2001 Legacy B4 Questions

[Mike Saint]

Hi all

I've just bought a Japanese Import 2001 Subaru Legacy B4 two litre twin
turbo here in New Zealand. It's a metalic sandstone colour and is
completely stock.

I have a few questions....

1. Should I run premium fuel or will the engine management system detect
lower octane and adjust accordingly?
2. Do many people run knock detection systems? I've had turbo MX-5's that
use a Link board and knock sensor and cut timing if needed.
3. It has 6,000km on the clock and I'd like to switch to fully synthetic
oil. Any advice/problems doing this?
4. Is there a good website or forum that has info about the B4?
5. Any Kiwi owners here?

Thanks
Mike.

 

[Terry Hollis]

I've just bought a Japanese Import 2001 Subaru Legacy B4 two litre
twin turbo here in New Zealand. It's a metalic sandstone colour and
is completely stock.

I have a few questions....

1. Should I run premium fuel or will the engine management system
detect lower octane and adjust accordingly?

It will have a knock sensor which will retard the ignition for low-octane
fuels, but for long term use you should use better fuel for the turbos and
fuel injectors, I use Mobil Synergy 8000 or BP Ultimate, both are 98 octane
and have special additives for your type of engine.

2. Do many people run knock detection systems? I've had turbo
MX-5's that use a Link board and knock sensor and cut timing if
needed.
3. It has 6,000km on the clock and I'd like to switch to fully
synthetic oil. Any advice/problems doing this?

I use Mobil 1, and have 150,000 km with no problems.

4. Is there a good website or forum that has info about the B4?
5. Any Kiwi owners here?

I have a Mitsubishi Galant Sports GT which is also twin turbo etc.

 

[Tony Burns]

98 Octane is the only fuel you should use.

Use Goggle and search "Subaru B4"

This NG is dominated by the folks in the USA and as result they have no
experience with B4's.

Hope you enjoy the car, my son has one, I'm looking at the new Liberty 180kw's
and 310nm at 2400 rpm.

check this out
http://subaru.com.au/explore/liberty/specifications.asp?item=23246

 

[Ryan]

I'm a Kiwi owner of a 97 B4, a pleasure to drive, I love it, Only down
points are the dreaded turbo-lag between turbo's and only getting 420K per
tank of gas.

Ryan

 

[CK@@L]

I owned a 99 B4 RSK japan import model & the car runs on 100octane as in their manual recomendations.

If you used 98octane or lower the car tends to doen boost to 0.5bar & does not maintain stock boost
of 0.7bar & 0.8bar resp. Try to use octane booster or premix with <6% toulene to act as booster
in your fuel if you cannnot get 100 in your area.

The jdm RSK has very sensitive & complex sensor dectection system inc. a built in anti-knock &
hydraulic valve adjustment. The stock ecu has detects poor fuel ratio / mapping & to protects the
engine by cutting overboost fuel & rev.

There are a few sites to look into the RSK inc. several NZ owners.

One in particualr by Australian / NZ owners is :

http://autos.groups.yahoo.com/group/LibertyTurbo

http://autos.groups.yahoo.com/group/legacyb4/