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Valve Springs?


Vehicle Information: Year: 2001; Engine (Size, Modifications): 3.8 L; Total Mileage: 3600;

I am building a new motor. It includes GT3R crankshaft, Ruf titanium rods, GT1 oil pump, Wossner 102 mm pistons/liners, GT3 Cup heads, valves and hydraulic lifters. My question is about the valve springs. I have recieved conflicting information from two very well known tuners. One says the GT3R valve springs will work fine, the other says don't use them, use the GT3 Cup valve springs. The motor is being designed to redline at 8000 rpms. Which springs would be more appropiate and why?

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