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Message: [QUOTE="KCTurbos, post: 1438743, member: 13852"] 190 is the "internal capacity" of the injector (simplified version). That is how much fuel the injector holds 30 or 100 is the size of the nozzle over stock. This is going to determine how fast the fuel dumps. The problem with a larger nozzle is that it dumps fuel so fast down low that you lose atomization. You can only pull PW so far until you have to pull back on ICP. Smaller nozzles can run higher ICP at the same PW to dump the same amount of fuel, thus are more efficient. Think of a fine mist VS a leaky faucet. So down low it becomes hard to pull fuel and run efficiently. You will get higher egts, more smoke, and less power down low with a larger nozzle. Conversely a larger nozzle can dump the fuel faster on the top end and can run less PW which helps make more/safer power. For my personally daily driver. There is no contest. I would stick with a 30% nozzle. I have switched back and forth many times. Tried everyone tuning. VGT vs Non-vgt turbos. The 30% nozzle is my favorite mix between top end power, and bottom end performance (low smoke and egts). [/QUOTE]

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