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24.01.2022 With great power comes great responsibility :-) A small glimpse of a change for the next update - simplified the Maths System and extended it to all Data Channels.......so not only can you create data in the dedicated Maths Channels you can change the original Analog data as well. Modifying the "source" Analog Data is permanent, so if that's not what you want - use the Maths Channels which doesn't change the "source" data.... However to protect the integrity of the core Run data you cannot change the recorded Speed / RPM / Torque or Power, but once again you can use them in calculations for the Maths Channels.

24.01.2022 One turbo too many ? A re-post but I couldn't resist.

22.01.2022 And........ another peek at the next update. All the data channels now display from -9999 to 99999. All Data Dials, Charts, Alarms, Graphs, Bargraphs etc are covered. So, by way of example, you can display Manifold Pressure with Zero being displayed as normal atmospheric pressure, positive numbers as Boost with negative numbers being vacuum using a standard MAP sensor.... As usual you can create your own Sensor scales, Units etc to translate your actual sensor outputs into whatever units and range your want.

22.01.2022 Regardless of whether you have an Inertia or Brake setup - did you know that with DYNertia's Secondary Graph Window its possible to display the same "Run" as the Main Window but use a different Speed / RPM mode ? For example, you can be in Speed Mode on DYNertia's Main Window and RPM on the Secondary Graph Window with the cursor at different points and show all the selected channel information........ all from the same Run. You can even do this with multiple Runs loaded. Mult...iple Monitors make this dead easy but you can still do this with a single monitor. Of course the Secondary Graph Window can be used to display an extra five Runs, allowing you to display 10 at the same time. A pretty cool way of seeing how your tuning changes are actually performing,

21.01.2022 We get the occasional request to "print" graphs etc to an image file rather than to a printer. Apart from the built in BMP export..... did you know that DYNertia ships with the excellent freeware "virtual printer" package PDFill ? When DYNertia installs, it puts a copy of the PDFill installer in your DYNertia / Drivers folder - if you want to use it, you need to install it. Once that's done........ you simply choose the PDFill printer instead of you normal one, then select t...he format you want. JPG PDF PNG JPEG BMP TIFF and .GIF are all available. Instant image or PDF file ! Note : PDFill is not our work, its a freeware, no strings attached package available from the WWW that we think adds useful functions.

19.01.2022 Callan started out with a "cast off" eddy current chassis dyno and did a full mechanical and electrical rebuild - now fitted with a DYNertia3 control system. He's now got a modern dyno to work on his project vehicles.

17.01.2022 Eddy Current retarder owners......... stating the ( I hope ) obvious..... If your retarder draws 20A then you need AT LEAST a 20A AC Supply system. You can imagine the result of being at "full noise" and blowing a mains fuse or tripping a circuit breaker - complete loss of all retarder load. The consequences to the engine should be obvious.... Once again - wishful thinking is no substitute for the correct capacity AC Mains supply.

16.01.2022 Found this on the WWW...... http://demonstrations.wolfram.com/MomentOfInertiaOfACylind/ Its not unusual for people who are looking at designing an Inertia dyno to confuse Mass with Moment of Inertia ( MOI ).... All inertia dynos need to have the MOI entered, so getting an understanding of the concept without doing any mind bending calculations is a cool idea. Brake dyno's also need to know the MOI for accurate runs during Ramp Runs. Its NOT a design tool as it doesn't seem to allow for different materials, but its a good way of getting an idea of how MOI is related to Mass and where its located. Understanding how it all works is always good :-) P.S. make sure your are rotating your roller / flywheel around the longitudinal axis. If you want an actual MOI design tool that does allow you to easily get exact numbers with different materials then use the free spreadsheet on the DTec web page.

16.01.2022 Megasquirt Mexico / Valles Dynamics having too much fun :-) Tavo has fully rebuilt a used Dastek chassis dyno and fitted it with the complete DYNertia eddy current controller system. All the features without the huge price tag of a new system. So if your in Mexico ( or around that area ) and need some help with performance upgrades or dyno tuning, contact Tavo.... https://www.facebook.com/megasquirtmexico/

14.01.2022 Another small addition..... DYNertia already has the option of saving and loading the Current Ratio's to a named file, but on reflection this was a bit "clunky". So we've added a simple "point and click" database that allows you to build up named listings of all the ratio's you use for your bikes / carts / cars etc. This works for all modes - Inertia, Open and Closed Loop Brake..... You can upload from your currently selected ratios and create a new entry or download from the... selected entry to the current ratios as required. There's no limit to the number of entries allowed and they are automatically alphabetically sorted for you.

14.01.2022 To all our Customers and Followers...... have a fantastic Christmas and a safe New Year. We'll be having a few day off between Christmas and New Year, but we'll try and catch up with emails etc.

14.01.2022 An important reminder for Brake Dyno builders.......... DYNertia can control your eddy current retarder in a Chassis or Engine Dyno system, but the maximum power / torque of the system will be determined by YOUR RETARDER. No amount of wishful thinking will change the power / torque limits of the existing retarder. Many older chassis dyno's are only suitable for moderate power / torque as the bikes and cars at the time the dynos were built also weren't all that powerful.... You can fit a larger retarder but that may not be easy or cheap. So check the ORIGINAL manufacturers data carefully........ that unloved dyno could be just what your after but only if you check its ratings first.

13.01.2022 TurboPACS, a long time DYNertia customer, doing their first runs with the latest upgrade to one of their DYNertia / Fuchs - Inertia Bike Dyno's. :-) The second of their DYNertia / Fuchs Dyno upgrades is also under way. They have a couple of VERY professional Dyno setups - thanks for the video guys !.... So if your after some bike or car performance work and are around the Durham ( UK ) area, give them a call.

10.01.2022 The Main Run Window Chart Recorders have always been a bit of a challenge...."normal" Windows fonts just didn't want to scale down properly or align with the grid lines. Solution - create a small font for the charts - now the grid lines and units align, making quick measurements just that bit easier. Making a small font that's readable is a bit of a first for me :-)

07.01.2022 DYNertia has a mechanical overspeed warning system built in so you can stay below the safe RPM limit of your dyno system - regardless of mode or type. You need to set a realistic maximum- with an adequate safety margin. HOWEVER........ the warning system is sensitive, obviously it needs to warn you promptly. However if you are suffering from interference issues its currently possible for DYNertia to get a single wrong roller / mass / retarder RPM reading and trigger the warni...ng. The obvious solution is to fix the interference issues.... but we've also made a small software mod for the next update to require a few consecutive overspeed readings before the warning is triggered. This is a balancing act...... trying to overcome installation or interference problems in software can only go so far before the warning system can't work. Interference - and its usually ignition noise, needs to be managed.

07.01.2022 Chassis Dyno users..... whilst many of you use Speed all the time - DYNertia has many ways of converting this to engine RPM, many without additional hardware. One that's quick and simple if you are familiar with the vehicle is to use the RPM=Speed input with any of the Ratio fields. E.G. if you know that the vehicle does 2250RPM at 100KPH type 2250=100 into any Ratio Field and DYNertia will calculate the required ratio for you.... And by the way......there's also a small "Nudge" scroll besides the Calculate Button for each Ratio..... this allows you to quickly change the ratio up or down a little if you need to. The "Nudge" increment is user set to suit your requirements.

07.01.2022 A small "by request" addition ( lol - calculator humor )...... the inbuilt DYNertia3 Calculator now has buttons to convert to / from Celsius / Fahrenheit. The next free update will be a significant one...... likely 1st quarter 2018.

06.01.2022 Can your Brake Dyno be too big ? Well....... it can create challenges if you want to Ramp Test low power / torque engines or vehicles. The "issue" is Inertia, in general large dyno's have a significant Moment of Inertia ( MOI ) and therein lies the problem. In a Chassis dyno its usually the rollers that have a significant MOI but the retarder itself can't be ignored.... It takes a surprising amount of power / torque to accelerate a rotating mass ( this is the basic principle behind a pure Inertia Dyno ), If your vehicle under test vehicle can't supply the required power / torque to accelerate the rollers at the rate you specify, then there's nothing left for the retarder to control or the Load Cell to measure. As an example - a pure Inertia Dyno with a MOI of 5 ( which is a pretty common MOI for brake chassis dyno's ) will adsorb 80kW over a five second run..... This as you can imaging is a problem........ as the retarder no longer has any control over the system the ramp will be incorrect and of course there will be no measured torque. Inertia correction won't fix this........ its only is correct when the retarder is actually controlling the Ramp rate. The laws of Physics can be a PITA sometimes....... So...... how do you solve this ? 1/ Use slower ramp rates...... inertial power / torque is proportional to the ramp rate, the slower the ramp the less Inertia affects the readings ( see picture... ). 2/ Use Step Mode...... in Step Mode measurements are never made whilst the rollers are actually accelerating, therefore Inertia isn't an issue. 3/ Consider using DYNertia in Inertia Mode...... this time Ineritia is working for you. Its very accurate and repeatable. The picture ( from an expensive, commercial dyno system ) shows the effect of Inertia on a Brake Chassis dyno at different ramp rates........ all done with the SAME vehicle. The only thing changed was the ramp rate ! The more you understand your Dyno's strengths and weaknesses the more useful it will be.

04.01.2022 A little "advance notice" of one of the features of our in development expansion hardware.......... Relay outputs linked to DYNertia's Analog Channel Warning and Channel Alarm systems. Something requested by a few users to control large Warning and Alarm lights / buzzers etc. There are four relays ( SPCO, rated at 240VAC / 10 Amp ) that can be software configured and wired in a whole range of ways. Master Warning and Master Alarm ( any Warning or Alarm will trigger ) are also... provided. With a little imagination other things could be controlled like an engine cooling fan ( extra switching device may be required depending on device rating ). This will be optional......if you don't need the relay system then that's cool - nothing will change, but you will have the option if required. Still a work in progress, likely first half 2018.

03.01.2022 DYNertia has LOTS of ways to monitor Lambda / AFR during a run..... but we've added another Runtime Gauge Window for when your totally obsessed with mixture control :-) Its similar to one of the existing Lambda / AFR monitor Windows.... but this one is available during a run ( Dual Monitors required... ) Lots of adjustment possible to suit your requirements.- including VERY visible warning if you go outside your selected Lambda / AFR range. A wide range of AFR's for common fu...els is already provided and the ability to add your own custom fuels Stoichometric ratio if required. Will be in the next free software update, probably a month away, Lots of small tweaks.

03.01.2022 For the two stroke INERTIA Engine Dyno guys..... consider adding a "one way" ( AKA Spragg Clutch / Overrun Clutch ) to your setup. Once you've done your run you don't want the flywheel driving the engine during rundown - engine lubrication could be an issue as the throttle will be closed. Of course you can also apply the brake to slow the flywheel down, but with a "one way" clutch its all automatic - nothing extra to do..