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Cummins 8.3 Hot rodding info

nevrenufhp

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Sacramento
I'm making a condensed version of the other thread that has 50+ pages to sift thru.

First is the fuel rate nuts(some just have one nut).
https://www.youtube.com/watch?v=e3InnotLRAE

Then, we have the quick adjustment of the low rpm/excess fuel screw. It essentially starts to bypass the AFC(aneroid). The glitch on that, is that you will return to stock fuel settings if you let off the pedal at all.
https://youtu.be/C2pJZbYuVHs


Then, the gov springs can be tightened 2 to 3 clicks each for 2 to 300 more rpm than stock:
https://youtu.be/HlWbNdLOE_A

Another option is to get the Pacbrake gov spring kit # HP10029 for a Dodge, which lets it rev to around 2800:
https://www.youtube.com/watch?v=5L6X3jj8lBM
Plus, HD valve springs for those of you that like spinning to 3500rpm.
https://puredieselpower.com/class-8...duty-valve-spring-4936076.html#/product/15347

One more tid bit before we get to the next item; Your stock turbo will barely keep the EGT down with the above mods. Seriously consider an upgrade, at least to the compressor side.

Although, the trans wont last too long, you can also add 480hp marine injectors (makes about 350hp in these trucks). It will require a bigger turbo, or compounds, plus an intercooler.

Lastly, there's some work going on with adding an intercooler to keep the EGT down, but I dont have any part numbers, or applications.

There's another thread about the timing, which I could add here to keep it all together.
 
Last edited:

Bigchevy383

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baton rouge, la
Do you have the how to on the timing adjustment? The marine injectors, what engine are they for so i can look up the part number?
The second video is that just for smoke/ overfueling? You say it will return to stock if you let off the pedal, if so is there any point to this adjustment?
 
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