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Message: <blockquote data-quote="rz5.0" data-source="post: 1219867" data-attributes="member: 12700">[h=3]ECU Implementation[/h]this applies to some 92+ (superoupe, 4cyl stang, lincoln mark 8) and ALL 94+ ecu's this <a href="http://www.efidynotuning.com/ford/foxtiming.htm" target="_blank">DOES NOT APPLY TO THE </a><a href="http://www.efidynotuning.com/ford/foxtiming.htm" target="_blank">OLDER GUF (foxbody) ECU'S, Foxbody tuners CLICK HERE</a> at any given time the actual spark delivered is the lowest spark the ecu calculates idle (feedback) spark is calculated from the mbt using the torque limiting function fn799 from the following scalars spk_load_res - feedback spark desired torque (setting this to 0 will give you maximum idle spark) after fbs_entry_tc - feedback spark entry time constant which is clipped by spk_fbs_min - feedback spark min and oscillated by spk_fbs_gain - feedback spark gain not to exceed tr_delta - feedback spark torque ratio max delta (recommend value of 1 in all calibrations) the mbt spark table fn2300 is modified by the adder for lambse function fn730 the adder for egr function fn731 and the adder for vs fn743 its only neccessary to dial in the MBT spark functions when you have an ecu controlled automatic transmission now you can't get into idle feedback spark unless both the idle flag and the closed throttle flags are set, which is going to be primarily due to the IDLRPM scalar and its hysteresis, just make sure your idle air is dialed in and the idlrpm scalar has been adjusted correctly and all should be well base spark, the sealevel fn2100 and altitude fn2110 tables are modified by: ect fn2120 lambse fn2140 egr fn711 and bp bias fn712 for ease of keeping track of timing many folks just set the base tables high, say 60, ecu uses the lowest calculated spark borderline knock is the most used table as it has the most inputs for knock suppression, the borderline knock table is what i use and recommend everyone else to as well the borderline knock table fn2200 is modified by the following which are sub-modified as noted: ACT retard is fn725a multiplied by fn2230 (i recommend setting fn2230 to all 0.1s and setting the act retard function to go like, 254 = -80, 130 = -40, 94 = 0, -254 = 0, all else below repeat) lambse fn2240 ECT fn724a multiplied fn2220 (i recommend setting fn2200 to all 0.1s and setting the ect retard function to go like, 254 = -80, 234 = -40, 224 = 0, -254 = 0, all else below repeat) transient load fn2250 sub-mod by the lug timer fn723 egr fn721 bp fn722 for example: lets say your idling at 750rpm @ 16 load, looking in the mbt table we get an interpolated value of ~33 degrees, the scalar spk_load_res is set to .9 which is the torque ratio from mbt the ecu is demanding, it references fn799 spark mbt retard for torque limiting to see how much to adjust the mbt spark to get its desired tq ratio, lets say .9 = -15 in the fn799 function, this gives us an idle spark of 18 be careful with the spark mbt table fn2300 as thats how torque modulation is referenced to variate transmission tv pressure on ecu controlled automatic trans equipped vehicles again, the ecu uses the lowest calc'd spark fn741 is the low load limit spark used when air mass is below the stab_lold_am scalar, most set this function high if not already done in the stock cal to null it (i recommend a value of 63.75) tip in retard yanks timing when the throttle is opened beyond the scalar kacrat - tip in throttle position which can be disabled by maxing it out ~5.1v or 1023 ad counts (this scalar DOES NOT get referenced in CBAZA) else the tip_min_spk scalar is the minimum spark demanded WHEN a tip in has occurred, not how many degrees to retard as many think, you can set this to 60 to null tip in retard if you don't have kacrat available in your def file you then have your global spark modifiers like: spk_add - usually 0 spk_mul - multiplier usually 1 spuclp - max spark clip usually 55 or so splclp - min spark clip usually 0 later on you then have individual cylinder spark control also keep in mind the mbt retard limiter function fn799 and spark derived torque ration fn766 should mirror each other spark oscillation modulation is a steady state spark modifier to aid in stabilizing the current rpm, the SOM table fn2020 is modified by fn746 and fn745, i recommend setting the SOM table to 0 set the base timing to ten (10), not only is the base timing important, but the orientation of the distributor is as well so injector timing is accurate install the dis as per the ford specifications</blockquote>