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IF I would install a tuner on my 05' F250 King Ranch and keep an eye on the turbo and make sure it stays under 25-30 psi would that significantly decrease the chance of popping the head gaskets. Is there a "magic" number or scenario at which the head gaskets seem to pop? My truck has 57,000 miles on it and the only thing it has is a K&N filter.
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Turbo boost is only part of the variables. What really counts is cylinder pressure (CP), and that is driven to a large extent by timing (of fuel injection). Advancing the timing will lead to higher CP's and EGT's, and will (to a certain point) add performance. Obviously, if you inject too many degrees before TDC, too much combustion starts before TDC and that works against you (the piston isn't delivering motive force until after TDC). But as you advance timing, CP goes up. There is a balance. Anyway, the point is, that tuners and chips use strategies that vary, some using (in my opinion), too much timing. The Diablo Predator was notorious for this (lots of pukers with that product). I don't know what chips have the safest profile, but I know SCT can be programmed to do almost anything you want. Hook up with a reputable tuner that knows what he is doing and you'll be set (make sure it is someone who knows how to tune, not just someone who sells them with the factory tunes; Tadd and Robert at Elite can do what you want; whoever you go with does not need to be local; they just email you files and then you download them onto your tuner).