Hey guys, putting together parts list for engine swap I am commencing
The donor;
03’ Outback 3.0 H6 auto
The victim;
02’ Lib wagon 2.5rx 5mt
I am posting this thread for any advice or pointers in relation to parts, wiring, things to look out for etc.
Before I start this I just wanted to be clear that i understand the undertaking is no easy feat. As it has been stated before on this forum, there are probably many easier conversions and a lot of more financially viable options, however, I have sunk to much time and money into the rx already and absolutely love the look of these cars that I don’t want to just throw it away.
First thoughts when putting together this build in my mind were mostly about driveability more than chasing power (yet)
My plan is to retain the existing gearbox and drive line, I have seen that a young chap on the site has achieved this pairing of the H6 with a 5mt, first concern is will the H6 3.0 actually bolt straight up to the 5mt? Or is there a custom adaptor required?
second concern is the clutch required as I have read elsewhere that the stock clutch, particularly the dm flywheel slip and cant stand up to the additional torque.
I am inclined to convert to a sm flywheel with a heftier clutch kit but would like some pointers on what would be recommended?
Would a sm flywheel and HD clutch kit to suit the old 2.5 work? What about a wrx clutch & flywheel?
As the H6 never came with a manual transmission (gen 3 anyway) I am not sure what would suit the motor.
My next thoughts are braking. Slightly heavier engine + increased torque = bigger brakes.
I could always replace the libs brakes with the outback’s for the time being but while the needs for something better is there I am thinking better to look into upgrade options..
Later model gt front rotors with calipers I’ve heard will fit with 17”s that I already have on the car. Does anyone know if any of the wrx 2/4 pot calipers and rotors work with the gen 3 libs?
Then there’s getting the H6 to work with the 5mt...
In my research I can’t really find any detailed information on this. From what I could find I have learnt the following;
-A speed sensor has to be wired in
-an extra wire added into the ABS system
-Neutral switch needs to be grounded at the ECU
-the start wire removed from the cruise
Does anyone have any more in depth info on this?
I would like to keep cruise control and I’ll be using the outbacks abs unit and ps pump so any advice or point me in the direction for a genius auto elect who can help out would be great.
As far as exhaust system goes my plan involved a stock b4 tt catback merging with the stock H6 headers.. depending on the actual pipe diameters this might or might not work so any info on this would be awesome too. I have seen a few grainy YouTube vids of kids with tt exhaust on the gen 3 outbacks but apart from shitty sound quality there’s next to no info on how they did it..
I will be updating the thread with new info, and updates on the build as I go, it would be good to hear from anyone with their 2 cents.