TorganFM

So if I were to buy an EJ20 turbo from a vendor on ebay, what would I do for management? Switch up to obd2?

Smith-02

you mean an older ej20? the wrx is ej20 powered already. explain

TorganFM

yes an older ej20 from an early 90s turbo legacy

Smith-02

you can convert anything... as long as the old ej20 will accept sensors and such from an ej203

Slo_crx1

Most Subie guys that do a turbo engine swap end up swapping in the appropriate ecu too, but unfortunately have to rely on afc's and such types to try and add extra fuel. There are a certain few people who are working on obd1 subaru ecu's and early year obd2's to allow reflashing, but my guess is it's going to be a while before you see a fully functioning editor for them.
Upside to subaru EJ engine series: most everything is interchangeable like honda D/B series.
Downside is most jdm turbo EJ swaps require swapping complete engine/engine bay/dash harnesses and splicing a lot of connections.

Smith-02

i had a cel pop up in pulling 0 vac up a BIG hill today. ill check it when i get to work tomorrow, im hoping its p0420 or something will be warranty

TorganFM

Well I'd be fabbing the harness anyway, using whatever plugs I cut off an old EX harness. I could also use a chipped p28 to control the motor with Honda distributor guts in the Subie dist or something. The problem I see coming up is the speedometer and getting a Subaru vss to work with the Honda ecu.

Tom-Guy

Honda Speedo is looking for 2 pulses for every wheel rotation, it's actually pretty simple to modify an ABS ring on an axle to have two teeth, and shmitt trigger the output.

Smith-02

subaru doesn't use distributors. coil packs or COP.

on a thread related item, my p0420 came back. cleared it at work, gonna disable the cel this weekend via dannos laptop, unless some nerd geek knows of a good wireless usb.

Slo_crx1

Complex is right, except for extremely older subie's they're all waste spark COP designs.

Disable that p0420 and the stupid cat efficiency code will never bother you again.