As some of you may know, I will be going into AMS to have my car tuned by them and EPL. My car put down 535awhp on Tony's dyno (mustang) does anyone know what that will translate to approximatly on AMS's dyno (dynojet)?

I am so looking forward to seeing 1.4 bar again and will be hitting the track right after the tuning session. I hope to trap in the low 130s.

 

I think a mustang is generally more conservative than a dynojet. So I would speculate you would make 560-580 on a dynojet.

 

DynoJet is a non load bearing dyno and the Mustang Dyno is load bearing. You really cannot compare the two to see a power gain.

 

So there is no way for me to determine if the retune actually yielded some gains?

 

I thought you were going to dyno first without changing anything.

 

Yes, you dyno before and after on the SAME dyno. And keep the conditions as similar as possible.

 

Picture this for comparison with the dynos stated above. Analogy isn't so much exact but you get the idea of comparison of each.

DynoJet - Pick the car up and spin the wheels
Mustang Dyno - Place the car on the dyno (similar to how it would be sitting on the street) and spin the wheels.

Not for sure about AWD drivetrain loss in a Porsche but RW (I.E. for Vettes and Mustangs ) and one is looking at 5
% to 7% difference lower from Mustang Dyno numbers vs. DynoJet Dyno numbers

This calculated on same DA, temps, etc.etc. as well.

 

I always heard it the other way around that Mustangs read lower then Dynojet.

 

I think he mixed it up. The DynoJet will ALWAYS read higher than a Mustang dyno.

 

Mustang reads at least 7% lower than Dynojet. Dyno dynamics reads at least 10% lower than Dynojet.

 

Go out and run a 60-130 BEFORE you dyno. Go out and run a 60-130 AFTER the dyno. The dyno numbers are for the guys using the dyno.

 

What changes have you made?

what turbos are you running?

What octane?

 

Had typed what I did in an incorrect order. Edited and fixed now.

 

Hi guys,

Just wanted to interject very quickly about dynos. It is very hard to generalize the results that come out of one dyno to the numbers of another. Just because you have 'A' dyno and you want to compare it to 'B' dyno you can't just throw blind correction factors at it. Due to the number of user adjustable features on most dynos you can have a specific brand of dyno that will read 10% less than that same exact dyno in another shop.

Dyno's which are load based require a 'calibration' which can be the source of much 'interpretation' and also makes a comparison between them pretty much impossible.

Two good point which have been mentioned in the this thread already are:

60-130 tests
Using the same dyno in the same shop to extrapolate results.

A dynamometer is only a tuning tool, and not much more. I know what the numbers on my dyno mean when it says 500hp because I have personally made the last 19,000 dyno pulls on it, but I don't routinely use anyone else's dyno that much

-Chris

 

19,000? That's all?