Why spend hundreds of dollars on a replacement computer, rewiring,
rising rate fuel regulators, check valves and extra injectors, when a
Hondata modified Honda ECU will run better? Not to mention more
reliably. No spark retard devices, no additional fuel or VTEC controllers,
no MAP pressure check valves, no extra injectors. A properly engineered
solution for your car using the best computer available.
The stock MAP sensor can read up to 11 lbs of boost. A stock ECU
generates an error code once the manifold pressure is more than about 1
lb, but Hondata has expanded the fuel and ignition table so that ignition
and fuel delivery can be fully mapped under boost.
If the stock MAP sensor is is replaced with a 3 bar MAP sensor, then 2
bar (about 29 lbs) of boost can be read. The switch from stock to 3
bar MAP involves changing one setting in the ROM Editor software; no
re-tuning is required. For more information see how to install
a 3 Bar Map sensor.
A boost cut is also provided to provide protection against waste-gate
failure or the vehicle driver exceeding the limitations of the engine or
fuel supply system by increasing the boost.
Boosted cars need bigger fuel injectors as stock Honda injectors are
designed to run to 100% duty cycle at maximum rpm. This leaves very
little headroom for increased engine output without running into
reliability issues from very high fuel pressure. The best way to
deliver more fuel for higher output applications is to increase the
injector size. Since Hondata ECUs can be re-calibrated for any size
injector, it is possible to run much bigger injectors than stock.
440cc - 900cc injectors are common. With the correct tuning large
injectors will achieve a stable idle and good fuel economy as well as
providing enough fuel for forced induction.
This is a quick guide to what you need to do to install Honda on a
forced induction vehicle:
- Remove any check valves between the MAP sensor and intake
manifold. Make sure the MAP sensor can see boost.
- Remove any VTEC controllers and any fuel controllers, additional
injectors and injector controllers.
- Remove any ignition boost retard devices
- Remove the rising rate fuel regulator and replace with a fixed 1: 1
rising rate regulator set to a base pressure of about 60 psi.
- If necessary re-locate the intake air temperature sensor to the
- Install bigger injectors. RC 440cc injectors are good for 300
wheel hp. For higher output applications you will need 550 cc or
larger peak and hold (low impedance) injectors, which requires an
injector resistor box found in earlier model Hondas. Buy these new
where possible (about $100 from a Honda dealer).
- Consider installing a high volume fuel pump which replaces the stock
pump. In-line additional fuel pumps are not recommended.
- Get the car dyno tuned!