Subaru Legacy 3.0R engine mapping

[arcbeer]

I've read a few reports about the new Legacy 3.0R, describing more low-down torque being available. I assume this is an engine mapping as it is the same engine as in the previous model. Does anyone know anything about this?

[vixpy1]

I know someone who would know, hopefully i will be speaking to them later today, so will ask.

[arcbeer]

Cheers

[vixpy1]

Spoken to him, he does'nt know, but will ask around...

[Graykiraa]

i would be very interested in this as well

currently searching for one - but it seems the budget may mean i get the previous model rather than the 07 one.

[Fungus_bogeyman]

See if you can get a graph for the 04 2.5l model, as that one had the most low down torque of all the ones I test drove (2006 2.0l, 2004 2.5l, 2006 3.0l). Seemed to equate on paper too - dunno if it helps though.

[arcbeer]

Comment at the bottom of this page talks the torque

[arcbeer]

Had the following reply from Iain of Lichfield Imports (thanks Iain):

"The standard settings are hard to beat and any improvement on the 2007 model will be with revised hardware."

Now I wonder how much a turbo mod would be...............

[martinbo]

I have extensive experience with the Legacy 3.0R at a particular test facility outside of Pretoria. Plenty of test track work behind the wheel of one so I know the 3.0R very well.

What I can tell you is that the engine remap does not boost low rpm torque perceptibly...

Bear in mind that the facility is at around 1600m above sea level which blunts the low-down response of the 3.0R. But there's a particular rising right hander hairpin that:

a) either shows the driver exactly how he botched the corner or
b) highlights a car's lack of low down grunt.

Get the corner hooked up just right and you'll be just a touch off 4000 rpm and accelerating, at a fraction over 4000 there's noticeable uptake in the engine delivery as the more aggressive cam profile kicks in. It's not Honda v-tec prevalent but it is there.

This step in the power delivery is present in both pre-facelit and facelift versions. As I currently understand it, this is down purely to the mechanical configuration of the engine which has not changed between the aforementioned versions. I am of the impression that the engine remap has more to do with the introduction of SI-Drive than to bring about a marked improvement in torque delivery from below 4000 rpm. The short stroke Boxer six is mechanically constrained in producing low down torque output and there's not much getting away from that.

[arcbeer]

Interesting I have noticed a definite pick up around 3K revs, it then pulls like a train up to 7K although showing a little mechanical sympathy (as well as to my wallet with petrol usage) I generally change up before then.

As I understand it the Legacy layout is very similar to Porsche (but with the engine at the correct end ) so maybe some mod lessons could be learned from there? I think I'll put any mods on the back burner for the moment as it's plenty quick enough, for the time being..

[martinbo]

Absolutely. At sea-level the 3.0R is just fabulous. Maybe not 330i quick but dynamically a very rewarding experience. And the engine note has a charisma all of its own. I wouldn't mind hearing a freer-flowing exhaust mind you...