What is the advantage to ZO6 valves
02-22-2006, 06:36 PM
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What is the advantage to ZO6 valves IF you were doing a very mild port job on LS1 heads, NOT the ZO6 head, and used the lightweight ZO6 valves that GM put in the production cars, is there an advantage? If the valve train is lighter then you should be able to use lighter open pressure valve springs and still have excellent RPM before valve float. I know the valves are longer then the stock LS1 jobs, but if your ordering pushrods anyway, just get the correct length and that is not an issue...right?? Then is there any real advantages to these valves over the standard LS1 pieces?? I do not plan on putting oversize valves in the heads, or will not use Stage ???? with the oversize as the car is not hitting the RPM that they will "do a better job" at so why loose the bottom end power. I've used and do use the "bigger" head systems, but the performance is almost the same down low, so why bother. I do not want the tall gears and high rpm bands of the "ultra" race setup, this is a dual purpose car and I want gas mileage and performance. Just so you know, my Vette ran 11.30 @ 120 thru the cats, stock exhaust and gets 28 mpg on the highway and is emissions legal, so it can be done and if I did not get a bad cam the new converter would have made the car even faster, by the way it's also 3500 lbs while racing.
