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Message: [QUOTE="Tim @ P.I.S., post: 1062082, member: 744"] Start with this statement right here. Simplified version, at 1 rpm you have a huge window to inject fuel. At say 3000 rpm a much, much smaller window to inject fuel. This is how you spec an injector. Find what you want to do with your truck. Example #1 - Heavy Tow. Spend majority of your time at lower RPM band? select a 30% nozzle because it [B]CAN[/B] move a good amount of fuel, yet make for a nice clean burn. 160cc of fuel can easily make in the mid-high 300HP. Perfect for towing and maintaining nice cool EGT's. Example #2 - sled pulling. Spend majority of your time at higher RPM band? select 400% nozzle because it [B]WILL[/B] move a lot of fuel, nothing else matters. 300cc of fuel can easily make in anywhere from 650-850HP depending upon the setup. Anything more that much over 300cc will not inject within the RPM band a lot of pullers are trying to be in. That takes you back to the whole theory of why have 1000cc injector if you can only inject 100cc. Now you have to also throw into this equation that you really have a set of injectors that REALLY do inject what they claim in a realistic usable time frame. And then you have to have a tune that is capable of making use of the fuel that is available. [/QUOTE]

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