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Understanding Camshaft Fundamentals - JEGS High Performance
https://www.jegs.com/tech-articles/understanding-camshaft-fundamentals/
WebSep 7, 2022 · Camshaft Duration is the measurement of the time one valve begins to open until it finishes closing. Duration is measured in degrees of crankshaft rotation, not camshaft rotation. You'll see duration specifications at .050 inches.
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How to Read a Cam Card to Understand Camshaft Specs
https://www.onallcylinders.com/2021/02/24/how-to-read-a-cam-card-to-understand-camshaft-specs/
WebFeb 24, 2021 · The next spec we’ll deal with is duration. This is defined as the number of degrees of crankshaft rotation that each valve that spends off the seat. All camshaft specs are expressed in degrees of crankshaft rotation. Crankshaft degrees are used because that’s the easiest way to measure these points on the actual engine.
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Choosing The Right Cam - MotorTrend
https://www.motortrend.com/how-to/choosing-the-right-camshaft/
WebJul 7, 2004 · DURATION: Duration is how long the cam holds the valves open. It's expressed in degrees of crankshaft rotation (remember, the cam rotates at half the speed of the crank). A...
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Summit Cam Timing Calculator - Summit Racing
https://www.summitracing.com/newsandevents/calcsandtools/summit-cam-timing-calculator
WebSummit Cam Timing Calculator. This calculator will help you rapidly determine the perfect camshaft for your application. In the upper area, calculate individual valve events and lobe centerlines by entering Intake and Exhaust Duration, Lobe Separation and Advance. OR.
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Camshaft Duration Explained: A Comprehensive Guide for Car …
https://techiescience.com/camshaft-duration-explained/
WebDec 18, 2023 · Camshaft duration is the measurement of how long the intake and exhaust valve s stay open during the engine’s operation. It is typically measured in degrees of crankshaft rotation. The duration is determined by the shape and design of the camshaft lobes, which control the valve timing.
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What to consider when selecting a high-performance camshaft
https://www.hemmings.com/stories/tech-understanding-camshaft-specifications/
WebNov 28, 2022 · Along with lift, a common specification of any camshaft is duration. This is the time in degrees that the intake and exhaust valves are open. Extending duration beyond stock can increase power, but this should be done carefully and with consideration to expected rpm range and drivability.
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Choosing The Right Camshaft: A Comp Cam Selection Guide | JEGS
https://www.jegs.com/tech-articles/how-to-choose-a-camshaft/
WebAug 29, 2022 · Piston to valve clearance can also become an issue. Verify that you will have enough clearance before you buy a new cam. Camshaft Duration is the measurement of the time one valve begins to open until it finishes closing. Duration is measured in degrees of crankshaft rotation, not camshaft rotation.
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What is Camshaft Duration? · Help Center - Summit Racing
https://help.summitracing.com/knowledgebase/article/SR-04700/en-us
WebIntake Duration = 7° + 39° + 180° = 226° Exhaust Duration = 51° + 3° + 180° = 234° How does it affect performance? At high rpm, longer intake duration fills the cylinder. It also allows more exhaust to escape. This creates more power. (It is why a camshaft's RPM Range is based on its duration.)
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Understanding How Camshafts Work - MotorTrend
https://www.motortrend.com/how-to/understanding-camshafts-work/
WebAug 8, 2018 · Duration: Is how long the valve is off its seat in degrees of crankshaft rotation. There is advertised duration and duration at 0.050-inch lift. There is also duration at 0.006-inch lift....
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Wallace Racing - Optimum Camshaft Duration and LSA Calculator
http://www.wallaceracing.com/cam-spec-calc.php
Web4 days ago · Optimum Camshaft Duration / LSA Calculator. Wallace Racing BACK to Calculators. This Calculator will figure the duration and LSA of your camshaft using your inputs. This calculator is mainly for wide open throttle and based on HP peak RPM range. The duration is figured at .050".
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