No, mine is the 180hp, pretty sure that's what most 97s have with the auto trans & 3.55 gear. I think the 215hp came in the manual trucks? Thanks for the inputs guys, but the fuel plate numbering system still has me confused.
I need to change the injectors, these are original units and have 408,000 on them. Maybe this engine has lasted so long and is in such good condition BECAUSE it's only 180hp LOL.
I am a Factory-trained Bosch P7100 Dodge 5.9 technician and I believe that your lost performance is NOT a need for performance injectors....especially exotic ones....extrude hones, etc. If you want to keep power modest, then simply pull your old injectors and have them pop-tested at a shop that does that. You will most likely get told that they are well over 1000psi below acceptable pop pressure. Getting them rebuilt with new Bosch nozzles will restore the performance and the change in truck behavior will be very noticeable. Crisper throttle response, better torque, and better overall snap and grunt. Of course, there are performance options....for your truck I would recommend the new Bosch injector P/N 0-432-133-753 injectors. These are a 50hp drop-in replacement injector. They are made to work with an unmodified injection pump. These or the new stock injectors, coupled with a judicious amount of tweeking (read small adjustments in stages) of the boost aneroid of the pump to adjust the "when" the boost fuel comes in will go a huge long way to waking the truck up. Most Dodge owners, and a lot of the aftermarket guys out there truly don't understand exactly how diesel injection really works. It isn't just a matter of how many holes the nozzle has, nor is it a matter of how big the holes are....these are just parts of the whole picture. The biggest impact on injection efficiency is the sharpness of the edges of the exit holes of the nozzle. This is where atomization occurs. Even with bigger holes or more of them, as these "bigger" injectors have, most are going to be extrude hone nozzles...and that process erodes the sharp exit edges off the nozzle. While the holes get bigger, the edges go away, leaving you with a nozzle that has gobs of power at higher rpms, but has a tendency to smoke black or bluish off idle and when applying power at lower rpms. Other aftermarket injectors may have brand new manufactured nozzles of some other name brand or no name brand at all. Some are good, some okay, most, though, are junk. Their metallurgy is just not up to the par needed to live in the high temps and harsh environments of a diesel engine.
I would also recommend, if you haven't addressed it yet, take a serious look at your piston supply pump, fuel preheater, the elbow hose between them, and the grommet at the supply inlet into the preheater. These are the most overlooked areas that can adversely affect the 5.9's performance. I have read other posts how it is recommended to pull the preheater and clean/replace the screen. This is a waste of time. Most likely, the preheater is an original unit and you will find that the electrical pins going into the side of the preheater are seeping fuel. You won't see a leak since the weather gasket seals it pretty good. But air, being 1000 time smaller in molecule size, can easily slip in during suction...this aerates the diesel fuel making it "spongy" to the fuel injection pump. Fuel cannot be compressed, but air can...so part of your effective injection pump stroke is being used up just compressing the air bubbles until they equalize with the fuel pressure so that the injector can even open......this shows up as timing retarded in the truck's behavior.
John
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