Another Custom Dyno Day Nov 12-13

ASD said:

.... The industry standard is the Dynojet for the cobras and if you don't believe me post on all the other forums and find out.

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Probably the main reason is Dynojets reproduce consistent numbers. Mustang dynos have too many variables and if they aren't entered correctly the numbers are worthless. You can make a car produce any hp # you want on a Mustang dyno.

ricksgt said:

......or maybe people like the higher numbers.....

Rick

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Hmmm, interesting statement. There has been many claims that a Dynojet produces higher numbers. This may be true providing 100% accurate variables are being plugged into the Mustang dyno software. After looking at many local dyno sheets compared from Mustang dyno to Dynojet I have not seen any results in which the Dynojet # was higher. They were either close to equal or the Mustang dyno showed much higher numbers.

ricksgt said:

Great links......most shops use Dynojets, I dont know why, maybe they dont cost as much, maybe they are just well known, or maybe people like the higher numbers, its all up to the person who buys it.

Rick

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There are several factors at play when it comes to deciding which dyno to purchase for a shop. I may be opening a shop in nine months or so in the Beaverton area, so rest assured that I have thoroughly researched both styles. Talking to shop owners who have used both dynos, many will say that the software that comes with a dynojet package is more user-friendly. In addition, the dynojets are usually cheaper. Maintaining both styles costs roughly the same. Some tuners argue that eddie-current style dynos (mustang dynos) load vehicles more realistically, based upon more accurate weight and resistance figures, yielding a better tune when the vehicle is on the street. This is also the reason that Mustang Dyno promotes all their peripheral crap that you can add to their dynos (weather station, a tree for drag racing, etc.). From what I have seen, nobody uses MD dynos to simulate quarter mile pulls in the middle of winter! From what I gather, customers do prefer to see the higher numbers provided by dynojets. Alan is correct in saying that one could argue for days about which dyno is better- yes, it is always the choice of the purchaser. Overall, I would like to say that across the nation, MD dynos are catching on, especially at larger facilities that can afford the higher initial cost. Many states employ mustang dynos to conduct emissions testing, as the parent company of MD started out manufacturing sensors, some of which are now used to conduct road-side emissions tests on unsuspecting motorists. If Oregon ever has the budget to adopt such road-side sensors, I suggest someone firebomb their manufacturing facility. Many of us will be feverishly detuning our cars and swapping out mid-pipes otherwise!

Jon said:

Probably the main reason is Dynojets reproduce consistent numbers. Mustang dynos have too many variables and if they aren't entered correctly the numbers are worthless. You can make a car produce any hp # you want on a Mustang dyno.

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Very true. Mustang Dyno stresses that training all employees to properly use the dyno is key- too many technicians have no clue about how to properly enter settings in the software... or they simply don't bother to keep things constant between runs.

Jon said:

Hmmm, interesting statement. There has been many claims that a Dynojet produces higher numbers. This may be true providing 100% accurate variables are being plugged into the Mustang dyno software. After looking at many local dyno sheets compared from Mustang dyno to Dynojet I have not seen any results in which the Dynojet # was higher. They were either close to equal or the Mustang dyno showed much higher numbers.

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Interesting. I have seen discrepancies, though I was never able to see atmospheric conditions in the comparissons I saw. MD salesman warn many shop owners that they should be prepared to see slightly lower numbers from a given vehicle on a MD. You are right though- the tech could rectify that by manipulating some settings!

So then a MD is only as good as the Tech pushing the buttons.

I run on both kinds, lack of tech was evident for both kinds.

The dyno I prefer is the one that bolts to the axle with tires off, no BS tire slip or air pressure issue to fudge numbers