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Captain, We Need More Power!

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How much power can I get out of my 4 valve E6? It is a fuel squeezing 300 now. Im thinking about bigger injectors, turbo, and pump. And possibly a twin turbo set up after I get my other truck worthy enough to be driven by me, lol. But that's later on down the road. If I was to put the biggest turbo i can find on it now as a 300 hp, would it work, or do I have to work the pump and injectors to do so?

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How much power can I get out of my 4 valve E6? It is a fuel squeezing 300 now. Im thinking about bigger injectors, turbo, and pump. And possibly a twin turbo set up after I get my other truck worthy enough to be driven by me, lol. But that's later on down the road. If I was to put the biggest turbo i can find on it now as a 300 hp, would it work, or do I have to work the pump and injectors to do so?

Do not set fuel any more than a 350 HP because you will burn pistons and can spin brgs in bottom end.The bottom is weak when you start making too much power.I know you are going to get a lot of advice on more fuel but I started working on macks in 1965 and I have seen a lot of engines spin brgs because too much power ortoo much virbrations.The extra power is not worth it.Leve it set to specs and you can stay in it all day and not hurt it. Glenn Akers

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thanks for the advie Glenn, but I pull 84,000lbs plus and the 300 is not cutting it. I am not going to mess with the fuel delivery system myself. When and if i do, i will take it to a diesel injecton shop ( the mack dealer) But what about my turbo question?

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One at a time yall, lol. Does anyone know? I want to put a big turbo on it without messing with the injectors or the pump. Will it work? Has anyone done it successfully?

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I have tinkered with my pump to flow a little more fuel. I noticed that the EGTs rise to 1000 fairly quick now. Thats ok because Im just bob tailing to shows and stuff. I dont think I could pull a long hill loaded as the EGTs will get to high. It is fun for bob tailing around and my Butt dyno tells me HP is up.

From what I have learned from others is that If you want to properly get more HP you need more air when you add more fuel. Most newer high HP diesels are running hi boost to keep EGTs down and keep emissions in check. higher Boost will burn the extra fuel and keep EGTs down. the intercooler should be able to keep up for most adjustments but be carefull. Injector size may become a issue depending on the powere you want.

my advice is to get a cheep, used slightly larger turbo and up the fuel flow a little. Then see where the EGTs settle on a pull. The extra boost from a larger turbo should be able to burn the extra fuel added and the injectors may be fine for the powere.

As you know many of us dont have a dyno to prove our results and none of us will tell you its 100% safe.

just be smart, make little adjustments AND WATCH YOUR GUAGES

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