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[QUOTE]Originally posted by Mr.10psi: [QB] [QUOTE]Originally posted by Tom Renzo: [qb] WELL got this from the speck sheets from several cam manufacturer for checking PV clearance. If you are going to use rocker arms with a higher than stock rocker ratio now or in the future, you will need to check piston to valve clearance with the higher ratio rocker at this time. (Higher ratio rockers increase gross valve lift). And can decrease piston to valve clearance. Here is another engine builder that just does ford engines. QUOTE!! Most ford engines with a valve lift of less than .500" should be good to go in regards to P/V clearance. If higher lifts are anticipated you should check the piston to valve clearance on Ford engines. Thank you [/qb][/QUOTE]dude just give up, your knowledge on cams is making you look ignorant. Where do you think the piston is at during max valve lift which is why clearance is irrelevant. What do you think its doing at max valve lift? As far as the engine builder that you quoted that only builds ford engines, i would run away as far as i could from that guy, and whats especially sad is that he builds only ford engines and doesnt know this. Face palm. Your need to get away from the old outdated prehistoric tech bad info that is passed around like this max valve lift crap. Ed curtis one who is very knowleagable was laughing his ass off when trickflow said that max lift over 600 was not gonna work with a stock set of pistons and small trickflow 170cc. Yet he ended up putting 605 on both the intake and exhaust side. But no, trickflow is a manufacturer and they know everything. Blah blah blah. [/QB][/QUOTE]
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