dyno on a Dynojet. Dynojet has recently come out with a new dyno similiar to Mustang Dyno.

Whatever brand and model of dyno you tune on, stick with the same one and just use the corrected numbers to compare changes. The numbers are kind of meaningless anyways except on the dyno as your hp output will vary quite a bit depending on temperature and pressure.

You also need to compare corrected track times to really compare ET's with someone else.

 

Please dont take this the wrong way, but your information is 100% wrong. Being the fact that I was the US Dynojet Dynamometer Marketing and Sales Manager for almost 4 years, I can tell you that the Mustang Dyno is by far one of the most inferior dyno's out there. It was assembled with cheap components, and horrible tolerances.

Mark, (The old owner of Mustang) was an idiot, and had no clue which way was up half the time. I honestly dont know if he still owns the company or not.. Hopefully, he sold it to a more compitent person. One of the best "Tuning" dyno's out there was actually the Superflow Dyno. If I had to make a choice between the Dynojet or Mustang, it would be the Dynojet all day long.

I personally have dis-assembled both the Mustang and Dynojet dyno all the way down to the last bolt. To include the software/hardware systems.

*EDIT*
Heres a few facts for you.

To this date i'm pretty sure the Dynojet Dyno is still the official dyno of NASCAR (Almost 10 years now)
EVERY one of the top 10 NASCAR teams has a Dynojet Dyno.
Dale Sr had (5) Dynojet Dyno's when he passed. He wouldnt run a car unless it had been on the Dyno first.
9 out of 10 magazines run the Dynojet Dyno
All American TV shows that use a dyno, use the Dynojet dyno.
Every American Automotive manufacturer owns a Dynojet dyno. (GM, Ford, Dodge, etc etc)
Harley Davidson owns more Dynojet Dyno's than any other company out there.

 

I agree with Jeff - DynoJet, with load control, is the best bet going.



Charlie

 

Wrong, the dynojet has proven over the years to give incorrect and bloated values and the proof is dynojet has always bad mouthed the Mustang brand and then comes out with a new model that does load bearing like Mustang always has.

Anyone thinking a non load bearing dyno with just a drum was a real chassis dyno needs to lean why a controlled load is required for closer to real results.

Tuners like dynojet because it gives incorrect higher results

 

Do you have any idea how many years ago Dynojet came out with a load control dyno??

Better yet, Do you have ANY clue as to what your talking about? Cause based off of what you are saying you are calling the nations #1 racing teams idiots cause they use a Dynojet dyno and NOT a mustang dyno..

Look, I wont get into Dyno's and their accuracy. But I can tell you this, the mustang Dyno is BY FAR one of the most pathetic dyno's on the market today.
If you knew 10% of what you should know about dyno's, you would know that.

Let me guess, you were one of Marks little buddies that used to drive around with him in his little mid 80's "Beat to hell" BMW, doing everything he could at the races to try and drum up business but you guys always got kicked out of the teams trailers.

 

I've always heard good things about both. I've also always heard that for some reason Mustang's come out slightly lower, something about aerodynamics and traction or whatever...

 

Naturally the Dynojet is better, probably because

YOU WORKED FOR THEM!!!

Way to have a totally unbiased opinion.

 

If I was being bias, then I wouldnt have said this now would I??

 

Everyone has an opinion.
I have been running these Dyno's since they came on the NASCAR scene and have been doing Data acquisition long before that. I know that marketing is the reason there are so many in the NASCAR teams shops. I also know why they are the "official Dyno of NASCAR", as with most things it has nothing to do with performance of the product. The Superflow is the best out there I have used and is the one we use now. When it was between the Dynojet and the Mustang, we could find one or two more consistently with the Mustang. The first thing that had to be done to the Dynojet unit when it was delivered was to remove one of the flags so it would only measure drum rpm once per revolution because the signal was so jagged it would throw numbers all over the country when you looked at the unfiltered data. The Mustang measures this something like 137 times per. I agree that we had to replace the cheap shaft bearings and re engineer the Eddy current absorber lead cell brackets ans well as a few other things, but it made a much better unit. I was told that these things along with a lot of software changes were implemented into the factory unit. They worked with us to make a better unit where Dynojet would just say sorry that is the unit we sell.
Just my humble opinion as a day to day user of both machines!

 

Keep going guys. This is fun reading this debate!

 

Hi PUREFUN -

I recently had the opportunity to check my car on a Dyno-jet (LGM) to compare the numbers I got on a mustang dyno (Breathless Performance).

The Dyno-jet showed 374RWHP, and the Mustang showed 372RWHP.

Same car, same wheels, etc. I had replaced the stock oils in the diff and trans with redline, and the car had about 15k more miles on it (maybe a little more) when the Dyno-Jet run was made. That was the only difference.

Pretty close in my book.

I have read that the eddy-current type of dyno can be more accurate when properly set up.

Mustang = eddy-current, Dyno-Jet = enertial.

best regards -

mqqn

 

The track is the best way of measuring HP and Torque. Some cars just don't make the big power on the dyno. But pull away out on the track, I don't know why but it just happens. What I have told customers is, I have never seen two dynos racing down the straight. What I mean by that is it's a tool and should only be used as that.

Randy

 

But most ppl on the forum would rather bench race dyno charts in some bar over then get on the track and actully race or even do HPDEs.