A forum community dedicated to Cummins 4BT Diesel owners and enthusiasts. Come join the discussion about performance, modifications, troubleshooting, engine swaps, transfer cases, and more!

Jan 27, 2026 · In tearing down a 2005 era Dong Feng Cummins 4BT from a bread truck, which from service records has less than 30,000 mi on it, I think I have discovered the reason why it was parked. …

Oct 22, 2007 · I called it 4bt Durango #2 because of the other Durango project. For those who haven't seen my other posts, here are the details: 4bt from a Chevy bread truck, which I haven't seen (should …

Apr 10, 2022 · The 4bt with stock injectors and an HX30W can do about 225 HP. Gets a bit iffy trying to get much higher with a single turbo. Which size HX30W do you have? There were 4 sizes used on …

Jul 1, 2013 · Even a 150hp mild 4bt will "feel" faster than a 300hp 350 in that boat because the diesel has so much more torque at lower rpms. Theres a guy on here that recently posted a thread (in …

Oct 13, 2021 · Hi, I have a 4bt I am overhauling and planning to produce 400 or more hp with it. I will list all the scopes of my engine below and what I currently have. I am needing help on deciding on a few …

Dec 17, 2013 · I bought a core 4bt that was taken apart so the previous owner could rebuild it. He lost interest and sold it to me and I had it rebuilt. My question is how to time the pump. I found out how to …

Oct 24, 2007 · If it is cheaper to do a 6bt, why is everyone doing a 4bt? it would be fore a jeep wrangler for me, so what would be easier/chaper a 4 or 6 cylinder? Also, what would get better mpg? Thanks,

Oct 21, 2019 · Most everyone here knows you can use the Dodge accessory drive on the 4BT and have available parts every where. I just discovered that you can use the Dodge accessory drive with the …

Dec 24, 2008 · I am curious as to what my options are for a tranny for my 4bt swap. I want it to be able to handle the power of a souped up 4bt motor, and I would prefer a manual trans with the availability …