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VEMS looks to be just the thing I was looking for to go beyond carburettors. == My project == * Guzzi V75/4 motorcycle * 90 degrees V-twin, firing interval 270/450 degrees * 750 cc, Normally aspirated. carburettors: 2x Dell'Orto 30 mm * 65 Hp approx, 7000 rpm max. * I already have a NB O2 sensor in one of the two exhausts (helped in jetting the carburettors. ) I will use the bike for street use only. Basically, I want to learn hands-on about EFI. I am not looking for a performance increase. Lower fuel consumption might be nice, though. ---- '''Trigger''' * VR sensor on the camshaft that gives two pulses per camshaft rotation. So the pulses are 270 and 540 crankdegrees apart. ** can you elaborate on this ? 270 + 540 = 810 (NOT 720) ---- '''Other engine bits''' Bought lots of second hand EFI bits from a Moto Guzzi Quota to make a start.. :) * Two intake manifolds with Weber-Marelli IW 042 injectors (16.2 Ohm, 190 cc/min @ 3 bar) * Throttle body with two 42 mm throttles and TPS * Fuel pump (Weber PI021), filter, regulator (2.5 Bar) * Various sensors and the original Marelli P7 ECU which I will not be using. == Plan == * Modify intake manifold to fit engine; fit throttle body, air filter, fit other EFI bits. * Generate more timing info; either by multi-toothed wheel for the camshaft VRS or add VRS on the crankshaft. I see VEMS supports 2 VRS sensors. This is good. * Buy VEMS! Nb. I would really like access to the firmware, as understanding what the firmware is doing is really a large part of the fun for me. == Eventually == * Have the VEMS do ignition as well as injection. * One, maybe two WB02 sensors? * Am thinking of alpha-n approach as that is what Weber-Marelli does on their system. * I have a WM pressure sensor (PRT 03/03) rated at 100 kpa. In the original system, it is used as an ambient pressure sensor. Can it be used as a MAP sensor in this NA engine should I wish to do Speed/Density?
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