DynoJet Fudging Tutorial 101

It’s honestly pretty funny how far internet trolls and wannabes that want to take a bite out of you will go. News flash — I’ve been doing this for years and seen all the lies and dyno fudging one ever needs to see that will last a lifetime. Yet these “people” still seem to think tuning is all about power and racing their dyno sheets (fake at that) online.

But sure, I’ll show you how to make 20hp+ on a DynoJet without ever changing a thing and getting the ability to claim “there was so much wrong”. This is really juvenile internet troll behavior — but hey it’s the weekend, let’s spend a little time burning them down.

Start With a Potato Graph Baseline

baseMake it as hard to read any information as possible. For the sake of this blog post though — I want it legible so I won’t go that far. Not a single thing was tuned in the tune for these pulls. Not one. The tune is exactly the same.

Next add in the retune “baseline” graph –more– noting an amazing 18 increase, wow!

But hey we put in some more work, and more_conditions_screwednow the car is making 278hp, an amazing 26hp gain!!!!! WOW!!!

How is this even possible??

Fudging The DynoJet Broken Down

Let me be clear — anyone can fake any dyno to push whatever agenda they want. They’ve been doing it for years, this isn’t anything new.

So how did I get the numbers to go up without changing the tune (I can certainly claim I did and that in the base “everything was wrong”)?

Note how the curves are very similar — it really is the same tune. Very rarely will the overall curve of a “retuned” vehicle follow the same path if it’s a different tune. So the first thing you should note — the graphs are all individual, they are not overlayed. There is no correction factor listed anywhere on those graphs. So let’s shed some light.

base_conditionsHere is the base dyno making “252 whp”, but now with correction factor and smoothing used. We had an overall correction factor of 0.99 which made the numbers lower.

more_conditionsWhat do we have now? This is the “270whp” graph. We’ve switched to the STD correction factor, which is now an overall 1.01 correction — making the numbers read higher.

But that’s not all that’s changed — we also went from gearchangeusing 3rd gear to 4th gear, which “added” 10hp on it’s own, as seen here on the right. Note the “gear ratio” information — higher number is an earlier gear (3rd in this case vs 4th gear). This is not an unusual phenomena — dynos can and will read a bit different based on the gear you use.

But hey, for internet “facts” sharing — we just gained 18hp by fixing a tune that was “so wrong” — LOL?

It gets better. What if we mess with the dyno more_conditions_screwedweather station? Wow, we have an amazing 278whp now! I can leave the correction factor, gear ratio and all other analytical data off, just share these numbers and now I’m the best “tuner” in the world — I just made 26whp over someone else’s tune, without changing anything (but I can certainly claim I did — who’s going to know, right?)!

more_conditions_screwed_conditionsBut if we actually pull up the run conditions, note correction factor now — 1.04. With a very weird humidity… yup, the graph had someone screwing with the weather station. Here’s a news flash as well — it is relative child’s play to screw a DynoJet run, even AFTER it’s been saved. I can do this (or anyone else scam_examplewith basic computer skills) with any DynoJet run file someone sends me — make their graphs read “higher”.

Finally a 1:1 overlay to show you can even fudge a direct comparison if you want to.

And hey, as far as the Internet is concerned — if I post these graphs and just claim the base tune was wrong, who’s going to know, right?

Well I Know. M’Kay?

In conclusion? If you want to make your tooner friend look good, there’s legitimate ways, and then there’s BS ways. Spreading lies and false hope never helped anyone — you just lose any credibility you could of had as you and whatever friend/tooner/shop you are trying to “back up” is clearly a liar with no integrity. But hey, that’s just the game, right? Sure, but I’m not playing.