mustang dyno vs dynojet
mustang dyno vs dynojet 
TECH Enthusiast
Joined: Sep 2004
Posts: 564
Likes: 0
From: Omaha, NE
From my personal experiance, Dynojets read from 1.1 to 1.15 times higher then our Mustang dyno. Most often Dynojets seem to read higher then other brands but there are always acceptions to this rule. Why Dynojets read higher does not seem to be known (trade secret), possibly just the way their company computed HP/TQ for an inertia only dyno, but these higher readings seem to have benefitted the brand which potentially was considered in their equation. A Mustang dynos use a combination of inertia and load which technically should increase the readings. Dynojet has recently added the measureable load control option too, which is of additional value for testing and tuning.
There is much confusion by dyno customers and operators when it comes to correction factors for elevation and atmospheric conditions. Not using correction factors or the wrong ones will cause dramatic differences in dyno readings, skewing the results from hour to hour, day to day on a given dyno or from dyno to dyno, thus limiting the real value of dyno testing and tuning. Today the dyno profession is like the automotive industry was in the 60s, there were no agreed to standards and proceedures for the measurement and advertisement of HP and TQ. Like then, trying to compare readings from brand to brand was most difficult. However, now that most brands are getting into computerized load control, it is possible that we could have a standardized proceedure, such as using a controlled RPM acceleration sweep rate of 300 RPM/second for HP/TQ measurements. With that, getting the correction factors correct and getting each dyno company's engineers to use a certified physics manual stating Sir Isaac Newton's laws could help solve a big problem.
There is much confusion by dyno customers and operators when it comes to correction factors for elevation and atmospheric conditions. Not using correction factors or the wrong ones will cause dramatic differences in dyno readings, skewing the results from hour to hour, day to day on a given dyno or from dyno to dyno, thus limiting the real value of dyno testing and tuning. Today the dyno profession is like the automotive industry was in the 60s, there were no agreed to standards and proceedures for the measurement and advertisement of HP and TQ. Like then, trying to compare readings from brand to brand was most difficult. However, now that most brands are getting into computerized load control, it is possible that we could have a standardized proceedure, such as using a controlled RPM acceleration sweep rate of 300 RPM/second for HP/TQ measurements. With that, getting the correction factors correct and getting each dyno company's engineers to use a certified physics manual stating Sir Isaac Newton's laws could help solve a big problem.
Hey Dynocar... I think this should be a sticky as it keeps coming up. What do the Mods think? 
Originally Posted by dynocar
From my personal experiance, Dynojets read from 1.1 to 1.15 times higher then our Mustang dyno. Most often Dynojets seem to read higher then other brands but there are always acceptions to this rule. Why Dynojets read higher does not seem to be known (trade secret), possibly just the way their company computed HP/TQ for an inertia only dyno, but these higher readings seem to have benefitted the brand which potentially was considered in their equation. A Mustang dynos use a combination of inertia and load which technically should increase the readings. Dynojet has recently added the measureable load control option too, which is of additional value for testing and tuning.
There is much confusion by dyno customers and operators when it comes to correction factors for elevation and atmospheric conditions. Not using correction factors or the wrong ones will cause dramatic differences in dyno readings, skewing the results from hour to hour, day to day on a given dyno or from dyno to dyno, thus limiting the real value of dyno testing and tuning. Today the dyno profession is like the automotive industry was in the 60s, there were no agreed to standards and proceedures for the measurement and advertisement of HP and TQ. Like then, trying to compare readings from brand to brand was most difficult. However, now that most brands are getting into computerized load control, it is possible that we could have a standardized proceedure, such as using a controlled RPM acceleration sweep rate of 300 RPM/second for HP/TQ measurements. With that, getting the correction factors correct and getting each dyno company's engineers to use a certified physics manual stating Sir Isaac Newton's laws could help solve a big problem.
There is much confusion by dyno customers and operators when it comes to correction factors for elevation and atmospheric conditions. Not using correction factors or the wrong ones will cause dramatic differences in dyno readings, skewing the results from hour to hour, day to day on a given dyno or from dyno to dyno, thus limiting the real value of dyno testing and tuning. Today the dyno profession is like the automotive industry was in the 60s, there were no agreed to standards and proceedures for the measurement and advertisement of HP and TQ. Like then, trying to compare readings from brand to brand was most difficult. However, now that most brands are getting into computerized load control, it is possible that we could have a standardized proceedure, such as using a controlled RPM acceleration sweep rate of 300 RPM/second for HP/TQ measurements. With that, getting the correction factors correct and getting each dyno company's engineers to use a certified physics manual stating Sir Isaac Newton's laws could help solve a big problem.
Teching In
Joined: Jun 2006
Posts: 31
Likes: 0
From: Chattanooga TN
Originally Posted by camaro98z28
Please Use Search Button!
werd! there are like 10 DJ v/s MD threads if they would search. also you could google the same questions and come up with some documentation.
