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Message: [QUOTE="SkySki Jason, post: 111517, member: 1118"] Good point. Then what is different from one truck to another? If I put my old stock charger that never surged in my truck with stock injectors or 175cc single-shots on a truck with nasty surge on stock sticks, would it surge? The same PSD guru who told me he thought the surge was due to casting differences also said a Ford factory tech told him they pulled as many as 1 in 20 engines off the line because 'they made too much HP'. I dunno how much stock to put in all that, but I've never heard a better explanation. If all the tolerances line up in your favor, you got a factory hot rod, but if they are all at the minimum, ya got a factory turd. I can say after monitoring ICP on a number of trucks, its amazing how much better an 'all stock' truck that holds 2800psi runs than one that only makes 2100psi. Could this be from factory tolerances as well? Isn't surge generally blamed on excessive drive pressure? What other variation could there be from one engine to the next that could affect that? [/QUOTE]

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