California Bike Dyno Run

[Maybert]

Greetings folks,

I finally got down to have the bike dyno'd this morning. Regrettably I did not have enough time to ask all the questions I would have liked, but I hope this information is useful to you all.

Bike Specs: 7300 miles, PCV + AT, Arrow header, Akrapovic Slipon, CO at +4

The first chart lists power in all 6 gears, descending from 6th on top to 1st gear on the bottom with the least amount of horsepower. There definitely seems to be some limitation on those thirst three gears, but 3rd and 4th are fairly close.

The second chart shows power comparison between S and T modes in 4th gear. One thing to point out is that during the test the max throttle opening is limited (not just slowed) in T mode. It was limited to 50% in first gear and to 80% in 5th and 6th gears.

The tuner seemed to think he could get a few more HP and smoother delivery over the AT, so I will probably be back in a few weeks to do it again.

New tires yesterday, dyno run today, and a weekend of dirtbiking ahead. Hot damn! ::018::

 

[~TABASCO~]

Would you mind sharing your PCV map and your AFR cell sheet ? I know people from around the country like there bike set up for what they feel is the best for them... Can I ask why you have + 4 on your CO with the PCV & AT ? Or could you tell us how the +4 helps you with your set up verses not running any CO ?

Reason I ask, I have run "+" numbers on the CO, and my bike with my PCV map seems to work better with the CO on -0-..... Thanks

 

[Maybert]

No problem Jaxon, I'll try to post the Fuel and AFR maps tonight when I get home.

As for the CO, I have been playing around with it for a week or so. I ran the PCV without any CO for a while after I installed the AT a month ago. I reintroduced the CO at +6 about a week ago and I could feel a definite bump in responsiveness. I lowered it to 4 yesterday and it still felt good. The tuner did suggest that when I bring the bike back to set it the CO at 0 for tuning.

 

[Blue_eyes]

That's weird. I would have expected at least 100 HP. Was traction control switched off?

I had my bike on the Dyno when it only had the Akra slip-on, K&N and PC-V (so without the Arrow headers, AutoTune, Diapason ECU it has now) and this is the graph:

 

[stevepsd]

That's weird. I would have expected at least 100 HP. Was traction control switched off?

Blue_eyes:

It looks like your Dyno run was done using DIN horsepower, whereas Mayberts' was done using SAE corrected horsepower. Don't know how the DIN '4' data smoothing on yours compares to Mayberts' SAE '5' smoothing.

To convert your DIN HP to SAE divide the DIN HP by 1.0139 to get SAE, so your 100.15 DIN HP is 98.77 SAE HP.

Still a big difference between the two bikes, but then you get into the whole dyno calibration, corrected temp & pressure, etc to even try and compare results from different dynos.

 

[Maybert]

That's weird. I would have expected at least 100 HP. Was traction control switched off?

Honestly I was hoping for more too, and yes TC was off. I suspect it may be a difference in dynos or any number of other factors. Either that or my bike was somehow neutered! :'(

I'll be back for redo in the next few weeks, so we'll see if maybe the dyno was having an off day.

Or maybe....

our horses are just bigger?

 

[Tremor38]

Greetings folks,

I finally got down to have the bike dyno'd this morning. Regrettably I did not have enough time to ask all the questions I would have liked, but I hope this information is useful to you all.

Bike Specs: 7300 miles, PCV + AT, Arrow header, Akrapovic Slipon, CO at +4

The first chart lists power in all 6 gears, descending from 6th on top to 1st gear on the bottom with the least amount of horsepower. There definitely seems to be some limitation on those thirst three gears, but 3rd and 4th are fairly close.

The second chart shows power comparison between S and T modes in 4th gear. One thing to point out is that during the test the max throttle opening is limited (not just slowed) in T mode. It was limited to 50% in first gear and to 80% in 5th and 6th gears.

The tuner seemed to think he could get a few more HP and smoother delivery over the AT, so I will probably be back in a few weeks to do it again.

New tires yesterday, dyno run today, and a weekend of dirtbiking ahead. Hot damn! ::018::

This is VERY useful info...thanks. Now all of the statesiders can be sure they have the power restriction. Since I didn't see BHP listed anywhere, can we assume this was done on an inertia drum dyno? Thanks!

 

[stevepsd]

This is VERY useful info...thanks. Now all of the statesiders can be sure they have the power restriction. Since I didn't see BHP listed anywhere, can we assume this was done on an inertia drum dyno? Thanks!

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

 

[Tremor38]

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

Not necessarily. I used to assume that, but all of the newer 'Authorized Dynojet Tuning Centers' have eddy current dynos.

 

[Desert Dave]

::012::
Thanks so much for this info, exactly what I wanted to see, and backs up my feelings on this motor. None of the local dealers have a Tenere in stock right now or I might have to change my plans for tomorrow

You guys that are dissapointed in the numbers, who cares? You know what you feel. I'm fine with an honest 90 something HP at the rear wheel. Seems that often a slip on and basic fueling tweaks make a bike feel twice as powerful, when in reality you gained a couple of ponies on top and smoothed out the power curve everywhere else. Doesn't mean much without a baseline run anyway. Just glad to see the restriction finally verified in the U.S.

 

[Maybert]

This is VERY useful info...thanks. Now all of the statesiders can be sure they have the power restriction. Since I didn't see BHP listed anywhere, can we assume this was done on an inertia drum dyno? Thanks!

Good question, I had no idea there were other types until you asked this question so I looked it up.. and yes it was an inertia drum. I learn something new every day thanks to this wonderful forum

 

[fredz43]

Thanks for having the runs done and posting the graphs here. One thing that puzzles me is the big difference (16 HP?) between S and T modes. Recall that in the recent test in MCN, they showed 91 HP in each mode. Also I don't see the big torque dip between 4,000-5000 that we have seen in the Euro graphs. That is the area that the reflash's seem to improve the most, with a 20 HP boost.

Am I looking at these graphs correctly?

 

[Maybert]

Thanks for having the runs done and posting the graphs here. One thing that puzzles me is the big difference (16 HP?) between S and T modes. Recall that in the recent test in MCN, they showed 91 HP in each mode. Also I don't see the big torque dip between 4,000-5000 that we have seen in the Euro graphs. That is the area that the reflash's seem to improve the most, with a 20 HP boost.

Am I looking at these graphs correctly?

From what I gather the Arrow headers seem to help with that torque dip a bit. As for the difference between S and T in 4th gear... not sure. Didn't have time to compare other gears in S and T before heading back to work

Have a nice weekend folks, I'm off to prep my DRZ for a weekend of falling off a lot ::025::

Per your request Mr. Jaxon, here are the maps:

 

[Tremor38]

Thanks for having the runs done and posting the graphs here. One thing that puzzles me is the big difference (16 HP?) between S and T modes. Recall that in the recent test in MCN, they showed 91 HP in each mode.
Am I looking at these graphs correctly?

I'm kicking around one of two hypothesis. 1. MCN used a brake type dyno, so we saw the HP at a stabilized RPM...the question would be whether a 20% restriction in TB opening would account for 12 hp. 2. MCN trusted what Yamaha said and just fudged the number rather than doing another pull .

 

[markjenn]

We've had a lot of dyno results published by a lot of magazines and none are showing the big torque "dip" that one result showed. It might be an anomaly of that single test. And the magazines are showing pretty consistently low-90's, so I wouldn't be distressed if any particular dyno test isn't getting up near 100.

As someone else pointed out a while back, it is possible that the apparent difference between S and T in peak power might just be an artifact of an inertia dyno spooling up and the heavy damping the T mode seems to introduce in the throttle response. A test to determine if S and T peak power is different would be simply to do back-to-back top speed runs in the two modes. I plan on doing this, but it will have to wait until a spring tour when I can ride the bike in remote areas where you can (sorta) safely do this sort of thing.

- Mark

 

[Blue_eyes]

From what I gather the Arrow headers seem to help with that torque dip a bit. As for the difference between S and T in 4th gear... not sure. Didn't have time to compare other gears in S and T before heading back to work

Have a nice weekend folks, I'm off to prep my DRZ for a weekend of falling off a lot ::025::

Per your request Mr. Jaxon, here are the maps:

Looks good. Nothing out of the ordinary. I have the same 13.2 map now.

Enjoy getting back up the DRZ! ::001:: ::26::

 

[Blue_eyes]

We've had a lot of dyno results published by a lot of magazines and none are showing the big torque "dip" that one result showed. It might be an anomaly of that single test. And the magazines are showing pretty consistently low-90's, so I wouldn't be distressed if any particular dyno test isn't getting up near 100.

As someone else pointed out a while back, it is possible that the apparent difference between S and T in peak power might just be an artifact of an inertia dyno spooling up and the heavy damping the T mode seems to introduce in the throttle response. A test to determine if S and T peak power is different would be simply to do back-to-back top speed runs in the two modes. I plan on doing this, but it will have to wait until a spring tour when I can ride the bike in remote areas where you can (sorta) safely do this sort of thing.

- Mark

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.

http://www.yamahasupertenere.com/index.php?action=dlattach;topic=2224.0;attach=3390

http://www.yamahasupertenere.com/index.php?topic=2224.msg55877#msg55877

http://www.yamahasupertenere.com/index.php?topic=2224.msg42677#msg42677

 

[Tremor38]

As someone else pointed out a while back, it is possible that the apparent difference between S and T in peak power might just be an artifact of an inertia dyno spooling up and the heavy damping the T mode seems to introduce in the throttle response. A test to determine if S and T peak power is different would be simply to do back-to-back top speed runs in the two modes. I plan on doing this, but it will have to wait until a spring tour when I can ride the bike in remote areas where you can (sorta) safely do this sort of thing.

- Mark

We would have to keep in mind that a top speed run would only apply to gears 5 and 6. I have no reason to believe that the dyno operator or the OPs information was inaccurate about the throttle position being limited to 50% in 1st gear and 80% in gears 5 and 6. That 20 percent TB restriction in the upper gears may or may not have a large effect on top speed. If it does affect the top speed, that would make MCN's results even more confusing.

For the people who have Power Commanders, there appears to be a 'live channel' where you can view the 'TP%.' I'm surprised noboby has fired up their PC and cranked open the throttle to see how far the TB's will open in the different gears. I would think this could be accomplished without starting the engine. If somebody has already tried this, please let us know, so I can stop sounding like a broken record

 

[Blue_eyes]

We would have to keep in mind that a top speed run would only apply to gears 5 and 6. I have no reason to believe that the dyno operator or the OPs information was inaccurate about the throttle position being limited to 50% in 1st gear and 80% in gears 5 and 6. That 20 percent TB restriction in the upper gears may or may not have a large effect on top speed. If it does affect the top speed, that would make MCN's results even more confusing.

For the people who have Power Commanders, there appears to be a 'live channel' where you can view the 'TP%.' I'm surprised noboby has fired up their PC and cranked open the throttle to see how far the TB's will open in the different gears. I would think this could be accomplished without starting the engine. If somebody has already tried this, please let us know, so I can stop sounding like a broken record

You are absolutely right Tremor. But for the PC V folks among us, the engine needs to be running in order to see the TP% (just tried to be 100% sure). And I am not going to crank my throttle open with the engine running in my garage. Thagua has the Dynojet LCD which allows him to view the TP% online while driving, so he should be able to provide us that info, if only he got his AT back working again.

Thagua, can you provide the requested info on TP% in the various gears and bot T and S more. However Thagua has had his ECU tuned, so his results may (or should) differ from stock ECU's.

 

[Tremor38]

You are absolutely right Tremor. But for the PC V folks among us, the engine needs to be running in order to see the TP% (just tried to be 100% sure). And I am not going to crank my throttle open with the engine running in my garage. Thagua has the Dynojet LCD which allows him to view the TP% online while driving, so he should be able to provide us that info, if only he got his AT back working again.

Thagua, can you provide the requested info on TP% in the various gears and bot T and S more. However Thagua has had his ECU tuned, so his results may (or should) differ from stock ECU's.

Ahhh, so the engine does have to be running. No wonder nobody has tried. Yeah, too bad I didn't think to ask Roberto about that BEFORE he got the flash done. ::025:: Hopefully they didn't mess with his T-mode at all.