- US 2012+ Civic Si (ECU part number 37820-RX0-A03
- US 2013+ Acura ILX (ECU part number 37820-R9B-A02)
This reflash is specifically tuned for the USDM 2012+ Civic Si and Acura ILX
with K24Z7 engine.
- K24Z7-Si ECU flash program 7600 rpm rev limit - $295
Hondata does not sell direct - all sales and payment must be conducted
through Hondata dealers. The
upgrade information form must be sent with
The K24Z7-Si program advances the ignition, alters the cam timing and
optimizes the fuel which adds up to 15 peak HP.
2012 Civic Si
- 10-15 top end HP gain depending on the dyno and modifications
- 5-12 ft lb top end torque
- Rev limiter raised to 7600 rpm
- Improved throttle response
- Speed limiter removed
- VTEC point is
Does this fix 'rev hang'?
'Rev hang' is where the engine speed continues to rise even after the
throttle is released while shifting. It also can be felt while driving slowly,
where the vehicle surges forward after the throttle is released. The reflash
reduces the 'rev hang' effect to a minimum.
Does the reflash work well at altitude
The additional power from the reflash is generated by modifying the fuel,
ignition and cam angles. There are 10 tuning air pressure positions from sea
level to vacuum. Hondata tunes at sea level.
As you rise in altitude, the air pressure reduces. This does not affect the
fuel and cam angle changes, but it does affect the ignition changes . At around
8000 feet altitude there is no difference between the ignition timing for a
stock and a reflashed ECU. At around 3700 feet, the ignition changes are a
around half that of sea level.
Altitude changes do not affect the improvement Hondata has made to rev hang.
What if you have modifications?
This program was not tuned specifically for an intake. Any correctly designed
intake or exhaust modification should work well with this reflash.
Will this affect my warranty?
Any increase in RPM limit is at your own risk. If you suffer engine damage
that is related to excessive revs Honda / Acura will not cover your warranty.
With regard to aftermarket parts, the law is that warranty coverage cannot be
denied simply because such parts are present on the vehicle, or have been used.
For more details read the K series FAQ.