Originally Posted by HipToBeSquare
Mostly agree with Raszaron's sentiments above.Small airbags as variable ride height helper springs would be great, but maybe a bit much for most people. Similar in theory to some sports cars that have lifters to raise them above driveway approaches or speed bumps, but instead used to lift from a moderate ride height starting point. Starting point could be slightly lower than stock forester, but slightly higher than WRX STI, with fully collapsed airbags. Partially inflated airbags would gain most of the additional ground clearance, and reduce the effective spring rate for off-road... fully inflated would give maximum ride height, and re-firm the spring rate. Good diffs throughout, variable damping rates, dis-engaging anti-roll bars, and variable ride height would probably make it one of the best cross-terrain performance vehicles on the market, to be calibrated for firm on-road performance and stability, or configured for good suspension articulation for off-road. Not a rock crawler, but better than most CUVs off road... and much sportier on pavement than the likes of stiff-legged solid axle Jeep Wrangler.
Subaru used these air bladders for adjustable-height suspensions in some early '90s Legacy wagons.
(Gotta be careful about buying 'em in a used Subie, though, as they tend to develop leaks over time, and ya can't really get those parts anymore.)