A new type of Dyno???

[BillyGman]

Has anyone here seen or heard of the type of Dyno that this place is talking about. It says that it doesn't use a roller that the car tires ride on. Instead, the rear wheels (if it's RWD) are removed for the Dyno test. Click on the link and check it out. I just wish that they supplied a pic of this thing.

www.dynotime.net/

[martyo]

Billy: Haven't seen this one before. Let us know waht you learn.

Where is Prospect, CT? Never heard of it.

[03SILVERSTREAK]

Has anyone here seen or heard of the type of Dyno that this place is talking about. It says that it doesn't use a roller that the car tires ride on. Instead, the rear wheels (if it's RWD) are removed for the Dyno test. Click on the link and check it out. I just wish that they supplied a pic of this thing.

www.dynotime.net/^^^What he said^^^

[Dan]

Prospect CT is a small town just east of Waterbury CT which is what we in CT call as city but is probably considered by most to ALSO be a small town. :)

That web page is interesting but someone needs to give the author a writing lesson. It is long on hyperbole and short on details.

BillyGMan, are you near enough to drop by his place and see if he will give you more info?

If not, I might be able to head down there from HHNB.

Best,

Dan

[halucin8]

The shop I got my Miata turbo kit from has one of these. It's one of only two in the country. Evidently it's much more accurate and portable. It's called a Rototest.

Here's a link to their site describing it:

http://www.flyinmiata.com/tech/rototest.asp

[martyo]

The shop I got my Miata turbo kit from has one of these. It's one of only two in the country. Evidently it's much more accurate and portable. It's called a Rototest.

That thing looks a lot like the still that Todd keeps out back behind his trailer. Is it really able to do what the inground dynos do? If so, why haven't we seen more of these around?

[TAF]

That thing looks a lot like the still that Todd keeps out back behind his trailer.
George Jones - White Lightnin'

Well a city slicker came and he said...

I'm tough I think I wanna taste that...

Powerfull stuff he took one swift slug...

And he drank it right down and I,

Heard him moaning as he hit the ground...

Mighty, mighty pleasin'your pappys corn squeazin'

ooooooo "WHITE LIGHTNING"
http://www.northgatenoise.com/music/12Ligtinin.mp3

[SergntMac]

http://www.dynapack.com/Productframe.htm

Y'all know the difference between flywheel HP and rear wheel HP, right? Well, that flywheel HP was obtained on an engine dyno, and the DynaPack 5000 is an engine dyno for the rear wheels.

It's not really "new," the DynaPack has been around for a while, and it's gaining popularity. I've been using a DynaPack 5000 for over 2 years now, and I find it exceptionally accurate over the godfather of test machines, the DynoJet. Unfortunatly, like all new technologies, it has a high road to climb in popularity against the DynoJet. Lacking professional endorsements from NASCAR and NHRA, doesn't help, but that's changing too. By the time we get to the IRP in July for our MV-II event, the IRP should have 3 of these DynaPack 5000 machines available. Here's a few benefits to using them.

1) portable, can be moved from site to site in a SUV. Of course, it's like moving refridgerators, but it portable. No pit to dig, no lifts to install.
2) uses the latest editions of WinPep dyno software, which give US the most features for testing. This is the same software DynoJet uses.
3) can test 4 WD and AWD drive vehicles.
4) no power loss from loose tie downs, or, poorly inflated tires. Did you know you can add 10 RWHP by overinflating your rear tire to 50 PSI? Yep, Zack and proved it one night at Mike's High Performance. It can be done, which also means that underinflated tires can result in low numbers.
5) power measurements are taken directly from the axels, and fed into resistance adjustable drums. The dyno operator feeds your vehicle weight and gearing into the software and the drums adjust resistance to the power accordingly. This is not much different that a eddy current machine, but it is more precise.
6) Investment in equipment is about the same as others, 30K and up, but the owner of a small shop doesn't give up floor space, it can be tucked away in a corner and rolled out anywhere it's needed.
7) setup time is quicker than the typical scenario, it's a matter of jacking the car and changing the rear tires out for the spindles, which saves about half an hour on each dyno test setup.

I've talked to dyno operators and engineers who use dynos, and they remain skeptical on this technology, but only because they haven't had much contact with it. If you page through the fine print and understand how this works, it is the better test tool. All it's really doing, is removing the areas where stretch and slip cause a loss of accuracy. In fact, the cheat factor is zeroed out as well. The only way to fudge the numbers, is to enter the wrong gearing or body weight, and both are printed on the dyno report, so, everyone will know if you fudged. Think engine dyno for the rear wheels, it's a great test tool.

[BillyGman]

Thanks for everyone's replies. The thing that I still don't get is the claim on that website that I've provided a link to, concerning their ability w/this type of Dyno to also measure flywheel HP directly while the engine is in the car if the customer so chooses. I dunno if that's just a false claim, a bunch of sales hype, or the real deal.

I live 20 minutes from prospect, so I can check it out, but if it's lie what those thumbnail pics show, I wouldn't be very impressed. The other question I'd have about something that looks like that is, what about cars that have a locked or "posi" rear end like our MM's do? Would they still only be placing the load on one axle at a time w/that thing like the pics show on that Miata? That wouldn't sound too healthy for the rear end differential to me.

[halucin8]

I would guess that an equal load is placed on both sides of the axle.

[BillyGman]

I would hope so, but if this dyno in question is the one showed in that pic that's being used on the Miata, then the place that's performing the Dyno pull would need two of those units do perform the test on a Marauder. Right?

[SergntMac]

I would hope so, but if this dyno in question is the one showed in that pic that's being used on the Miata, then the place that's performing the Dyno pull would need two of those units do perform the test on a Marauder. Right?
Those pics of the Miata were red X to me when I wrote my post. That's not a DynaPack, looks like a clone to their concept.

The DynaPack attaches to both rear axles, and all four axles for 4X4 and AWD. I've got a lot of dyno time on the DynaPack 5000, it is better than the DynoJet machine. Now that the NHRA is taking a test drive of it's own, we should hear a lot more about them soon.

Check 'em out Billy, let us know?

[BillyGman]

okay MAC, I'll do that. Thanks again......

[halucin8]

Yes, there are two spindles. One attaches to each side. In the pictures I posted, the unit for the other side was not mounted to the axle yet. Now, I understand what you were saying.

[01 Interceptor]

I watched an episode of Super2nerTV on Spike TV one weekend...they dynoed an Audi Wagon after doing some computer and turbo upgrades. They used a unit similar to this, but considering the Audi had Quattro...there was one on each corner. The car was resting on jackstands, and they had a very high velocity fan in front of the car. It was interesting to see to say the least.

[mensrea]

Everyone, go out and pick up this months edition of Hot Rod, they have a great write up of a comparison between all the major dynos out there, and they explain "myths" surrounding dynos, as well as facts... for instance "do taller gears affect RWHP numbers". BUY THE MAG

Here's a post I have on Corral.net in response to someone asking if the Mustang dyno read differently than a Dynojet.

Hot Rod Magazine has a great article this month on chassis dynos, I suggest you go buy it. Heres a quick break down of tests they performed using a brand-new GT mustang with manual tranny. They tested a Dynapack, which uses a hydraulic absorber, a Mustang eddy-current and Dynojet inertia rigs, and finally a SuperFlow eddy current dyno. They say that the Dynojet has become the standard, however it may not reflect the vehicles true output. The dynapack and mustang tested in their standard load-test configurations, and the Dynojet tested in its standard inertia-only mode…. (read the magazine for more detail)
Here are the results (I only posted the standard, not corrected numbers)
Type of dyno Peak Torque Peak Power
Ford FWHP 302 260
Dynapack 253.4 208.9
Dynojet 269.3 226.9
Mustang 239.3 219.1
Superflow 269.4 225

[thePunisher]

i know this is an old thread...but just for some info i worked at dyno time for awhile...that dyno is legit...and dead accurate...moreso than the roller style. you can fully load the engine which will give you more accurate #s than the roller style which useds a generic weight brake. this is also great for supercharged cars cause full load means full boost. i could never get full boost out of my lightning on the roller dynos. and there is no chance of tire spin. the owners name is greg ploski and hes great to work with. i live about 5 min from the facility. he also has an engine dyno.

[BillyGman]

i know this is an old thread...but just for some info i worked at dyno time for awhile...that dyno is legit...and dead accurate...moreso than the roller style. you can fully load the engine which will give you more accurate #s than the roller style which useds a generic weight brake. this is also great for supercharged cars cause full load means full boost. i could never get full boost out of my lightning on the roller dynos. and there is no chance of tire spin. the owners name is greg ploski and hes great to work with. i live about 5 min from the facility. he also has an engine dyno.Thanks for the info. :2thumbs: BTW, it was great meeting you at the dealer! Are your co-workers Marauder fans, or no?

[thePunisher]

yeah most of us are die hard ford fans. keith has a mach 1, i have the 94 lightning, rick has a cobra jet mustang and a 93 lx hatch. sean has an 04 gt. we all love our fords but im the only one with the marauder. we used to be mercury but sold the franchise in 02. now were a heavy truck dealer. ill be chasin ya next season hopefully...im gonna buy reinharts air cooled vortech kit...if theres one engine i know good its the modular fords....nice meeting ya. paul d.,

[BillyGman]

yeah most of us are die hard ford fans. keith has a mach 1, i have the 94 lightning, rick has a cobra jet mustang and a 93 lx hatch. sean has an 04 gt. we all love our fords but im the only one with the marauder. we used to be mercury but sold the franchise in 02. now were a heavy truck dealer. ill be chasin ya next season hopefully...im gonna buy reinharts air cooled vortech kit...if theres one engine i know good its the modular fords....nice meeting ya. paul d., Let me know how everything goes with that Paul. And if there's any info I can help you out with, feel free to send me a PM, and I'll help if I can.