Originally posted by RottenRalph:
I use a RM9700 "box" brake which I'm not crazy about. Other than the "box" brake systems, what choices are there for a gas motor motor home?
RR, I am using the SMI Stay-in-Play DUO which I bought from RVUpgrades.com. The DUO is ideally suited for use on gas powered motorhomes. SMI is a family business and they sponsor this forum.
The SMI DUO control head is installed under my hood and is out of sight and out of mind. The G-Force controller is mounted on the left side kick panel and I just leave the disconnect switch to "ON".
The system is ready when you plug in the umbilical cable into the back of the motorhome from your toad. The DUO is armed and ready to apply the brakes when you close the circuit as you step on the brake pedal. If you let off the brake the DUO will release the brakes immediately unlike box units.
The G-Force controller is proportional. The more inertia you generate the harder the brake pedal gets pushed. Now here's the best part. The DUO generates vacuum in the booster and the vacuum's exhaust is directed toward the brake application cylinder as pressure. The magic of this system is the cylinder and the manner in which it is attached to the firewall. See the picture in the graphic at the top of the page. Applying brakes naturally under pressure like a person normally would do with their foot, is done under vacuum in the booster - power brakes. The DUO uses the power brake feature of the car so the brakes are applies as they should be.
Unlike a US Gear the SMI only uses a 5 to 6 inch cable and no 90 degree transition to a unit under the seat.
The DUO is user installable, I did it! Check out the article I wrote: 2008 Saturn Vue XE - SMI Stay-In-Play DUO Installation