I feel like doing a bit of a Disco and writting an essay on why i'm doing what i'm doing. Needless to say i've been thinking about how i could build the best off-roading subaru for about 2 years now. I went about my L series totally arse about and learnt alot from that experience. To me the best offroading subaru is still a car (daily driver) and i want to it drive like a car on road, off-road i want it to go where i point it. What i see is a some people trying to turn their Subaru into what it isn't, a jacked up 4WD. It ain't, and with independant front and rear suspension it will be shit if you do. Height for a solid axle 4WD generally means more articulation (longer softer springs), for a Subaru it means less (hard springs compress less = less travel!). Suspension lift/strut for a Subaru means more under diff and engine clearance, exactly what you already have in spades with independant suspension. Park you car next to a 4WD with 33's and compare your diff clearance, you'll probably have more and you only have maybe 27" tyres. You'll never have enough height to clear everything anyway, so why not just settle for factory suspension geometry and protect your under carriage? You need to protect it anyway.
Two wheels in hanging in the air is what stops our cars in VIC. Either from lack of suspension travel and two diagonally opposing wheels in the air, or bottoming out e.g when going through ruts.
Accepting the fact that your underbody/drivetrain will never clear every obstacle or rut (because it won't), the next issue is loss of traction when you do. It will never have the articulation to keep them on the ground either. So we get to the Subarus achilles heal off road,
OPEN DIFFS, not clearance. I have experienced my car offroad for 18 months now and i'm telling you, what stops it is loss of traction because of open diffs. Watching others i know what stops them is loss of traction because of open diffs. Not lack of low range. No low range just stopped me front getting going again half way up a hill, AFTER i lose traction. Subaruby in his MY gets over things our group doesn't because of his rear locker, simple. It doesn't have the biggest tyres (26"), the biggest lift/drivetrain clearance (2" body lift and factory suspension height) or even the best suspension travel (torsion bar rear end!), yet its the most capable car in our group by far! The EA81 handles everything, even towing my Liberty up a great big f-n hill. It all comes down to that locker and good gearing.
So lets sum it up. A Subarus biggest downfall is open diffs, ignoring articulation/entry/departure/body clearance because you accept all of that as shithouse when you take a road car offroad. Besides, i've never hit my front or rear bar so its obviously good enough as it is. Most people go for HD springs. What does that do? reduce travel. What does reduced travel do? Lift wheels off the group MORE. What does that do? Stop your car MORE because of those shit open diffs.
Hence my approach, accept the fact that 1 - you'll never clear everything and 2 - you'll always lift two wheels at some point. So first thing is to preserve what little suspension travel I have, limiting how often i lift those diagonally opposing wheels. Body lift for factory suspension height and travel, and some body clearance. As Disco says your can't beat factory engineered suspension geometry. Extra underbody and drivetrain clearance from bigger tyres, because its clearance without compromising suspension travel. So i've just gained body and drivetrain clearance and kept my factory suspension travel.
Next step is addressing those pesky open diffs. My car has had a vicous rear LSD since i bought it. It may as well not be there. Its useless. An air rear locker is a pipe dream, and the detroit may as well not exist it is so rare. Next best thing that is readily available at a decent price is a clutch pack LSD. Thats the rear sorted. Geared helical/torsens exist but they're more pricey, maybe good if you don't want the maintenance of the clutch pack.
Subaru's centre viscous isn't ideal for off-road and it wears out and costs a fortune to replace. DCCD is definitely better and easy to obtain. i went with the vacuum diff lock because i already owned it. Plus having the open centre diff on road will hopefully reduce the wear on my clutch pack rear.
Next is the front diff. Not much choice here. Clutch pack fronts aren't cheap, and there's the problem of maintaining them. Definitely not as easy to access as the rear one. Geared front LSD is relatively cheap new (OBX ripoff was anyway) and its maintenance free. ProbablyMaybe not as good as the clutch one (time will tell), but with the centre locked and the rear clutch pack working its shouldn't have to do a whole lot.
Now it's time to think about gearing. I've taken my car to 95% of the places all of you guys do and all without low range. Albeit a bit faster than i want to sometimes, but my point is we don't need rediculous rock crawl speeds for what we do. L series low range addresses that problem to the best possible extent without going custom low range or some sort of external transfer case. I've gone 3.7 and improved my gearing on road (for my particular car) and with L series low range i've significantly improved my crawl speed at the same time. That's just catered perfectly to the on-road/off-road compromise of this vehicle.
Tyres. The best tyres in the world will not do a whole lot for you if they spin in the air every time you lift two wheels. Again, from my observations and experience it is not the tyres that let people down its those open diffs. A good set of ATs fit that on road/off road comprimise perfectly. How often have tyres let you down when you've got all 4 wheels making contact with the ground? Very rare. Subaruby uses HT's and it doesn't stop that car.
Now i'm not having a go at people who put in strut lifts or HD springs, and please don't take offense. I don't mean it to anyone in particular and its certainly not personal. Each to their own and if that suits your particular situation then by all means go for it. if i was Pedro with a turbo XT and airbags i'd do exactly what he's done with 1" strut lift and HD springs. I don't carry much weight, so i don't need HD springs for that. Especially take into account we don't have sand in VIC, to me strut/suspension lift is a sound way to go if you do alot of sand driving. In VIC the thing that stops our cars most often is two wheels hanging in the air.
What i am saying is i've put a huge amount of thought into the best setup for my particular car and what i use it for, and i'm confident in the past few days i've basically achieved that setup. I didn't by a H6 Gen2 without airbags to build my dream offroader by accident. Fair enough 3.7 wasn't planned initially, but from my point of view worked out better in the end. Enough talk from me, time to let my car do the talking from this point on

:mrgreen: