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On a more modern vehicle, sure, replace the brakes more often. Coming down STEEP hills with sharp switchbacks, I will take any auxillary braking I can. I doubt any of us will truly use the lifespan of these engines, so I think shortening it by however much is a fairly moot point. Biggest thing...

Have a simple micro switch on the throttle pedal. Have it ONLY activate when there is NO throttle pressure. This is the way they are set, and one of the best ways for them to work. Have a switch that turns the entire system on/off. So it isn't always running the brake when you don't need it...

That works in a single cylinder engine with no crankcase vent. You ever pull the PVC valve and see how it PUFFS the air out? One for each cylinder like you are describing. Two things are different from your scenaro though, the PVC allows vacuum to pull out pressure from the crankcase. And for...

That is a fairly true statement. Problem is, the exhaust valve lets air back into the cylinder, thus starting the entire vacuum pump affect again. Then when the intake valve opens in it's next cycle, it (having approx 24" vacuum in the intake,) will equalize with the current volume of air in the...

Yeah, but vacuum is lost once the exhaust valve opens. I can see where you are working with a vacuum pump where you would maintain the vacuum in the cylinder for each cycle of the piston. But this doesn't apply when the exhaust valve opens and lets pressure back into the cylinder. Once the...

That works until you figure in the valves opening and closing.

I just remember looking up the kit for our trucks, and it showed 25 lbs. I know that this number is almost always based on the the closed spring pressure on the exhaust valves. This was one of the reasons I wasn't in TOO big of a hurry to run an exhaust brake. Any brake would be good, but at...

I thought we would be limited to #25 of back pressure by our exhaust springs?