California Bike Dyno Run

[Blue_eyes]

It's a Dynojet, so yeah a inertia drum.

According to Dynojet Mammoth Motorsport has an 250i Dynojet:
http://www.powercommander.com/powercommander/TuningCenters/powercommander_tuning_center_and_dealer_locator_details.aspx?Address=5706 Commerce Blvd. Rohnert Park,CA&ShopOrLocationName=1455&AddressValLat=38.3556914&AddressValLong=-122.712514&ShopType=PC Tuning Center, PC Dealer, Motorcycle Dyno Center

Mammoth Motorsports
Dyno Model: 250i
PC Tuning Center, PC Dealer, Motorcycle Dyno Center
5706 Commerce Blvd.
Rohnert Park, CA 94928

Which is and EDDY : http://www.dynojet.com/motorcycle_dyno/250i_dyno/

Model 250i Quick Features: - The Dynojet Load Control System was developed through years of experience with over 3,900 dynamometer installations worldwide
- The design is easy to operate and provides the function of steady state load control
- Dynojet's Load Control System uses the latest in eddy current power absorption technology, which combines with our easy to use software, so any technician can get repeatable, consistent results

About Mammoth Motorsports on facebook: http://www.facebook.com/mammothmotorsports?v=info

"Mammoth Motorsports is an authorized dynojet tuning center, we have a state of the art Dynojet 250i dyno and have experience tuning all types of motorcycles. We tune both fuel injected and carburetored motorcycles. We have tuned everything from 100k custom choppers to all out AMA pro level race bikes."

Just sayin...



In fact: Dynojet Approved Power Commander Tuning Centers: These centers are equipped with a Dynojet Eddy Current Dynamometer with real-time Air/Fuel Monitor and received advanced training at Dynojet to create custom Power Commander Tunes for your motorcycle using their Dynojet Dynamometer Equipment.

Source: http://www.powercommander.com/powercommander/TuningCenters/powercommander_tuning_center_and_dealer_locator.aspx

So let's please cut all that crap from bashers saying Dynojet are NOT using EDDY current dynanometers for once and for all.

If anyone claims that the Dynojet Approved Power Commander Tuning Centers dyno used is NOT an EDDY current type, please provide proof of that specific case.

 

[Tremor38]

According to Dynojet Mammoth Motorsport has an 250i Dynojet:
http://www.powercommander.com/powercommander/TuningCenters/powercommander_tuning_center_and_dealer_locator_details.aspx?Address=5706 Commerce Blvd. Rohnert Park,CA&ShopOrLocationName=1455&AddressValLat=38.3556914&AddressValLong=-122.712514&ShopType=PC Tuning Center, PC Dealer, Motorcycle Dyno Center

Mammoth Motorsports
Dyno Model: 250i
PC Tuning Center, PC Dealer, Motorcycle Dyno Center
5706 Commerce Blvd.
Rohnert Park, CA 94928

Which is and EDDY : http://www.dynojet.com/motorcycle_dyno/250i_dyno/

Model 250i Quick Features: - The Dynojet Load Control System was developed through years of experience with over 3,900 dynamometer installations worldwide
- The design is easy to operate and provides the function of steady state load control
- Dynojet's Load Control System uses the latest in eddy current power absorption technology, which combines with our easy to use software, so any technician can get repeatable, consistent results

In fact: Dynojet Approved Power Commander Tuning Centers: These centers are equipped with a Dynojet Eddy Current Dynamometer with real-time Air/Fuel Monitor and received advanced training at Dynojet to create custom Power Commander Tunes for your motorcycle using their Dynojet Dynamometer Equipment.

Source: http://www.powercommander.com/powercommander/TuningCenters/powercommander_tuning_center_and_dealer_locator.aspx

So let's please cut all that crap from bashers saying Dynojet are NOT using EDDY current dynanometers for once and for all.

If anyone claims that the Dynojet Approved Power Commander Tuning Centers dyno used is NOT an EDDY current type, please provide proof of that specific case.

Nice research Blue eyes, thanks! I'm glad to learn this was an eddy current machine, because that eliminates a lot of speculation. The OP never stated that the dyno he used was in a Dynojet Approved Power Commander Tuning Center, so I think that's where the speculation was coming from. I'm sure there are still many 'non-approved' centers out there operating Dynojet brand inertia drum dynos. I'm glad this wasn't the case.

I don't think there was any 'bashing' going on in this case.

Was your dyno run done in a 'Dynojet Approved Power Commander Tuning Center?' I'm trying to account for the HP split.

 

[Blue_eyes]

My dynocenter is the EMEA distributor and Research and Development center of Dynojet. The owner distributes and installs all dyno's in EMEA.

Yes, his dyno is top notch, he uses the 250iX.

See: http://www.powercommander.com/powercommander/About/powercommander_about_dynojet.aspx

Netherlands Office Sales and R & D Facility
Dynojet Research BV
Pieter Zeemanstraat 37
6603 AV Wijchen
The Netherlands

Tel: . +31 (0)24-645 40 28
Fax: +31 (0)24-645 60 67

Direct Sales and Technical Support (The Netherlands ONLY)
Tech. Support: eurosales@powercommander.com
Direct Sales Support: eurotech@powercommander.com

The owner is Hans Kerkhoven and I know him very well, he lives in the village next to where I live.


Regarding bashing Dynojet. Some folks on this topic keep posting nonsense about Dyno's without providing any proof or substance. This was not the first time such nonsense was posted on this topic and I have already posted the facts including the links to counter that.
I find that very annoying as others read that crap and pass the nonsence on.

We all are looking for facts, aren't we.

 

[Tremor38]

Regarding bashing Dynojet. Some folks on this topic keep posting nonsense about Dyno's without providing any proof or substance. This was not the first time such noncense was posted on this topic and I have already posted the facts including the links to counter that.
I find that very annoying as others read that crap and pass the nonsence on.

We all are looking for facts, aren't we.

Yessir. In Dynojet's case, I think there is a stigmatism that has developed over the years. This is because of the reputation that their inertia drum dynos put out pie in the sky HP figures....There were also some questionable algorithms associated with their inerta drum dyno hp calculation. This is unfair to all of the legitimate tuning centers that use their eddy current models...but such stigmatisms sometimes die hard.

 

[Blue_eyes]

Yessir. In Dynojet's case, I think there is a stigmatism that has developed over the years. This is because of the reputation that their inertia drum dynos put out pie in the sky HP figures....There were also some questionable algorithms associated with their inerta drum dyno hp calculation. This is unfair to all of the legitimate tuning centers that use their eddy current models...but such stigmatisms sometimes die hard.

Agree, that's why I fight that. The only way to change it is to educate and to post and repeat the truth.

So let's all stick to factfinding, and leave the guess work and the "heard it from a friend of a friend" and once upon a time in the west nonsense behind us.

This is 2012, times change, science advances, update your knowledge.

 

[Tremor38]

Agree, that's why I fight that. The only way to change it is to educate and to post and repeat the truth.

So let's all stick to factfinding, and leave the guessting and heard it from a friend of a friend, once upon a time in the west nonsense behind us.

This is 2012, times change, science advances, update your knowledge.

NO, Dynojet will always suck.....just kidding > O ;D

 

[Blue_eyes]

NO, Dynojet will always suck.....just kidding > O ;D

::025::

 

[markjenn]

Can you post us (links to) these tests you refer to? As I have not come one dyno result (and those were all posted in this forum as well) that did NOT show the dip.... It is great to hear from you that all folks on this forum, all other forums and all the tuners on the globe who have put the effort in to resolve the dip have been hunting a hoax.

Someone just started another thread which posted curves without the pronounced dip. As to the magazines (CW, Motorcyclist, and MCN come immediately to mind), I honestly don't have any interest in finding the issues and scanning the charts so I can bat this around with you as you've made up your mind. But they didn't have any big dips in power. I'm not saying it doesn't exist - I'm simply pointing out that it has shown up in only one test I'm aware of so far.

- Mark

 

[X5]

Someone just started another thread which posted curves without the pronounced dip. As to the magazines (CW, Motorcyclist, and MCN come immediately to mind), I honestly don't have any interest in finding the issues and scanning the charts so I can bat this around with you as you've made up your mind. But they didn't have any big dips in power. I'm not saying it doesn't exist - I'm simply pointing out that it has shown up in only one test I'm aware of so far.

- Mark

Mark, I posted those other dyno charts. Remember though, my bike has the Akrapovic can, and I specifically bought that can to eliminate that dip per the akrapovic website. It utterly eliminated the 2500rpm dip and helped the 4000rpm dip:

 

[markjenn]

Mark, I posted those other dyno charts. Remember though, my bike has the Akrapovic can, and I specifically bought that can to eliminate that dip per the akrapovic website. It utterly eliminated the 2500rpm dip and helped the 4000rpm dip:

Thanks, is this the same chart as your other thread?

- Mark

 

[fredz43]

Mark, I posted those other dyno charts. Remember though, my bike has the Akrapovic can, and I specifically bought that can to eliminate that dip per the akrapovic website. It utterly eliminated the 2500rpm dip and helped the 4000rpm dip:

But we don't know what version of the bike the Akra pipe dyno graph was run on. Odds are that it was on a Euro bike.

I have the Akra can also and my butt dyno told me that it improved bottom end power in all gears, but I wish I had a before/after graph of it.

 

[X5]

Thanks, is this the same chart as your other thread?

- Mark

No, see USA S10 Dyno thread.

 

[Blue_eyes]

Someone just started another thread which posted curves without the pronounced dip. As to the magazines (CW, Motorcyclist, and MCN come immediately to mind), I honestly don't have any interest in finding the issues and scanning the charts so I can bat this around with you as you've made up your mind. But they didn't have any big dips in power. I'm not saying it doesn't exist - I'm simply pointing out that it has shown up in only one test I'm aware of so far.

- Mark

Now, why doesn't that reply come as a surprise.... ::025:: ::025:: ::025::

 

[20valves]

Mark, I posted those other dyno charts. Remember though, my bike has the Akrapovic can, and I specifically bought that can to eliminate that dip per the akrapovic website. It utterly eliminated the 2500rpm dip and helped the 4000rpm dip:

Those dyno charts can't be accurate. The torque and hosepower curves should intersect at exactly 5252 RPM, neither of those do. I think the calculation is hp = (torque x rpm/5252)

 

[Blue_eyes]

Those dyno charts can't be accurate. The torque and hosepower curves should intersect at exactly 5252 RPM, neither of those do. I think the calculation is hp = (torque x rpm/5252)

You're right!

And so is my graph:

 

[tc9988]

Those dyno charts can't be accurate. The torque and hosepower curves should intersect at exactly 5252 RPM, neither of those do. I think the calculation is hp = (torque x rpm/5252)

the power and torque scales are different. thus no intersection at 5252. Also the above formula requires horsepower and lbs feet units for torque

 

[X5]

Those dyno charts can't be accurate. The torque and hosepower curves should intersect at exactly 5252 RPM, neither of those do. I think the calculation is hp = (torque x rpm/5252)

Which dyno charts are you referring too? My dyno charts in my USA thread intersect around 5252 to my eye.?!

 

[markjenn]

the power and torque scales are different. thus no intersection at 5252. Also the above formula requires horsepower and lbs feet units for torque

Correct, the 5252 intersection is an artifact of specific units and plotting such that the numeric scales match (e.g., 70 hp is plotted in the same position vertically as 70 ft-lb). Use different units or different scales and this artifact goes away.

- Mark

 

[20valves]

Thanks for the clarification. I think most 'murcans are looking for ft. lbs. of torque and horsepower rather than newton meters and watts, etc. I'll reference the post where I thought I saw the fishy chart, it looked like hp/tq crossed at 6000+ on one curve and almost 7000 on the other.

 

[20valves]

Mark, I posted those other dyno charts. Remember though, my bike has the Akrapovic can, and I specifically bought that can to eliminate that dip per the akrapovic website. It utterly eliminated the 2500rpm dip and helped the 4000rpm dip:

This was the offending chart, it's in the last post on pp 2 of this thread..