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when to upgrade the ECU

8K views 4 replies 3 participants last post by  nusdogg 
#1 ·
I was just wondering what bolt on's can you do on a 91 accord before you need to upgrade the ECU? I assume you are safe with a header and a short ram intake, but how about a mild cam, throttle body mods, or even a turbo without a lot of boost? any info you all can provide would be appreciated.
 
#5 ·
The only time you need to is when you start modding the internals of the engine such as cam(s), high compression pistons, turbo, supercharge, etc. Basic bolt-ons doesn't require it, but if you want to, you can.

It all depends on the owner what he wants to do.
 
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