So I had to pay the piper, luckily I found someone local with them in stock. Gave me a discount and used our resale card to a price of $1488, anywho, here they are
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Shiny... whats your address? :p
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How much did you get done last night?
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Degreed the camshaft tonight. it was a complete cluster fuck, but for other reasons. anywho, Ron was having an issue with this one coming into spec. I started off by installing it at the 6* advanced like he did. here's what I got
112.5 LC 215/220 -5 & 40 -1.5 & 41 These are no where near the specs on the card, so I installed it at the 4* like in my motor and here's what I got 114 LC 217/217 -5 & 42.5 -5 & 42.5 So like I thought the cam was too advanced and makes sense why it came in at 112. Now it's right on the money and came in perfectly. |
That doesn't make sense. If you retard the cam 2 degrees the the IO would occur 2 degrees later and would be -3 instead. The duration at 0.050 will be the same no matter whether the ICL is 112 or 114.
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Then the only answer is the cam is asymmetrical. I checked it, over and over, did it probably 20 times tconfirrm, it was right on.
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That doesn't explain it. An asymmetrical lobe just has a different closing profile than opening profile. The IO would still occur at -3 if you retarded it 2 degrees and the duration at .050 would still be 215/220 no matter what the ICL is.
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I even installed it at 8* to see the change at it was at 110.5 but didnt do the rest, It was about 3 am and I was low on sleep to begin with. Put it back at 4* and it came in the same every time, -5 and 217. I'm not going to pull it back out to try and track it down. |
Don't know much about cams other than what they do generally. What's IO and ICL?
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