R5HKK

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

BenRNBP

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

R5HKK

I have one but don't know what fuel trims are. Thanks for the response btw

Santenay

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.

R5HKK

Thanks for that, not really after gains, more concerned about the longevity of the engine.

​​​​​

Bubbels**

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?

s2konroids

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.

R5HKK

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.
​​​​