Soaggydogg, you can go to jacobsbrake.com and it will give the information between the Jacobs engine (Compression) brake and an exhaust brake. In the 1950s, Jacobs/Cummins had a few trucking companies across the country test the engine compression brake. I used one of the test units for several months on a 1957 Peterbilt COE 3 axle semi tractor with a 262 Cummins engine. Over the years I have used the engine brake for over a million miles and a the "Blue Ox" brand exhaust brake for about a million miles. The Jacobs engine compression brake wins hands down. Qualifications? 46 years and over 4 million miles over the road trucking.Do you know what the difference is between the two?
Ya, it helps a bunch. I have the diy set up on my truck and I would say it gives around 15% more engine braking than just letting off the fuel. When I was in towing I had a Banks Exhaust brake on one of my little Cat's and it would give about 30% better than without one. Definitely saves the brakes.do the realy help wit slowing do when towing?