Fuel economy: Does a SAFC-II help? What about a MPFI swap?

[Syonyk]

*mutters unhappy things about the direction of fuel costs*

 

EA82, SPFI, 30-33mpg.

 

I'm removing the catalytic converter soon, and I'm wondering if using a SAFC-II to tweak fuel curves at cruise would gain me any significant fuel economy. The idea is to remove the O2 sensor from the ECU, and tune to be a bit lean of stoich (15:1 or 15.5:1 area) at cruise. On my RX-7, this netted a noticeable gain in fuel economy. Would the Subaru see the same effect?

 

Also, I can probably find parts for a MPFI swap fairly easily at a few junkyards I know of. Would this be worth much in terms of power/fuel economy?

 

-=Russ=-