Reading Dyno Sheets
Remember you can make a dyno sheet read just about anything by adjusting many variables. At Fortune Auto North America we use a shock dyno in our daily operations for all of these tests.
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On our example dyno chart note how the green line cams makes a strong improvement from 5000 rpm and up compared to the red line header.
Reading dyno sheets. Most shock dyno sheets graph shaft velocity along an axis of force exerted in both. We also use a shock dyno for shock matching durability tests and confirming damper adjustments. The shock dyno is a device for measuring the performance of shocks.
Reading Shock Dyno Plots. Results can and will vary. Every operator will generate data in a different way so beware dyno results or numbers without baselines and always ask if conditions were consistent between the before and after.
Vapor Pressure Humidity or vapor pressure is an important factor in calculating the corrected horsepower and torque. There are a wide range of different companies the make Dynamometers and each of their software prints the graphs in different layouts but the most popular is going to be the DYNOJET. Its also a way to tell if a modification was worth while or not or if it was actually an improvement and where.
The numbers from an engine dyno will be higher than a chassis dyno due to parasitic loss or drivetrain loss of power which is typically somewhere around 15 depending on the vehicle and other factors. All DC CYCLE RACING Dyno sheets are printed in SAE correction factor for accuracy and repeatabili ty. A dyno graph is important because.
Test Type In an acceleration test the engine is accelerated or decelerated at a preselected rate 300 rpmsecond is. Meaning that if your 2016 Mustang GT is rated at 435 crank horsepower. Shock Absorber - Shock Dyno - Reading Between The Lines.
How to Read a Dyno Sheet 1. There are some tricks to know in order to make some meaningful use of the data on a dyno sheet. Reading a dyno sheet is fairly easy if you understand the terms and conditions of the test.
150 Franklin Street Reading PA 19602 6103756180 A shock dyno graph is your Assurance of Quality showing you exactly how your shock or strut performs. Dyno graphs hold quite a bit of useful information if you know how to read them beyond peak numbers. Below you will find an assortment of sample dyno charts for various Harley combinations this is a work in progress.
Dyno numbers dont turn quarter miles or lap times. I see more and more posted pulls made in 5th gear instead of 4th Is this an attempt just to show higher numbers and bragging rights or is there a legitimate reason for this. A dyno is not a Ruler where 30cm is always 30cm a dyno can read high or low and it comes down to a number of factors things like the actual dyno calibration the way the car is strapped or tied down on the dyno the atmospheric conditions or input the type or brand of dyno.
We will be adding more more Harley charts as well as Metric Euro charts as we go from the 2000 bikes we have tuned over the past 2 decades. How To Stay Warm On Your. Customer names dates conditions and correction factors are on every chart.
The lines that a dyno produces on the graph indicate the consistency and pattern that an engine makes horsepower and torque allowing a tuner to see where fuel and timing may be needed or need to be reduced. CW TIPS TRICKS. So that is what well focus on.
In this video I explain the 2 main types of chassis dyno. Most dyno operators will print a form with columns of numbers for the customer or tuner to reference. Thanks for any info.
Shock dyno results primarily aid in determining hysteresis cavitation. Still trying learn how to gain useable information reading Dyno sheets. A graphic reference is always of assistance and can supply you with some very important information that otherwise would not be so readily apparent.
Note the data in these charts is relative to each specific bike. A dyno sheet without a baseline is meaningless. These charts are not computer generated but rather copies of the original.
How to read a dyno graph sheet or chart. The Dyno sheets below are provided for reference only. Reading a dyno sheet The data display on the dynos computer screen can be printed out for your reference.
The usual model consists of an electric motor connected to a Scotch yoke mechanism which converts the rotation of the motor into a pure reciprocal sine wave. The first thing a person looking at a dyno graph needs to understand is that. Tip 72 from the pages of The Total Motorcycling Manual.
Lets look at an example of a dyno sheet. This helps us offer the client a consistent and thoroughly tested product. How to Read a Dyno Chart.
An engine dyno is when a machine is used to measure power output right off the crankshaft rather than to the tires. Understanding what each column represents is critical in getting the most from your dyno time. Take it for what its worth to see improvements over previous runs on the same dyno not to bench race.
All Dynomometers read differently. YES I did a search to no avail. In this first graph u will see 2 HP.
What does the CFSAE vs STD mean. The shock is connected to the yoke and a load cell and the motor has a position encoder in it so it knows the position of the shock relative to time. Drag racing shock and suspension technology has changed drastically over the last five years so we have invited world renowned suspension and tuning expert.
Reading dyno sheetswhere do I start banghead. Every dyno will read differently.
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