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!

Jul 13, 2013 · My setup has 4bt/nv4500/4.10 gears 33 inch tall mud grip bf Goodrich tires. Next week I am regearing to 3,73 gears and I am hoping for a 26 mpg average after this upgrade.

Jan 3, 2007 · FAQ: Commonly Asked Questions, 4BT Files, Photos, Links, Etc.... original post by fly71h on Yahoo 4BT site; "The primary difference between an on road and off road engine is the function of …

Jul 27, 2016 · 4BT production years Jump to Latest 9.5K views 8 replies 6 participants last post by char1355 Jul 29, 2016 Ram Man 02 Discussion starter

Sep 1, 2011 · Thanks to a good Chevy gearhead parts guy's advice I removed the guts from a stock Chevy hi output alternator and stuffed them in my 4bt alternator case & clocked it to match, works …

Jan 19, 2020 · The 4bt does not come out of the Cummins factory with a bellhousing. The adapter plate, flywheel, clutch, bellhousing, transmission, started and required fasteners are mostly unique to each …

Jul 21, 2022 · The Cummins 4bt units were OK but there have been major improvements over the years, Have to remember that design is over 30 years old. The one used in the Ford diesel pickups is vastly …

Feb 10, 2010 · The 4BT can also be found in Case Backhoes,stationary pumps, generators, and is an option engine when buying some brands of tele-handlers (extending forklift). I know of a few 4BT`s …

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 …

Aug 23, 2007 · My old 4BT had the pump advance, fuel increased and the exhaust smoke particulates permanently tarnished the white letters on my new tires.@!#$%^^&&! I back off fuel and reset timing, …