i have an '86 NA, i was gonna buy the stage 2 RTEK s4 tuner but it only compatible with the '87 and '88 ECUs. what else is out there? i want something with similar functionality as the RTEK. namely, using a wideband sensor to tune my a/f ratios.

or could i even swap in a newer ECU?

 

there are so many things wrong there I dont know where to start.

 

RTEK2.O are compatible with 86 RX7.

 

Kinda a waste on an N/A though unless you've taken the block apart.