Now you are saying that with the 1000's upon 1000's of hours put into the development of the K67 engine, you are going to be better than BMW Motorrad and come up with a smooth bore velocity stack that makes more power than BMW Motorrad posted. IF you are going to do a smooth bore stack you are in competition with what BMW Motorrad already designed. We dont have direct port injection on these motorcycles 'yet'. It creates turbulence which keeps the fuel atomization from collecting on the walls. There is a roughness for the intake side for a reason. Porting of the intake side of a cylinder head is not mirror smooth. What this does is create a vortex effect in the air flow which is suppose to create velocity of the air and turbulence. It is as you would want a diagonal line cut from top of flow to bottom of flow. Wish I could find all those pictures I had of those things laying out when I got ready to sell off all my GSXR parts back in 20.Īlpha Racing does have some CNC machines I have seen in some pictures of their shop area, but it is my guess that they do not actually make these velocity stacks in house either. I spent 100's of hours testing with various lengths of smooth bore stacks. I had these smooth bore velocity stacks on my GSXR engines. Smooth bore is NOT what you want for performance. There is nothing complicated about smooth bore. That piece of aluminum requires a CNC lathe and it is smooth bore. They get others to make a part and brand it BT Moto. What do these do? Then there is the M1000 Air box throw into the bragging HP numbers.īT-Moto does not produce a part in house. What I prefer to say is that KWS will dyno 208HP and Exotica MotorSports will dyno 203HP and somewhere between that 203 and 208 is my dyno number HP at the rear tire. So I typically dont brag that my DynoJet reads 2HP off and if I am seeing 203HP on the dyno graph at the rear tire, I could say, well, that is really 205HP because I am light 2HP. Keith explained they make one recalibration attempt per DynoJet setup and since I brought mine brand new, that is all I get.
Velocity stacks code#
If they send the first DAT file, and it is XX HP off on calibration, and they turn around and send a 2nd DAT file with the 2HP calibration change, I can use a hex editor to go into the file and actually hack the hex code to another calibration number based on trial and error of trying, but, the most important part is I know the hexcode location of the data I need to change because on the 2HP change would be in the 2nd DAT file. They make one attempt and whatever they hit on is what you get. My dyno is rated at 2HP off on the light side and verified by DynoJet, but they wont send another calibration file to my RT data box. oh my gosh, the manhood measuring contest to brag about HP. The New BMW S1000RR Superbike Is Finally Here Bingo on my dyno, I have done many stock K67 with CAT and exhaust, stock ECU, and it is 193 to 195HP all day. The math reads 205-12=193HP at the rear tire. as cars is rated even higher and should be. So taking the typical 12HP lost of driveline on MOTOCYCLE.
Velocity stacks full#
If you increase HP by alot across the spectrum of RPM, you are going to lose torque somewhere, and thankfully unless your tune in the ECU is really bad, it would be actually bad to say you increased HP across the whole RPM range.īMW Motorrad did not give us that bad a tune over the full RPM spectrum once you are pass 2nd and 3rd gears.
Velocity stacks how to#
You guys are so stuck on measuring your HP because that is all people really know how to perceive performance. So I am putting down 203HP with really the best number being the torque. I have stock IAT location, my intake flapper doors were in the open position all the time, and I have stock air box and stacks. So lets look at my dyno sheet for my race flash I just call it V2.
Mule 3 is 2022 engine and even the 5Z0 new ECU package from BMW Motorrad. I have owned it one year and it only has 1450 miles still.īut come October when the air is dry and cooler in TEXAS, I will take my M1000 air box off my bike and dyno it on my S1000 Mule 3 and Mule 2. Never had the desire to take it apart much less ride it much. So my dyno has had 10 different K67 bikes on it since 2020, and I have personally owned 5 different K67 since June 2019 to dyno as many times as I want at the various times of temperature and humidity. So my Mule 2 is going to see from a peak number of 203HP to 207 / 209HP, but more important your claim is across the board ( dyno chart ). Even if you are talking BHPġ Horsepower = 0.986 320 070 619 53 Brake horsepower Click to expand.claiming 4 to 6 HP ( SAE ) across the broad is a false statement.
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