I have never used a dynapac but have been told it is tricky with an automatic transmission. Also what type of load method does the Dynodynamics use that is so different than Superflow, Mustang eddycurrant etc. ?

 

what about a superflow dyno???

http://www.superflow.com/autodyn/index.htm

 

I am waiting on a current quote, but last time it was about 60K. Well worth it in my opinion for what I can do with it. Especially on the certain Turbo trucks and cars floating around my shop.

 

I am not to sure on the setup of the dyno dynamics. I think it had to do with twin rollers and the tires somewhat touches or rubs the center in between? I could be way off. Just what I heard. Dont quote me on it.

Rick

 

you can load a dynojet too

 

I have both a Mustang MD-1000 and a Dyno-jet 248C. I get very consistant results from BOTH dynos ... its a matter of test engineer or dyno operator and the test conditions. We use a ScanmasterII and Auto-Tap for OBDII or a six channel data logger for earlier cars. We have a thermostatically controlled dyno cell and appropriate evacuation system. All our machines are routinely calibrated and maintained.

In particular, the Mustang dyno is a good tool however it does require more set-up to use properly. Most people use the parasitcs calibration loaded or created for the set-up and dont bother to make their own. Do be accurate you can actually do coast down losses for every car and get more eccurate numbers ... but this means an additional hour or so of set-up and use before you even get started. Most dont bother.

I have actually found that our numbers (when we maintain side-by-side testing) are within 2-3% and only about 5-6% when the parasitics files are not updated by vehicle. These devises are just tools ... I can use them to make any number i want shoudl i so desire ... fortunatley, ours are used for development and not for pumping out king of the dyno numbers.

 

That's exactly what I'm getting at. There are so many ways to fudge a dyno number that I hold no faith in them at all. I try to find a shop that I know has integrity and stick with em even if my numbers are not the best looking. Hell I'd almost rather pump out low numbers as long as they are consistant then go to the track and blow away all the dyno queens.

 

Yes sir on that one.

 

i seen an A4 dyno awd on a dynapack definitly made me nervous watching it just suspended from all 4 ends and no wheels on it.....

 

Thats the thing though. It may seem scary, but whats worse, loosing a car on the dynapack or loosing a car on a roller dyno? I would gladdly take the dynapack over that because I can replace a couple of brake rotors and be on my way.

Rick