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6.7 rail vs 5.9 rail

911 Views 6 Replies 5 Participants Last post by  dieselwrencher
im gathering parts and am planning on building a 6.7 long block for next years pull truck a early 04. was looking over the fuel rails on the 2 engines tonight and debate trying to use the 6.7 rail for size reasons mostly,but id have to adapt the 5.9 sensors to it, are the 6.7 injectors and rails good for more rail pressure than the 5.9?? don has said the 6.7 injector bodys wont work with the 5.9 ecm. anyone have any info on these comparisions??
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Not 100% but i could swore i read somewhere the 5.9 rail is actually bigger inside of the rail?? not certain tho... but also as far as more RP i would think they are both rated for the same peak psi.. Have you checked into modified rails?? They suppose to be helpful to some extent and basically are bored out bigger
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