Hey, it's nice to see another DIY effort running on the stock ECU. I posted this on NASIOC but clearly all the talent is over here on RS25.
The major difference between our approach appears to be that I stopped merging my harness at the heater core and you carried all the way through the TCM. Maybe yours was the better approach.
Funny, I had a similar idea about the tachometer and you've already proved it to work. Great job. Maybe I can emulate my missing TCM with the same hardware. Your headers and intake deserve a lot of credit too.
A gallery chronicling most of my EZ30D-->98RS efforts here:
Did a wrx 5spd at the same time. Car was 4EAT.
I have pretty good schematic worked up for swapping into the earlier cars. Some of the missing info came from the 02WRX-into-98RS swap guide here at RS25.com.
It's in, it runs, it leaks oil. (That's what they do I'm told.)
It has an exedy 3 puck and fidanza Al flywheel. Yes, it dies at every stoplight and there's no such thing as slipping the clutch.
ABS dead since it was A/T before (unsuccessfully tried grounding the A/T-ABS link wire).
P1596 Automatic Transmission Diagnosis Input Signal Circuit High
P1698 Engine Torque Control Cut Signal Circuit Low Input
I think the car needs a good intake and a tune. Looks like the openECU project made some headway in the last few years. Anybody have experience?
It's running a single-outlet WRX catback, no cats, OBX headers. As it sits, it runs head-to-head with a stock 02 WRX wagon. Not enough (yet) to justify the complexity of the swap to me.
A/C - haven't even got there yet.