Does anyone have any experience with a Dyno Dynamics Dyno?

My questiosn is this: Does this Dyno adjust the settings for weather, humidit and heat/cold?

I dynoed my car on one a few months ago here in Az when it was about 80 degrees and right now were are reaching Summer temps of 110+. I wanted to know if the dyno will adjust its settinsg to take this into affect and give me accurate dyno results a if I am dyoning my cr again in 80 degree temps. I dod some mods and I want to know how much HP I got from them and I dont want a higher or most likley lower power reading due to hotter tempatures now.

 

u need too use a SAE correction factor tahst takes into consideration all the stuff.
some like to cheap and the use uncorrected duno #s.

 

Yes, it is a very good dyno. This was the second choice I had when I bought the Mustang. It will correct and also show crank roll back HP. Much like the Maha does.

 

Ok great, thanks for the word.


What does crank hp roll back mean?

 

Just to somewhat correct the previous post....The Dyno Dynamics is not quite similar to a MAHA. I apologize Doc, I am just trying to give more details.

The DD does not calculate loss on deceleration and convert to flywheel HP (crank HP roll back), it has some preset values from the factory for different cars and it works based on those. Therefore it is (very) prone to errors, especially in anything that is not stock drivetrain loss, and depending on the mileage, condition etc.. of the drivetrain.

This is quite different from how the MAHA operates, which calculates losses while under deceleration and converts to FWHP..This is much more accurate as it is car specific.

What makes the DD (somewhat) better than other rolling road dynos is that it is not inertia based, therefore less prone to errors driven by other "non stock" engine components. However when used to convert rear wheel to flywheel numbers, those non stock engine components (like a LWF for instance) will fool the numbers, since the DD uses preset conversion tables by manufacturer.

I have seen huge errors on Dyno Dynamics and it was recently posted on another Porsche forum. Unintentionally maybe, but it shows how dependent on the dyno operator all of these rolling dynos are.


To go back on topic
To have comparable measures under different temperatures, the dyno MUST have a weather station, otherwise your readings can and will vary greatly. In this crazy world where (we) people are focusing so much on dyno readings to determine real HP instead of pure acceleration performance, a 10% margin of error is a lot, while being at the same time a very easy variance on a rolling dyno..

 

No worries Jean. I appreciate the correction.

When I looked at buying one it was represented to me that there was a roll back calculation procedure much like we can do with the Mustang less the headache of actually picking the car off the wheels at 150MPH. They explained that it could be either way. You could choose to use the standard in the system or do it yourself mechanically. They also said a lot of other things and when it came time to buy didn't pan out. So obviously I was misinformed.

The DD is good for steady state tuning based on the ease and smoothness of RPM change. Even my dyno is a little choppy at times. There are lot of differences.

Never choose a dyno for number comparison. Use them as a base and delta when completing modifications. Any dyno should be viewed this way. I look at ours as more of a tuning tool then a show and tell.

 

I am sure the DD is a great dyno, was just trying to clarify about the correction preset tables since it can be mistaken with deceleration based correction like with the MAHA.

Fully agree with you Stephen.

I hope this answered Exotic Lover's question?