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Engine/Tuning
Bouncing MAF Counts
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<blockquote data-quote="MalcolmV8" data-source="post: 15440402" data-attributes="member: 8854"><p>If MAF counts were bouncing between 0 and 770 counts the car wouldn't even run. Are you sure you're data logging the right thing? I've had a car with turbulence I was tuning a while ago that was bouncing between 155 and 195 or so at idle and it made the car sound like it was heavily cammed and surged like crazy. Drivability sucked at low loads too. We're only talking about 40 counts bouncing here, you're saying 770.</p><p></p><p>To fix the turbulence I put on an aluminum screen like this before the MAF sensor.</p><p></p><p><img src="https://lh3.googleusercontent.com/0IebyvjBlLEEzsfDqpRAiNDO9wJfhaWoml3i5zcv-J8BPOMcBk0nqsI8TVtOVVwdtEp5Y-xDciZ5LpRzd5mLUqzMMt8dpmlWrQhrSq5QZ32mB5CunruPM-Pk3cDqbuFSFELcxKbh3mJEwHfhGX4ye5IMx8wIj8TQae01T3kbZqvkIrbmNpA_IBbVT3qQP-KWL4XVPn6j1vcT-7ZrLmEK4nghWw3G7lzbF7VlyEoMyfOao2spyg--oan1U6xVR5r2oGp8fF6hU-nJJRYf38R-uC07wptSuSytbPBEfyK_IA-222sJRkZPKaLr4WviIgehnm-XXtbff3DJRXjzUd6MB6pWCjTZ3a5kH3pgnLZhwZPVULZsSpMD9iDeTTXxJxg8pS_RSHfM69AYi_IFnIXAMF2rIZVSV_xl5c4B3M1ze64oy86MzNLGXTHCC-JaIGEwCgaYTpbRheMiJt6b3IhDZfnXZ8nOIZgNvMN8KjC5Wkg77l6lOCU0JRDWIJh5mDwrRtuk4dO5TARf5n8pgwbIL4fkfR_Uk64qTafguIQVl_kALIpyhcXmnQPFXsJ9oiWvpbfUIdLlj8hlfe3VRnWGr6P_79wDUVFqEwB8laxywp7IWCY7=w971-h728-no" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p><img src="https://lh3.googleusercontent.com/sRyZ0edw2TzmS5CD37ORMIM9iQ2smWHwlZuP6s9gv-NNkee7D0ji_Jy2uzIxHfx5HmYxbCEltZJ55cSkYJuhfDvJb0liZVMo9-G4-tMDR_HR4ejjxace_-2zGx0WNKyni83AYxeYz9w3zxkf78Wt2zsm9n7UeTJulEKIboD-O38hiGZXgU3Qd4QGY_nDxARAxX8jdbFdVoGhy5xMahNrFdSEeNfMMi_7v47tbHYj-3d35_lEHfOMPJq3ScoIpOvNy-JsAhCH0Od63RADu4CaNeP2Dhb-QghoIfcYViVj0dSfuK2ziDVAQ0J-igqX7NQks2IH1GwzYbCXyhV2yezpWwilmKz6yT_BkoGoz6LU_S4PlFpVxaVHcPTOyuNrb2iGn2wFJnOZOGVW1fXIYD2zsN7X7mA_ymqI-YILtRxFgi4_SzhXEW8iHBYHE-P4OQcuc4w6vM6p0zV9krfYgzuiYEa8yyfNI54OU4JhAU_Z4W5gEEcMLIzqWdFW6LGkRedJpYrDT03R_4AlOhFHYY2Kstxmm-gcOzThUBnGvKNMYVbDsImWnqMLKbQVizxlTkY9nQbpVlvLT2opGmo1_z1Ys5nd533xvAeR6W8Xy6W1oeVnewxd=w546-h728-no" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p>That made a huge difference. My data logs went from this</p><p></p><p><img src="https://lh3.googleusercontent.com/r3Pu0vgOPULA69YTdYccPCwUFgbVHSSlnIbRRhdocoR3FpzC7J4EfIcOo1AOnbIbHVzE7ATb4_XF_dtkPZLROFG3rr8oBuaW4PVoQ2HH_3qLOpcBGfsjcDdyEdfEzJIgH3Yag2gYCl9bUbrbs4oMrIA7_aDKY_Rhs8rIQT85JN7a4CehBAdPZpj7COhGoklAb4170vbCX_vIKkFyhEPrxwETuPscdFjfdqtrtviQVYFUwru-NteNuf5seikshPnr7f7BJRIgJpT31-EyC00gCwk-iygGwplzVMK2m2LqYjox-5HM076882vGJamMy-RVUrBn2UAxmvHjQaRZ39pwep-FL3Qim6nFVJcQqaB6adqF2p1i-gPC4fgZNbMgpQfdMvcAmoVtAHEOg-72iRSJ3OPUGVmJzXa7qjnKwc_FTNok941t9BEWwU_QWh-czSG2oiA4Gv-_k1wtKCPJZMThyCBz6SjPb_m8AvbafDsPjEcxVC-J7UMzr9zDNbkcD4qNJsXrPN1eOlNX8zhTXuKjHENVnLjxg5NQmGY5yCBWmk79SnS8Vo_ecrC8KcwqTVQoqs-K4_-E5S-qbD5-701VyVXJ7-S6w1y4ZsrqOgHgRilUrlht=w896-h518-no" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p>To this</p><p></p><p><img src="https://lh3.googleusercontent.com/wGitvQhNGYR7bbknpxJWSidHVzDlFWWQmy_e-wMB8ipqSsg1PPn7nYZj3G0Km1fic-hUrJVKNyrJqfVb2PRq3XHnf0m16wRCAZ3oFVYZ8j18Vfzvy3RmerrFTbqfRKOJjRu1RS9h1hwVcQA5Xy3mtBU68KGzcqzibAjGGtQnwtdSXVsFn2nmzRc0eXDJcdgdlv9A7k8MWvLUEaOWuhIoJOdr_w_KXygNbxW9ylZ4KqzudOYa8JcSDi9nOzVpJ4jemIb_ysDSBwZ6WNyJq3tdt_koWMevH2pOI_YeCFy07jsnpZqZOWcMI5LxzZ25--I58XlhTSfCEyBEtpuE2g3KrXZ4agxt7TqySVxa8Yy_wWH-xRzsTLHMQuo1SQjlDA4b3N62RsGNOqmAh-4yiQoz37RsaejOYf_tmEb3CTBXqQX8l8wbLnrIYnWrTPBg7QtHiBTqg-NTV-oeZAk_ViafqA1eZTPVWv-7iiq1OUyJ4lsjCb4yQxqBBIYSyTWsNXGYTjGUg9k3dGilxxxYehc_kfQdpoyhvO0brsT9L0wxAVhZ7TSCv1Cxz1WkzEJwsqKyS3fpspBsdKFD1HdtsnljINvI0zpH9Napfe67-8cBQ53M0pU-=w897-h487-no" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p></blockquote><p></p>
[QUOTE="MalcolmV8, post: 15440402, member: 8854"] If MAF counts were bouncing between 0 and 770 counts the car wouldn't even run. Are you sure you're data logging the right thing? I've had a car with turbulence I was tuning a while ago that was bouncing between 155 and 195 or so at idle and it made the car sound like it was heavily cammed and surged like crazy. Drivability sucked at low loads too. We're only talking about 40 counts bouncing here, you're saying 770. To fix the turbulence I put on an aluminum screen like this before the MAF sensor. [IMG]https://lh3.googleusercontent.com/0IebyvjBlLEEzsfDqpRAiNDO9wJfhaWoml3i5zcv-J8BPOMcBk0nqsI8TVtOVVwdtEp5Y-xDciZ5LpRzd5mLUqzMMt8dpmlWrQhrSq5QZ32mB5CunruPM-Pk3cDqbuFSFELcxKbh3mJEwHfhGX4ye5IMx8wIj8TQae01T3kbZqvkIrbmNpA_IBbVT3qQP-KWL4XVPn6j1vcT-7ZrLmEK4nghWw3G7lzbF7VlyEoMyfOao2spyg--oan1U6xVR5r2oGp8fF6hU-nJJRYf38R-uC07wptSuSytbPBEfyK_IA-222sJRkZPKaLr4WviIgehnm-XXtbff3DJRXjzUd6MB6pWCjTZ3a5kH3pgnLZhwZPVULZsSpMD9iDeTTXxJxg8pS_RSHfM69AYi_IFnIXAMF2rIZVSV_xl5c4B3M1ze64oy86MzNLGXTHCC-JaIGEwCgaYTpbRheMiJt6b3IhDZfnXZ8nOIZgNvMN8KjC5Wkg77l6lOCU0JRDWIJh5mDwrRtuk4dO5TARf5n8pgwbIL4fkfR_Uk64qTafguIQVl_kALIpyhcXmnQPFXsJ9oiWvpbfUIdLlj8hlfe3VRnWGr6P_79wDUVFqEwB8laxywp7IWCY7=w971-h728-no[/IMG] [IMG]https://lh3.googleusercontent.com/sRyZ0edw2TzmS5CD37ORMIM9iQ2smWHwlZuP6s9gv-NNkee7D0ji_Jy2uzIxHfx5HmYxbCEltZJ55cSkYJuhfDvJb0liZVMo9-G4-tMDR_HR4ejjxace_-2zGx0WNKyni83AYxeYz9w3zxkf78Wt2zsm9n7UeTJulEKIboD-O38hiGZXgU3Qd4QGY_nDxARAxX8jdbFdVoGhy5xMahNrFdSEeNfMMi_7v47tbHYj-3d35_lEHfOMPJq3ScoIpOvNy-JsAhCH0Od63RADu4CaNeP2Dhb-QghoIfcYViVj0dSfuK2ziDVAQ0J-igqX7NQks2IH1GwzYbCXyhV2yezpWwilmKz6yT_BkoGoz6LU_S4PlFpVxaVHcPTOyuNrb2iGn2wFJnOZOGVW1fXIYD2zsN7X7mA_ymqI-YILtRxFgi4_SzhXEW8iHBYHE-P4OQcuc4w6vM6p0zV9krfYgzuiYEa8yyfNI54OU4JhAU_Z4W5gEEcMLIzqWdFW6LGkRedJpYrDT03R_4AlOhFHYY2Kstxmm-gcOzThUBnGvKNMYVbDsImWnqMLKbQVizxlTkY9nQbpVlvLT2opGmo1_z1Ys5nd533xvAeR6W8Xy6W1oeVnewxd=w546-h728-no[/IMG] That made a huge difference. My data logs went from this [IMG]https://lh3.googleusercontent.com/r3Pu0vgOPULA69YTdYccPCwUFgbVHSSlnIbRRhdocoR3FpzC7J4EfIcOo1AOnbIbHVzE7ATb4_XF_dtkPZLROFG3rr8oBuaW4PVoQ2HH_3qLOpcBGfsjcDdyEdfEzJIgH3Yag2gYCl9bUbrbs4oMrIA7_aDKY_Rhs8rIQT85JN7a4CehBAdPZpj7COhGoklAb4170vbCX_vIKkFyhEPrxwETuPscdFjfdqtrtviQVYFUwru-NteNuf5seikshPnr7f7BJRIgJpT31-EyC00gCwk-iygGwplzVMK2m2LqYjox-5HM076882vGJamMy-RVUrBn2UAxmvHjQaRZ39pwep-FL3Qim6nFVJcQqaB6adqF2p1i-gPC4fgZNbMgpQfdMvcAmoVtAHEOg-72iRSJ3OPUGVmJzXa7qjnKwc_FTNok941t9BEWwU_QWh-czSG2oiA4Gv-_k1wtKCPJZMThyCBz6SjPb_m8AvbafDsPjEcxVC-J7UMzr9zDNbkcD4qNJsXrPN1eOlNX8zhTXuKjHENVnLjxg5NQmGY5yCBWmk79SnS8Vo_ecrC8KcwqTVQoqs-K4_-E5S-qbD5-701VyVXJ7-S6w1y4ZsrqOgHgRilUrlht=w896-h518-no[/IMG] To this [IMG]https://lh3.googleusercontent.com/wGitvQhNGYR7bbknpxJWSidHVzDlFWWQmy_e-wMB8ipqSsg1PPn7nYZj3G0Km1fic-hUrJVKNyrJqfVb2PRq3XHnf0m16wRCAZ3oFVYZ8j18Vfzvy3RmerrFTbqfRKOJjRu1RS9h1hwVcQA5Xy3mtBU68KGzcqzibAjGGtQnwtdSXVsFn2nmzRc0eXDJcdgdlv9A7k8MWvLUEaOWuhIoJOdr_w_KXygNbxW9ylZ4KqzudOYa8JcSDi9nOzVpJ4jemIb_ysDSBwZ6WNyJq3tdt_koWMevH2pOI_YeCFy07jsnpZqZOWcMI5LxzZ25--I58XlhTSfCEyBEtpuE2g3KrXZ4agxt7TqySVxa8Yy_wWH-xRzsTLHMQuo1SQjlDA4b3N62RsGNOqmAh-4yiQoz37RsaejOYf_tmEb3CTBXqQX8l8wbLnrIYnWrTPBg7QtHiBTqg-NTV-oeZAk_ViafqA1eZTPVWv-7iiq1OUyJ4lsjCb4yQxqBBIYSyTWsNXGYTjGUg9k3dGilxxxYehc_kfQdpoyhvO0brsT9L0wxAVhZ7TSCv1Cxz1WkzEJwsqKyS3fpspBsdKFD1HdtsnljINvI0zpH9Napfe67-8cBQ53M0pU-=w897-h487-no[/IMG] [/QUOTE]
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