Hi, I am going on a 15,000 + mile road trip from Washington to Panama with my 83 Subaru 4X4 wagon. The car will be loaded with about 1100lbs-1300lbs+ including passengers. On a trip last summer to the Yukon I went through 4 tires due to my front wheels being too strongly +cambered since the rear was squatting with cargo weight leaving the car high in the front. Since then I cranked the rear torsion bar all the way up and installed 195/85/14 tires on Peugot rims- thanks ferox - in place of the 185/75/13 stock tires & wheels.
Unloaded the rear suspension looks good and the tires appear to have adequate clearance but when we loaded it with our approximate weight the rear loses 3.25" and lacks adequate fender clearance. Now we are looking into mounting coil overs from an ea82 that I picked up from a a wrecking yard. I saw someone on the forum mention they would add about 2" of lift with an intact torsion bar and mounted at the stock ea81 upper mounting height. This sounds like it will be about right with the load we are carrying. Does anyone have any other ideas to make the rear suspension stiffer? What about clocking the torsion bar in addition to leaving the adjuster all the way up? any thoughts on the coil over solution? or adjusting the camber?
The 2 goals I have are to maintain proper camber so I don't go through tires quickly and maintain sufficient fender clearance. I'm basically looking to control camber by maintaining proper ride height and attitude (slightly nose down).
Thanks
Jon
Below I have more details for those who care to read.
Unloaded i measured my front camber as +1.3 degrees drivers side and +1.5degrees passenger. In order to measure camber I used a T square that spans my wheels from edge to edge then i used a level that starts at the top of the wheel (held against the t-square) and at the bottom reads the distance out the side of the T square. Flat against the vertical part of the T- square would be zero degrees. I use the horizontal distance out the T-square with the vertical length so I have the opposite and adjacent sides of a right triangle then I take the inverse tangent of this to calculate my angle. We had to brush up on our trig to do this! The rear camber unloaded was +1degree drivers side and -.5degrees passenger side.
Next I loaded the approximate amount of weight we think we'll be carrying- 150#s on roof, 450#s behind the rear seat and 650 in the passenger compartment. The front wheels lost about 1/2" in clearance and the rears lost 3.25"! This is with the torsion bar cranked all the way up. Without moving the car I remeasured the front camber as +1.5degrees drivers and +1degree passenger. Rears were -1degree drivers and -.5degrees passenger. The roof of the car went from down-sloping .75" over 24" (slightly nose down) when unloaded to level when loaded. I wish I would have taken all these measurements before I adjusted the torsion bar! The change in the front camber doesn't seem that intuitive to me- perhaps i needed to drive it a bit with that weight or bounce the bumpers more for it to settle.
I read that up to 3 degrees positive camber in the fronts is within spec for an EA81 according to chazmataz
That seems like a lot to me as 1.5degrees is noticeable and I don't think i had a lot more than that on my trip that wore out tires.
In the manual (page 346) it shows there is about an inch of adjustment with the torsion bar so i should be able to fine tune the ride height with it.
I read this for ea82's rear toe and camber adjustment. Is there anything that can be done on an ea81?