My custom grind cam specs.
02-11-2014, 05:02 PM
#22
FormerVendor
Join Date: Nov 2012
Location: Dyno Tuning in KY
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The best method to truly calculate PTV is to physically measure it mocked up on the engine but you can also take a spring off and measure valve free drop. This will give you an idea of how much the valve can open until the edge of the valve meets the plane of the head surface.
3400 stall will work depending on ICL. Generally I would like seeing that cam on a 108 ICL with the larger runner head. On the stock 241 heads that I had I opted to move the IVC point out a little further to grasp the top end power I was after and it worked well and had a nice single arch torque curve! I later installed TEA St2 799 heads that had been milled to 62cc and i def had to flycut the pistons at that point. But the combo didn't really work well with the cylinder heads. The cam really needed to be advanced a couple degrees to make use of the larger heads. This is why it's important to match the combo of parts and not just random parts from various vendors.
3400 stall will work depending on ICL. Generally I would like seeing that cam on a 108 ICL with the larger runner head. On the stock 241 heads that I had I opted to move the IVC point out a little further to grasp the top end power I was after and it worked well and had a nice single arch torque curve! I later installed TEA St2 799 heads that had been milled to 62cc and i def had to flycut the pistons at that point. But the combo didn't really work well with the cylinder heads. The cam really needed to be advanced a couple degrees to make use of the larger heads. This is why it's important to match the combo of parts and not just random parts from various vendors.
