K67 New 2020 " Torque Optimization " RetroFit from Dealer Dyno Results - provided by XWORKS

jimbob8915 said:

So what in the tuning makes the HP loss in the upper RPM ranges?

Click to expand...

Its not hard to match the current dyno runs of 2nd and 3rd gear STOCK to my old datalogs I made back in June 2019.



Its the GREEN boxes that outline the twist grip relationship to the throttle blade relationship. At some point in the twist grip position request of 100% we are expecting 100% throttle blade opening so that maximum performance can be achieved. Here in these pictures we can see that 2nd gear just makes a steady 40% throttle blade while the twist grip position is 100%. I traveled 46 meters at 40% before it the throttle blades started to open toward the 100% which by the time they were at 100% I traveled 132 meters, that folks is 144 yards. A football field and a half of request 100 twist grip, to actually getting 100% throttle blades open.

Remember I wrote alot on this website page for a reason? It also CLEARLY indicates that is the WSBK 2018 test code for Portimao ..this is the best of the best offered to the K67 before EURO4/5 hack and USA EPA hack was put into it. BUT it was a STOCK factory built bike and that means stock exhaust with flapper valve. I wish it was the 206HP at the rear tire that KWS engineering posted for a customer back in August 2019, but the reality is that it is about 195HP at the rear tire. The EURO code is about 192 at the rear tire.

@BMW_388 since you have the most experience w/the BMW ECU and TOM, I was hoping you could help clarify some confusion that I have.

In the current 2023 S1000RR owner's manual, BMW states normal HP is 202 HP @ 13K and TOM HP is 177 HP @ 11.5K.

Above you posted dyno runs in second and third showing max TOM HP @ 13K+ RPM

Questions.

1. When BMW or any manufacture posts HP/TRQ numbers. Are the numbers from a run shifting from 1-6?
2. When BMW says 177 HP @ 11.5K. I'm assuming this is max and HP would start to decrease after 11.5K?
3. Why do all graphs I have seen posted by anyone show HP comparison @ the same RPM? Wouldn't normal or tuned max be at 13K+ while the TOM would max out around 11.5K and decrease from there?

There are many many many variables when it comes to a dyno run.

The variable that most shops have no control over is the temp and humidity of the air being used for that dyno run. These 2 parameters setup the HP and Torque along with the ECU calibration. Air, Fuel, Spark, Compression, Exhaust > RESULT

Then you need to understand the data you are reading. BMW Motorrad does all dyno results at the crankshaft. Not the rear tire. So now we have the other variable drive line lost. Most tuners in the car industry have worked with 12%. Motorcycle chain lost is less, but the issue with motorcycle to motorcycle is the rear tire driving the dyno wheel. The compound, air pressure, and weight, and diameter setup the result from motorcycle to motorcycle on how the Torque more especially will react.

So lets take BMW numbers you have posted for what you call the 2023, but, I have not see this Owners Manual yet, so please post the link to the PDF on this 2023 S1000RR owners manual.

Nominal is typical used to indicate that runs have been made over days and hours upon hours of testing. So 202HP at the CRANKSHAFT with driveline loss of 12HP is what most motorcycle dyno operators will use.. and is what I use. So if you want to read how this debate usually goes > read here < Approximate drivetrain power loss

BMW Motorrad connects the dyno directly to the output shaft of the transmission. So they are not experiencing the chain and tire lost. However, there is lost no matter how you look at HP and Torque measurement and even BMW method is about 12HP. Then Motorrad uses a completely different brand of dyno than what the USA uses. So lets look at what has been determined.

The K67 released 2019 even in the USA, but, it is a 2020 VIN..So we call it the 2020 K67. Using press releases posted here > "OFFICIAL 2020 BMW S1000RR" release info and facts

We see that 205HP was the released number for the K67 2020. I have dyno'ed over 25 K67 on my dyno. Starting in stock ECU and exhaust, stock rear tire, stock gearing, you are looking at 193HP to 195HP at the rear tire. That is very consistent with many other dyno sheets posted over the 2019 / 2020 year of everyone posting results. Cant use BMW Motorrad numbers because of brand of dyno and method of measurement.

So I hope that helps to mostly say that you cannot compare BMW results to any posted dyno sheets from a DynoJet or a Mustang Dyno as this is what 99% of the USA use and it is at the rear tire.

If you take my 203/204HP at the rear tire, and work it forward on the 12HP driveline lost, that is a very nice 215/216HP at the crankshaft. Which is of course what a K67 is expected to do. Add MR12 and you are about 208/210HP at the rear tire.

My ECU has been tested in California and South Carolina at some very well known engine and bike builders for MotoAmerica. The 203/204HP at the rear tire is very consistent across their dynos to mine.

TOM is a completely different long story.