vaioT17

Hi, anyone here can to share which dyno machine is value for money and reliable for all vehicle. Please give some comment on these 2 dyno in term of $$, accuracy, maintenance, durability and etc. Your comment/advice is much appreciated. Thanks

jmelocik

iTrader: (153)

I would contact some of the larger tuning shops and find out why they bought the ones they did. Seems to me that the Mustang Dyno's are sorta becoming the standard.

Josh

ScorpionT

iTrader: (1)

Mustangs and Dynamics are much more accurate than Dynojoet, provided the person running knows how.

EvoJoeIX

iTrader: (16)

dyno jets read higher and have less load on the car. whcich isnt good for tuning. you want to tune the car under the same load the car sees on the road.

mustangs are probably the best to get tuned on, just dont expect high numbers

Kracka

iTrader: (49)

Dyno Dynamics reads the lowest, but is generally the best for tuning.

jmelocik

iTrader: (153)

anyone here own one? I don't but would like to hear the opinion of a few owners.

S2kracka doesn't your buddy run a shop with a dyno? what kind? maybe he could chime in?

Josh

vaioT17

yeah i would like to hear more opinion too. My fren workshop is installing one soon. I just want to help him to find out more.. thanks

hytek369

iTrader: (81)

so low, they are known as "heartbreakers"

DJ_Keith

I think you might have that backwards - I don't think any dyno company out there would argue that their units are more repeatable and consistent, from run to run or dyno to dyno, than a Dynojet. Check out page 2 of the PDF I attached for a more indepth explanation.


Hey Joe, the current model Dynojet 224xLC (2WD) /424xLC (AWD) dynos use a combination of inertia and eddy current load to be able to do whatever the operator chooses. You can do:

• inertia only runs (load of the weight of the drum(s) only),
• steady state loaded testing (apply load with the eddy current absorbers to hold the vehicle at a given spot - either RPM or speed closed loop),
• step loaded test (set to hold the vehicle at each of multiple RPM or speed steps for a certain amount of time) or
• sweep loaded test (add a % of load over the entire run).

Here's a good read if you have a few minutes, regarding dynos and testing in general.

alex4nder

iTrader: (2)

I actually thought it was a poorly written paper, with a bunch of attempts to induce fear thrown in.

For me a dyno needs to provide two things: a means to get the engine in every load/RPM cell, and a means to measure torque or power precisely so I can determine if changes I'm making are having an improvement to the calibration of the ECU.

I haven't used a DynoJet with load control, but the inertia-only models suck at getting the engine where it needs to be to properly tune. I don't really care if the numbers out of them are consistent from dyno to dyno, when I can't properly tune an engine with one. Invariably when using a DynoJet, you'll get the WoT parts of the tune mapped, and then spend forever street tuning the rest of it. Even the die hard domestic guys are starting to get this.

If all you need is to give your customers high HP numbers, than the DynoJet units are a great, cheap way of doing that. If you actually need to tune the cars, then there are much better (and unfortunately more expensive) options out there (e.g. Mustang, Dyno Dynamics, Mainline, DynaPack).

kimletrim

iTrader: (18)

^^Well put.

EvoJoeIX

iTrader: (16)

okay maybe im not 100% about the dyno jet thing. maybe im thinking of a different model of something

that pdf attached is written from dynojet. like i said i dont know everything about dyno's but to me seems like it could be a little biased....

Turbojunkie

iTrader: (21)

lol! great another dyno comparo to spark up a debate that 99% of the peole who comment, have no idea of what they are talking about. i would say do some research and buy the one that fits YOUR needs. simple.

PeteyTurbo

iTrader: (9)

I prefer mustang or dyno dynamics..The dynojet 4wd dows not have a mechanical link between the front and rear rollers and it's eddy current system has not been known to work nearly as well as mustang or DD for a constant load and is not nearly as proven. The dynojet is the cheaper of the three so that may be a plus certainly. The number that the dyno spits out is up to the calibration unless you fiddle with corrections ect to work for or against you..I live the software for dyno dynamics and display the best though but I mainly use mustang..

DJ_Keith

So basically, you haven't even seen or used an inertia + load Dynojet dyno? There are quite a few out there, both in the states and abroad. As I said above, you can closed loop load the car at any speed or RPM point.

Normally, we would set an RPM hold point at 3000rpm for instance, then change TP% to achieve the target cell, adjust, then move on. If you want to adjust timing, you can look at the instantenous torque reading and make changes to timing as well.

The arguments you are using are severly dated. They were true back in the late 90's and up until around 2002 - but load added Dynojet dynos have been available for the last 5+ years. Many shops have and use them. Shops like AMS Performance, SouthSide Performance, Underground Racing, etc, etc. You should go check them out. They are quite a bit less expensive, and give all the tuning capability most are seeking.