|Laser Alignment of Wheels Showing Camber|
I ordered and now have received some sealed rather than shielded replacements but I am not sure that the problem is only caused by the loss of grease, I am sure they are overloaded as well. The bearings I am using at the moment are 696ZZ which are 6x15x5mm and have a static load rating of 655N. Unfortunately, I can’t increase the bearing size easily without a re-design, so I am stuck with them for the time being. The only interim solution could be to double up the same bearings within a modified housing.
From the excellent “The World’s Most Fuel Efficient Vehicle” (PACII) book.
The other advantage of eliminating the camber will be that the UJs are running concentrically when Quattro is going straight, which should reduce friction losses considerably.
Thinking positive, this could save me up to 20W in my tyre rolling resistance power at 35mph as well as reducing the side loads and therefore the friction in the wheel bearings. The power saving in the UJs is difficult to quantify but the angular speed variation I mentioned in an earlier blog should be minimised.