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Summary of change:
Got a good deal on a volvo 740 turbo, ---- '''current modifications''' Only a larger intercooler from a 850R estimated power 220-240 hp ---- TODO: Get a stock ECU that fits the connector, and kill it to make an adapter harness Trigger is a auditrigger-style, counting the starter gear and a crankhome pin. No hall sensor This seems to be supported by InputTrigger/AudiTrigger configuration, with changed another_trigger_tooth (but same tooth_wheel settings) * '''Four cylinder''' engine ** fire order : 1342 (I assume) * 142 teeth on the starter gear ** which means the processor sees 284=4*71 primary trigger pulses for each secondary trigger pulse ** '''another_trigger_tooth=47''' (decimal 71). this is the big difference compared to the 135 tooth auditrigger config ** '''tooth_wheel=87''' (decimal 135). one would think that tooth_wheel=8e (decimal 142) is right, but this variable is only used to activate the auditrigger-style trigger processing. So use the same as for auditrigger *crankhome signal 62 dbtdc cyl '''1''' ('''?''') * write about the cam-HALL polarity. Might require some measurements, ** '''no cam hall on this car. as written on top of the page''' ** since some HALL sensors pull down their outputs to GND when they see ferromagnetic metal in the shutter => higher magnetism (such as B field > 6 milliTesla). This is common for unipolar sensors. ** other HALL sensors (such as the factory audi HALL that goes with the 135-tooth engine) pulls down the output when it sees air ---- '''Ignition outputs and settings''' wasted spark or 4 COP coils ? A: Distributor to start with. If wasted spark, the ignition does NOT require to mask out every 2nd crankhome VR with the cam-HALL. * rethink the ** trigger_tooth (I expect that this will be decimal 69 = 0x45 or so, 1 tooth after the crankhome pulse detected - yes, unlike the normall missing tooth setup, for auditrigger the tooth counter counts down for efficiency) *** '''Counts down from another_trigger_tooth?''', Then i finally understood this too. ** ign_tdcdelay=78 (decimal 120, that is 60 degrees; slightly lower will work too...). Because the cyl number is even, this is regardless if the crankhome signal is seen 62btdc cyl1 or 62btdc cyl4. ** and h[2]=... no surprise here. Just work out if crankhome-VR is seen 62btdc cyl1 or cyl4 to match the setup this engine. Will have to postpone installation to some day later this week.
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