Lets Make a DYNO with ARDyno - Part 1 - J's Garage - YouTube The radius of the roller is 0.979 feet so the torque accelerating the drum is 6.76 lb-ft. All thats left then is to make a dyno pull on the falling weight then adjust the inertia value until the graph shows 6.76 lb-ft of torque. This is a DIY motorcycle dyno that I've built. ... or a Motorcycle roller set 1 roller a DKK 14000 1 "homebuild" frame 1 electronic a DKK 16000 To simulate that inertia with a 23.5 diameter roller, it would need to have a polar moment of 14.9 lb-ft-sec²; (500 * 23.5²) / 18522 = 14.9. What we measure is the time between two signals. It took him like two days to put this together then it sat in my garage for six years until I got around to doing my part. I had planned to go further and expand the program to eliminate Excel but for now Im happy with this setup. I tried that but wasnt confident with results since it was reliant on my reflexes with the stopwatch. The only dyno line that expands with your needs. The current one is kind of flimsy and we have to unbolt it, drill new holes, and bolt it back down to adjust for wheelbase. Dynoteg dynamometers & components Dynoteg has specialised in dyno's for kart, car and bike since 1998. What if I told you that its possible [with the help of friends and family] to build a dyno for less than you would pay for a dyno tuning session? Weather Watch: Weather station for 'stand alone' track tuning or as DYNertia3 interface. The wheel chock definitely needs some work. It doesnt get hot at all. Featuring a front wheel lock to keep the bike safely in place, it can measure up to 750hp and 200mph. The only calibration for an inertia dyno is figuring out the inertia of the roller and plugging that into the software. I had the technical stuff figured out but couldnt come up with a roller. Whether your bike is stock, heavily modified or created for high-speed racing, our Jet kits can tune your air/fuel ratio to perfection with immediate results. I also doubled the farad rating of the capacitor in the timer circuit to keep the timing roughly the same. I've heard that you can make a sudo brake dyno using a electrical load and a generator as a roller. The dyno he built is an intertia dynamometer, which means it’s the more common type where a drum is accelerated by the motorcycle’s rear wheel. I welded a single tooth to the drum and mounted a magnetic pickup to the frame so it will send out a signal once per revolution. This weight will be subtracted from the test weight to determine how much weight is accelerating the drum. Then I could open the CSV in Excel to do all the math stuff. Later mount an absorber, expand to AWD, add channels, upgrade software, etc. It took him like two days to put this together then it sat in my garage for six years until I got around to doing my part. Moto Works Denver will offer full service repair and maintenance services but will also be providing DIY workstations and workshops. Aug 12, 2010 06:35AM. I put this on an MP3 player plugged into the microphone jack of the computer to test the software. I thought I was going to have to add a heat sink to it, but just having it mounted to a metal box out in the open is good enough. You can find all kinds of equations online for calculating the inertia based on the dimension and material of the roller. It has given reliable service ever since. I was talking with my cousin Lucas one day about building a dyno. - Imlay City, Michigan 810-798-2035 He got the roller, with bearings, for $20. ***NOTE***- Please be aware that this dyno has the capability to generate some serious electricity. – without wasting your original investment. If it starts falling without a nudge then its too heavy since static friction is greater than kinetic friction. The biggest challenge was balancing the roller. But again, we wont measure it directly. Measuring the torque and factoring in RPM you can extrapolate horsepower. Inertia and brake (open loop) dynamometer systems for inexpensive DIY dyno construction or upgrading of existing dyno's. When you record how fast the drum is accelerated through the rpm range, a measure of torque, you now have both torque and rpm throughout the range. In addition, they produce a heavy air flow at a high volume. DIY. Subtract 1.6 from 8.5 gives a net weight of 6.9 lbs. These symbols aren't entirely correct either, until I find the correct character set they'll have to dofor now. This is dangerous shit! What I did to eliminate the human error was to simply make a dyno pull on the falling weight. DIY dyno kits Do you prefer to build your own DIY dyno or do you want to upgrade an existing chassis dyno with modern dynamometer electronics & software? You can run this instead of WAVdyno.exe but it does require Python2.7, as well as pyAudio and pySerial (all free downloads). Acceleration tests are easy to operate from the Sportdyno software or by the supplied start button. To make it work, I wired the motors in series and ran it on 240 volts. When this video was shot we only had about $70 (and months of labor) into the dyno. No problem, at Dynoteg we have great solutions for that. If you have any questions or comments The data logger can read any sensor with a 0-5 volt signal. I bought a sheet of OSB for the deck and added the wheel chock which was given to me by a coworker. The roller isnt as heavy as I would like. This takes a bit of trial and error. That works alright for a simple flywheel but not for my hollow drum of unknown thickness. I'm In the process of calibrating it... A calibration coast down test vid will follow soon. I bought a … Start today with a low-cost inertia-only model. With the auxiliary sensor mounted I hung weight on the line to figure out how much force is required just to turn the drum. Authorized Power Commander Tuning Center. Ive got a few ideas on how to do it but it hasnt been a big enough priority to warrant spending any time or money on it. If I welded that to the side of the roller then it would bring it up to around 12 lb-ft-sec², which is better but still low. I picked up a set from the local motorcycle shop when they were on sale for $25. The next step was to eliminate the data logger and plug the pickup [with clipping diodes across the leads] into the microphone jack on the computer. I would record the run with the data logger then save it in a CSV format and open it in Excel to do all the math and create a graph. We manufacturer all major components in house – saving you third-party markups of competitors. Inertia dynos dont measure torque directly like brake dynos. DynoCalculator.xls is the Excel workbook that processes the raw data from the command line recorder and creates the table and graph for the run. If you do build your own dyno then you do so at your own risk. The hockey puck spins 7-3/4 times per revolution of the roller and the distributor puts out 8 signals per revolution, so I end up with 62 signals per revolution of the roller. Dynos using car brakes are also possible for lower HP applications. If it doesnt make it all the way to the floor then its not heavy enough. I recorded the runs with Windows Sound Recorder and saved them as a WAV file. Many many years ago I was at a motorcycle dyno shootout day and thought I could build one of these. DataLog.ino is the "sketch" for the Arduino Uno. The capacitors in the light dimmer were only rated for 200 volts so I replaced them with 500 volt caps. I had the technical stuff figured out but couldn’t come up with a roller. We’ll take a look at it and point out some shortfalls that we can all learn from. WAVdyno.zip contains WAVdyno.exe and all the files it needs to run. He also scored the metal for the frame from my Uncle Jeff and designed and built the frame. Dynojet remains committed to the needs of the Powersports and Dyno community. Again, Ive got some ideas on what I want but havent got around to making it. 530 were here. It can be hard to get the dyno going- there is a fair bit of inertia between the rollers, motor, and the flywheel on the motor. This wouldnt work with the one-signal-per-revolution sensor on the roller since I will get less than two revolutions before the weight hits the floor. The triac inside the dimmer is rated for WAY more than 5 amps but they de-rate it since its normally mounted in a wall with no heat sink. For the actual dyno pull I used an 8.5 lb barbell weight. The total cost of the mechanical parts for this dyno was only around $200. ryan m / noobster. The leaf blowers are obnoxious at full speed so I wired them through a light dimmer to vary the speed. In the automotive … In my case it took 1.6 lbs. Balancing machines . The purpose of a PAU is to absorb energy developed by the engine and convert it to torque. The product that started the Dynojet fuel tuning legacy, our motorcycle Jet Kits will increase your power and smoothness throughout the entire rev range. In the case of a performance testing dyno, a direct nozzle connection could affect the performance results of the vehicle being tested. DIY motorcycle dyno coast down test The coast down test is a means of measuring bearing friction and any other 'losses' such as air drag that have to be accounted for in order to achieve accura... Executive Lecturn with side flaps Thanks to DYNertia3 the answer to the high cost of Engine / Chassis Dyno’s is at hand - build your own DIY Inertia and/or 'open loop' Brake Dyno! For another $110 I built a cooling system using two leaf blowers. The command line dyno program was modified to record the data logger values during the run. This is where all the big money is spent. I've read about a guy that spent buku bucks making a inertia dyno for his street bike that had like a half ton machined roller. Bike is tied to the dynamometer by the front wheel through a clamp that can be moved ahead and back with the purpose of fitting the position of the back wheel. He also scored the metal for the frame from my Uncle Jeff and designed and built the frame. D100 Dynamometer (see above for details) TCA100 torque calibration arm assembly (metric or imperial, weights not included) (Note: dyno … Dynamometer consists on a metallic structure in which the bikes are placed through a ramp. Many workshops would like to build a roller set themselves and save some money. Our starting point for motorcycle dynos, the 200i is available in either an above-ground or pit model option. To get any horsepower numbers it needs a data acquisition system. Brake dyno using car brakes Balancing the roller takes a considerable amount of time. Test bench electronics Sportdevices SP3 with free Sportdyno software.Universally applicable DAQ system to all brake equipped performance test benches / test dyno's (car, motorcycle, scooter, minibike, kart etc.). WAVdyno.py is the source code for the command line recorder. So for about $250 we not only have a working dyno, but a useful dyno. That is why we say: Dynoteg makes tuning easy! As with all the Go Power Dynos, the D100 can be purchased as an individual unit, or as part of a complete test package: The EDP100 Essential Dynamometer System Package is a portable small engine testing package consisting of:. Hot Metal Harley-Davidson in Pittsburgh, Pennsylvania has had the ability to dyno tune for over 10 years now. DynoSim.wav is a WAV file that simulates the signal from the dyno. Not only is it much easier to use but also more accurate since it samples at 192khz. The torque is calculated based on how fast the roller is accelerating, Force = Mass * Acceleration. DIY dyno parts: Links: F.A.Q. Dynomet Parts, build you own roller set. The heart of any dyno is the power absorber unit (PAU). Commercial units are cheaper and more accessible than ever, but still out of reach for most hobbyists. At this point all weve made is a rolling road test stand. My Homemade DIY Dyno / Dynamometer / rolling road pages, My Homemade DIY Dyno information homepage for information on building a dyno / dynamometer. This is the PAU on the finished dyno. I was talking with my cousin Lucas one day about building a dyno. Granted, its capabilities are limited but we could stick a bike on there and get a print out of horsepower and torque.
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