The chassis dyno is a great way to find out how much power your car is making. Max Pulse Width = 2 x 60 ÷ engine rpm 6000 = 120 = 20 milliseconds. 24. You can bet your house on one thing: Ford, GM and Chrysler don’t calibrate their vehicles with these low cost dyno sensor systems. No way. We know all the games, tricks and variables about making horsepower “numbers.”. When we think of tuning, most people immediately think of a dyno and when we have the option to tune on a dyno, this is usually going to give you the best possible results. Your goal should never be to “compare dynos” but instead, to compare on the same dyno. I go to an interstate on ramp, start my log and run through 3rd. Kenne Bell cannot and will not “re-tune” to any bogus AFR number and burn up a set of expensive catalytic converters or ruin an engine. After 20 ms, the engine is coming around for another cycle so that is all the time the injector has to supply fuel. Dyno tuning helps to tune your vehicle so that you have a more cost-effective and smoother ride. 15. This is not the solution to the AFR problems. 5. Not really? Check for abnormal back pressure if suspect. Dyno Proven. With only a gear change to 3.55’s, it lost 10HP. Getting the best uprated mods for your planned usage of the car is a time and money saver. if you want the best milage, power etc. A typical dyno tune should be undertaken at the end of any upgrade, to maximize the potential of the parts safely. Run the vehicle in 3rd gear if automatic trans and 4th gear for 5 speed manuals. A dependable .5 ratio variation isn’t that serious a problem because it can be deducted IT DOES NO GOOD TO LOG 4 MILLION OTHER PARAMETERS THAT MEAN NOTHING – ALL THIS WILL DO IS SLOW THE SAMPLE RATE DOWN AND SKEW THE LOGGING, JUST GET THE ONES ABOVE IF YOU ARE GOING TO WANT US TO LOOK AT IT. MEASUREMENTS WILL BE DIFFERENT WHEN CORRECTING FOR OTHER “STANDARDS”. A good tune requires a modern scanner like the SCT Raptor and an ACCURATE, REPEATABLE & CONSISTENT AIR FUEL RATIO DEVICE AND SENSOR. DynoJet 424LC2 with Linx - the most advanced dyno that DynoJet produces. It’s extremely complex but has no problem “killing” HP when you least expect it. Thoroughly understand it before dyno testing. Race fuel will get you a bigger horsepower number but the tune will be optimised for that fuel. Yahoo ist Teil von Verizon Media. Also trans, engine and rear end fluid temp can affect HP. When it comes to keeping your car safe, reliable, and road legal, you need to be confident that you are dealing with a team of car servicing experts. Stage 3 competition upgrades just don't work well on the road difficult in stop start traffic. Our indepth guide covers car engine tuning for all popular types of engine. The question that really bothers us is when the customer compares 2 dynos and then asks Kenne Bell which on is right, the 14.1 or 13.1. If you want less water in 3 seconds, then turn down the hose bib (reduce pressure) or screw in the trigger nozzle adjusting knob (reduce flow). If using one of these Power Speed Calculators, look ONLY at the 1/4 mile trap speed to compare HP. This will confirm both whether there have been any losses or gains in power and the safety of the … And don’t count on one of those “filter shields” to solve the problem. A respected Primedia magazine conducted extensive tests with the same vehicle on 7 different types of chassis dynos. 27. ENGINE KNOCK (DETONATION, PRE-IGNITION) – As mentioned earlier in FUEL, OCTANE, IGNITION TIMING & BOOST, knock can affect dyno readings because of the knock sensors or heat from detonation. This will ensure a successful dyno day. can make any HP number you want and vary the dyno readings 50, 75, 100, 125HP. In addition to that, before having it installed in a car, a driver must buy it from a trusted local dealer. Posted on Jun 10, 2020. That’s the way we do it. If you want the best engine tune up for your bike, you should consider dyno-tuning. You need to see what the engine is doing in order to adjust it correctly, otherwise it is just a guess. Try a 3 gear run on the Dynojet and you’ll see for yourself. However, if your goal is to make a particular product that doesn’t make power look good, just keep adding other products until something makes HP and the claim “one needs the other to perform best.”. An ECU device is used to modify the parameters of your vehicle’s engine control unit according to exact specifications. It comes with a chip burner, chips ($25/each), emulation laptop capability, instructions, and tech support. These sessions ensure your car is running at the top of its game. No way. In your PC, you will be in a position to see the term notebook chip tuning. This Raptor will print out the timing, commanded AF ratio, ACT, ECT, etc., etc. This means that the best answer to this question is to get both an e-tune and a dyno-tune. We wouldn’t rush to blaming the dyno itself for HP variations. If the dyno runs are not consistent for 3 runs, then the test is flawed because you’ll never know which of the 3 was the right one. This situation must be resolved. 28. We hope it has helped. If your arrive with MSD parts on your car, I will tune it, but if the part fails while tuning or is bad from the start, there will be an extra charge or your car may not be able to be completely tuned and you will still be responsible for all of the tuning fees. And this by no means implies that Kenne Bell is right and dyno AFR’s are wrong 100% of the time. drum inertia dyno. The part tested is always the “variable.” And don’t get duped into believing “Well, it didn’t make any power, but this part I sold you likes more timing – or likes to be leaner.” That’s B.S. 23. This paper was written to help our customers better understand dynos, testing and the variables. When you do this, you will be immediately moved into the car for carrying out the dyno. In car mechanic simulator In the case of Car mechanic simulator 2015 , this tuning is also called as chip tuning . INLET TURBULENCE – Turbulent air flow from the engine fan will affect the air flow into an underhood air filter and more importantly, the mass air meter. Then you can at least be comparing apples to apples. Always do comparison dyno testing with the same gears. However, when the vehicle is re-tested with an ECM or Horiba or a Dynojet with a fresh sensor installed, it checks O.K. It either did make power or it didn’t. Most important in any test is to verify the product comparison is performed under identical conditions on the same vehicle with only 1 change – the product itself. And be careful you don’t ice down the ACT sensor, or you may also alter the timing and AF ratio. There is a tangible and easy to calculate relationship. Dyno Day rates are $75 per 2WD/AWD vehicle. Main Reasons for Dyno Tuning. ICED INLET SYSTEM – You’re only fooling yourself and creating a new variable. Because air temp is so critical to accurate dyno calibration, it should be obvious that the temperature AT THE AIR FILTER be used and NOT the temp reading by the dyno computer, on a wall etc. An e-tune will average the values out in real world conditions, taking the numbers from the datalogs you provide for the conditions AT the track. It doesn't matter what make and model car you have or are looking at tuning, this course will be applicable. We’ve measured a 40° difference from top to bottom on an ’03 Cobra with an open hood and a dyno fan. 18. While a dyno isn’t going to place any more stress on your engine than driving it at full throttle on the road, if your engine is using oil, smoking heavily out the exhaust, pushing water out or generally in poor health, your dyno session probably isn’t going to end well. Typically run automatic trans vehicles in 3rd gear and 4 speed cars in 4th gear. throughout the dyno run. The turbulent air flow can seriously skew the meter readings and alter the meter readings / air fuel ratio / HP of your engine. Even rotating the meter can affect dyno accuracy. Should we re-tune for this “air leak?” Absolutely not. 4. To further alter the amount of water in the bucket, do a little on-off action on that trigger nozzle. Job … Make all runs at same temperature with engine, trans and rear end warmed up. How can one possibly eliminate dyno testing variables if the AF ratio sensor or meter is not accurate? So, if at WOT a Œ given injector size has the  correct pressure and is Ž “open” for the maximum time, then there CAN BE NO VARIABLES in fuel delivery and Kenne Bell can’t have “screwed up cals.” Right? Even if you aren’t interested in racing, it can be an important element in your maintenance program. DYNO TYPE – The Dynojet inertia rear wheel dyno has been referred to as the “Industry Lie Detector” because of it’s accuracy and reliability. Some change fuel mixture when the key is turned on and off to protect the cat against heat soaking and potential damage. (approx. See if the dyno operator will give you the actual dyno run files on a disc. More on that later. In the ’50’s, I would tune my new cars at the Pomona Drag Strip by being first in line when the gates first opened. When we Dyno tune your vehicle we are performing a car tune-up of the highest quality, using a measured and systematic approach, which will provide you with more power, and the smoothest, most economical performance possible from your vehicle. Select a dyno that also uses SCT (Superchips Tuning) (407) 774-2447 software and the SCT Raptor Diagnostic Data Scanner so you can look at the ignition timing, ACT, ECT, etc. One of the best Ford tuners in the U.S. tuned 6 cars all with the same inaccurate sensor. DYNO OPERATOR VARIABLES – We’ve seen and heard it all. Install any alternate injectors, map sensor and chip that you will be running to get to the dyno. We often “lock” or “fix” the voltage to a sensor to totally negate any possibility of AF or timing variations. TIRE PRESSURE – We once spent hours diagnosing why our 720HP Cobra lost 40HP overnight. Once I got all 4 corners jetted ideally – I would know when I had it right because the 1/4 mile speed wouldn’t change or it would drop – I’d turn the distributor 1° at a time with a special “adjustable screw cable” I had designed for testing. The tuner must 1. advance the timing and/or 2. lean out the AF ratio. I’ll just say this. Your best option is to take your bike to a garage or shop that has the dynamometer and other equipment needed to do this specialty tuning offers … – if, of course, one believes our data. So, the calibration is richened 2 points to 11.1, which is ACTUALLY 9.1. These “hot air” underhood filters are a big variable in dyno testing. Circle track engines and those that are destined for street only … It’s dead accurate. Dyno tuning offers high-quality tune-ups for your engine to boost its overall performance. A necessity for racers and street rodders to get the most out of their vehicles. Did they both lose power, both make power or did one make power and the other lose power? Investing in a wide band O2 sensor like the MOTEC they sell is also a good idea. They are typically operated by the vehicles computer so the engagement and/or engagement rpm, speed and gear may be modified. Power Train Electronics (805) 466-5252 is the most popular andcompetitively priced. We have reached the point where the current inaccuracies of dyno and in car AFR readings with “wide band O2 sensors has created so many problems for us that we are hesitant to even recommend our customers dyno test their cars. By using the accurate diagnostics we obtain, our technicians can tune your performance vehicle or sports car accordingly. Advertised Comparisons”). ENGINE vs. CHASSIS DYNOS – Kenne Bell had done extensive testing comparing the two dyno types. Smoothing can vary power readings by approximately 10HP. DRAIN OUT ANY FUEL WITH AN OCTANE OF LESS THAN 100. HOOD CLOSED WITH OPEN FILTER – This one should be self explanatory. For example, a 4 speed manual trans with 1:1 will make more power than 3rd gear. When we have a customer who doesn’t accept our explanation, we recommend that he check his car on another dyno just to prove the readings are erroneous. is directly proportional to rpm and vehicle speed. THANK YOU. We’ve compared chassis dynos and engine dynos to chassis dynos. There are no secrets. Recommended reading for anyone planning to dyno test AGAIN, TEMPERATURE AFFECTS THE HORSEPOWER AND TORQUE OUTPUT – AS TEMPERATURE INCREASES, HP AND TQ DECREASES AUTOMATICALLY (IN THE KB CHIP) TO PROTECT THE ENGINE AND CONTROL KNOCK. Dyno tuning, basically, puts your car on a giant treadmill. ALTHOUGH TEMPERATURE WILL ALSO AFFECT THE SHOOTOUT HP AND TQ OUTPUT, THERE WILL BE LESS EFFECTIVE REDUCTION IN POWER – THIS POSITION WILL ALLOW FULL SPARK TIMING UNTIL REACHING HIGHER ENGINE OPERATING TEMPERATURES. At the dyno you can tune your car and stop guessing if the change you made actually did anything. A dyno tune that is attached to an engine directly is called an engine dyno. This one is dated 08/12/04. If the leak is in the intake manifold, it will pull in unmetered air at idle and in part throttle conditions where there is a high amount of vacuum in the intake manifold. Can help you adjust your car to increase torque and horsepower without losing fuel efficiency and drivability. Lose any underhood exposed “hot air” filter – where no one else can find it. Then there’s the rear tailpipe sniffers. How can one know if the sensor is accurate if it can’t be calibrated or checked prior to a dyno run – or if it can’t be compared to an accurate sensor reading? As compared to a manual trans, an automatic trans car will typically run .3 sec/3 mph slower with an unlocked converter and only .1 sec/1 mph slower with a locked converter. The tire pressure in the slicks had dropped from 35-15 psi. If you lack the equipment to stabilize timing and/or eliminate knock – or you’re sneaking up on a tune, it’s better and safer to step up to racing fuel and eliminate the variables. IF YOU WISH TO OBTAIN THE BEST HP AND TQ VALUES, RUN THE VEHICLE WHEN AS COLD AS POSSIBLE (however, make sure Does anyone really believe that there is no delay in AFR signal with the sensor in the tailpipe end vs. the header pipe. It goes on and on and on. If there’s 2 sensors (before and after the cat), we suggest removing the stock O2 and installing the new sensor – or installing a new bung if it’s an earlier model vehicle. IAT sensor temp may be observed in a factory scan tool, but we never recommend because they are so far behind the actual event. Allow to stabilize. Therefore, if for any reason, an engine knocks and the knock sensor automatically retards timing, the HP will be less. A tune is really all about the data. THE TRACTION CONTROL SWITCH (if applicable) SHOULD NOT HAVE TO BE MANUALLY SHUT OFF PRIOR TO ANY DYNO RUN, AS THE KB CHIP KEEPS THIS OFF WHILE IN SHOOTOUT. Dyno tuning is a systematic approach to engine tuning. 3. OEM calibrations and their operation. 9. A typical dyno tune should be undertaken at the end of any upgrade, to maximize the potential of the parts safely. If you need performance work done on your vehicle, you may consider getting a dyno tune to have optimum performance of your vehicle. Getting your car prepared for a dyno tune can save you hundreds, if not thousands, of dollars in potential damage caused by increasing your power levels. In 1960, I dyno tested my 5500lb ’59 Buick Invicta on a friction dyno. We’ve observed 20HP variance between 2nd and 3rd gear or 3rd and 4th gear. They varied a whopping 33% in HP from the lowest to the highest. Point the trigger nozzle on your hose into a bucket and squeeze the nozzle for 3 seconds. You’ll see the “jerks” on the dyno curve of a Dynojet if unsmoothed. 6. If we can’t eliminate the variables, the test is worthless. This device, called a dynamometer, simulates various road conditions while allowing technicians to measure every dimension of your vehicle’s performance: power, torque, etc. SHUT OFF THE TRACTION CONTROL SWITCH PRIOR TO ANY DYNO RUN. 25. Only today, the vehicles are far more complicated and difficult to tune because of an ever increasing number of variables. Treat yourself good, treat your car better. That is exactly what a dyno jet power commander tuning module or ECU reflash and dyno tune will do. At 11.1 or 11.5. Dyno to dyno, Dynojet tests should be quite accurate, within 10HP IF THE DYNO IS CALIBRATED CORRECTLY, THE IDENTICAL “SAE”, “STD” OR “UNCORRECTED” CALIBRATION IS USED AND THE ACT READING IS MEASURED AT THE FILTER. Smoother throttle response. The traveling SCT company tuners now carry their own new “fresh” sensor. Always bring your car to the dyno with the exact fuel mixture you plan to run. Get a scanner and data logger and record it so there is an accurate comparison of ignition timing retard. And yes, a Cobra IRS rear is 3% less efficient than the non IRS (3% x 400HP = 12HP). And remember that the vehicles IAT sensor operates INDEPENDENTLY of the dyno room temp. 1. Our tests on the same vehicle has shown these dynos to be 25-30HP off. Mustang 2V, 3V, & Cobra Mammoth Dual 75MM-1880 CFM, Bigun Inlet Manifold & Throttle Body 3800 CFM, External Spring Supercharger Bypass Valve, Torque Management / Electronic Throttle Control, Underhood “Hot Air” Filter Temp Measurement. We have documented cases where 2 dynos across the street from each other varied a full point – yet the HP was identical. 13. 20. A dyno/rolling road is the process of putting your car on a machine that will provide you with data about the performance, power and torque of your vehicle. Typically these uprated parts are usually fitted by our members, decide how far you wish to go in your tuning project before you get going. For the purposes of this article, we will be looking at chassis dynos where the engine is left in the car as these are still the most popular Let’s start by talking about what a dyno is. Jan 26, 2017 himanshu No Comments Each car that leaves the production line of a factory is actually unique. [PART 2 of 2] Subaru tuner Junior Barrios from JRTuned gives insights on dyno tuning and the importance of the tuner-builder relationship. Take a deep breath and read on. Conventional Bolt Ons” “Real vs. There’s 5HP here. using the ECM or Horiba, please, no “tailpipe sniffer” air/fuel readings. 19. Also, as we always recommend, NEVER, EVER run in SHOOTOUT mode unless running straight 100 octane fuel or better or engine damage will occur. The result is a fast car that will remain in top condition for a long time. AFR cannot vary even 1 point (12 to 11) and not change HP. We are at this extremely high level because we maintain a very high level of service here and get great results. Be sure to warm up the rear end, trans coolant and engine lubricants before making any meaningful dyno run. They, of course, had to be re-tuned. Utilize the same dyno for before and after tests. It is used by all the OEM’s to compensate for varying weather conditions – and it works. One of Kenne Bell’s best Installer/Tuners had been re-tuning cars a full AF ratio point off for a year while assuming it was the Kenne Bell tune that was off. If the engine knocks, reduce the boost and eliminate the timing variables. They don’t care about factoring in aerodynamics or road load/vehicle weight. Investing in a wide band O2 sensor like the MOTEC they sell is also a good idea. We’ve run it, almost on a daily basis, ever since with full confidence in it’s output data. They’re not “all different” as many would like you to believe. Dyno Tuning vs. Street Tuning. Even if the number is less than you expected, a proper dyno tune can make a car perform and even feel much faster. I could change jets in a mere 4 minutes and be back in line for another run. If you … We hope you find it informative and helpful. IT FEEDS HOT AIR TO YOUR ENGINE INSTEAD OF THE COLD AIR. At 9.1, the overly rich mixture can damage expensive cats and sensors, foul plugs and wash cylinder walls. In addition to the unsmoothed dyno curves, always request the hard data from each run (AF ratio, calibration correction factor, temp, relative humidity, barometric pressure, vapor pressure and the hard dyno numbers). 34. On a stock motor, overall results from a CAI … Why Dyno Tune Your Vehicle . CATALYTIC CONVERTERS – First of all, we’ve never seen a “hi-flow cat” that makes more power so don’t bother removing them unless it’s a race car. We won’t get into the many specific examples that we’ve documented, but there has been far too many reports where “the car is so lean we’re afraid to run it.” Our customer panics. Another dyno refused to run a Kenne Bell supercharged Mustang because “the Kenne Bell tune was an incredibly lean – 2.5 points.” Yet another dyno test on the identical car was 2.5 points richer or 11.1. Any thoughts on that as I am not computer literate. In those days, I didn’t have an accurate Dynojet dyno or air fuel ratio sensors, but my approach worked – “one change at a time with no other variables.” I was able to determine the ideal timing and carb jet size because the testing conditions did not vary. Fix your oil leaks Fortunately, the websites are of some help in identifying these people. 31. The IAT sensor may also adjust air fuel ratio. Try this example. and other data from the OEM computer in real time. They are both wrong – it’s 11.1. Again, 1° of ignition timing is 4HP. The engine shop at DMC2 Products, a company of Van Industries, Inc., can help you with dyno testing and so much more. GEAR SELECTION – The trans gear ratio that is 1:1 will make the most power as it is the most efficient. Modifying cars in the UK generally do not add value to your car and you should be aware that in most cases will devalue the resale value of your car. but the 1/4 mile speed IS a dyno run and can be compared directly to the dyno HP. Inevitably, when compared, HP is typically the same, but the AFR is 1,2,3 or 4 points leaner. Always compare HP in the same gear with the converter locked or unlocked. We do not make use of DynoJet air/fuel data unless the data is taken from an ECM or Horiba instrument. Utilize the same dyno … The readings do not coincide with the Kenne Bell kit or chip calibration data the majority of the time. 22. Before we run your car on the dyno we will carry out a pre-run diagnostics to make sure your car is in good working order before we start. Dyno Tuning . Dyno tuning allows us to give your vehicle a tune-up of unparalleled quality, providing you with the smoothest, most economical performance possible from your vehicle. Let’s take a closer look at how and why dyno horsepower claims may vary – knowingly or unknowingly. Run the engine “hot” the first time, let the dyno fan cool it down and then run it “cold.” The cold run will typically make more power.