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Lykins Motorsports 427FE Build, Alan Carter
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09-30-2016, 06:43 AM
blykins
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Join Date: Dec 2001
Location: Louisville, KY
Cobra Make, Engine: I'm Cobra-less!
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I run the cam timing pretty advanced on a lot of my engines. This cam was ordered with a 110 LSA, on a 104 ICL. It degreed in at 103.25. When we run that advanced, you can really see how piston to valve clearance is affected. The trend is that when you advance cam timing, intake valve clearance decreases and exhaust valve clearance increases. As you can see in the next two pictures, it's very apparent: intake valve clearance was .100" + head gasket thickness, exhaust valve clearance was a whopping .300" + head gasket.
Valve springs are set up at a nominal 1.900" install height. Valve spring pressures are tested based on install height, full lift, and coil bind.
And if you've never seen a factory MR intake port that approaches 320 cfm, then here's your chance....
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Last edited by blykins; 09-30-2016 at
06:46 AM
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