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Original Message
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| RE: valve spring pressure |
| By afret - 12/17/2002 12:31:22 AM; IP 198.81.26.206 |
It should work ok just like Royce said earlier. (Royce is one of the FE/427 Cougar experts in another FE forum.) I think you will have about 320-330 lbs open pressure with your cam. You just have to be careful to set the spring height since 1.92 seem a little high for standard FE heads unless the valve are sunk. You might need to get the +.05 keepers and shim from there to the correct height so you don't get too much spring pressure. If you look look at Crower they have two spring choices for their hotter hydraulic and solid cams. Your springs are like their second choice which gives 1000 or so more rpm potential than their other choice which is more like the springs Crane recommends. You might look at the Crower catalog. They recommend the stronger springs for limited street use and the weaker springs for daily use. I run a Crower hydraulic #16255 and run their stronger recommended spring. I used to run Isky 8005-a springs which has the same seat pressure at the recommended height but had more open pressure with no problems with this cam, a wilder Crower hydraulic and a Crane solid. Another thing to consider is valvetrain stability/strength when you go above 300# open pressure. It gets risky with stock rocker shafts and the stock aluminum stands. You might consider getting endstands to eliminate the chance for breakage of the shaft on the outboard ends. Another choice is to upgrade to stronger rocker shafts and split rocker stands-you can add endstands to this too and have a bullet proof valvetrain.
Hope this is of some help. |
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