• There were many reasons for the change of the site software, the biggest was security. The age of the old software also meant no server updates for certain programs. There are many benefits to the new software, one of the biggest is the mobile functionality. Ill fix up some stuff in the coming days, we'll also try to get some of the old addons back or the data imported back into the site like the garage. To create a thread or to reply with a post is basically the same as it was in the prior software. The default style of the site is light colored, but i temporarily added a darker colored style, to change you can find a link at the bottom of the site.

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  1. Rednaxs60

    1985 Honda GL1200 Limited Edition Computerized Fuel Injection System Upgrade

    Update: Mentioned the modernization of the OEM CFI IAC system. Installed a PWM IAC valve that flows too much supplemental air for the GL1200 engine. Installing a smaller one this week. Have done some rewiring, installed shielded cable for the crank and cam hall sensors. Was using the OEM...
  2. Rednaxs60

    1985 Honda GL1200 Limited Edition Computerized Fuel Injection System Upgrade

    Have competed the new TPS install and calibrated it. The "drive tang collar" is a piece of ABS sheet and works well. Have been testing to confirm "repeatability": Have also been working on the new PWM IAC system install. The OEM CFI IAC system was state of art back in the day, but it was an...
  3. Rednaxs60

    1985 Honda GL1200 Limited Edition Computerized Fuel Injection System Upgrade

    Have the air chamber out and the original CFI IAC system removed, IAC valve, water hoses. Bought a new Bosch NTC CLT sensor and have it installed. These don't last forever, so a small upgrade it is. Rad and right side timing belt removed waiting of the 36-1 trigger wheel. Bought a...
  4. Rednaxs60

    1985 Honda GL1200 Limited Edition Computerized Fuel Injection System Upgrade

    Not many older GW eft conversions or CFI modernization projects on going, if any that I have noticed.
  5. Rednaxs60

    1985 Honda GL1200 Limited Edition Computerized Fuel Injection System Upgrade

    It's in post #3. Sequential fuel and ignition. Best option for this old girl. A new aftermarket stand alone ECU makes this rather "easy" relatively specking. Keeping the OEM wasted spark and paired fuel injection keeps component cost down, but you're dealing with components that have no...
  6. Rednaxs60

    1985 Honda GL1200 Limited Edition Computerized Fuel Injection System Upgrade

    Have mentioned specific tuning and new CFI configuration regarding the IAC system upgrade, and using LTFT for VE table calibration. A small tuning aspect is to compensate for the different fuel injector latencies. I have checked Tuner Studio and could not find a fuel injector offset...
  7. Rednaxs60

    1985 Honda GL1200 Limited Edition Computerized Fuel Injection System Upgrade

    The AI came up with a very specific 3 phase tuning program for road trials. Phase 1 - straight and level road - targeting 40 to 60 kPa: in 3rd gear and stay in third gear, start at 2000 RPM and work your way up to 3500 RPM in 500 RPM increments. This is to target the 35 to 60 kPa range, and to...
  8. Rednaxs60

    1985 Honda GL1200 Limited Edition Computerized Fuel Injection System Upgrade

    The above post is rather long, but I have theory that it is better to explain and know the WHY even if it is a personal opinion. Easy enough to mention that a specific issue has been corrected and changes made on many an occasion, so follow along, blindly. The issue with this is that when things...
  9. Rednaxs60

    1985 Honda GL1200 Limited Edition Computerized Fuel Injection System Upgrade

    The engine MAP is currently at approximately 65 kPa at idle. This is apparently too high and should be more in the 45 kPa range. You can search on-line for answers but information regarding this is hard t find. Enter AI. I have mentioned using AI regarding this project and have queried the AIs...
  10. Rednaxs60

    1985 Honda GL1200 Limited Edition Computerized Fuel Injection System Upgrade

    Have started to use Claude Opus AI as well. I'm not as enamoured with "Claude" but will give it a chance. The difference between Google AI and "Claude" is that Google AI is free (for the present) and seems to do a good job. Google primarily uses its proprietary family of multimodal AI models...
  11. Rednaxs60

    1985 Honda GL1200 Limited Edition Computerized Fuel Injection System Upgrade

    @megagame: Queried the Google AI regarding codex and Claude Opus 4.8 early this morning, sleep schedule AFU. Spent about 1 1/2 hours querying the Google AI regarding my ECU project. Was suitably impressed. I think it was some 90 to 95 percent correct in all responses, can't give 100%. I...
  12. Rednaxs60

    1985 Honda GL1200 Limited Edition Computerized Fuel Injection System Upgrade

    Off the boat, in Lisboa (Lisbon) Portugal. Been on a cruise for 20 days. It'll be good to get home. New development, specifically using AI. Background, we are all using AI in some way shape or form. I would think mostly for on-line queries. We do this without breaking a sweat. I bring this...
  13. Rednaxs60

    1985 Honda GL1200 Limited Edition Computerized Fuel Injection System Upgrade

    When it comes to an EFI system or conversion, the KISS principle is the best, unless a person has some machiavellian tendency. I wanted to learn about the fuel pressure tracking, same with installing and using an external MAP sensor. All good. Other upgrades such as going sequential was for...
  14. Rednaxs60

    1985 Honda GL1200 Limited Edition Computerized Fuel Injection System Upgrade

    Good morning. Fuel pressure doesn't fluctuate much. The fuel pressure regulator (FPR) I have installed is not the OEM FPR, it is one for a Subaru I think; however, it has a base fuel pressure of approximately 3 bar (43 PSI). The OEM FOR has a rating between 28 to 32 PSI. Either is good but...
  15. Rednaxs60

    1985 Honda GL1200 Limited Edition Computerized Fuel Injection System Upgrade

    Good morning @megagame. Project has evolved since I started. The new 360 cc/min high impedance fuel injectors are OEM Bosch, physical swap. Had issue with the Bosch clone fuel injectors regarding calibrating the VE table. The fuel injector latency affects the fuel injector pulse width. Too...
  16. Rednaxs60

    RT rescued from graveyard

    @megagame: thread that I have started: https://www.spyderlovers.com/threads/1985-honda-gl1200-limited-edition-computerized-fuel-injection-system-upgrade.166734/#post-1758025. Lots of information to share, at least I think so.
  17. Rednaxs60

    1985 Honda GL1200 Limited Edition Computerized Fuel Injection System Upgrade

    Yes, bike is ride ready, on the road doing engine tuning.
  18. Rednaxs60

    1985 Honda GL1200 Limited Edition Computerized Fuel Injection System Upgrade

    Overview of the MaxxECU Sport, and some of the attributes of the engine tuning software - An extremely well designed, forgiving (yes, we make mistakes), and high end aftermarket ECU with a plethora of good features/functions. It comes with a substantial wiring harness, 10 feet in length. Every...
  19. Rednaxs60

    1985 Honda GL1200 Limited Edition Computerized Fuel Injection System Upgrade

    Having posted the above information, and learning from the school of hard knocks, I need to detail the new configuration so that what follows will make some sense. The new CFI configuration is: MaxxECU Sport Sequential fuel and ignition Spark units have been replaced with a Bosch 211 four...
  20. Rednaxs60

    1985 Honda GL1200 Limited Edition Computerized Fuel Injection System Upgrade

    Most of this thread will be based on my personal experience and as such, I've made a lot of mistakes, but did make it to the road on several occasions with the Speeduino ECUs and now the MaxxECU. A good piece of advice is to not try to duplicate the OEM CFI system design, we do not have the...
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