Competition Mustang Dyno Q&A

[CRoth - BD-Power]

Has anyone run their truck on a Mustang 1750? What was the HP reading? Was tire slippage a problem?



If you are not familiar with the dyno it is Mustang's top HP dyno with the 50" roller.



I'm just trying to get an idea if the 1750 will provide better traction and repeatability on high (>500HP) HP trucks than the 250 and the 750.

 

[dramer]

MD 1750

We have been using the MD 1750 and like it. The numbers that we have been getting have been very repeatable. Traction seems to be great; we have been running high HP gas & diesels on it. The only thing we had to do was cut the roller plates off for the duel tires. It works well other than that.



Don Ramer ATS Diesel Performance.

 

[DEZLPWR]

Not to sound like a smarta$$, but if you are really worried about traction, why even mess with the Mustangs? Why not go with a Dnyojet?Oo. Oo.

 

[Roger rodbolt]

Originally posted by DEZLPWR

Not to sound like a smarta$$, but if you are really worried about traction, why even mess with the Mustangs? Why not go with a Dnyojet?Oo. Oo.

I don't have very much dyno experience but my guess would be that a Mustang will fully load a diesel so you can get a max boost/power reading while a dynojet will only measure acceleration and many times will not impose enough load to fully spool a large turbo. ??? Larry

 

[Amianthus]

Roger (Larry) is right on. The mustang dyno has the ability to fully load a turbocharged engine moreso than a dynojet. But a dynojet can reproduce results, time after time after time and have little to no variance in results. The dynojet is great if you want to see if your mods are doing anything (and how much they are doing). But if you want to measure power there is only one way to accurately do that. That is to fully load the engine.



The way to measure HP would be to run the engine up to its governor and load it until it is down to ~idle and then slowly release the load, taking measurements, until you are back on the governor. The problem with that is our trucks very rarely can stick to the rollers with the kind of torque we put out. If you slip on the rollers, the run is ruined and you need to do it again. That's where the dynojet really shines. Slippage on that dyno is minimized by design.



Each dyno has it's good and bad points.



(Sorry HVAC about misexplaining myself in Muncie. I knew what I was trying to say about dynos, but I was suffering from stimulation overload, read brain fry, and couldn't get the words out right. )

 

[CUMINNTSTRKN]

the 1750 is supposed to be the best of both worlds. it has 50" rollers, and it can also load. it sounds good in theory but don seems like the only one who as used one, and there #'s were pretty optimistic if i remember correctly. but if you took the correction factor out it would most likely be ok.



jim

 

[dramer]

New Dyno & ways to learn

Our comments were on the MD1750 and how our experiences have been. We go by our 1/4 mile times also to compare with. We have been working more with some new dyno's also. Lets get your expert opinions on this one jim.



http://www.melfab.com.au/dynopack/

 

[Roger rodbolt]

Dynopack looks great!

Don,

I can't offer an expert opinion but would think the Dynopack should be capable of serious R & D work. Hydraulic loading should be smooth and repeatable.



I had to chuckle when I read the part about being sensitive enough to measure the headlights being turned on :-laf :-laf. My frist political campaign was low budget and I drove a Chevy Sprint (3 cylinder Suzuki) that would daily get 50mpg. My "seat-o-pants" dynometer will hardly detect a 100hp in our Rams but even I could detect the headlight load on the Sprint. . Larry

 

[dramer]

Were always looking for new technology

That’s one of the things I like about the diesels, it will not cut the vehicle speed 10mph or more when you turn something on like alternator or a/c.

We have been looking for new ways to improve dyno testing for diesels. All of the dyno's can work very well as a tool to use to look for gains or losses. When looking at The MD1750 we starting to see the software had some problems with the rate of torque rise with low rpm's. The diesels can be hard to measure at certain loads and rpms.

When we started looking at removing the tires & Wheels out of the loop things get way more reliable. We made some plates to bolt the axle hubs up to the 3/4 1-ton trucks. This dyno can really load things down very quick. Still learning all the time. Not sure yet but still working on it. The other nice thing with this dyno is its portable.



Don ATS Diesel

 

[KatDiesel]

Originally posted by DEZLPWR

Not to sound like a smarta$$, but if you are really worried about traction, why even mess with the Mustangs? Why not go with a Dnyojet?Oo. Oo.

The baby rollers of the Dynojets doesn't always provide enough load. Last two Dynojets I have been on stated I had 446 and 447hp... ... ... ... if you do the math on the 1/4 mile times it comes out completely different. I'm trying to get on a local mustang dyno and see what happens. The last dynojet run my truck made more smoke then I have ever seen!

 

[CUMINNTSTRKN]

don



does someone have one of those in the denver area? if not is there one in the western us? i would like to see one of those things in action. the only draw back i see is the time it would take to hook it up.



jim

 

[Piers]

I was just checking out that dyno, while at SEMA. Like Jim said, other than the time to hook it up, it looks very good... ... but then good things are worth waiting for



Piers

 

[CRoth - BD-Power]

Jim , Bullydog just got a MD1750, a couple hundred miles isn't far.



I know Mustang and BD would offer some type of compensation for anyone over 700HP to vist the Mustang plant in Ohio, to go test one of these things out.

 

[StakeMan]

There was a differnce of 2 hp between my run on the MD1750 and my 1/4 mile calculations based on ET. Both were here in Denver.

 

[Sled Puller]

Originally posted by CRoth - BD-Power

Jim , Bullydog just got one, a couple hundred miles isn't far.



I know Mustang and BD would offer some type of compensation for anyone over 700HP to vist the Mustang plant in Ohio, to go test one of these things out.

I'm on my way, only 90 minutes!



I will take Piers stoopid pump for my compensation.



I'm serious.

 

[Jetpilot]

Christian,



If you are really serious about compensating someone going out to Ohio to test this dyno get in touch with me.



Jetpilot



Doug

 

[ob1kobi]

I may be interested in helping out with some of that testing also.



Ted

 

[CUMINNTSTRKN]

Originally posted by CRoth - BD-Power

Jim , Bullydog just got a MD1750, a couple hundred miles isn't far.

yeh i'm sure they would let me come down and play on there dyno.



jim

 

[J.R. Adkins]

Hey Christian,



Let me smoke the rollers!!!







J. R.

 

[J.R. Adkins]

Fellas, I was just wondering how many of us are @ or above 700 RWHP DRUG FREE?!!



J. R.