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Message: [QUOTE="CurtisF, post: 949204, member: 829"] Absolutely it does. For a quick visual, take a water hose and put one of those adjustable nozzles on it. Turn the nozzle for a different sized opening. As you make the opening smaller you get a finer mist, but less water. As you make the opening larger you get more water, but bigger droplets of water. Similar concept with injector nozzles. Now it's already been explained that you can move more fuel in less time with larger nozzles. This has several advantages as well as some disadvantages. The advantages are you get more fuel out quicker. Period. Hence you get more power in the upper RPM range where your injection window rapidly shrinks, and of course you have the ability to more readily "empty" larger CC injectors. So in essence you are capable of a much larger power increase. This shorter injection window also can be beneficial for daily driving and/or towing. The ability to get the same amount of fuel out in say half the time than much much smaller nozzles allows you to have more "useable" power. For instance, my truck ran stock injectors for years, but towing over a mountain pass in a race tune that made over 300 hp was virtually impossible. The injection window needed was just too long to move enough fuel through tiny nozzles. However with the 250/200's I'm running now, I can tow in tunes well north of 350 hp over those same mountain passes, and my EGT's barely crack 1100 degrees. Those are advantages. Now the disadvantages are that a bit of idle quality will be sacrificed, tuning adjustments get more complicated, and fuel economy can become a factor with tuning (along with smoke control, etc). There's a lot more fuel that can be moved in a much shorter amount of time, so getting the tuning right can be trickier for some trucks. This can have a big effect on how the truck idles, the fuel economy you will see, and even how much smoke you'll roll. On my truck the fuel economy remained almost unchanged. Smoke is very little (passes emissions tests with flying colors). However there is a distinct idle difference than stock split shots, or even smaller singles. That's something I've never been able to tune completely out. Probably my own fault. So take into consideration what you get as advantages vs. disadvantages. And of course the obvious is that there is a greater risk of losing it all with larger sticks/nozzles. Tuning will have a lot to say about that, and a small adjustment can make a huge difference. That depends on you and your tuner. What you plan to use your truck for and what your tuner is comfortable dialing in quickly will overall lead to your happiness..... or unhappiness with the setup. Most would consider my setup to be completely unfit.... 250/200's on a daily driven (and daily towing) PMR motor. Well, it's been nearly 3 years exactly, and I still think it's the best setup out there. Will everyone think the same if they duplicated what I did? Probably not. Smaller nozzles are generally easier to tune, so most likely with smaller nozzles you'll have a great running truck on the first one or two tries. Start going with bigger nozzles, and you might need 5, 10, 20 or so tuning reburns to get everything dialed in to where you are happy. In the end, and with enough patience, you can have just about any nozzle size "work" just fine. Personally I think that 200% is on the edge for reliable streetability. Some have gone bigger with great success. Pick your poison. [/QUOTE]