Ford Says It Makes 500 hp, Four Different Dynos Give Four Different Results

[Junkyard Dog]

All on 91 octane. Hopefully this is not a repost.

https://www.carscoops.com/2026/04/mustang-dark-horse-dyno-test/#Echobox=1785737149

Sponsored

 

[robvas]

same 91-octane fuel

It was never going to make 500hp

 

[ZXMustang]

Dynos should never be used for anything but to measure gains. Total output is too variable.

 

[AZ_Ryan]

https://www.mustang7g.com/forums/threads/steeda-claims-it-is-it-real-world.178220/

 

[LouG]

Dyno numbers, often right up there with "I'm from the Government, I'm here to help", "You may feel a little discomfort", and " I promise I won't............... mouth.

 

[D/\rK•650]

The motor I'd bet makes 500hp. It has to be in Fords performance engine cradle. Then absolutely it is 500hp motor. . All motors can vary alot based on lots of variables. Right?

 

[Neggytive]

Dyno's measure torque, the HP number is extrapolated, and different machines have different smoothing corrections added on.

They are a great tool to do timing as in add timing until the torque gains stop then back it off a degree or two, or looking at A/F ratios which is why it is said time for torque, jet for HP.

But for comparing different engines against each other it is a crap shoot

There have been guys on TV ( Engine Power, Engine Masters) who have built identical engines and run them as close to same conditions as possible ( oil temp, water temp, density altitude, etc etc etc) and never gotten the 2 engines to give the same data

If you get the same data,for one engine within the range of variance / tolerance of the machine you are doing good. When you can replicate the data it is considered valid

Getting 2 or more engines to come out the same on any given dyno is unlikely IMHO

Sponsored