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Superbike School Riding Coach
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Posts posted by Timmer

  1. Spaghetti,


    From my experience, most bikes make their best power when they run an air/fuel ratio of 13:1.


    When you enable Autotune there should already be some values in the "Target Air/Fuel" table, so you shouldn't have to mess with it if you don't want to. You will probably see values in that table that range from 13:1 in the high throttle/RPM range to 13.5:1 or so in the lower throttle/RPM range. We normally map bikes slightly leaner in the low throttle/RPM range so that you get better gas mileage when you are just cruising on the highway.


    I've posted some more info about air/fuel ratio in this post if you are curious....


  2. Hey Spaghetti,


    The answer to both of your questions is YES.


    Autotune works in real-time, so it will richen/lean the mixture for any changing conditions WHILE you ride. When you go to turn it on(using the Power Commander software), you will see a "Target Air/Fuel" table that gets added to the map. This is where you tell Autotune the air/fuel ratio that you would like to shoot for. You can adjust this table to run different air/fuel ratios for different areas of the map. From there all you need to do is go out and ride. Autotune will do the rest of the work.


    Hope that helps!



  3. I have mixed emotions about this as well.


    I recall going to the WSBK race at Miller Motorsports Park in Utah. I was observing both races from the last turn before the front straight. When the pack came through on the first couple laps, I noticed the front-runners(Checa, Biaggi, and Camier) were using little to no traction control as they exited the corner. However, when the last few guys in the pack came around you could noticeably hear the "bup-bup-bup" of their traction control, and it was A LOT. Toward the final laps I could hear more traction control from the front-runners, but it was still not nearly as much as the guys in the back of the field.


    Traction control can be very useful in helping the rider, but in order to do this effectively it must be taught exactly what to do in every situation. This is the tough part for all the guys with the laptops that you see at the MotoGP and WSBK races. That being said, I think there are definite advantages to traction control. For riders that are not very familiar with where the limit of traction is, it provides a softer gradient for discovering the limit.


    In the end, I think it depends on what the goal is when using the traction control. Is the goal to aid the rider when he makes small miscalculations with his throttle control, or is it to replace his bad throttle control with electronics?


    Just my two cents....

  4. Hey Palephase,


    I agree with Robert. This sounds like you may have a bad or mis-calibrated sensor, or some loose connections in the wiring. You might also check to make sure that none of the ECU wiring is worn through and shorted to the frame somehow.


    In answer to your tuning question...All ECU's have a "map" in the background that runs the fueling(and ignition). The O2 sensor just supplements this to make sure that the fueling is very well controlled for emissions. On most bikes the O2 sensor isn't even used by the ECU in the higher throttle and RPM ranges. If an O2 sensor goes bad, the ECU is usually able to detect this. If the ECU detects a faulty sensor it will usually throw an FI light on the dash and revert to using the background "map" only.


    All O2 sensors must be heated in order for them to work properly. Some sensors have a heater built into them, while others use the hot exhaust gas for there heating. Your VFR has the heater built in. When you install the Dynojet O2 Eliminators, it fools the ECU into thinking that the O2 sensors have not heated up yet. The ECU's response to this is to use its fueling map in the background only. This is what allows the Power Commander to change the fueling throughout the entire operating range of the bike.


    I hope this sheds a little more light.




  5. Why do motorcycle manufacturers only provide a single narrow band O2 Sensor?


    From what I understand these only provide AFR's to the ECU within a specific Throttle % / RPM range.


    Wouldn't it make sense to have a sensor that reads the entire range?


    Good question tunnelvision748.


    The reason why manufacturer's only use a narrowband sensor(and only use it in a certain range of Throttle % and RPM) is because of the emissions standards that they have to conform to.


    From what I have heard, emissions standard organizations(CARB for example) are really only interested in the emissions of the bike under "highway cruising" conditions(lower Throttle % and RPM) because that is where street riders spend the majority of their time while riding. They want the "cleanest" burn for this riding condition. The "cleanest" burn that they can get is an air/fuel ratio of 14.7:1, which is exactly the air/fuel ratio that a narrowband sensor measures. Narrowband sensors are also MUCH cheaper than a wideband sensor which can measure the entire air/fuel range.


    I wouldn't be surprised to see more wideband sensors on bikes as sensor technology gets better and cheaper.


    Hope that answers it for you. Let me know if you have anymore questions.




  6. Hey Shakabusa,

    I'm definitely trying to keep the info I post as basic as possible as I know it can get complicated real quick. It's a tough gig for me because some guys have quite a bit of experience with this stuff, while others don't. If you have any questions about anything I have posted, please let me know and I'd be happy to clarify it the best I can.


    I'm happy to hear you are thinking about going with a PCV for your bike. In answer to your question about the Autotune...yes, if you get the Autotune there is really no need to get your bike dynotuned unless you want to see horsepower numbers.


    I have heard mixed reviews on the ECUnleashed stuff. Some guys feel a big difference, while others don't. The things that ECUnleashed is able to modify varies from bike to bike, and I'm not sure what they can do for the S1000RR.




  7. Hey Laura!


    I believe you're right about the CAN bus on the S1000RR. I don't think there is a single wire that feeds the RPM to the tach. I believe it uses CAN communication for this. If there is a single wire for this, I don't know what it is.


    Wrapping a wire around a coil wire for an RPM signal usually works best if you can wrap it around a wire on the secondary side of the coil(the spark plug wire). The wrapped wire around the spark plug wire picks up the change in the electrical field as the high voltage pulse goes down toward the spark plug to fire it. The S1000RR has a "stick coil" or "coil on plug" which has no spark plug wires, so this is not an option. You only have access to the primary side of the coil(side connected to the ECU), which is much lower voltage.


    Another thing about the S1000RR is that it has 3 wires going to the coil. Other bikes typically only have 2 wires...power and signal. The 3rd wire on the BMW is for a feature they use called ion sense. I won't get into the details of ion sense, but this could be why you can't get a good signal when you wrap the wire around the bundle of wires going to the coil. Your RPM pickup wire could be picking up the ion sense signal as well, which will throw it off for sure.


    Look at the picture I've attached of the coil connector on the S1000RR. This is the connector that plugs into the coils. The arrow in the picture is pointing out the SIGNAL wire location on the connector, which is the one you want. It is labeled as "1" on the connector.


    If you can, pull this wire away from the bundle of wires and ONLY wrap your RPM pickup wire around that wire. If that doesn't work, you might be able to splice your RPM pickup wire directly into it. You might want to ask Starlane if this is Ok though.


    Hopefully that helps a bit. Let me know how it goes.





  8. Hey Ozzy,


    A couple things here...


    First off, make sure that your K&N filter is not over-oiled. Too much oil can restrict air flow, which can make the engine run hotter and also result in less horsepower. You might try changing your air filter back to the stock filter to see if the overheating goes away. This is a pretty common problem I've seen.


    Second thing...The map you have installed for a Two Brothers slip-on with stock air filter should get the fueling pretty close, but you can adjust the map further if you would like. You can use the Power Commander Control Center software to make adjustments, which you can download from www.powercommander.com. Connect your Power Commander to your computer using a USB cable. Open the software, and then select the region of the map that you would like to add a little fuel to by clicking and dragging. Then click the "Page Up" button on your keyboard. This will increment the cells that you have highlighted, adding fuel in only that area.


    Also....if you've got the cash, you can order an Autotune kit. This will allow you to pick the air/fuel ratio that you want and the Power Commander will automatically zero in on this air/fuel ratio as you ride. It will also allow you to check your air/fuel ratio in the Power Commander software.


    Hope that helps. Let me know if you have anymore questions.




  9. problem with the iphone and most of the non-pro stuff is that its 5mhz gps. The dedicated data acquisition stuff is 10mhz (10 updates per second) and some of the really pro stuff is 20mhz. At 100mph, 5 updates per second is 30ft. at 10mhz, that drops to about 15ft - which is generally enough to work with. Thats a huge difference.


    Granted - its good to get started at that level. But once you enter in with the better stuff its night and day.


    In terms of cost - yes, about $1200 to start with the Aim stuff - which you get quite a bit. Video data over lay requires use of their camera's which is 1k. Or you can get the camera's and tie into the ecu for around $1200. You get whatever you want to overlay, but no logging of data.


    But one of the reasons that I say the school should do it is because its out of reach for most people (or out of what they want to spend). That way it has more value. If the school could give you a video (forget the actual data analysis, just video with data overlay) - you can study your own braking zones, braking pressure, your throttle positions, your gyro/lean angles, etc - would you be more inclined to not miss that camera session on bike ?


    Because I would say half of the Level IV's just skip the camera bike right now.


    Good points anthem for sure. I'll ask Keith, Dylan, and Cobie what they think about it.


    Once you get everything set up on the bike, is it pretty quick/easy to do videos? The reason I ask is that we already have to hustle a bit to get the videos done for ALL the students that ride it. It would make it tougher if we had to add more time to that whole process during a school day....

  10. Awesome info guys!


    ktk_ace - Awesome info on traction control! Those are great articles. Since traction control is slightly different than data acquisition(and more complex), I'm thinking maybe we should start a separate post for it? :)


    anthem - Love the videos! That's really neat stuff. I think it could be very useful on the camera bike for any student Level. We like to get students on the camera bike because we can show them EXACTLY what they're doing. Having that data on the screen would give even more info about what is going on.

  11. Good point anthem. It think it would be cool to have a little bit of data acq stuff on the camera bike, although we can already pick up a lot of things from just the picture and sound of the video. Keith has expressed some interest in it, but most of the systems out there are complicated and expensive.


    Thanks warregl. I'm fascinated by that stuff too. Good question on what data acq systems guys are using. I'm interested as well...let's keep that discussion going! :)


    What data acq systems have you guys heard of?

    What data acq systems are you using?

  12. Here are some cool pics of the Attack Performance MotoGP bike. It starts to give you an idea of how serious these guys are about getting data on what is happening on with the bike.


    attack_crt1.jpg shows the main connection point of all the wiring harnesses from various sensors coming into the back of the display. There are a few of them. Haha.


    attack_crt2.jpg shows the front of the swingarm where they have mounted 3 infrared temperature sensors which they use to measure tire temperature. They can measure the temperature of the tire in the middle, as well as either side.


    attack_crt3.jpg shows the steering damper they are using. On top of the steering damper they have mounted a potentiometer which measures the distance/location of the steering damper. They use this to roughly measure the steering angle.


    Anyway...just thought this was cool stuff and figured I would post it up. I'll post up any other pictures I find related to this stuff.


    If any of you guys find pics showing this stuff, post them up! I'd love to see them.






  13. In case any of you are wondering how your bike engine makes that power that gives you endless grins....


    Below is a link to a cool video I found that shows exactly what is happening in the combustion chamber of a 4 stroke engine.



    You can see the intake valve on the right, the exhaust valve on the left, and the spark plug in the middle.



  14. Laura...I live in Montana...whats a TV? Don't know what you Californians do for a workout, but we wrestle buffalo up here! Haha


    Seriously though...one thing I'm curious about is taking protein. I have taken some in the past(whey protein I think) to support my muscles. The suggested doseage on the package was tough to stomach and it left me feeling bloated all the time.


    I'm curious if taking protein really helps, and if so what kinds are good and how much?


    Any recommendations Doc?

  15. Hello Dr Price,


    I have a pretty rigorous workout routine(combo of weightlifting and a lot of running) and want to make sure that I provide my body with the proper nutrients for my muscles, joints, and heart.


    Researching this stuff on the web, there is a lot of varying opinions about what supplements to take, what form to take them in, and how much to take.


    So my first question is....What are the most important supplements to take for proper muscle, joint, and heart health?

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