GONEWALKABOUT wrote:Welcome mate, firstly; lag on stock turbo? pardon! is this vehicle of yours an auto or manual?
Manuals came with the VF46 which has been engineered for minimal lag.
All post-FL (MY07-MY09) GTs/GT Spec.Bs/TbSTIs came with the VF46, regardless of gearbox. The auto actually helps to "hide" the lag a bit if anything.
A tune will help reduce lag, as well as replacing the air intake path and removing the restrictive stock downpipe. E85 will improve it further if that's something you're interested in.
Matt/Kido_Tune does remote tuning, but obviously can't help you to do the mechanical work. Changing intake/downpipe IS possibly DIY, though not necessarily easy.
One issue you get with getting off the line with an AWD car is that you need more revs, otherwise the engine bogs down due to sudden introduction of load. In a FWD car, you much more easily get wheelspin - and controlled wheelspin can actually help you get off the line (as it stops the engine bogging down - once it starts, you moderate it with clutch and throttle). Once you get an AWD launch right though, you'll do a LOT better, because the grip you get from an AWD drivetrain.
And yes. Off boost, the Liberty is a largish, heavyish car (mine was weighed at 1608kgs with me onboard at SMSP last October, the auto is a bit heavier than the manual, though I had also removed the spare wheel for the track day), and thus doesn't exactly go hard - that's compounded by the relatively low static compression (8:1 if memory serves) of the turbo engine vs the NA engines. It's one reason that Subaru went to the 2.5L turbo engine instead of the 2.0L, as (in theory), the 2.5L has more off-boost torque.