ECU, what level of mods before it needs upgrading?

[GT-B Spec R Pilot]

As the title says, what level of mods can the factory ECU cope with on the EJ 25T? Is there a point where the standard ECU can still cope but an aftermarket unit would produce better results? By better I mean more reliable and give the tuner a better platform to tune from. Cheers

[KiDo_Tuning]

As the title says, what level of mods can the factory ECU cope with on the EJ 25T? Is there a point where the standard ECU can still cope but an aftermarket unit would produce better results? By better I mean more reliable and give the tuner a better platform to tune from. Cheers

You would be hard pressed to need aftermarket... this is on stock ECU

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Stock ECU handles a LOT and you can convert to speed density if the MAF voltage ever becomes a concern

There is only 3 ECU's capable of running a lot model car and they are no cheap

[GT-B Spec R Pilot]

Thanks Matt. It does make me wonder why anyone would want to part with their cash to buy something that effectively adds nothing the factory ECU cannot already handle though.

[kiahatsiu]

More tuners. There are a handful of guys who can do good work with stock ecus. Some people don't have access to them.