3 ms·

No. Two perspectives on this - currently working alongside Process Control Engineers, and I'd trust these guys to do this kind of work. The mindset and level of

No. Two perspectives on this - currently working alongside Process Control Engineers, and I'd trust these guys to do this kind of work. The mindset and level of detail is complete different from programming in non-critical fields. Our peer review process is comprehensive, and mandatory for all code changes, can be typical for 2+ weeks of dedicated review and analysis on small scopes of change. Secondly, theres a _lot_ in an ECU. I recently installed a custom ECU into my streeter (Autronic SM4), and the volume of control you have (3D F/A ratio maps, 3D ignition timing, cold start control, knock sensing, fuzzy logic for wear compensation such as dirty injectors / plugs etc) is staggering. On top of this you have exception management (like limp home mode if you blow something up). It's just like any other programmable logic controller. Additionally for cost savings they probably run the one codebase across a few different models, so not all of it would be executed code.

nickpinkston 16y ago
Ever use the Megasquirt system? I put one together a while back, but never got to actually get it hooked up to the engine. How's the Autronic?
- momotomo 16y ago
  Have heard of / but haven't used MS. Autronic install will actually be completed by 11/02. They're comparatively cheap and feature complete (3d maps, realtime tuning compensation, boost management etc). Had it recommended by a lot of people so far, and my local shop can tune them =) At this stage it's a waste, car is stock, but using the lead time to learn the tuning. Next phase is supercharging + NOS kit and related top end work, little bit excited for it. How is the MS actually structured, seems to have a few components to it?
  - nickpinkston 16y ago
    Yea, I believe the MS uses these sensors: Manifold Pressure, RPM, Intake Air Temp, Coolant Temp., and throttle position - to determine everything. It's very straight forward and pretty hackable - but I never actually did anything other than hook it to the "Stimulator" which was a board that acts as an engine to test the MS unit. I also used the HPTuners software to tweak my fuel / spark maps on my stock ECU, and it worked very well actually. Good luck with your project!

nickpinkston 16y ago

Ever use the Megasquirt system? I put one together a while back, but never got to actually get it hooked up to the engine. How's the Autronic?

momotomo 16y ago
Have heard of / but haven't used MS. Autronic install will actually be completed by 11/02. They're comparatively cheap and feature complete (3d maps, realtime tuning compensation, boost management etc). Had it recommended by a lot of people so far, and my local shop can tune them =) At this stage it's a waste, car is stock, but using the lead time to learn the tuning. Next phase is supercharging + NOS kit and related top end work, little bit excited for it. How is the MS actually structured, seems to have a few components to it?
- nickpinkston 16y ago
  Yea, I believe the MS uses these sensors: Manifold Pressure, RPM, Intake Air Temp, Coolant Temp., and throttle position - to determine everything. It's very straight forward and pretty hackable - but I never actually did anything other than hook it to the "Stimulator" which was a board that acts as an engine to test the MS unit. I also used the HPTuners software to tweak my fuel / spark maps on my stock ECU, and it worked very well actually. Good luck with your project!