Adam Metters spends the majority of his workweek sitting abaft the caster of his ’99 Dodge Ram 3500 dualie, towing abundant trailers over continued distances in the Pacific Northwest. A lot of the active takes him beyond several abundance ranges, area the truck’s benumbed 5.9L Cummins engine’s ability is put to the test. It’s never let him down.
However, the rig’s anemic articulation is its anchor system, which takes a assault already the barter crests the top of the abundance passes and begins the coast into the lowlands. Like abounding agent auto owners who tow full-time with trucks that don’t accept the affluence of computer-controlled “grade-braking” systems, Adam spends a lot of money on anchor jobs, but that ability be a affair of the past.
Hoping to advance his Dodge Ram’s endlessly power, Adam is accepting Springfield, Oregon–based Dunks Performance install BD Agent Performance’s accepted exhaust-brake kit. We’re there to see how it’s done.
Exhaust Braking 101 For those who are not accustomed with bankrupt brakes, the assumption is actual simple: Restrict the engine’s bankrupt breeze afterwards from the turbo back the burke is aerial so the added backpressure works adjoin the engine, slowing it down. It’s a abundant accessory braking arrangement for trucks that tow or booty abundant loads, and it functions by hydraulically aperture the bankrupt valves, absolution compression during the engine’s ability stroke. (They’re additionally accepted as Jacobsen “Jake” brakes, the accessories you apprehend acclimated in big rigs.)
An bankrupt anchor is aloof a valve in the bankrupt arrangement that partially closes back the burke is lifted. If the bankrupt is absolutely blocked off, some austere braking will happen. But, at the aforementioned time, the burden that builds upstream (which can ability 60 psi) will either backfire the bankrupt arrangement or do austere accident to the engine.
To ensure those types of issues don’t occur, bankrupt brakes like BD’s accepted accessory can be adapted to absolute backpressure so as to not beat the agent builder’s specifications: The Ability Achievement should not beat 40 psi, Cummins 60 psi, and Duramax 55 psi.
This is additionally why it’s analytical the engine’s valvesprings be of a college appraisement than the bankrupt brake’s backpressure setting. If the bankrupt valvesprings are too anemic to authority adjoin the backpressure, the valves can be affected accessible and possibly bang the pistons.
Simple Installation Installing BD’s Accepted Bankrupt vacuum-operated, remote-mount anchor kit is straightforward: The erfly-style actuator accumulation is army in the bankrupt amid the turbo and catalytic converter, with the activation about-face affiliated to the truck’s burke arrangement and a ascendancy about-face in the cab.
In our installation, we’re replacing the toggle-type about-face that’s included in the kit with an alternative ($69) push-pull about-face that mounts on the chiral transmission’s about-face lever. This places the bankrupt anchor system’s On/Off about-face in a area that’s far added driver-friendly than an out-of-reach dash-mounted switch.
The reverse-power advancement brings 150 bhp of braking ability to buck back the bankrupt anchor is activated, decidedly slowing the big dualie—and whatever it has in tow – afterwards Adam accepting to blow the anchor pedal. The added braking ability will additionally apathetic bottomward those anchor jobs that account downtime.
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