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Power Strokes
7.3 Aftermarket
Detuning large injector nozzles - How to pick injector size for upgrades!
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[QUOTE="Chatham036, post: 1399137, member: 13047"] Horsepower is actually a derivative of torque based off the same equation. A dynometer will measure torque then calculate the hp. Take this into consideration, how is the rate in which RPM climbs correlated into this? "By going to a larger nozzle, we inject faster, [B]so that we can raise our peak horsepower RPM?[/B] " I think the answer to what your asking is that as the engine RPM increases, the allowable limit for pulsewidth decreases. A larger nozzle injector will inject more fuel with a smaller PW window (caused by increased RPM). "But if you allowed the faster injector to inject even more fuel at a lower rpm, you would in fact make more torque and thus give you more horsepower at that rpm? ( This is assuming your turbo was designed to work at that specific RPM and give you an ample amount of air, or if you didnt care about EGT's)" I actually share this same theory with you which is why I often find myself recommending people to get a 238cc - 30% injector. It will allow for the full pulsewidth window to be utilized while still injecting a greater volume to produce power. The smaller nozzle will allow for greater atomozation when compared to an 80 - 100% nozzle. I am a believer that you want the smallest possible nozzle size to inject the desired amount of fuel. If you want 500 rwhp, you have to have around 238 - 250 cc of fuel injected. If that amount of fuel is able to be injected out of a 30% nozzle, you will notice greater atomozation causing the fuel used to run more efficiently than say a 100% nozzle. [/QUOTE]
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Detuning large injector nozzles - How to pick injector size for upgrades!
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