We wanted to leave our Bluetooth module permanently installed in the ECU. However the Bluetooth module is designed for static applications and the mechanical support is lacking. Kei Sport USA recommends using hot glue to pot the connector to prevent it from wobbling free. However we used some Kapton tape and closed cell foam. The foam is adhesive backed and we taped a block of it to the module. The foam sticks to the main PCB and the Kapton tape secures the Bluetooth PCB to the foam. We also wrapped a piece of tape around the connector. This way we can remove it in the future if needed. When using Bluetooth or USB, it is necessary to flip the dip switch (see arrow) to the ON position.Oxygen sensor replacement is tricky if only because Suzuki puts the oxygen sensor in a really awkward location with very little tool room (which is pretty much standard fare working on the Cappuccino). We were lucky and our sensor came free with a standard slotted oxygen sensor socket and breaker bar. Some owners may need to mangle their sensor out with vicegrips.With the old sensor out, the new Bosch sensor threads right in and is connected up with the Spartan 2. The wiring is excessively long but it can be zip tied out of the way. We also added a dab of anti-seize to our new sensor so it can be easily removed in the future if needed.It is advised to install Iridium spark plugs before installing the PNP and ignition timing is set to the factory 5° BTDC. We performed both of these steps in our last installment when we refurbished our ignition system. Take note that the standard -7 plugs are fine for those using stock boost but anyone who is turning up the boost or installing a bigger turbo, colder plugs are required.We also installed a Turbosmart manual boost controller. The factory wastegate is set to 0.8 Bar (11.6 psi) of boost. However the factory fuel system and bottom end can support a bit more (somewhere in the neighborhood of 1.0 Bar). We would like to take advantage of that headroom in the turbocharger while we’re tuning. We considered an electronic boost controller, but decided to stick with a basic Turbosmart manual boost controller. We’re maxing out the flow potential of our miniscule IHI RHB31 turbo so we’re really not concerned with boost spikes or boost creep.
3 comments
Time for a diff and sticky cheater tires for the cones!
Great writeup! Really looking forward to the Shorai battery details! looks like they have a size perfect for my NA6 Miata
Here’s an old MotoIQ article that discusses the basics of engine management systems:
https://motoiq.com/basic-control-systems/