Inertia dynos can measure WOT conditions but anything partial throttle or steady state is not easily done.

High hp cars are usually drag cars which run only @ idle and WOT. Hence their preference for just inertia dynos. They are cheap, easy to use and plentiful.
However inertia dynos do have traction problems @ higher hp levels as well.

 

I'm sure a good salesmen could make a good pitch for using four treadmills as dynos if he was good enough.

The fact is that Dynojet cannot simulate real world conditions.

Certainly, many tuners still use Dynojet and come out with REALLY HIGH HP cars on a daily basis. But how drivable are they?

Please keep in mind, the argument at hand here is not whether or not Dynojet can tune High Power Autos but how good these dynos are at actually tuning a car for what it's used for i.e. daily driving, street, drag, etc...

As far as citing Germanmotorcars as my source of argument, you can find the same argument made by many others.

Thanks for the comments--NLM

 

Ok, is this the same for Mustang dyno= Innacuracy??????

 

You've asked the same question like 5 times in various ways.

Intertia Dynos = WOT (Wide Open Throttle) Tuning. Cannot tune partial throttle
Load Based Dynos = Can Tune Acrss the spectrum for its purpose (street, drag etc)

Intertia Dynos: Mustang, DynoJet
Load Based: Dynapak, Dyno Dynamics

 

Mustang is a bit different. Despite the fact it doesn't operate on one mass of a roller it does force both wheels (RWD) to move together (chained as one); rather than independly as with Dyno Dynamics. This doesn't raise the question of the accuracy of the dynos ability to measure HP but it's actually ability to replicate real world conditions.

So yes, if your question is does Mustang Dyno accurate measure and tune for Real World Conditions as well or as compared to Dyno Dynamics then the answer is NO.

 

Well, even DJ recognizes the benefits of loading based setup, and recently launched their own lineup.

It's easy to step on people's toes, in regards to dynos, so I am intentionally going to tread lightly. Shops invest tens of thousands of dollars on their dynos, so our positions are going to be biased, and most shop owners will defend their decisions to the bitter end. Even a new stripped down DJ is going to run about $35-$40k, and the DD AWD comes in at $110K!! These things are not cheap, so don't expect a friendly debate about dyno brands.

If you goto EFI101.com and talk in the true tuning circles, you will get an understanding of what most tuners prefer, and the reasons why.

 

I ask because others try to tell me get a mustang dyno, not dyno jet.. because mustang dyno is more accurate... Bla, bla, bla........ You couldnt possibly know the confusion with all these damn dynos.. Im like wtf.. dyno headache... I just want a true number..

I know the dyno cost is from 40k to 150k.. Im not downing any dyno just want to know what is going to give me true whp.. As far as tuning goes.. Yes, I can understand the dyno dynamics and dynapak tune the best.. I have taken my car to every dyno BTW.. Im serious..

 

AGAIN..you are refering to a Mustang dyno as a inertia dyno.....IT ISNT ! . It is a load base dyno

 

Great point Sharif! Thanks!

 

That's what I thought as well...

 

You're right. Good catch.

Thx--NLM

 

Wow, very interesting artilce. I never really understood dynos and how they worked let alone the array of choices and types. Thanks for that info.

 

Are you interested in purchasing a dyno or are you just curious about the differences for your personal vehicle?
If you're in the market, PM me and I'll fill you in on the details between the systems available on the market.

 

dynojet have been industry standard for reporting power anyways... but bottom line... its up to the tuner how well your tune will be... even if the tool in use helps out a bit more or not...its all made u by the skills/experience of the tuner

 

my bad.. I was just quoting OP.. Honestly i know jack about dyno's or tuning..

Im leaving that upto the boys at Forged when it comes time

 

As put some nicely by Sharif "Well, even DJ recognizes the benefits of loading based setup, and recently launched their own lineup.

It's easy to step on people's toes, in regards to dynos, so I am intentionally going to tread lightly. Shops invest tens of thousands of dollars on their dynos, so our positions are going to be biased, and most shop owners will defend their decisions to the bitter end."

I'm guessing you were tuned on Dynojet?

 

both actually

ninja edit... n/a tuned also on dynapack


i don't need to parade what you have in your Zig. I do make the point that industry standard is dynojet for power... but as far as Tunning its really all up to the tuner. Not what dyno it uses at all (as long as its nota butt dyno )

 

Good post and it also shows how a dj inlates numbers as well as a dd shows real rwhp.When i went to functiontuned with there heartbreaker dyno dynamics dyno.....i was warned that i might not like the numbers as compared to a dj.I could actually care less what the numbers say cause i can feel it in the seat of the pants.I was told that on a dj i would probably be about 30-50 rwhp higher.
Ill take a dd anyday over a dj reading.

 

a post typical of someone who got tuned on only DD and feel because of that its better. That vendor did also start a thread sorta similar to this but implying that because its DD the tune is better and otherwise you woudl be unsafe

 

What I like is when people dyno on a Dyno Dynamics, Mustang, etc, and publicize numbers that are xx% lower without knowing some sort of "Dynojet" correction was applied.

We all know that Dyno Dynamics numbers are lower, but only if uncorrected. In the original post it speaks of misleading Dynojet numbers... What it doesn't mention is how many of the shops that run these dynos doctor and alter the output themselves (many times without the customer's knowledge).