Mustang Dyno vs Dyno Jet
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Old November 28th, 2007, 05:10 PM   #1
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Mustang Dyno vs Dyno Jet


Just wondering if theres any difference in horsepower rating between a mustang dyno and a dyno jet. I have heard that a mustang dyno is better for tuning because you can almost simulate everyday driving rather then the dyno jets wide open throttle only.
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Old November 28th, 2007, 06:15 PM   #2
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every dyno is different i will try and look it up
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Old November 28th, 2007, 06:19 PM   #3
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from what i get from this there saying that the mustang is more of a real world rwhp number and the dyno jet is more close to your flywheel numbers....im sure someone else will chime in

From what I am told the Mustang dyno gives you a "true" or real world rwhp... i.e. my '00 FRC put down 307 rwhp stock, using 12% drivetrain loss and that is 348 flywheel hp (factory rated 345 hp)...My '02 Z06, on the same Mustang dyno, put down 348 rwhp stock, divide that by 12%, using the same 12% drivetrain loss is 395 fwhp (factory rated at 405 hp)


Again...285 rwhp using 12% drivetrain loss gives 324 fwhp, factory rated 320 hp...If you use the DynoJet hp, then you get the following...315 rwhp with 12% drivetrain loss gives 358 fwhp, factory rated 320 hp...So you see, it sound great to think these engines are putting out this kind of power, but it's just not as realistic of a number as you get with the Mustang Dyno...
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Old November 28th, 2007, 06:24 PM   #4
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every dyno usually varies some even if they are the same model.
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Old November 28th, 2007, 06:27 PM   #5
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yeah thats what i heard too
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Old November 28th, 2007, 07:16 PM   #6
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Chassis dynos are tuning tools and that is it. You can run your car on any chassis dyno and make simple change like repositioning the car on the rollers or change from slicks to street radials and see a horsepower change.
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Old November 28th, 2007, 07:20 PM   #7
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We have a Dyno Jet at the shop

pretty much different setups, they both measure torque and do the HP caculation automaticlly from the torque curve
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Old November 28th, 2007, 08:23 PM   #8
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to give you an idea on the number differences, the following is taken straight from the C&L Performance website

"We have received a report from a "concerned customer" who informed us that some people believe that the dyno chart at the bottom of this page has incorrect information. Apparently, people on internet web forums somehow believe that we "do not know what we are talking about" due to the fact that we state that a stock 2003-2004 Cobra made "only" 316 rear wheel horsepower on a MUSTANG dyno. Since "everyone knows that these cars make at least 360 rear wheel horsepower stock" and these people must be ignoring the first three charts on the page, we felt it necessary to explain. The first three charts on this page were tested using DYNOJET dynos, which is an inertia style dyno. The SAE corrected numbers that it delivers are what most people use when trying to compare horsepower numbers "on the internet", because it is the most commonly used type of dyno. The chart at the bottom of the page was generated from testing on a MUSTANG dynamometer, which is a load bearing dyno, and these dynos will typically read about 14% lower than the Dynojet numbers that most people are used to seeing.

If you take the baseline value that is mentioned (316) and multiply it by 1.14, you will 'amazingly' come up with a value of 360.24 HP as the "stock" adjusted value. In addition to this, if you take the peak "after" horsepower reading of 372.9 (which was measured with an exhaust upgrade and our air intake assembly) and multiply it by 1.14, you will achieve a value of 425.1 HP. If you look at the second dyno chart on this page, you will find that another vehicle with the similar modifications (exhaust upgrade and our air intake) just so happened to make 426.44 HP on a Dynojet, which is only 1.3 HP off from this adjusted value. Even though the base values are lower when using a Mustang brand dyno, you will notice that the improvement of 22 rear wheel horsepower that was measured when testing our intake assembly was not substantially different than the gains shown in the first two dyno tests on this page. If this doesn't make sense to you, then we strongly suggest that you do not "contribute" to the education of people in your community on the internet message boards. The caption under the last dyno chart explicitly states that this vehicle was tested on a Mustang dyno. We hope that this information will clear any confusion that might have existed in the mind of any internet "experts" who were unaware that different types of dynos exist and that they can actually deliver different horsepower readings."

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Old November 28th, 2007, 08:44 PM   #9
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just remove motor and do an engine dyno..then do drivetrain loss math...and voila...
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Old November 28th, 2007, 09:13 PM   #10
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Originally Posted by Devine View Post
to give you an idea on the number differences, the following is taken straight from the C&L Performance website

"We have received a report from a "concerned customer" who informed us that some people believe that the dyno chart at the bottom of this page has incorrect information. Apparently, people on internet web forums somehow believe that we "do not know what we are talking about" due to the fact that we state that a stock 2003-2004 Cobra made "only" 316 rear wheel horsepower on a MUSTANG dyno. Since "everyone knows that these cars make at least 360 rear wheel horsepower stock" and these people must be ignoring the first three charts on the page, we felt it necessary to explain. The first three charts on this page were tested using DYNOJET dynos, which is an inertia style dyno. The SAE corrected numbers that it delivers are what most people use when trying to compare horsepower numbers "on the internet", because it is the most commonly used type of dyno. The chart at the bottom of the page was generated from testing on a MUSTANG dynamometer, which is a load bearing dyno, and these dynos will typically read about 14% lower than the Dynojet numbers that most people are used to seeing.

If you take the baseline value that is mentioned (316) and multiply it by 1.14, you will 'amazingly' come up with a value of 360.24 HP as the "stock" adjusted value. In addition to this, if you take the peak "after" horsepower reading of 372.9 (which was measured with an exhaust upgrade and our air intake assembly) and multiply it by 1.14, you will achieve a value of 425.1 HP. If you look at the second dyno chart on this page, you will find that another vehicle with the similar modifications (exhaust upgrade and our air intake) just so happened to make 426.44 HP on a Dynojet, which is only 1.3 HP off from this adjusted value. Even though the base values are lower when using a Mustang brand dyno, you will notice that the improvement of 22 rear wheel horsepower that was measured when testing our intake assembly was not substantially different than the gains shown in the first two dyno tests on this page. If this doesn't make sense to you, then we strongly suggest that you do not "contribute" to the education of people in your community on the internet message boards. The caption under the last dyno chart explicitly states that this vehicle was tested on a Mustang dyno. We hope that this information will clear any confusion that might have existed in the mind of any internet "experts" who were unaware that different types of dynos exist and that they can actually deliver different horsepower readings."

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Its about time one of these companies goes off on all of the internet experts out there.
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Old November 29th, 2007, 05:01 PM   #11
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Thanks Devine you answered my question perfectly. I put down 389hp on a mustang dyno and a guy at my work put down 460hp on a dyno jet and he keeps saying how much more power he has then me, but according to this info were prety close to even on power.
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Old November 30th, 2007, 03:23 AM   #12
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Originally Posted by BLOWN89 View Post
Thanks Devine you answered my question perfectly. I put down 389hp on a mustang dyno and a guy at my work put down 460hp on a dyno jet and he keeps saying how much more power he has then me, but according to this info were prety close to even on power.
Tell him to meet you at the track. We race cars, not dynos.
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Old November 30th, 2007, 12:19 PM   #13
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Well are track is closed down for the winter so I have been trying to get him to meet up and race but every time I call out he seems to never show I thought those 03-04 cobra guys werent suppose to be scared of anything.
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Old November 30th, 2007, 12:42 PM   #14
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Originally Posted by BLOWN89 View Post
Well are track is closed down for the winter so I have been trying to get him to meet up and race but every time I call out he seems to never show I thought those 03-04 cobra guys werent suppose to be scared of anything.
03-04 cobra owners have alot to fear out there. They just dont know it.
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Old November 30th, 2007, 01:27 PM   #15
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1989 mustang LX
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if thats your time i think you will beat him

depends on how well he drives i guess...
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Old November 30th, 2007, 01:48 PM   #16
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Originally Posted by White Thunder View Post
1989 mustang LX
12.00 @120.70

if thats your time i think you will beat him

depends on how well he drives i guess...
450rwhp in an 03 cobra at a conservative 3700lbs, with stock IRS, 3.55 gear, and a SEMI okay driver is mid 12s on DRs @3000ft alt. Ask me how i know.. If hes going 12ohs at 120.. he doesnt need to worry if the cobra is making similar power. 03-04s are tanks compared to foxes.
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Old December 1st, 2007, 12:16 AM   #17
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Originally Posted by Darrell View Post
Tell him to meet you at the track. We race cars, not dynos.
this is great. I'm blown89's brother in law so I have been in on this BSing ring so I'm so glad to hear this quote. Old boy with the cobra needs to put on his big boy pants and take the beating he has coming to him.
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Old December 1st, 2007, 03:13 AM   #18
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Originally Posted by BLOWN89 View Post
Thanks Devine you answered my question perfectly. I put down 389hp on a mustang dyno and a guy at my work put down 460hp on a dyno jet and he keeps saying how much more power he has then me, but according to this info were prety close to even on power.
Call his ass out then, Race each other.
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Old December 1st, 2007, 10:34 PM   #19
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naked fist fight...that always solves it...


make sure you're drunk...evens out everything...
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