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Old 08-20-2007, 04:25 AM
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Join Date: Aug 2005
Location: Toronto, Canada, Ont
Cobra Make, Engine: Shelby CSX 4995, Keith Craft built 427 SO
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Quote:
Originally Posted by 4pipes
Ray, synthetics are not recommended for FE's with flat tappet cams. It's a separate problem than ring sealing. Crane cams states on their website that synthetics may be too slippery for the lifters to rotate adequately in their guides (not enough friction between the lifter and the cam), and that if the cars are not started regularly, the oil will drain off the cam faster than conventional oils.
When I picked up my 427 from Keith Craft this summer, I asked him which oil I should use. His recommendation was "any good quality conventional oil." I think there have been other threads that Keith has been quoted as saying the same thing.
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"The 427 Cobra is easily the highest performance car ever sold for street use. A decent 427 - not the worst, not the best, will go from zero to 100 mph and back down again to zero in less than 14 seconds. All thing considered, you can put together a pretty good argument that the 427 Cobra is the ultimate performance car, judged on any basis you want to name." Taken from; Corvette, The Sensuous American
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