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I have a Speeduino for my V6 swap. I made up a little PCB so I could keep in in the original ECU case. Honestly the stock ECU still runs better than my Speeduino at this point, but that's just because I haven't been able to really get the tune dialed in. On an NA motor I wouldn't expect to really gain much over the stock computer other than experience with the Speeduino and tuning - which is worth a ton especially if you plan to go FI someday.

Passive circuit component Circuit component Hardware programmer Electrical wiring Electronic engineering
Circuit component Passive circuit component Hardware programmer Computer hardware Electronic component
 
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