Originally Posted by Cbfreq
The trailer weighs less than 7000 pounds and the Tongue weight is less than 600 pounds.I got that from a worksheet that the former owner had filled out but I did not see the weight scale ticket.I was under the impression that the older airstreams weigh less than the newer airstreams.My employer from when I was driving truck has scales so I was going to go there and check it out soon.He will not charge me a penny and I can take my time and get all the measurements I want.I am a little concerned about the short wheelbase of the TV and the long 31 foot trailer giving me problems with sway.Is it just the Porsche or does the tourag have an anti-lock brake/ stability system that senses Sway and applies the brakes on the outside wheel of the TV to counteract it? Either way I was thinking about using two friction sway control units.On an unrelated issue I have a trailer interface module but I cannot seem to find the harness that goes from the trailer interface module back to the towbar for a reasonable price, VW wants $450. Thank you to both of the posters that replied I appreciate your input.
I went thru retrofitting a tow package on a Cayenne. It will be similar (electronically) on a Tourag. The parts are not cheap and the system runs thru the Can/BUS system. So the electronic brake controller plugs in by the driver and has to get wired to get the brake signal and also to send the correct signal to the 7 pin.... I believe all that is controlled thru the can/bus system.
Your other option is to bypass the can/bus all together and route the wiring all back to the rear lights and hardwire the 7pin connector and bypass the can/bus.
Regarding the sway. I believe the concern is that the trailer has sway. The cayenne or Tourag stability control system controls the stability of the TV. The force diagram of a trailer swaying is coupled to the TV thru a pin joint (the hitch),and the forces are in the cross-road direction. That force is a coupling of momentum (M*V). The short wheel base and contact patch area of the TV tires are not desirable to control sway of a trailer. Having sufficient tongue weight (10-15%) is necessary to move the center of mass forward on the trailer itself to shorten the effective moment arm of forces to induce the sway.
In my opinion that is the real safety question of pulling a large trailer... I believe that the Cayenne or Tourage has the ability to pull sub 7000 pounds and since the trailer has brakes, it is probably safe at braking that trailer in may conditions, but the limitation will be having sufficient tongue weight vs. gross trailer vehicle weight.
So if a Tourage has a 750LB tongue weight limit (if you read the threads, this is correlated back to axel weight limits... pending some assumptions about cargo in the TV)... then a gross vehicle weight for 15% is 5000lb and 7500lb for 10%.
I have never tried it, but Hayes does make a dynamic brake sway controller to control the trailer brakes if it senses sway on the trailer. It connects in-line between the ECB and the trailer brakes. This may be a better option because it applies a force at the trailer wheels where you have the best chance of creating an opposing torque (perpendicular distance * force) to counteract the forces creating the sway. I think the cost is around $350