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Message: [QUOTE="TARM, post: 431177, member: 578"] A larger nozzle ( to a point) can allow you to run a much lower CP/tq level and yet still achieve the same peak HP as its spread across a much larger RPM band width. Compare that to a smaller injector which would need to do the same thing but because of its slower and lower total injection amount in a smaller RPM band width. That means it will need a higher TQ/CP level to achieve the same peak HP level. Below is an example for ref purposes only they are not real numbers: Goal 500 HP: 100% nozzles: Peak HP would be 2700 RPM Peak tq would be 2450 RPM HP forumla: (tq x rpm)/5252=HP (tq x 2450)/5252=500 hp Peak TQ = 1071 ftlb 200% Nozzles: Peak HP = 3300 rpm Peak TQ = 3000 rpm (tq x 3000)/5252=500 hp Peak TQ= 875 ftlb So by having a faster ie larger nozzle you can actually make lower CP/TQ to achieve the same power. It being spread out over more RPMs means that much less stress during normal driving. The down side is that the larger the nozzle the larger effect the same changes in a tune have on them. This means it takes more attention to detail to get the dialed in as it takes smaller adjustments to get things just right. 200% seem to be the balance point between atomization quality , vol per time, and tuners being able to get things setup to give good quality performance without numerous tweaks over and over to get it dialed in. You can get a decent base level with remote tunes and a few tweaks. To put it plainly at todays tuning levels and injector builds it seems to be the sweet spot. [/QUOTE]