Honda ECU's are pretty much just glorified PLCs. They read imputs from analog circuits and calculate when to fire what for how long, be it spark plugs or injectors. Unless your friend is an embedded systems programmer or has a lot of knowledge with realtime operating systems, he's going to have his work cut out for him. The idea behind realtime operating systems is that you have a finite amount of time to calculate and do something. If you fail, you might as well just turn off because you're screwed anyway. Hence, open loop mode on Honda ECU's. "BAH! Some sensor has lost it's mind. Run away, run away!" and it reverts to stock fuel curves, timing maps, etc. It may run like crap after that, but it should still run.
-Kristian On Wed, 28 Aug 2002, George Freeman wrote: > Thanks Kristian! A friend of mine who is a programmer is looking into > developing a tool for interfacing to an existing ECU. This would have to > involve either replacing the existing ECU or sitting in series with it > (since the Honda units lack any external inputs, except those cool European > ones with the prom socket). Guess if they debut a 2006 CRX Renaissance > model, that would just *have* to include user-tunable inputs for the onboard > computers (Honda, are you listening?). > > > George > '89 DX-Hybrid-D16Z6, 123k miles > "Seats, Suspension, Engine, MSD, next=dyno" > > > > -----Original Message----- > From: Kristian Hoffmann [mailto:[EMAIL PROTECTED]] > Sent: Wednesday, August 28, 2002 1:12 PM > To: George Freeman > Cc: CRX Mailing List (E-mail) > Subject: Re: CRX: ECU emulators > > > In fast and the furious they were using fuel management systems. > Essentially replacement ECUs that are fully programmable. I know a guy > with a turbo NSX (17 pounds of boost) that runs a TEC2 from electromotive. > Zdyne makes one too, the Gold SuperECU. > > http://www.electromotive-inc.com/ > > http://www.zdyne.com/ > > http://www.hondata.com/ > > All are about $1000, plus or minus a couple hundred. I don't think any of > them have the "Manifold temperature critical" warning. :) > > -Kristian > > On Wed, 28 Aug 2002, George Freeman wrote: > > > I remember a discussion years ago on the list about ECU emulators but > > haven't heard whether or not there were any new software utilities. It > > would be cool to do a laptop/USB-to-ECU interface to re-program the ECU on > > the fly (a-la "Fast and Furious"). Anyone know of any updated ECU > software > > emulators for the CRX? > > > > > > George > > '89 DX-Hybrid-D16Z6, 123k miles > > "Seats, Suspension, Engine, MSD, next=dyno" > > > > > > > >
