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Originally Posted by THE EVIL TW1N
i really dont know EXACTLY why, im told the DOHC heads flow better BUT just looking at flow numbers that isnt exactly the case. I think theres more at work than just flow numbers.....its magic......jk but theres probably other characteristics (other than just hard numbers) that make the DOHC better for boost i think.
To say their no different is kinda wrong though, the power levels might be similar but the DOHC's do it with less displacement. Theyre already working on a supercharger for the 5.0 that should put down 520ish RWHP @ only 7psi. I believe a supercharger upgrade for the 6.2 netted someone on here RWHP in the high 400's
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You're right, all the warranty-backed LS3 packages seem to be in the high 400's, which I think suggests that's the "safe level" for the stock engine internals (and I think they're also running around 7psi).
This upcoming SC for the 5.0, will Ford offer it as a warranteed package?