Piston too valve clearnce? cam motion 236/250 .612/.612 114+4 lsa
05-28-2012, 04:22 AM
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Piston too valve clearnce? cam motion 236/250 .612/.612 114+4 lsa I have a cam motion nitrous cam that is a 236/250 .612/.612 114+4 lsa and I was wondering if I was going to have any piston too valve clearance issues with this cam?
05-28-2012, 09:12 PM
#5
Brandon,
You will more than likely have clearance issues on the exhaust side. From what I've experienced, mid 240's is about the highest in duration you can get away with on an unmilled head before things get too close for comfort. But then again, I've measured some mid 230's cams that needed flycutting.
I would absolutely positively NOT install that cam without checking PTV clearance. It will more than likely not clear. A checker spring and dial indicator is in order here.
You will more than likely have clearance issues on the exhaust side. From what I've experienced, mid 240's is about the highest in duration you can get away with on an unmilled head before things get too close for comfort. But then again, I've measured some mid 230's cams that needed flycutting.
I would absolutely positively NOT install that cam without checking PTV clearance. It will more than likely not clear. A checker spring and dial indicator is in order here.
05-28-2012, 11:48 PM
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Brandon,
You will more than likely have clearance issues on the exhaust side. From what I've experienced, mid 240's is about the highest in duration you can get away with on an unmilled head before things get too close for comfort. But then again, I've measured some mid 230's cams that needed flycutting.
I would absolutely positively NOT install that cam without checking PTV clearance. It will more than likely not clear. A checker spring and dial indicator is in order here.
You will more than likely have clearance issues on the exhaust side. From what I've experienced, mid 240's is about the highest in duration you can get away with on an unmilled head before things get too close for comfort. But then again, I've measured some mid 230's cams that needed flycutting.
I would absolutely positively NOT install that cam without checking PTV clearance. It will more than likely not clear. A checker spring and dial indicator is in order here.
Last edited by Brandon331; 05-29-2012 at 02:28 AM.
