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Message: [QUOTE="TooMuch03, post: 583239, member: 5993"] I agree. The tuning will have a big role in making the truck perform at its best. I am not disagreeing with the fact that larger nozzles on the same sized bodies will make more power. My point is that that power increase is not seen until beyond say 3500 rpm (just throwing a number out there), so for this DD, tow truck build, there will be no benefit, IMO, to upgrading nozzles, other than to replace worn out stock nozzles. Like you said in this post. The big variable will be if the air is there for complete combustion of the fuel. If the truck has a stock turbo, the longer pulse width required with stock nozzles may be beneficial to allow more air to contact the fuel meaning more complete combustion, also in theory. Of course, the smaller nozzle will mean a compromise in high rpm power, due to the limited pulsewidth, but since we are only talking about 155s, it shouldn't be a huge difference. [/QUOTE]

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