What heads?
With a cam of that size Use the stock LS6 valves, with suitable springs, mill the heads .005, a good port job, and do a nice valve job and be done with it. Keep your stock rockers do a trunnion upgrade on them and have as much fun as you can. You will have a very light and stout valve train.
With a cam of that size Use the stock LS6 valves, with suitable springs, mill the heads .005, a good port job, and do a nice valve job and be done with it. Keep your stock rockers do a trunnion upgrade on them and have as much fun as you can. You will have a very light and stout valve train.
853's are ok ported but not as good as 243/799 castings. There is at least one set of 243's on the classifieds now with I believe the the hollow intake/sodium filled exhaust valve. Personally I would run stock valve sizes or go no larger than 2.02/1.57 valves. It is just not needed on a 346/347 ci motor.
And as stated above lift has little to do with PTV and more with duration, LSA and advance as far as a cam goes. Then milling, HG thickness and valve size needs to be considered......
And as stated above lift has little to do with PTV and more with duration, LSA and advance as far as a cam goes. Then milling, HG thickness and valve size needs to be considered......
