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Thread: K1300S motosports edition

  1. #31
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    been a while since I have been on here and there have been some changes. Sold my 2016 RT and bought a 2019 Gold Wing DCT. I also recently found a full Akrapovic stainless/carbon exhaust used & in perfect shape and a new Power Commander 5 on deep discount. Have not had time yet to install and won,t until I get a baseline dyno done. Hope to get this done late Sept. or early October. Why am I doing this? Because I like tuning and can. For any interested stay tuned.

  2. #32
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    dyno scheduled

    A little later than I wanted but I have a dyno test scheduled for my K1300 next Thursday here in Louisville. This will be the before dyno test of the bike and I will do a after dyno test when the Akra full exhaust and Power Commander 5 is installed. This dyno will include a dyno tune. Hoping for around 175 RWHP.

  3. #33
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    Quote Originally Posted by dynajohn View Post
    This dyno will include a dyno tune. Hoping for around 175 RWHP.
    I'd be very impressed if you get that result. Ideally it would be nice to do one mod (Power Commander), test, then the other mod (pipe). Keep us posted!

  4. #34
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    Quote Originally Posted by BC1100S View Post
    I'd be very impressed if you get that result. Ideally it would be nice to do one mod (Power Commander), test, then the other mod (pipe). Keep us posted!
    I will be too if it makes 175 RWHP, but hope springs eternal. It already has a Bren tune and a slip on muffler and runs very streng now. The reason for not doing in in three steps is that my syno shop (Commonwealth Motorcycles) here in Louisville is so busy with Ducati & KTM builds from all over the eastern USA that I was lucky to get two dyno sessions much less three.

  5. #35
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    Quote Originally Posted by dynajohn View Post
    I will be too if it makes 175 RWHP, but hope springs eternal. It already has a Bren tune and a slip on muffler and runs very streng now. The reason for not doing in in three steps is that my syno shop (Commonwealth Motorcycles) here in Louisville is so busy with Ducati & KTM builds from all over the eastern USA that I was lucky to get two dyno sessions much less three.
    Sounds like these folks have a pretty good idea about what they're doing. Looking forward to your next post.

  6. #36
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    Yes Commonwealth has a very good dyno tuning and testing program. If it is there in the tune they will get it. I walked in on some testing last summer (2018) that was being done with the Indian flat tracker. There was a engineer with the race team there with two brand new Indian flat trackers.

  7. #37
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    First dyno test yesterday. The HP was 154.07 at 9,750 RPM and the TQ was 93.75 ft/lbs at 8,250 RPM. Air fuel ratio was lean for best power running over 14/1 to between 7,750 RPM and 8,000 RPM. The A/F didn't drop into the high 13/1 A/F range until over 8,000 RPM and stayed there all the way to 10,750 RPM. Clearly there is room for improvement with tuning. Best power will be made with A/F ratios from 13/1 to 13.2/1. I hope to get the Power Commander and Akra pipe installed next week and go back to Commonwealth for tuning. This dyno is meticulously maintained because of all the dyno testing that is done here. The weather station on the dyno was reading 69.64 F, 29.70 in-hg, 25 % humidity and the readings are std with a correction factor of 1.01. These are good conditions for dyno testing. When I am done I will post the graphs for those interested.

  8. #38
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    Quote Originally Posted by dynajohn View Post
    First dyno test yesterday. I hope to get the Power Commander and Akra pipe installed next week and go back to Commonwealth for tuning.
    Thanks for the update.

    I am far from an expert on the subject however it is my understanding that a Power Commander will give initial good results which gradually deteriorate due to the ECU readjusting the mixture with info/input from the O2 sensor. Would an AX-FIED mixture control unit be a better solution? It adjusts the O2 sensor signal to the ECU and is a permanent fix. I've used one and its a great solution.

    Above is not meant as a criticism of your plan, just trying to help you get to that 175hp!
    Last edited by BC1100S; 10-25-2019 at 05:16 PM.

  9. #39
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    Thanks for the reply BC100S. I have been using power commanders for tuning since they first became available for fuel injected bikes and I have not experienced what you describe. I don't have any experience tuning with the tuning device you are describing. It sounds like the very early power commanders which modified the signal from the barometic pressure sensor to change the fueling. The latest version of the Power Commanders are the most universally used add on tuning device both by amateurs like me and professional racers outside of the factory race teams. There is a better answer in tuning directly to the ECU which factory race teams use but it has not been applied extensively to the BMW K1300. There is a lot more R&D required to tune the ECU software directly and there is simply not enough market there with the K1300 aftermarket to justify it. DynoJet makes a tuner like this for Harley Davidson which is far more sophisticated than the Power Commander 5 but there is just not enough market to justify the R&D to produce one for the other brand bikes. Too many different models with different ECU's & software that do not share common ECU's like Harley does. Another example is cars where there is a much bigger market. I use a aftermarket ECU tuning program for my 2016 Corvette Z06 which is more sophisticated than anything available in the motorcycle aftermarket.

    That 175 HP I was hoping for is probably just that, a hope, based on the 154 HP the bike has now. The dyno and tuner I am using will be a accurate picture of what is possible because of Chads ability and the accuracy of hius dyno. I know there is more there, just not how much.

  10. #40
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    Quote Originally Posted by dynajohn View Post
    That 175 HP I was hoping for is probably just that, a hope, based on the 154 HP the bike has now. The dyno and tuner I am using will be a accurate picture of what is possible because of Chads ability and the accuracy of hius dyno. I know there is more there, just not how much.
    I think BMW claimed 175 hp at the crank. If one subtracts 15 hp for transmission/drivetrain losses then, allowing for minor deviations, you're not that far off with what you've already seen on the dyno. I'm going to venture a totally uneducated guess and say you'll see an increase up to 166hp after all is said and done. I'm thinking 5% for the pipe and 3% for the Power Commander. Maybe we should start a betting pool.

    I'm curious to see if the increases come on all at once or is equally distributed through the useable rev range.

  11. #41
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    note to anyone who wants to install a power commander 5 on this bike. It is a real job. Everything has to come off the bike for the install down to removing the throttle bodys. The clamps that hold the TB's on had to be cut off with a dremel tool and a cutting wheel. This is no job for amateur mechanics and I could only hazard a guess on how much a BMW shop would charge to install the PC. The Akra pipes were an easy install. Hope to get another dyno session next week.

  12. #42
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    Quote Originally Posted by dynajohn View Post
    Hope to get another dyno session next week.
    Looking forward to it.

  13. #43
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    I do not have time to scan and post the dyno results right now but here are the results. I am using the baseline from the dyno session and the final dyno run on the same day after tuning because both have correction factors of 1.0 which means there was no correction because of temp., humidity or barometric pressure from the STD engineering standard. Before I go into the results that we got let me reiterate that this is on a dyno that is meticulously maintained and the operator is a graduate engineer and in my opinion one of the best tuners in the country. No funny business here just very accurate results. The baseline run (# 002) before tuning with the PC 5 (0 map installed) and the Akra header system on was 152.50 HP at 9,750 RPM and 90.27 TQ at 8,400 RPM. This baseline run was at 2:47 PM and run conditions were 60.94 F, 29.70 in-hg, humidity 33% and the std correction factor was 1.00. The final run after tuning run (# 14) with the PC 5 mapped and the Akra exhaust installed the final results were 158.54 HP 9,750 rpm and 94.48 ft/lbs TQ at, 8250 rpm. Run conditions were 64.68 F, 29.71 hg and humidity was 29%. The std correction factor was 1.00. HP and TQ were up across the entire RPM range. I will try and find time this weekend to post the dyno sheet for run # 2 and run # 14.

    Was this the result I had hoped for, no it was not but it is a realistic accurate result of what can be expected with the best exhaust system available and a professional tune with the DynoJet PC5 on a accurate dyno. The next step will be to take the bike to both a 1/8th and 1/4 mile dragstrip and see what kind of numbers I can get. This may be next spring because of the weather here and the racetracks shutting down for the season.

  14. #44
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    Thanks for keeping us abreast of your results. Like you, I was hoping for more. My takeaway from all your hard work is - BMW seems to be pretty good at exhaust and fuel injection system design/tuning.

  15. #45
    Quote Originally Posted by BC1100S View Post
    Thanks for keeping us abreast of your results. Like you, I was hoping for more. My takeaway from all your hard work is - BMW seems to be pretty good at exhaust and fuel injection system design/tuning.
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