Hot take: I don't think compression release brakes are worth the hassle on smaller rigs

I was reading through a forum debate last night and someone dropped a stat that surprised me: modern diesel engines with VGT turbos actually build enough back pressure that compression release brakes only add like 10% more stopping power on loads under 20k lbs. Found it in a thread on TruckersReport. For the cost of installation and maintenance, I'd rather just use the service brakes harder and save the $1,500. Am I missing something?

2 comments

2 Comments

dakotawells12d ago

That stat about only 10% more stopping power under 20k lbs is interesting, but I think it misses the real point of having a Jake brake on a smaller rig. The thing is, it's not just about total stopping power, it's about heat management and control over long grades. I've been in plenty of situations where dragging the service brakes down a 6% grade for miles just cooks them, and that's when you start losing stopping ability fast. Plus, the feel and control are way different. With a Jake you get that predictable, steady deceleration without the service brakes touching anything, which is huge for keeping your cool on a wet or icy road. Sure, maybe the raw numbers don't look huge, but those extra percentages come at the exact time you need them most, not just in a straight line from 60 to 0 on dry pavement. Cost is a factor for sure, but I'd argue the safety margin is worth the expense even on lighter loads.

quinn_nguyen12d ago

Jumped right on board with you on this. I've got a 26,000 GVWR straight truck with a Jake, and pulling the Grapevine in California with a full load is where it really shows its worth. Without the Jake, I'd have to ride the service brakes every few seconds to keep from gaining speed, and by the bottom of that grade you can smell the pads burning. That extra control and heat management is exactly why I wouldn't go back to a truck without one, even for the lighter loads I run.