h23a1 into 90 accord

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4short

Member
can i put a h23a1 into a 90 accord ex without having to change ecus? if not what all do i need to change anything would be helpful
thanks......
 
If you don't change the ECU, you won't be able to utilize the knock sensor or the secondary intake runners (IAB) on the H23. The stock ECU also would not have as aggressive of fuel maps as the ECU for the H23 would.
 
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