The Mustangs and the Dynodynamics (like at the shop) are loading dynos and tend to read lower than the Dynojets which spin a drum of a known weight.
As mentioned, it is best to keep going back to the same dyno with the same operator for the most consistent data.
Here is something that Ronnie taught me and I have found it to be true.....
Look at the Dyno as nothing more than a tool. Yes it is a tool that gives HP numbers but they are just that numbers...... Don't get hung up on HP hunting. It provides all the A/F misxture numbers and where and when the HP is being applied during the RPM cycle. Those numbers allow the tunner to make adjustment to get the most out of your engine.
The operator can change a few parameters on the initial setup and make the Dyno give almost any HP number he wants it to. That is why Ronnie said go to the same Dyno each time and use the same operator with the same setup on the Dyno. That way you can get honest feedback on the mod you just did and find out if it helped or hurt and by how much.
So find a Good Shop with an operator that knows what they are doing and stay with him.
Had to confirm if my new-to-me truck had actually been worked on other than the K+N intake, MOPAR headers, high-flow cat pipes and Magnaflow cat back.
463 HP at 5250 RPM
490 TQ at 4250 RPM
I'm most impressed that it made >470 TQ from 3000 RPM to 5250.
Guess I'll post the sheet after a couple...
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