e-Boost FAQ

Can I fit and set up the e-Boost2 or e-Boost STREET myself?
e-Boost2 is a fully featured programmable electronic device. Turbosmart recommends that you use a reputable, qualified technician to install and tune it for you. If you are a competent, technically-savvy DIY installer, we suggest you carefully read and follow the instructions included with the unit.

If I’m not using external switching or aux output should I leave those wires disconnected?
You only need to connect the wires that you’re actually using. If external switching and aux output is not being used leave the green, orange and white wires disconnected and insulate them from each other.

What is the basic connection method for the e-Boost2 solenoid into an external wastegate?
Port 3 goes to pressure, Port 2 goes to the bottom port and Port 1 vents to atmosphere. This is a basic setup and is the recommended starting point for boost control. The other hook up methods are designed to combat issues like high exhaust back pressure – see page 16-17 for all recommended solenoid connection methods.

I want to run a switch that has a bulb to indicate the switch is on. How much current you can safely pull through the green switching wire?
Don’t do it! The switching wires are only to see ground. You will cook your e-Boost quicker than you can say “oops” using your approach. If you want to run an indicator light, you must use an isolation relay for the bulbs circuit.

I have a turbocharged motorcycle with a Turbosmart wastegate and want to install an e-Boost2 but I’m worried that it’s not waterproof.
e-Boost 2 is very popular on turbocharged motorcycles, mainly for its ability to provide 6 stages of sequential boost control. Most users mount them up on the triple clamps. e-Boost2 is NOT water proof but with careful installation and a little silicone they are quite water resistant – something a lot of our customers can attest to.

How does e-Boost 2 know what gear it is in if I change gears while the power is shut off? Is there a “reset” feature or does it default to a certain point upon power-up?
e-Boost is always looking for a ground signal to shift. So if you turned the bike on in 3rd gear, it’ll only be at setpoint one since it has not seen a rising edge ground signal. It will always start from SP1 when starting up. If the bike will always be started in neutral, then it should perform flawlessly. Another option would be ESP, as it is looking for a continuous ground signal from each wire rather than a momentary ground but this will limit the amount of boost settings to 4.

I’m re-mounting my eBoost 2 and I don’t want to lose the current setup. Will the settings be retained with the unit unplugged?
No, you won’t lose anything if you unplug your eBoost2. But if you are worried, take 5-10 minutes and note down all your settings. it’ll be helpful if you do accidentally change something.
After installing the e-Boost2 / e-Boost STREET my engine is over-boosting/under-boosting.
• Check that the e-Boost solenoid is installed correctly.
• Ensure the factory boost control solenoid is not connected in the hose between the pressure source and the wastegate actuator
• Ensure the length of the wastegate actuator rod has not been modified, refer to the manufacturer’s specifications.
If the over/under/irregular boost is still occurring…
• Check to see if the e-Boost solenoid is not blocked or contaminated with dirt, oil build up or debris
• Check the joining hoses for splits, cracks or loose connections and ensure they are not blocked, kinked or restricted, particularly if the existing hose was reused
• Pressure test the wastegate actuator for leakage, the diaphragm or housing may be cracked or split
If the over/under/ irregular boost is still occurring…
• Ensure the smooth and free operation of the wastegate arm in the turbo exhaust housing.
• Check that the hose between the e-Boost and the inlet manifold is not obstructed, broken or kinked.
• Check that the OBS is set higher than the boost pressure you are aiming for.
• Check the Blow-off Valve for leakage, some are used as over-boost valves.
If the over/under/ irregular boost is still occurring…
• Gate pressure maybe set too close to your actual boost pressure – ensure correct sensitivity setting.

Do I need to check the Air-Fuel ratio while setting my boost pressure?
Yes. Any increase in boost pressure can cause the engine to run “LEAN”,
resulting in possible engine damage.

What’s EMI and RFI and do they have any effect on my e-Boost2?
There seems to be a cloud of mystique surrounding the EMI (Electromagnetic Interferece) and RFI (Radio Frequency Interference) issue, with some people calling it a fantasy and others blaming it for all of their car’s ills. The truth is, while EMI may not be the source of all evil, it is very real and it does have an adverse effect on sensitive electronic devices.

The source of EMI is any object that carries rapidly changing electrical currents, in cars, the most common source of EMI is an aftermarket ignition system. It is a proven fact that the ignition system, especially solid core plug wires can transmit EMI into the vehicle’s electrical system causing erratic behaviour in electronic devices like ECUs or electronic boost controllers.

The first and the most important step in reducing EMI is to follow the ignition system installation instructions EXACTLY to ensure all the electronic devices are wired properly.
Using helically wound spark plug wires can reduce EMI transmission as does shielding any sensitive electronic devices and their wiring, but the simplest and often most effective way of avoiding EMI is careful planning and routing of the entire ignition system away from all other wiring.

Aftermarket ignition systems, especially CDI, can create large amounts of electrical noise. Noise filters such as the MSD noise capacitor (#8830) can be wired into the power supply of the ignition system to eliminate large voltage fluctuations in the vehicles electrical system.
Connecting the ground wires of the e-Boost2 directly to the negative terminal of the car battery can also reduce the effects of EMI. This is especially important when the battery has been relocated to the boot or trunk of the vehicle.

Installing diodes into the ground wires of the e-Boost2 loom can effectively reduce the risk of EMI affecting the functionality of the e-Boost2. The diodes will restrict the flow of current in one direction. The diodes only need to be installed on the ground wires that are being used e.g. diodes only need to be placed on the trigger wires if external triggering is used.
The diodes need to be wired in so that the flow of current is away from the head unit, i.e. the cathode is away from the head unit (As per wiring diagram). The diode models that can be used are 1N4001 or 1N4002.

Use only resistor type relays when connecting the E-Boost2 to an auxiliary device. Normal relays can cause voltage spikes to the e-Boost2.

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