10 Frequently Asked Questions About Turbosmarts eBoost2 Controllers
November 19, 2020 News

10 Frequently Asked Questions About Turbosmart’s eBoost2 Controllers


eBoost2 Controllers

Turbosmart’s eBoost range of electronic boost controllers gives you the ultimate control over your boost curve. Turbosmart electronic boost controllers allow you to control three individual characteristics of your boost, by adjusting three easy to set parameters: The maximum boost pressure (set point), The spool-up rate of the turbocharger (wastegate pressure), and the reaction time of the controller (sensitivity).

1. Can I fit and setup an eBoost2 or eBoost STREET myself?

eBoost2 controllers are fully-featured programmable electronic devices. Turbosmart recommends using a reputable, qualified technician to install e-boost 2 controllers. If you are a competent, technically-savvy DIY installer. GREAT!  Then we suggest you carefully read and follow the instructions included with the unit.

2. 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. For example, if external switching an aux output is not being used leave the green, orange and white wires disconnected and insulate them from each other.

3. What is the basic connection method for an eBoost2 solenoid into an external wastegate?

  • Port-3 goes to pressure.
  • Port-2 goes to the bottom port.
  • Port-1 vents to atmosphere.

This is a basic setup and also the recommended starting point for boost control. The other hook up methods are designed to combat issues like high exhaust backpressure. Please see pages, 16-17 for all recommended solenoid connection methods.

4. I want to run a switch that has a bulb to indicate the switch is on. How much current can you safely pull through the green switching wire?

Please, don’t do it! The switching wires are only to see the ground. You will cook your eBoost controller quicker than you can say “WHOOPS!” If you want to run an indicator light. It’s imperative that you MUST use an isolation relay for the bulb’s circuit.

5. I have a turbocharged motorcycle with a Turbosmart wastegate and want to install an eBoost2 controller but I’m worried that it’s not waterproof.

Turbosmart’s eBoost two controllers are viral on turbocharged motorcycles. This is mainly because of their ability to provide six stages of sequential boost control. Most users mount them up on the triple clamps. An eBoost2 is NOT waterproof! However, with careful installation and a little silicone, they are quite water-resistant. This is something a lot of our customers can attest to.

turbo Charged Motorcycle eboost2

6. How does eBoost2 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?

eBoost two controllers are always looking for a ground signal to shift. For Example: If you turned the bike in 3rd gear, it’d only be at the setpoint.

  1. Since it has not seen a rising edge ground signal.
  2. It will always start from SP1 when starting up. If the bike is always started in neutral, then it should perform flawlessly.
  3. Another option would be ESP, as it looks for a continuous ground signal from each wire rather than a momentary ground. However, this will limit the number of boost settings to 4.

7. I’m re-mounting my eBoost2 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. However, if you are worried, take 5-10 minutes and note down all your settings. This will be helpful if you do accidentally change something.

8. After installing an eBoost2 / eBoost STREET my engine is over-boosting/under-boosting.

  1. First, check that the eBoost solenoid is installed correctly.
  2. Then, ensure the factory boost control solenoid is not connected to the hose between the pressure source and the wastegate actuator.
  3. Ensure the length of the wastegate actuator rod has not been modified. Please, refer to the manufacturer’s specifications. If the over/under/irregular boost is still occurring…
  4. Check if the eBoost solenoid is not blocked or contaminated with dirt, oil build-up or debris.
  5. Check the joining hoses for splits, cracks or loose connections. Ensure they are not blocked, kinked or restricted, particularly if the existing hose was reused.
  6. Pressure test the wastegate actuator for leakage. There is a possibility that the diaphragm or housing may be cracked or split. If the over/under/ irregular boost is still occurring…
  7. Ensure the smooth and free operation of the wastegate arm in the turbo exhaust housing.
  8. Make sure to check that the hose between the e-Boost and the inlet manifold is not obstructed, broken or kinked.
  9. Next, check that the OBS is higher than the boost pressure you aim for.
  10. Check the Blow Off Valve for leakage. Some are used as over-boost valves. If the over/under/ irregular boost is still occurring…
  11. The gate pressure may be set too close to your actual boost pressure. Ensure correct sensitivity setting.

9. 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.” Thus, resulting in possible engine damage.

10. What’s EMI and RFI and do they have any effect on my eBoost2?

There seems to be a cloud of mystique surrounding the EMI (Electromagnetic Interference) and RFI (Radio Frequency Interference.) Most common issues occur with some people calling it a fantasy and others blaming it for all of their car’s problems. 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.

What is the Source of EMI?

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. This causes erratic behaviour in electronic devices like ECUs or electronic boost controllers.

How to Reduce EMI?

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

How to Reduce the Noise effects of EMI?

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 an eBoost2 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 to Reduce Risk of EMI

Installing diodes into the ground wires of an eBoost2 loom can effectively reduce the risk of EMI affecting the functionality of an eBoost2.

  • The diodes will restrict the flow of current in one direction.
  • Therefore, the diodes only need to be installed on the ground wires that are being used. For example, 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. For example, The cathode is away from the head unit (As per the 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 an eBoost2.

Here is a handy self-help guide to helping you with your Turbosmart install and answers to some of the most frequently asked questions we get here. Turbosmart recommends that you get your products fitted and tuned by a qualified technician. If you choose to install the product yourself, ensure you have all the necessary tools and technical knowledge to perform this task.

Thank you for picking up the latest Turbosmart catalogue. As we look back on 25 fantastic years of innovation and growth, we continue to look towards the future as we release some revolutionary new products that will cement our reputation as innovators and market leaders.

Please contact us here and fill out a quick form so that our team can efficiently help you!

Custom setup and need advice?

Try our Product Advisor! This tool is designed to help you choose the right product for your project & help you choose the right Wastegate, Blow off Valve and fuel Pressure Regulator.

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Nearly 30 years ago, I embarked on this incredible journey of founding Turbosmart, and as we step into 2024, I've never been more proud of the Turbosmart team. We are on the verge of our most exciting chapter yet, as we unveil a monumental achievement—our new line of cutting-edge Turbochargers. Turbosmart is more than just a business; it's a community of enthusiasts dedicated to constant innovation in our products, support, and service. Thank you for being so supportive, and here's to another year of innovation and achievement with Turbosmart! #Engineered to Win!

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Turbosmart prides itself in providing customers with the absolute pinnacle in boost control management. Whether it be for your street or race application, Turbosmart has a range of boost controllers to help you service your needs.

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About Turbosmart

From our humble beginnings to establishing ourselves as a global brand, Turbosmart is well on track to lead the future in turbo technology.

Our engineers build and track-test all products in-house. Therefore, we ensure we continuously produce the highest-quality, highest-performance Turbochargers, blow-off valves, wastegates, boost controllers, fuel pressure regulators, oil pressure regulators and more. Furthermore, our products are designed and built for track and street applications.

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