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Category Archives: Cummins 4BT Information

Outer Limits: How Much Horsepower Can You Make With The 4BT Cummins?

By Featured Writer: Mike McGlothlin Thanks to sharing much of its mechanical makeup and even some of the exact same hard-parts with its big brother, the 6BT, the 4BT Cummins can support a substantial amount of horsepower. Exactly how much remains to be seen, as specific parts combinations vary from application to application. However, we…
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How (and Why) the 4BT Cummins Is So Popular

By Featured Writer: Mike McGlothlin If it fits, it ships—but if it outperforms, outruns, and outlasts everything else at the same time then it’s probably worth having. We’re referring to the 4BT Cummins, of course. With its packageable dimensions, abundance of low-rpm torque, overland-friendly fuel efficiency, and decades-long durability it’s become a household name in…
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Latest 4BT and 6BT Build Cycle

What a great end to the week here at Big Bear Engine Company. We just finished up a build cycle of 18x 4BT (3.9 L) and 6BT (5.9 L) Engines. Take a look at a few pictures of the finished product before final packaging.
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