FD3s APEXi Power FC into a S4 FC3s
prefer using the APEXi Power FC engine management system for tuning purposes
and decided to figure out a way to use it for our Project
13B-RE Vert. We want to share this option with the RX-7 community, as
an alternative to the current systems available; Haltech, MicroTech, etc.
following this detailed 'How To', you can now install an FD3s APEXi Power
FC Engine Management system into your Series 4 Mazda RX-7 ('86 - '88)
with just the addition of a few items and some labor. Using this application,
your commander works and you also get to keep your Oil Metering Pump &
A/C! Additionally, as there is no need to remove your engine harness, the
system can be un-installed and the car easily returned to stock configuration.
It is recommended that you have a good general working knowledge of electrical
and mechanical systems in order to complete this installation correctly. Check
and double-check everything thoroughly before attempting to start the vehicle.
Failure to follow instructions can result in engine damage. Our recommendation
is that you have engine management system and components professionally installed.
Banzai Racing Inc. & associates DO NOT accept any liability for injuries
or adverse results arising from application of this procedure
Racing S4/FD PFC Harness Adapter
Racing GM 3-Bar Map Sensor Harness Adapter
Racing IAT Sensor Harness Adapter
3-Bar Map Sensor
FD3s Intake Air Temp (IAT) Sensor
of the following options: (NOT
included in kit)
FC Trailing Coil Pack (Recommended)
Igniter & Connector
Extension Cable (NOT included in kit & optional)
Fan & Relay
(NOT included in kit & optional)
Racing FC3s PFC Commander Holder
(NOT included in kit & optional)
- Soldering Iron &
- Shrink Tubing
- M10 x 1.25 thread
FD APEXi Power FC, PS/2 Cable & PFC Commander Holder
1 Harness Adapter
2 Adapter Installed
3 PFC Installed
4 PS/2 Cable Installed
Diagrams, Map Sensor and Air Intake Temperature Sensor & Harness
5 X-16 Connector
6 Bb-21 Connector
IAT/Map Sensor Adapters
8 GM 3-Bar Map Sensor
# 9 Air Intake
FC Trailing Coil Pack
Click on images
for larger view
Connect the 3' unterminated
wire on the adapter marked COR to the BROWN wire on the orange connector
(X-16 in the FSM Pic # 5) located behind the passenger-side kick panel.
- Disconnect the battery.
- Ensure that you have
all items and tools required.
Racing S4/FD PFC Harness Adapter (Pic # 1) to the APEXi Power FC
(Pic # 2).
ECU by disconnecting from engine harness. Remove Super-AFC and/or FCD if installed
at the ECU.
engine harness connectors to the Banzai Racing S4/FD PFC Harness Adapter.
Engine harness is now connected to the Power FC (Pic # 3).
- The Speed Sensor signal
originates in the instrument cluster. Connect the single 6' unterminated wire
on the adapter marked SS to the Green w/ Red Striped wire at either
of the following locations;
- The Cruise Control
CPU; located behind the kick panel on the driver-side of the vehicle.
- The Power Steering
CPU; located under the dash.
- If you do not
have either of these installed in your vehicle, you can connect it to
the Green w/ Red striped wire exiting the back of the instrument cluster.
Connection of this wire is optional, and is for commander display purposes
only. The commander will read out in Kilometers/Hour. It does not effect
the operation of the PFC.
Remove Knock Control
Unit. Connect the 3' unterminated wire on the adapter marked KS to
the GREY wire located on the Knock Control Unit connector (Bb-21 in FSM Pic
Remove factory Boost
Sensor (and FCD if applicable) and replace with GM 3-Bar Map Sensor (Pic
# 8) using the Banzai Racing Map Sensor Adapter Harness.
Install FD Intake Air
Temp Sensor (Pic # 9), using Banzai Racing IAT Harness Adapter.
- Ensure that you
connect the COR wire to the dash harness side not to the engine
harness side. This is necessary to trigger the circuit opening relay.
Install modified Trailing
Coil Pack with secondary igniter (Pic # 10). Click
Here for complete
'How To'. (If you prefer to install the FD Igniter, Click
Here for complete
Remove AFM (Air Flow
Meter) and attach Air Filter directly to TID (Turbo Inlet Duct).
Check all your connections.
Recheck all your connections.
Are you sure that your
connections are correct? Recheck connections again.
Reconnect the battery.
Turn ignition switch
to "ON" position and verify that the PFC Commander lights
If PFC Commander does
not light up, recheck connections.
If you have access to
a Datalogit, load supplied Base Map.
Start your car, and
verify you have spark at the trailing coils.
As with all aftermarket
engine management systems, have your car tuned by a professional.
- You can install
the IAT Sensor in the stock location by re-tapping the hole (M10 x 1.25
thread). Remove intake elbow from vehicle in order to prevent any metal
shavings from dropping into your engine.
- The sensor is not
polarized, so it does not matter which wires you connect.
- Due to our preferred
location for the Power FC, we installed a PS/2 Extension Cable (Pic #4).
This allows easy access for Datalogit connection. Click
Here for complete 'How To' instructions.
- The Banzai Racing S4/FD
PFC Harness Adapter is configured so that Power FC can be used in conjunction
with a relay to turn on an electric fan at a programmable water temp. The
supplied base map is already configured to turn on an E-fan at 87C. Click
Here for 'How To'.
- The short 8" unterminated
wire marked FRT allows you to install a full range TPS (S5 or FD).
- If you are using
the S4 TPS, splice the FRT wire to the 3F wire.
- The short 6" unterminated
wire marked BC can be used as a ground for an aftermarket Boost Control
want to consider installing the FC3s Banzai
Racing PFC Commander Holder
If you have any questions
about this How To, suggestions for updates please Contact
Racing Inc. & associates DO NOT accept any liability for injuries or adverse
results arising from application of this procedure