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This is from the DYI-EFI group who have been trying to create a homegrown EFI system from off the shelf items. These two guys (could be gals too) say that they have 2 units installed on cars right now. I have emailed them about using CHT sensor for air-cooled engines, and also asked if they were going to make the PCB or was this full tilt DYI. Quote +++++++++++++++++++++++++++++++++++++++++++++++++++++ MegaSquirt features an on-board Manifold Absolute Pressure (MAP) sensor (Motorola MPX4115). Having the MAP sensor on-board simplifies installation (one just runs a vacuum line to the ECU) and keeps the measurement signal clean, which is very important since the MAP signal is the most critical to proper fuel control. There are other Motorola MPX-series MAP sensors with expanded scales to handle turbo and supercharger applications, like the MPX4250A (this sensor handles 3 to 36 psi, or 20 to 250 KPa) - one can swap this sensor in with hardware change. The MAP sensor is additionally used to obtain the barometric pressure during engine startup, in order to determine a barometric pressure correction factor End Quote ===================================================== We would need a O2 sensor too, but thats ok. I'll post anything else I find out. Richard Jim Adney wrote: > On 28 Nov 2001, at 8:34, Richard Green wrote: > > > I got this off the MK1gti list. Looks like something we might could use > > as a replacement or carb conversion unit. > > > > <http://www.bgsoflex.com/megasquirt.html> > > > > I am still reading the info... > > Now THIS looks really cute, and I'm impressed that someone has actually > done the work for all of it. I am also just starting to read their stuff, but I > notice one problem: There is an absolute pressure gauge mentioned > somewhere on the schematics, but it's not there on the wiring diagram. In > fact that's a big problem because as shown there's nothing that tells us how > much air is going into the engine. (Throttle position itself is not enough.) > > Oops, I see it mentioned now. It's a Motorola chip mounted right on the PC > board, but I don't see it (means little) nor can I see where the vacuum line > comes into the box. I wonder if that chip is okay with gas and oil fumes, etc. > > - > Jim Adney > jadney@vwtype3.org > Madison, WI 53711-3054 > USA > > ------------------------------------------------------------------- > Too much? Digest! mailto:type3-d-request@vwtype3.org Subj=subscribe