Dynojet vs Mustang
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From: Orlando
E550 Coupe
Dynojet vs Mustang
This little performance shop opened up across the street from my work and they have some Mustang dyno. I've mostly read about Dynojet on here (I think that's what Evosport uses) so I asked them what the difference was. They said the Mustang puts load on the car to simulate actual driving, but the Dynojet gives hypothetical numbers. The owner was out so they couldn't give me a quote, so I left and said I would come back later. When I was leaving, I noticed some other performance shop popped up across the street and they have a Dynojet. So both are available to me. Which should I run my car on and why?
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From: Woodstock, IL
His 2019 RAM Cummins Turbo Diesel Laramie; Her's 2007 ML320 CDI P3; Mine BMW R1200R
On my turbo 91 Mustang with a stand alone ECU, I have tuned on both. With the Mustang Dyno, the car drove like a stock car. Smooth, excellent fuel ratios, good solid power under all conditions etc.
On a Dynojet, there was no load. After tuning, I had horsepower numbers, but still had to drive around on the road/track to get the fuel curve under load correct.
Best I can say, if you just want to see how much power you have, use the Dynojet. It is pretty consistent from machine to machine, with repeatable results.
But, if you are tuning a vehicle and want it done right, strap down on the Mustang Dyno, load the wheels, and tune away. You will see a slightly lower HP number as compared to the Dynojet, but it will be a "truer" HP number.
Have fun!
On a Dynojet, there was no load. After tuning, I had horsepower numbers, but still had to drive around on the road/track to get the fuel curve under load correct.
Best I can say, if you just want to see how much power you have, use the Dynojet. It is pretty consistent from machine to machine, with repeatable results.
But, if you are tuning a vehicle and want it done right, strap down on the Mustang Dyno, load the wheels, and tune away. You will see a slightly lower HP number as compared to the Dynojet, but it will be a "truer" HP number.
Have fun!
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Joined: Nov 2001
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From: Scottsdale (aka The Surface of the Sun)
This last post is pretty close.
We do have a dynojet 248c. We use it as it is the most common and consistent dyno world wide. You can get a dynojet # almost anywhere and with the SAE correction, the numbers are typically within 1% regardless of elevation, location, etc.
However, for pure tunning, you do not need a mustang. It is helpful to have a load dyno for sure. You can do close to as well with a dynojet, it just takes a lot of experience.
The poster was correct in that many dynojet shops purely tune at full throttle on the dynojet then wonder why the #'s and A/F are wacky on the street under load - well, duh! lol
Also, there is no such thing as a "truer" number. All of the dyno's use a calculation to give you their interpretation of rear wheel power. Some are higher and some are lower. Some will argue for days and days that this dyno is better then that dyno, etc.
The net/net is that if you use the same dyno before and after mods, just look at the delta.
Don't know if this helps, as it is late and I am tired, but I hope so.
thanks
brad
We do have a dynojet 248c. We use it as it is the most common and consistent dyno world wide. You can get a dynojet # almost anywhere and with the SAE correction, the numbers are typically within 1% regardless of elevation, location, etc.
However, for pure tunning, you do not need a mustang. It is helpful to have a load dyno for sure. You can do close to as well with a dynojet, it just takes a lot of experience.
The poster was correct in that many dynojet shops purely tune at full throttle on the dynojet then wonder why the #'s and A/F are wacky on the street under load - well, duh! lol
Also, there is no such thing as a "truer" number. All of the dyno's use a calculation to give you their interpretation of rear wheel power. Some are higher and some are lower. Some will argue for days and days that this dyno is better then that dyno, etc.
The net/net is that if you use the same dyno before and after mods, just look at the delta.
Don't know if this helps, as it is late and I am tired, but I hope so.
thanks
brad
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Joined: Sep 2006
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e55
Dyno Dynamics > Mustang > Dynojet.
if you want the worlds most accurate real world dyno you have to go dyno dynamics. If you are just trying to compare your numbers with other peoples for the sake of competition and you just want high unrealistic numbers. Dynojet can't be beat.
if you want the worlds most accurate real world dyno you have to go dyno dynamics. If you are just trying to compare your numbers with other peoples for the sake of competition and you just want high unrealistic numbers. Dynojet can't be beat.
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Actually...The Mustang Dyno's work slightly different than the Dyno-Jet Dyno's..
Mustang Dyno's apply a load, via eletro-mechanical resistance, then rwhp is calculated based on how your "acceleration/unit of time" of this load occurs..
DynoJet Dyno's simply use a large drum, of know mass, as its rotating resistance...Then rwhp is calculated based on how your "acceleration/unit of time" of the drum occurs...
It really doesn't matter what Dyno you use...Just as long as you keep using the same dyno to check your mods...This will keep variances down to a minimum and tell you truely if any mod is helping or not.
Mustang Dyno's apply a load, via eletro-mechanical resistance, then rwhp is calculated based on how your "acceleration/unit of time" of this load occurs..
DynoJet Dyno's simply use a large drum, of know mass, as its rotating resistance...Then rwhp is calculated based on how your "acceleration/unit of time" of the drum occurs...
It really doesn't matter what Dyno you use...Just as long as you keep using the same dyno to check your mods...This will keep variances down to a minimum and tell you truely if any mod is helping or not.
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Joined: Nov 2001
Posts: 2,599
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From: Scottsdale (aka The Surface of the Sun)
Actually...The Mustang Dyno's work slightly different than the Dyno-Jet Dyno's..
Mustang Dyno's apply a load, via eletro-mechanical resistance, then rwhp is calculated based on how your "acceleration/unit of time" of this load occurs..
DynoJet Dyno's simply use a large drum, of know mass, as its rotating resistance...Then rwhp is calculated based on how your "acceleration/unit of time" of the drum occurs...
It really doesn't matter what Dyno you use...Just as long as you keep using the same dyno to check your mods...This will keep variances down to a minimum and tell you truely if any mod is helping or not.
Mustang Dyno's apply a load, via eletro-mechanical resistance, then rwhp is calculated based on how your "acceleration/unit of time" of this load occurs..
DynoJet Dyno's simply use a large drum, of know mass, as its rotating resistance...Then rwhp is calculated based on how your "acceleration/unit of time" of the drum occurs...
It really doesn't matter what Dyno you use...Just as long as you keep using the same dyno to check your mods...This will keep variances down to a minimum and tell you truely if any mod is helping or not.
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From: Corona, CA
03 g35 coupe...........02 c32 Sold
i would just go with who ever is the better tuner. Long as you have your baseline and final numbers on the same dyno, the gains should be the same. The final number will just read 13% higher or lower.
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From: MARYLAND
14-F Sport, 07-CLS63 2003-HUMMER 2004-Suburban 2008-MAX 2005-YZF R1
This little performance shop opened up across the street from my work and they have some Mustang dyno. I've mostly read about Dynojet on here (I think that's what Evosport uses) so I asked them what the difference was. They said the Mustang puts load on the car to simulate actual driving, but the Dynojet gives hypothetical numbers. The owner was out so they couldn't give me a quote, so I left and said I would come back later. When I was leaving, I noticed some other performance shop popped up across the street and they have a Dynojet. So both are available to me. Which should I run my car on and why?
Is this in the Baltimore area or Orlando??
