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  1. L

    So who has bumped the power on a 6CTA cummins

    It will definitely be way too hot. Just look at the 370 marines in a 12 valve. Truck would be hot all the time. Best bet is to take the stock injectors out and have them opened up to your specs. Most injector shops can hone the nozzle and increase flow.
  2. L

    So who has bumped the power on a 6CTA cummins

    If you have the part numbers off the marine injectors, a shop should be able to look up the specs. I personally feel 450hp will be way to much for an over the road motor in a 5 ton. It’s like adding a 100% over at injector to a stock truck. It’s going to be really hot.
  3. L

    So who has bumped the power on a 6CTA cummins

    I swapped a small hx50 onto my truck and it was too big. The power band on these trucks is small to begin with. Adding a larger turbo alone, will only hurt you. There needs to be additional modifications done to support more air and fuel. I suggest installing gauges and then adjusting your...
  4. L

    So who has bumped the power on a 6CTA cummins

    Also, on a separate note, I have adjusted 3 of the 4 you mentioned, pre-boost fuel, fuel rack and gov springs. If you open the fuel all the way, you will melt the motor. I have 3 threads showing on the rack and a couple turns out on the pre boost. Huge improvement and still usable power but...
  5. L

    So who has bumped the power on a 6CTA cummins

    Did you re prime the system? The MW pump can be a pain to prime if you drained a lot of fuel. Overflow/return line wont cause the truck to not start.
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