How to calculate IVC @ABDC?
How to calculate IVC @ABDC? I have my cam card but it does not show IVC @ ABDC @.006 which I understand is the number I need It does show it @ .050 to be 47. It Can someone point me in the right direction. Thanks for any help.
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I understand how, I'm just not sure I'll explain it clearly. Let's assume an advertised duration of 280 degrees at 0.006", and an intake centerline of 110 degrees.
280 / 2 = 140 - 110 = 30 + 180 = 210. 280 - 210 = 70. So, IC at 0.006" = 70 degrees after bottom dead center. The 180 is a constant, because that's how many degrees for the intake stroke.
Now, how about a 284 on a 111?
284 / 2 = 142 - 111 = 31 + 180 + 211. 284 - 211 = 73
Got it?
Now do yours for us.
280 / 2 = 140 - 110 = 30 + 180 = 210. 280 - 210 = 70. So, IC at 0.006" = 70 degrees after bottom dead center. The 180 is a constant, because that's how many degrees for the intake stroke.
Now, how about a 284 on a 111?
284 / 2 = 142 - 111 = 31 + 180 + 211. 284 - 211 = 73
Got it?
Now do yours for us.
Last edited by ronnjonn; Aug 10, 2011 at 10:30 PM.
I understand how, I'm just not sure I'll explain it clearly. Let's assume an advertised duration of 280 degrees at 0.006", and an intake centerline of 110 degrees.
280 / 2 = 140 - 110 = 30 + 180 = 210. 280 - 210 = 70. So, IC at 0.006" = 70 degrees after bottom dead center. The 180 is a constant, because that's how many degrees for the intake stroke.
Now, how about a 284 in a 111?
284 / 2 = 142 - 111 = 31 + 180 + 211. 284 - 211 = 73
Got it?
Now do yours for us.
280 / 2 = 140 - 110 = 30 + 180 = 210. 280 - 210 = 70. So, IC at 0.006" = 70 degrees after bottom dead center. The 180 is a constant, because that's how many degrees for the intake stroke.
Now, how about a 284 in a 111?
284 / 2 = 142 - 111 = 31 + 180 + 211. 284 - 211 = 73
Got it?
Now do yours for us.
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So are you saying the above formula is incorrect? Or this is just a different way to find it.
How do I find out the IVO on my card? Sorry for the ignorance I’m just trying to learn and make sure I get all my ducks in a row and know I have it right.
Edit: It looks to me that this might give me the IVC @.050? 47 but I was needing @.006
How do I find out the IVO on my card? Sorry for the ignorance I’m just trying to learn and make sure I get all my ducks in a row and know I have it right.
Edit: It looks to me that this might give me the IVC @.050? 47 but I was needing @.006
Last edited by ABQ99TA; Aug 12, 2011 at 09:50 AM.
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