![]() ![]() For details on a straight Speed Density system, look at the MegaSquirt information here:Īnd read the information between the "Measured Values" heading and the "Ignition Input" heading.īy the time you make it to the "Ignition Input" heading, you'll probably be sorry you asked.Its got the ign retard and fueling options needed for proper ALS by sounds of it (rather than just launch control like on PFC Pro), tho idealy needs to be switched on when off throttle rather than just when clutch down, tho clutch down is good for drag racing on gearchange, its useless for street/track ALS use as youl be off throttle at other times, not just when shifting gears. So as the name says, it measures intake manifold pressure in absolute terms, usually in units of kPa (kiloPascals.) They typically have a linear voltage output as a function of pressure input: V(P) = aP + b, where "a" (units of volts/kPa) is the slope of the line between the zero pressure point and the max pressure of the sensor, "P" is manifold absoute pressure (in kPa), and "b" is the voltage offset from zero volts (in units of volts.)Įxactly how the information from the MAP sensor is used in an engine management system varies depending on the control algorithm. layzienoy Club Member Posts: 78 Joined: Sat 10:32 pm Location: jacksonville, florida I dont really understand MAP sensors, could someone help me out It was kinda expensive too, i think i lost the link though if someone wants me to find it, i'll take a lookįrom what i hear the commander is about the best you can do to tune it on your own, reason some people don't like it It allows you to access all the features of the powerfc, but i believe it is different from the excel dealers version The only problem with it is that the entire program is in japanese soĪ) i dont think it will work properly with a english based computerī) you need to understsand japanese to use it I dont think that this will help you but i found the computer softwear to use a laptop to tune the power fc I might be helping a guy fit a power fc to his ST185 in the next few weeks, but we don't know if he has the AP Engineering genII model, or the normal genIII model - both will work but more sensors will need to be swapped if it's the genIII model - if I find anything interesting I'll post some info back #Apexi power fc datalogit software serialThe other alternative is to buy the datalogit kit - some guys in New Zealand decided to reverse engineer the protocols the commander used and produce some kit to fully access the power fc, some software and a piece of hardware - this plugs into the power fc instead of the commander (though I think you can plug the commander into the datalogit box too - I've only got the power fc and the datalogit kit) With the datalogit box connected you can just plug a serial cable in and connect it to your laptop, run the datalogit software and away you go I've got a power fc on my ST205 (they do a specific version), basically if you get the commander you can map it, although not all features of the powerfc are available through it, but enough are - there is also the power excel software but Apexi keep it under wraps for their authorised dealers only - so far I've not heard of anyone with a copy ![]()
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