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Message: [QUOTE="madpowerstroke, post: 385126, member: 5867"] I was told by Matt(Mwilbur516) to check this thread out, I have been very busy trying to get shop in order and new turbos going. I talk with Mwilbur516, for awhile on this whole thing about the boost and tunes. I just wanted to throw some stuff out there for thought. I have a f250 2004 and have a gearhead tune on it. I have never had a problem holding boost at 30-32 the whole way to WOT with a stage 2, so here's something I thought about. Is 2004 EBP sensor the same as the 2005-2007. The reason I ask is that 2004 uses that butterfly plate for egr to limit flow and the 2005-2007 uses the uppipe diverter for the flow into the egr. So was the backpressure range increased in the 2005-2007 ratio between flow, or boost to backpressure, compaired to the 2004 where backpressure ratio is less per flow. I guess what I'm getting at is that if the cast wheel works over the billet wheel due to flow ratio to backpressure being less per backpressure, then if using a 2004 EBP sensor if different or if not using the file numbers for range of a 2004 wouldn't get you the boost and hold you are looking for. I'm not a tuner but have seen alot of crazy things the ecm does when the flow is increased to the point it goes out of the range of the ratio the ecm is trying to calulate. Just something to think about due to FORD changing things up year to year on the 6.0 powerstrokes. Hell I had no idea that FORD produced mass air flow and air density options in the same year trucks. [/QUOTE]

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