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Thread: Ups and Downs of OBDI and OBDII

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    ShiftHappensLTi's Avatar

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    Ups and Downs of OBDI and OBDII

    well i am debating whether to upgrade my ecu to OBDII on my 1991 Legacy but I dont know if it would be better or just too much extra work.......

    What do you guys think?

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    Is the car a daily driver?

    You might squeeze a few MPG due to better fuel control but a lot of work is involved. Swapping sensors, wiring harness merge, more wiring, more sensors....blah blah blah

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    ShiftHappensLTi's Avatar

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    no its not my dd lol it is parked in the garage now that we just baught the wife a minivan lol so i have time to get things done to it lol. i just didnt know if it was worth it. OBDII hass the Cobb Accessport and OBDI has....well nothing that i can find tuning wise.....

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    Is it a turbo Legacy? If thats the case, for the trouble you will go through upgrading to OBDII, you're likely better off just running a basic stand alone ECU like Megasquirt (www.diyautotune.com). You will be able to do much more with a setup like that.

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    ShiftHappensLTi's Avatar

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    well it will be turbo lol i have the TD04 sitting on the workbench. yea i was hoping to get to that XD whether OBDII or standalone would be better XD

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    Just go with a stand alone....it will be almost the same cost as converting to OBDII, and its a much better system. Take a serious look at Megasquirt. Ive used it before and loved it. It can control just about everything (flat shifting, nitrous, forced induction, launch control, etc)

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    ShiftHappensLTi's Avatar

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    ok i will definitely look into megasquirt. that mod is a little ways out but definitely will research it thanks John

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