Yamaha Apex HALTECH EFI System DEVELOPMENT

160+ HP, Dyno Proven, Fuel Trim to Rev Limit, NTK O2 Sensor, Knock Sensing, Full Onboard Data Logging, Remote Tuning

Base System is to replace the factory Yamaha ECM and Wiring Harness with all new components for an aviation type application. This new EFI system utilizes the Haltech ECM along with a brand new custom built aviation grade wiring harness. All harnesses are built in-house with Tefzel wire and are wrapped from the firewall forward. This new Haltech system adds features of Knock Sensing / Compensation, Fuel Trimming / “Auto Tune” via NTK Wideband O2 Sensor to WOT along with Long Term Fuel Trims “Learn” that is customer accepted, IAT Spark compensation, FULL onboard data logging and Tuning. For 2011-2018 the factory IACV is also used for great cold weather starts and smooth & consistent idle. 2011-2018 systems are supplied with a preset fuel pressure regulator as well. Engine monitoring can be done via laptop but NO Dash / EMS is included in base system. See options below for full plug-n-play “EMS” solutions.

This system is designed for Experimental Aircraft and includes the following:

  • Haltech S2 ECM pre loaded with BD Turnkey Engines Naturally Aspirated tune. Proprietary tables password protected

  • Onboard data logging via built-in 128MB of memory.

  • Built in WiFi for wireless connectivity via Laptop or App.

  • NEW Wiring Harness, aviation specific Tefzel wire with all new plugs and wrapped FWF.

  • NTK Wideband O2 Sensor with fuel trimming “Auto Tune” to WOT and Long Term Fuel Trims / “Learn” (customer accepted).

  • Ignition igniter, 4 channel.

  • IAT Temp Sensor, w/ aluminum weld in bung.

  • Fuel Filter / Regulator w/ AN adapters (2011-2018).

  • Complete & Detailed Install Manual w/ pictures, initial setup, start, & troubleshooting procedures.

EMS / DASH OPTIONS

These options are for when adding Engine Monitoring. We still use the AEM’s Digital Dash - “EMS” with the Haltech ECM. It is the most customizable currently for this application. Each dash comes pre loaded with a specifically configured layout for Aviation and associated common sensors as seen in pictures below.

  • 5in Digital Dash, Surface Mount, 30-5600 - $1400.00

  • 7in Digital Dash, Surface Mount, 30-5700 - $1800.00

  • Oil Temp Sensor, w/ metric adapter 30-2013 - $110.00

  • Oil Pressure Sensor, w/ adapter 30-2130-100 - $190.00

  • Fuel Pressure Sensor, w/ fuel rail adapter 30-2130-100 - $240.00

  • EGT CAN Module, 4 Sensors & Bungs - $800.00

The CUSTOM BD Digital Dash “EMS” displays the following information:

  • Engine RPM

  • Prop RPM

  • Engine Oil Temp

  • Engine Oil Pressure

  • AFR, air fuel ratio via wideband O2 sensor

  • Fuel Trim, +/- fuel adjustments from base fuel map

  • Fuel Pressure

  • Fuel Flow in Gallons per Hour

  • Available Max HP, corrected for altitude

  • Current % HP

  • Engine Coolant Temp

  • TPS, throttle position %

  • Volts

  • EGT, Exhaust Gas Temperature

  • IAT, inlet air temperature

  • HOBBS, total engine run time

  • Intake MAP, manifold pressure

  • Barometric Pressure

  • Injector Pulse Width

  • Injector Duty Cycle

  • Ignition Timing

  • Knock Timing Correction

WiFi Android & Apple App

Haltech does offer their Connect App for both Android and Apple phones. Full disclosure: I have not used this app or even tried it as I’m more of a laptop guy. So although the S2 ECM has this capacity, as of November 2024 I really can’t give an honest opinion or info on this feature.

BELOW WAS THE DEVELOPMENT OF THE HALTECH SYSTEM FOR THE APEX

September, 2024 - Apex Haltech EFI Flight Testing

I have about 5 hours of ground testing and about 20 hours of flight testing on our new Haltech EFI system for the APEX. I should be ready to build these systems for customers SOON.

Haltech Features:

  • NTK O2 Sensor - More robust to leaded fuels

  • Long Term Fuel Trim / Learn Table - Customer Adjustable

  • Nexus S2 ECM

  • WiFi & Mobile Application

  • Onboard Data logging, 128Mb - About 2 hours / 60 ch.

  • Altitude Fuel Compensation Table

  • WOT Timer - Enrichens lengthy WOT events

  • HOBBS meter built in

  • Fuel Flow/Burn in GPH

  • Available HP

  • Current Engine Load

Pricing for this system has not yet been finalized as I decide what combination of Haltech components is best for our application. Bottom line is it's not going to be cheap at approximately $4400 with ECM & Harness. Dash (EMS), and other non essential sensors like Fuel Pressure, Oil Pressure, Gear Box Temp, EGT's, etc will be at an additional cost. Will continue to use AEM 5" & 7" Dash's as they are still the most configurable for aviation.

Haletch Nexus S2 ECM Info: https://www.youtube.com/watch?v=C7rQEejbLfI

Side Note: I will still continue to support current customers that have our Apex AEM EFI system. It is a great system and is NOT obsolete. Holley (owners of AEM) simply discontinued the complete Infinity line of ECM's as they have solutions in the Holley brand.

July 2024: We are working on a Haltech EFI system for the Apex. We will continue to support the AEM systems we built and I still use AEM in my own plane. Holley purchased AEM some years ago now but went public with it in late 2022 I believe. Subsequently they decided to abandon the AEM Infinity Line of ECM’s. Not because the Infinity was outdated or obsolete but the reasons for this decision varied on the source, but product (chip) sourcing from Covid, continued backlash from EPA, and Holley simply having similar products with the Terminator, HP, and Dominator ECM’s all possibly had a play in the decision.

Haltech is not new to EFI as it was established in 1986 in Sydney Australia. All of Haltech components are designed, built, and tested in their own facility. Although the Haltech systems will be more expensive as an appropriate Haltech ECM alone is almost +$800 over the AEM Infinity 3 we used, NTK Wideband O2 Sensors are available to use along with more advanced ECM/PDM units. The NTK O2 Sensor is much more robust to leaded and exotic race fuels and Haltech’s new series of Nexus ECM/PDM units are vey full featured.

August 2024: Ground & Flight testing of the Apex Haltech system has begun.

Dash / Engine Monitoring

July 2024: Haltech makes a very nice line of Dashes for Engine Monitoring but at this time they are not configurable enough for our use in aviation for some of the more unique data we have come accustom to monitoring. They did just release an update that utilizes the new NSP software but I have yet to evaluate it and initial online reports are saying its still not as customizable as the AEM Dashes I’ve been using. Therefore for the time being and testing I will continue to use the AEM Dashes. But this may and probably will change as time goes on and the Haltech community demands the flexibility as seen with the AEM units.