Camshaft Measurement

Camshaft Measurement http://web.me.com/willm/Site/Photo_Albums/Pages/Camshaft_Measurement.html Testing camshafts on a Cam Pro Plus at Shine Racing Service. Includes some results. Blog post here. The Cam Pro Plus system includes several parts. This is the control/interface box. The interface box sits between the sensors and a computer/laptop. http://web.me.com/willm/Site/Photo_Albums/Pages/Camshaft_Measurement.html#0 24d84bbd-51bf-440f-9726-dc079a0d4102 http://web.me.com/willm/Site/Photo_Albums/Pages/Camshaft_Measurement_files/Media/IMG_0541.jpg?derivative=thumb http://web.me.com/willm/Site/Photo_Albums/Pages/Camshaft_Measurement_files/Media/IMG_0541.jpg?derivative=micro

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<div style="padding: 0px; " class="image_cluster_layout_style_default_External_191_30"><div class="image_cluster_layout_style_default"><p style="padding-bottom: 0pt; padding-top: 0pt; " class="Caption">The Cam Pro Plus system includes several parts.  This is the control/interface box.  The interface box sits between the sensors and a computer/laptop. </p></div></div> The camshaft sits on a stand. At one end of the stand (the mini-drill press looking thing behind the laptop screen) is the sensor that rides along the camshaft’s lobe. At the other end is a rotary encoder that is attached to the end of the camshaft. The laptop runs the software which does all of the calculations. http://web.me.com/willm/Site/Photo_Albums/Pages/Camshaft_Measurement.html#1 d5141bde-db69-45e6-9a28-8411ceb2fb9a http://web.me.com/willm/Site/Photo_Albums/Pages/Camshaft_Measurement_files/Media/IMG_0537.jpg?derivative=thumb http://web.me.com/willm/Site/Photo_Albums/Pages/Camshaft_Measurement_files/Media/IMG_0537.jpg?derivative=micro

http://web.me.com/willm/Site/Photo_Albums/Pages/Camshaft_Measurement_files/Media/IMG_0537.jpg?derivative=mip

<div style="padding: 0px; " class="image_cluster_layout_style_default_External_191_30"><div class="image_cluster_layout_style_default"><p style="padding-bottom: 0pt; padding-top: 0pt; " class="Caption">The camshaft sits on a stand.  At one end of the stand (the mini-drill press looking thing behind the laptop screen) is the sensor that rides along the camshaft’s lobe.  At the other end is a rotary encoder that is attached to the end of the camshaft.  The laptop runs the software which does all of the calculations.</p></div></div> Here’s the end that measures the cam profile. The fat cylinder at the bottom of the sensor rides along a cam lobe, which moves the sensor arm up and down. This linear motion is converted to a measurement and sent to the laptop. http://web.me.com/willm/Site/Photo_Albums/Pages/Camshaft_Measurement.html#2 588f503a-4ea0-4119-9a28-5c88d9b0e91b http://web.me.com/willm/Site/Photo_Albums/Pages/Camshaft_Measurement_files/Media/IMG_0546.jpg?derivative=thumb http://web.me.com/willm/Site/Photo_Albums/Pages/Camshaft_Measurement_files/Media/IMG_0546.jpg?derivative=micro

http://web.me.com/willm/Site/Photo_Albums/Pages/Camshaft_Measurement_files/Media/IMG_0546.jpg?derivative=mip

<div style="padding: 0px; " class="image_cluster_layout_style_default_External_191_30"><div class="image_cluster_layout_style_default"><p style="padding-bottom: 0pt; padding-top: 0pt; " class="Caption">Here’s the end that measures the cam profile.  The fat cylinder at the bottom of the sensor rides along a cam lobe, which moves the sensor arm up and down.  This linear motion is converted to a measurement and sent to the laptop.</p></div></div> This is the rotary encoder. It is magnetically stuck to the end of the camshaft and spins independently of the camshaft. Actually, it doesn’t spin at all. The encoder stays stationary while the cam is turned by hand, and relays back to the laptop how much the cam has turned. All the while, the sensor riding on the cam lobe is reading the lift. The computer receives simultaneous readings from both sensors and assigns a relationship to both. With both pieces of information, the software determines that there is X amount of lift at Y degrees of rotation. http://web.me.com/willm/Site/Photo_Albums/Pages/Camshaft_Measurement.html#3 8198a556-39e7-45a9-9a9d-97e6370cc388 http://web.me.com/willm/Site/Photo_Albums/Pages/Camshaft_Measurement_files/Media/IMG_0543.jpg?derivative=thumb http://web.me.com/willm/Site/Photo_Albums/Pages/Camshaft_Measurement_files/Media/IMG_0543.jpg?derivative=micro

http://web.me.com/willm/Site/Photo_Albums/Pages/Camshaft_Measurement_files/Media/IMG_0543.jpg?derivative=mip

<div style="padding: 0px; " class="image_cluster_layout_style_default_External_191_30"><div class="image_cluster_layout_style_default"><p style="padding-bottom: 0pt; padding-top: 0pt; " class="Caption">This is the rotary encoder.  It is magnetically stuck to the end of the camshaft and spins independently of the camshaft.  Actually, it doesn’t spin at all.  The encoder stays stationary while the cam is turned by hand, and relays back to the laptop how much the cam has turned.  All the while, the sensor riding on the cam lobe is reading the lift.  The computer receives simultaneous readings from both sensors and assigns a relationship to both.  With both pieces of information, the software determines that there is X amount of lift at Y degrees of rotation.</p></div></div> The laptop screen shows the readings of both sensors. Lift is provided by the sensor riding on the camshaft and angle by the rotary encoder on the opposite end of the camshaft. To record a cam’s information, a cam is slowly turned by hand. When the camshaft has been turned 5° beyond one full rotation (total of 365°), it stops automatically. A new window opens up in the software showing a graph. http://web.me.com/willm/Site/Photo_Albums/Pages/Camshaft_Measurement.html#4 7e206dea-98c2-4d67-8cb2-58415da4111c http://web.me.com/willm/Site/Photo_Albums/Pages/Camshaft_Measurement_files/Media/IMG_0539.jpg?derivative=thumb http://web.me.com/willm/Site/Photo_Albums/Pages/Camshaft_Measurement_files/Media/IMG_0539.jpg?derivative=micro

http://web.me.com/willm/Site/Photo_Albums/Pages/Camshaft_Measurement_files/Media/IMG_0539.jpg?derivative=mip

<div style="padding: 0px; " class="image_cluster_layout_style_default_External_191_30"><div class="image_cluster_layout_style_default"><p style="padding-bottom: 0pt; padding-top: 0pt; " class="Caption">The laptop screen shows the readings of both sensors.   Lift is provided by the sensor riding on the camshaft and angle by the rotary encoder on the opposite end of the camshaft.  To record a cam’s information, a cam is slowly turned by hand.  When the camshaft has been turned 5° beyond one full rotation (total of 365°), it stops automatically.  A new window opens up in the software showing a graph.</p></div></div> The graph shows the cam’s lift profile (the shorter rounded hump) and the valve’s acceleration, the spike-like “N” graph. Actually, there are many different graphing options, these are just two of them (and perhaps the most popularly used). http://web.me.com/willm/Site/Photo_Albums/Pages/Camshaft_Measurement.html#5 769ce088-77d1-4607-bdf5-6768b03adac1 http://web.me.com/willm/Site/Photo_Albums/Pages/Camshaft_Measurement_files/Media/IMG_0544.jpg?derivative=thumb http://web.me.com/willm/Site/Photo_Albums/Pages/Camshaft_Measurement_files/Media/IMG_0544.jpg?derivative=micro

http://web.me.com/willm/Site/Photo_Albums/Pages/Camshaft_Measurement_files/Media/IMG_0544.jpg?derivative=mip

<div style="padding: 0px; " class="image_cluster_layout_style_default_External_191_30"><div class="image_cluster_layout_style_default"><p style="padding-bottom: 0pt; padding-top: 0pt; " class="Caption">The graph shows the cam’s lift profile (the shorter rounded hump) and the valve’s acceleration, the spike-like “N” graph.  Actually, there are many different graphing options, these are just two of them (and perhaps the most popularly used).</p></div></div> Maruha Racing Intake Camshaft The short “ramps” at the leading and trailing ends of the acceleration and lift graphs are there to take up the lash. Nicely shaped! http://web.me.com/willm/Site/Photo_Albums/Pages/Camshaft_Measurement.html#6 d31e7015-c32d-4907-b944-c6fdac8a2209 http://web.me.com/willm/Site/Photo_Albums/Pages/Camshaft_Measurement_files/Media/Maruha_272_Intake_Graph_2.jpg?derivative=thumb http://web.me.com/willm/Site/Photo_Albums/Pages/Camshaft_Measurement_files/Media/Maruha_272_Intake_Graph_2.jpg?derivative=micro

http://web.me.com/willm/Site/Photo_Albums/Pages/Camshaft_Measurement_files/Media/Maruha_272_Intake_Graph_2.jpg?derivative=mip

<div style="padding: 0px; " class="image_cluster_layout_style_default_External_191_30"><div class="image_cluster_layout_style_default"><p style="padding-top: 0pt; " class="Caption">Maruha Racing Intake Camshaft<br/></p><p style="padding-bottom: 0pt; " class="Caption">The short “ramps” at the leading and trailing ends of the acceleration and lift graphs are there to take up the lash.  Nicely shaped!</p></div></div> Maruha_272_Intake_Cam_Card Basic camshaft information. When a manufacturer says that their cam has xxxx degrees of duration, it is important to know the amount of lift that duration is stated at. This cam card has readings at 3 different durations: 0.006”, 0.020”, and 0.050”. Seems that Maruha’s 272° of duration was likely measured at 0.010” of lift. http://web.me.com/willm/Site/Photo_Albums/Pages/Camshaft_Measurement.html#7 b8eb3394-8f71-4220-84ae-dd74e540a1cd http://web.me.com/willm/Site/Photo_Albums/Pages/Camshaft_Measurement_files/Media/Maruha_272_Intake_Cam_Card.jpg?derivative=thumb http://web.me.com/willm/Site/Photo_Albums/Pages/Camshaft_Measurement_files/Media/Maruha_272_Intake_Cam_Card.jpg?derivative=micro

http://web.me.com/willm/Site/Photo_Albums/Pages/Camshaft_Measurement_files/Media/Maruha_272_Intake_Cam_Card.jpg?derivative=mip

<div style="padding: 0px; " class="image_cluster_layout_style_default_External_191_30"><div class="image_cluster_layout_style_default"><p style="padding-top: 0pt; " class="Caption">Maruha_272_Intake_Cam_Card<br/></p><p style="padding-bottom: 0pt; " class="Caption">Basic camshaft information.  When a manufacturer says that their cam has xxxx degrees of duration, it is important to know the amount of lift that duration is stated at.  This cam card has readings at 3 different durations: 0.006”, 0.020”, and 0.050”.  Seems that Maruha’s 272° of duration was likely measured at 0.010” of lift.</p></div></div> Maruha Racing Exhaust Camshaft http://web.me.com/willm/Site/Photo_Albums/Pages/Camshaft_Measurement.html#8 a6628bd4-9936-4615-8ba2-e6173b214fb5 http://web.me.com/willm/Site/Photo_Albums/Pages/Camshaft_Measurement_files/Media/Maruha_264_Exhaust_Graph_2.jpg?derivative=thumb http://web.me.com/willm/Site/Photo_Albums/Pages/Camshaft_Measurement_files/Media/Maruha_264_Exhaust_Graph_2.jpg?derivative=micro

http://web.me.com/willm/Site/Photo_Albums/Pages/Camshaft_Measurement_files/Media/Maruha_264_Exhaust_Graph_2.jpg?derivative=mip

<div style="padding: 0px; " class="image_cluster_layout_style_default_External_191_30"><div class="image_cluster_layout_style_default"><p style="padding-bottom: 0pt; padding-top: 0pt; " class="Caption">Maruha Racing Exhaust Camshaft</p></div></div> Maruha_264_Exhaust_Cam_Card http://web.me.com/willm/Site/Photo_Albums/Pages/Camshaft_Measurement.html#9 a99b6a1f-aea8-4196-9105-3d402c3a7bdf http://web.me.com/willm/Site/Photo_Albums/Pages/Camshaft_Measurement_files/Media/Maruha_264_Exhaust_Cam_Card.jpg?derivative=thumb http://web.me.com/willm/Site/Photo_Albums/Pages/Camshaft_Measurement_files/Media/Maruha_264_Exhaust_Cam_Card.jpg?derivative=micro

http://web.me.com/willm/Site/Photo_Albums/Pages/Camshaft_Measurement_files/Media/Maruha_264_Exhaust_Cam_Card.jpg?derivative=mip

<div style="padding: 0px; " class="image_cluster_layout_style_default_External_191_30"><div class="image_cluster_layout_style_default"><p style="padding-bottom: 0pt; padding-top: 0pt; " class="Caption">Maruha_264_Exhaust_Cam_Card</p></div></div> Intake_Cam_Comparison_Graph copy http://web.me.com/willm/Site/Photo_Albums/Pages/Camshaft_Measurement.html#10 22a9dffd-4454-4075-8d3f-8bb5cc1b1684 http://web.me.com/willm/Site/Photo_Albums/Pages/Camshaft_Measurement_files/Media/Intake_Cam_Comparison_Graph_2.jpg?derivative=thumb http://web.me.com/willm/Site/Photo_Albums/Pages/Camshaft_Measurement_files/Media/Intake_Cam_Comparison_Graph_2.jpg?derivative=micro

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<div style="padding: 0px; " class="image_cluster_layout_style_default_External_191_30"><div class="image_cluster_layout_style_default"><p style="padding-bottom: 0pt; padding-top: 0pt; " class="Caption">Intake_Cam_Comparison_Graph copy</p></div></div> Exhaust_Cam_Comparison_Graph copy http://web.me.com/willm/Site/Photo_Albums/Pages/Camshaft_Measurement.html#11 f5f56349-f75b-4228-90d8-2b046e054162 http://web.me.com/willm/Site/Photo_Albums/Pages/Camshaft_Measurement_files/Media/Exhaust_Cam_Comparison_Graph_2.jpg?derivative=thumb http://web.me.com/willm/Site/Photo_Albums/Pages/Camshaft_Measurement_files/Media/Exhaust_Cam_Comparison_Graph_2.jpg?derivative=micro

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<div style="padding: 0px; " class="image_cluster_layout_style_default_External_191_30"><div class="image_cluster_layout_style_default"><p style="padding-bottom: 0pt; padding-top: 0pt; " class="Caption">Exhaust_Cam_Comparison_Graph copy</p></div></div>