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By all means, do let us know what's inaccurate.

Eliminating the constriction in a DPF system and breathing clean air by also eliminating EGR will give you some minimal HP gains but if you're looking for say a 10%+ HP boost of a 6.7 F or D or a 6.6 C/G you're going to have to add fuel and/or boost. More fuel + more boost would make more MPG a pretty neat trick.

My '11 6.7L Ford @ 205K Mi was averaging 80-100Mi between re-gen and the average MPG was <15MPG @ 80MPH as a result. I've got 5K hrs and change on the motor and average 19%-21% idle time summer-winter with an average overall speed over the lifetime of ~41MPH. It's mostly road miles on the pickup.

Interesting side note, the car I drive for work traveling 2+ states has also averaged 41MPH over the last 65K Mi. It's not a diesel, but, my driving style and idling habits must not change much between the 2 vehicles. Lots of Interstate @ 80 or other 4-lane @ 75, not very much 55/65 2-lane for either rig.

<blockquote data-quote="SDMF" data-source="post: 378209" data-attributes="member: 412">By all means, do let us know what's inaccurate.&nbsp; Eliminating the constriction in a DPF system and breathing clean air by also eliminating EGR will give you some minimal HP gains but if you're looking for say a 10%+ HP boost of a 6.7 F or D or a 6.6 C/G you're going to have to add fuel and/or boost.&nbsp; More fuel + more boost would make more MPG a pretty neat trick.My '11 6.7L Ford @ 205K Mi was averaging 80-100Mi between re-gen and the average MPG was &lt;15MPG @ 80MPH as a result.&nbsp; I've got 5K hrs and change on the motor and average 19%-21% idle time summer-winter with an average overall speed over the lifetime of ~41MPH.&nbsp; It's mostly road miles on the pickup.Interesting side note, the car I drive for work traveling 2+ states has also averaged 41MPH over the last 65K Mi.&nbsp; It's not a diesel, but, my driving style and idling habits must not change much between the 2 vehicles.&nbsp; Lots of Interstate @ 80 or other 4-lane @ 75, not very much 55/65 2-lane for either rig.</blockquote>

[QUOTE="SDMF, post: 378209, member: 412"] By all means, do let us know what's inaccurate. Eliminating the constriction in a DPF system and breathing clean air by also eliminating EGR will give you some minimal HP gains but if you're looking for say a 10%+ HP boost of a 6.7 F or D or a 6.6 C/G you're going to have to add fuel and/or boost. More fuel + more boost would make more MPG a pretty neat trick. My '11 6.7L Ford @ 205K Mi was averaging 80-100Mi between re-gen and the average MPG was <15MPG @ 80MPH as a result. I've got 5K hrs and change on the motor and average 19%-21% idle time summer-winter with an average overall speed over the lifetime of ~41MPH. It's mostly road miles on the pickup. Interesting side note, the car I drive for work traveling 2+ states has also averaged 41MPH over the last 65K Mi. It's not a diesel, but, my driving style and idling habits must not change much between the 2 vehicles. Lots of Interstate @ 80 or other 4-lane @ 75, not very much 55/65 2-lane for either rig. [/QUOTE]

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