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Power Strokes
6.4 Aftermarket
Exhaust Back Pressure
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[QUOTE="Danbonzo, post: 83611, member: 1648"] If EBP drops so does MAP and vice versa so there is a correlation between the two. With an extremely high EP is it fair to say the boost pressure is higher also? And over time with a progressively stretched stock head bolt the higher boost would help to lift the head, in turn compromising the HG? Dunno just thinking out loud how the EBP could cause the gaskets to blow. I can say that with the 6.4 motors the gaskets don't necessarily "blow" when the tell tale puking starts. At least this was the case with my gaskets. When the heads came off the coating on the HG was worn off and a clear path had been worn directly to a coolant passage. The heads were found to be less than 4/1000's off which made them fall within the Ford spec. We decked them anyway and threw 2010 gaskets on, the newer gaskets have been revised and the coating is supposed to be much better than the earlier builds.Mine is an 08 job 3. I did as much research as I could find on the studs and Elites (A1 Technologies) statistically appear to to be the least likely to fail. As of right now anyway, so I went with them, and of course gated it. The bottom line is with the pressures that the big tunes produce I believe its not just one thing that causes the demise of parts but rather a culmination wrongs. Sort of a domino effect if you will, with the EBP being the "Achilles heel" of the bunch. Hopefully she holds this time... [/QUOTE]
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