First 2024 Mustang GT Dyno Results

[rebelyell22]

My Gen 3 10r80 with a 93 dyno tune for comparison

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[Q6543]

Where you read SAE 1.02 … that’s adding power to your numbers.
You would’ve dynoed 396 that day.

a stock gen 4 in 7th would be closer to 430 stock.
@rebelyell22

 

[rebelyell22]

Where you read SAE 1.02 … that’s adding power to your numbers.
You would’ve dynoed 396 that day.

a stock gen 4 in 7th would be closer to 430 stock.
@rebelyell22

Yes, 1.02 is the correction factor, which changes based on environmental factors. I'm in North Mississippi where we have very high temps and humidity.

 

[Dub347sbf]

It will be nice when we see some gen 3 vs gen 4 dynos back to back on the same day. I believe it will confirm some power gains. Comparing years old numbers on different dynos is pretty silly.

Id love to see a 23 mach1 vs a 24 Dark Horse same day and dyno. Or a 23 GT vs 24 GT. Or even 24 GT vs 24 DH. Thats the only way we will get accurate comparisons.

 

[Zig]

Comparing years old numbers on different dynos is pretty silly.

…same day and dyno.

I kinda think of dynos as one’s own personal drag strip. As long as same strip same conditions I’m able to tell if the mod improves or reduces performance. Different dyno different parameters = different track.

 

[Stanzi]

Assuming a 15% DT loss, that is spot on with rated non active exhaust numbers of 480hp.

I'd say the car is very green and will pick up once it's gotten some real miles on it too.

I think the cars are over rated from the factory. I can’t believe a car in 2025 still is experiencing a 15% drivetrain loss.

I’m coming from an AWD ‘24 WRX that had a 6% drivetrain loss from the factory through AWD and multiple drive shafts.

so either my WRX had 300HP from the factory or the Mustang isn’t really 486.

 

[robvas]

I think the cars are over rated from the factory. I can’t believe a car in 2025 still is experiencing a 15% drivetrain loss.

I’m coming from an AWD ‘24 WRX that had a 6% drivetrain loss from the factory through AWD and multiple drive shafts.

so either my WRX had 300HP from the factory or the Mustang isn’t really 486.

WRX doesn't have 6% drivetrain loss. It's way higher.

 

[Stanzi]

WRX doesn't have 6% drivetrain loss. It's way higher.

I would say the dyno says otherwise. The 2024 WRX is rated at 271 HP.

It put down 255 at the wheels when it still had temp tags on it.

That’s a 6% drivetrain loss based on what the manufacturer rates it at.

I’m not claiming that it is an actual 6% loss… I’m not sure how we would know.

My point is that I believe Ford inflates their HP numbers based on rated HP vs what the cars put down on the dyno.

See attached. This was my personal car on a Mustang dyno no less.

 

[robvas]

I would say the dyno says otherwise. The 2024 WRX is rated at 271 HP.

It put down 255 at the wheels when it still had temp tags on it.

That’s a 6% drivetrain loss based on what the manufacturer rates it at.

I’m not claiming that it is an actual 6% loss… I’m not sure how we would know.

My point is that I believe Ford inflates their HP numbers based on rated HP vs what the cars put down on the dyno.

Subaru underrated the power a little bit. It's a well known fact in the WRX community. No big deal. BMW often does that with their performance cars as well. There's no way to get 5% drivetrain loss especially on an AWD vehicle.

I wouldn't say ford inflates the HP. Factory rated at 480hp, say you get one that makes 420hp on the dyno, you end up with 13.5% drivetrain loss.

 

[robvas]

While we're at it let's go back in time to 2002, when the WRX was first released in the USA with 227hp. Those things only dynoed 175hp!

Works out to 23% drivetrain loss

 

[Stanzi]

I just see a lot in the low low 400’s, some even I saw were high 300’s - but that might be tuners doing funny things to show higher gains on their tunes.

as soon as I can take delivery of mine, it will be one of the first things I do - dyno a baseline.

 

[Stanzi]

While we're at it let's go back in time to 2002, when the WRX was first released in the USA with 227hp. Those things only dynoed 175hp!

Works out to 23% drivetrain loss

That’s the game that manufacturers play.

Back in 2002 I had a “310 hp” Z-28 that everyone knew had the same damn engine as the Corvette rated at 350HP.

They were putting down about 310 to the wheels, just like the vettes . So my car must have had a 0% drivetrain loss.

 

[robvas]

I just see a lot in the low low 400’s, some even I saw were high 300’s - but that might be tuners doing funny things to show higher gains on their tunes.

different dynos, different cars, different days.... and of course picking and choosing runs

 

[Stanzi]

That’s the cardinal rule of dynos.

gotta stay with the same dyno for all subsequent runs.

 

[Q6543]

Mustang dynos read notoriously low fwiw

the drums are loaded so it’s better for actual tuning, not posting big #’s

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