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Message: <blockquote data-quote="garrittpwl" data-source="post: 1569838" data-attributes="member: 21560">dyno graph is with the 70/65 .68 AR. That is the MAF I'm running (HPX-E). Running SCT Tuner, load % doesnt exceed 2.0 so I'm not maxing the maf. Car runs on rotella t4 15-40. Ford GT Exhaust lash adjusters and followers (on both intake and exhaust valves). The only reason I think its NOT valve float is because it does it at the same RPM regardless of boost. Theoretically if I double the boost, it should lose max RPM (if boost was causing valve float). You can see here in the datalog from the dyno pull that the RPM(grey) continues to climb without issue while the MAF(red) slowly stops flowing. At the same time that the MAF stops increasing the Load(upper orange) falls as the rpms increase. I really think my issue here is airflow and the engine is getting choked in the upper RPMS. No clean dyno pull for the 78/75 .96 but if feels like its doing the exact same thing but at 5600 instead of 5200. AFR stays constant at 10.5-11 during the pulls as well. [ATTACH=full]43182[/ATTACH]</blockquote>