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Exhaust and intake - do I need an aftermarket ecu

Old 04-12-2018, 01:55 PM
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Default Exhaust and intake - do I need an aftermarket ecu

I bought a K and n intake a while back to make the car sound better. Now my exhaust hangers have rusted and can't really be repaired. So I've got myself a custom single exit exhaust. So with these 2 mods do I need an ecu remap for potentially running too lean, I don't really want to buy an ecu etc ideally. Or will I be fine without.

Thanks for the info as always
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Old 04-12-2018, 02:35 PM
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You'll be fine, although you could get a Bluetooth/Wifi ODB2 dongle and look at the Long term fuel trims for peace of mind
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Old 04-12-2018, 02:39 PM
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I have one but don't know what fuel trims are. Thanks for the response btw
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Old 04-13-2018, 12:35 AM
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Default Re-remap

I changed my intake and exhaust manifold and did notice a slight improvement in how the car drove. I then had the car remapped using a Hondata Flashpro, this made a big difference especially in the mid range. To use the Hondata the car must be my06 or younger.
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Old 04-13-2018, 01:12 AM
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Thanks for that, not really after gains, more concerned about the longevity of the engine.

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Old 04-15-2018, 01:30 AM
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How about full exhaust (header/test pipe/catback), intake and throttle body? Would probably need to port the intake manifold as well when using a bigger TB?
I assume this would need a remap, but what ECU is recommended for remapping an older model using only bolt-ons?
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Old 04-16-2018, 11:09 AM
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You run lean for a short period of time when vtec engages after that its fine, its only something you need to think about if you are on a track or for sustained periods of time.

Running a number of bolts like I/M/E of you run leaner more so at vtec andin WOT but nothing i would call dangerous - you need a tune to reap rewards anyways.

You have lots of choice really depends what your tuner is comfortable with, i tune S2000's with anything from simple VAFC2 through to a greddy emanage ultimate and AEM v2 standalone.

You can my feedback on here, facebook or my website.

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Old 04-20-2018, 08:17 AM
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So from the little research I did and from all your responses - thank you - the conclusion reached is no remap required in terms of engine safety from just an exhaust and ecu.

FYI for those interested my custom single exit exhaust that I bought from a guy on fb sounds insane along with the K and n intake. It's quite loud although I've got nothing to compare to but it's a welcome change after 3 years.
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