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Reply to "Engine swap- recommended Suby Engine Builder"

@edsnova posted:


Seems to me a little more compression, some port matching, an skosh more lift and duration on the cams, maybe a larger injector and then the all-important computer tune should make it happen.

The only question I have is "who is tuning the ECU?"



This is precisely what I had done on my Outfront 2.5 in addition to the ECU having a cold start solenoid output and an input from the AC to adjust idle speed when it's on.

John is doing the mapping. He's done a million of them and according to him and Greg the motor has a base map installed from John's library and given a light run-in on the engine dyno to make sure all is hunky dory. After the engine is in the car and drivable, it's taken back to Outfront where any final mapping tweaks are made on the rolling road.

The Link ECU uses MAP, TPS, IAT, RPM and up to 4 other user designated inputs (like the AC on/off signal, ambient AT, O2 for example) to adjust mixture & timing, so altitude adjustment won't be an issue. I'll excercise that as I can gain 7,000' in under an hour from the house. I'll undoubtably use the car to go visit my daughter in Denver, so 12,000' passes are in it's future, too. That's one of the reasons there's no carbs in my future. It should be a reliable, easy to maintain motor that's zips to redline while supplying plenty of torque and also ample heat and AC (remember this is a coupe).

I think that folks should remmber that even thought these power plants are more modern, putting in a Subie doesn't turn them into modern cars that you can ignore for months on end. It's still a 70 year old platform that requires regular nut-and-bolt sessions, chassis lubing, etc. It won't turn these into Miatas. And that's the point for most of us.

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