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Power Strokes
7.3 Aftermarket
FFD Rail System
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[QUOTE="blacksmoke.r.us, post: 1536549, member: 5336"] I dont know if this equation is being explained exactly right. This Hagen-Poiseuille equation is for a constant pipe size diameter. In this case the pipe sizes are changing in the same system. Also its meant for a constant velocity which in the case of a heui system that is ever changing. If you increase the radius of the pipe it makes for a larger area. A larger area means more volume. More volume means you need more pump to make up the difference. If you decrease the total volume needed then you need less pump to meet demand. Ask youself this if you fill a gallon jug and a 5 gallon bucket which will take longer if the flow rate filling both is the same. If you incease volume of a given system you need more flow rate to fill it. You can either increase pressure to fill faster or decrease the volume of the system. Thats what these new oil rails do, they decrease the volume of the system needing less pump to meet the demand of the given injector. If this didnt work the adrenaline wouldnt be able to keep up with the demand of the injectors. Who knows of a truck that is running 400/300 with a single adrenaline? This was copied from dieselsite's web page OUR ADRENALINE PUMP IS DESIGNED FOR USE WITH THE FOLLOWING INJECTOR SIZES: AA Code Single Shot -94-97 7.3L - stock to 200cc AB Code Split Shot - Early 99 and California 97 7.3L - stock to 175cc AD Code Split shot - 99.5-2003 7.3L - stock to 175cc AC Code Single Shot - T444E and 7.3L aftermarket - stock to 200cc AD Hybrids - 7.3L aftermarket - up to 285cc Even dieselsite explains that the pump cant keep up with hybrid injectors larger than 285cc. If the pump supprted more volume they would know. Also FFD is a great company and wouldn't put their rep on the line to make a little extra dough. These are cheap compared to a pump needed to support high demand systems. [/QUOTE]
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