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Message: [QUOTE="BS Hauler, post: 1507219, member: 15204"] Looking at putting in 238/80's into my truck. Why would a person choose the tip size from one to the other. Lets say from a 30 to a 80 or a 100 in this size of injector. Pulling a horse trailer with a 6spd and 4:11 gears with 235/85-16 tires. I have done all the mods up to just doing the injectors left. In Iowa we are pretty flat and only run 55 on our county blacktops. But when we travel we go thru South Dakota and Wyoming and the speed limit is 80. What I am looking for is what is the thought process of why one size fits in a usage better than another size. I understand that the smaller size helps with lower rpm's but where does it start to fall on its face in higher rpm's. My thought is at higher rpm's that the injector can't keep up with trying to empty and your just pushing fuel in too late in the power stroke and not getting full fuel efficiency. Also if you are running a 175/80 single shot with the 7 to 1 ratio vs 238/80 with 5 to 1 how much quicker will the 7 to 1 be able to empty the injector. Will the 238 have to run 100 tip to be the same. Just looking for some guidance before I order my injectors. This is just a tow rig that lives on the trailer. I have full 4" turbo back, New 38r, new Adrenalin. Heat rapped up pipes. New fuel system. 8 gauges. After having a new diesel just want this one to run like the new one. It only has 130,000 miles on it and I bought it brand new. 02CCLB 4x6 6spd. It is never leaving so just want to have fun with it. [/QUOTE]

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