High settings with SAFCII...negatively affecting things?

[IwantMKIII]

Finally got the ZT-2 WB hooked up today:icon_bigg

I've done 4-5 pulls with tuning each using ISNMS's SAFCII Excel spreadsheet.

I had a base tune awhile back and it ranged anywhere from 0 to -11 Hi throttle points. AFR's on base tune ranged mostly from 10-10.3

Using the spreadsheet I got an approximate range of 11-12AFR, primarily 11.2-11.6.

however this requires some big adjustments via SAFCII and isnms informs me that this can start to affect timing....so...what should i do about this if this is true? I have noticed little to no performace difference after adjusting things to where they are (to start my Afr's were primarily 10.0-10.3). I notice between 5-6K that it has a very flat uneventfull power band....not much pull to it, maybe because im still using teh ct26

my Hi throttle points for the last run:

3000 -4
3400 -7
3800 -12
4200 -14
4400 -15
4600 -18
4800 -19
5000 -17
5200 -16
5400 -17
5800 -17
6000 -19


here is my last run in 3rd gear if it helps at all (ignore boost and EGT, user1 is Ox sensor):

Time, AFR, RPM,Boost(PSI/inHg), EGT(F), TPS, User1


11:45:59 PM, 12.70, 2408, -25.50, 393, 83, 0.00
11:45:59 PM, 12.70, 2408, -25.50, 393, 83, 0.00
11:46:00 PM, 12.60, 2400, -25.50, 393, 83, 0.00
11:46:00 PM, 12.60, 2408, -25.50, 393, 83, 0.00
11:46:00 PM, 12.60, 2430, -25.50, 393, 83, 0.00
11:46:00 PM, 12.50, 2446, -25.50, 393, 83, 0.00
11:46:00 PM, 12.50, 2415, -25.50, 393, 83, 0.00
11:46:00 PM, 12.50, 2462, -25.50, 393, 83, 0.00
11:46:00 PM, 12.50, 2430, -25.50, 393, 83, 0.00
11:46:00 PM, 12.50, 2462, -25.50, 393, 83, 0.00
11:46:00 PM, 12.40, 2454, -25.50, 393, 83, 0.00
11:46:00 PM, 12.40, 2454, -25.50, 393, 83, 0.00
11:46:00 PM, 12.40, 2502, -25.50, 393, 83, 0.00
11:46:00 PM, 12.40, 2454, -25.50, 393, 83, 0.00
11:46:00 PM, 12.40, 2469, -25.50, 393, 83, 0.00
11:46:00 PM, 12.40, 2469, -25.50, 393, 83, 0.00
11:46:00 PM, 12.30, 2485, -25.50, 393, 83, 0.00
11:46:00 PM, 12.30, 2477, -25.50, 393, 83, 0.00
11:46:00 PM, 12.30, 2502, -25.50, 393, 83, 0.00
11:46:00 PM, 12.30, 2552, -25.50, 393, 83, 0.00
11:46:00 PM, 12.30, 2526, -25.50, 393, 83, 0.00
11:46:00 PM, 12.30, 2552, -25.50, 393, 83, 0.00
11:46:00 PM, 12.30, 2543, -25.50, 393, 83, 0.00
11:46:00 PM, 12.30, 2510, -25.50, 393, 83, 0.00
11:46:00 PM, 12.30, 2543, -25.50, 393, 83, 0.00
11:46:00 PM, 12.30, 2518, -25.50, 393, 83, 0.00
11:46:00 PM, 12.20, 2577, -25.50, 393, 83, 0.00
11:46:00 PM, 12.20, 2552, -25.50, 393, 83, 0.00
11:46:00 PM, 12.20, 2560, -25.50, 393, 83, 0.00
11:46:00 PM, 12.20, 2518, -25.50, 393, 83, 0.00
11:46:00 PM, 12.20, 2510, -25.50, 393, 83, 0.00
11:46:00 PM, 12.10, 2577, -25.50, 393, 83, 0.00
11:46:00 PM, 12.10, 2577, -25.50, 393, 83, 0.00
11:46:00 PM, 12.10, 2586, -25.50, 393, 83, 0.00
11:46:00 PM, 12.10, 2603, -25.50, 393, 83, 0.00
11:46:00 PM, 12.10, 2586, -25.50, 393, 83, 0.00
11:46:00 PM, 12.10, 2586, -25.50, 393, 83, 0.00
11:46:00 PM, 12.10, 2630, -25.50, 393, 83, 0.00
11:46:00 PM, 12.10, 2595, -25.50, 393, 83, 0.00
11:46:00 PM, 12.10, 2612, -25.50, 393, 83, 0.00
11:46:00 PM, 12.10, 2630, -25.50, 393, 83, 0.00
11:46:00 PM, 12.10, 2648, -25.50, 393, 83, 0.00
11:46:00 PM, 12.10, 2621, -25.50, 393, 83, 0.00
11:46:00 PM, 12.00, 2657, -25.50, 393, 83, 0.00
11:46:00 PM, 12.00, 2648, -25.50, 393, 83, 0.00
11:46:00 PM, 12.00, 2667, -25.50, 393, 83, 0.00
11:46:00 PM, 12.00, 2685, -25.50, 393, 83, 0.00
11:46:00 PM, 12.00, 2667, -25.50, 393, 83, 0.00
11:46:00 PM, 11.90, 2667, -25.50, 393, 83, 0.00
11:46:00 PM, 11.90, 2685, -25.50, 393, 83, 0.00
11:46:00 PM, 11.90, 2685, -25.50, 393, 83, 0.00
11:46:00 PM, 11.90, 2695, -25.50, 393, 83, 0.00
11:46:00 PM, 11.90, 2695, -25.50, 393, 83, 0.00
11:46:00 PM, 11.90, 2714, -25.50, 393, 83, 0.00
11:46:00 PM, 11.90, 2704, -25.50, 393, 83, 0.00
11:46:00 PM, 11.80, 2733, -25.50, 393, 83, 0.00
11:46:00 PM, 11.80, 2723, -25.50, 393, 83, 0.00
11:46:00 PM, 11.80, 2714, -25.50, 393, 83, 0.00
11:46:00 PM, 11.80, 2793, -25.50, 393, 83, 0.00
11:46:00 PM, 11.70, 2743, -25.50, 393, 83, 0.00
11:46:00 PM, 11.70, 2753, -25.50, 393, 83, 0.00
11:46:00 PM, 11.70, 2753, -25.50, 393, 83, 0.00
11:46:00 PM, 11.70, 2753, -25.50, 393, 83, 0.00
11:46:00 PM, 11.70, 2753, -25.50, 393, 83, 0.00
11:46:00 PM, 11.70, 2783, -25.50, 393, 83, 0.00
11:46:00 PM, 11.70, 2783, -25.50, 393, 83, 0.00
11:46:00 PM, 11.60, 2803, -25.50, 393, 83, 0.00
11:46:00 PM, 11.60, 2844, -25.50, 393, 83, 0.00
11:46:01 PM, 11.60, 2834, -25.50, 393, 83, 0.00
11:46:01 PM, 11.60, 2844, -25.50, 393, 83, 0.00
11:46:01 PM, 11.60, 2866, -25.50, 393, 83, 0.00
11:46:01 PM, 11.50, 2834, -25.50, 393, 83, 0.00
11:46:01 PM, 11.50, 2866, -25.50, 393, 83, 0.00
11:46:01 PM, 11.50, 2866, -25.50, 393, 83, 0.00
11:46:01 PM, 11.50, 2844, -25.50, 393, 83, 0.00
11:46:01 PM, 11.50, 2876, -25.50, 393, 83, 0.00
11:46:01 PM, 11.50, 2887, -25.50, 393, 83, 0.00
11:46:01 PM, 11.50, 2855, -25.50, 393, 83, 0.00
11:46:01 PM, 11.50, 2866, -25.50, 393, 83, 0.00
11:46:01 PM, 11.40, 2920, -25.50, 393, 83, 0.00
11:46:01 PM, 11.50, 2931, -25.50, 393, 82, 0.00
11:46:01 PM, 11.50, 2954, -25.50, 393, 82, 0.00
11:46:01 PM, 11.50, 2931, -25.50, 393, 82, 0.00
11:46:01 PM, 11.40, 2920, -25.50, 393, 82, 0.00
11:46:01 PM, 11.40, 2988, -25.50, 393, 82, 0.00
11:46:01 PM, 11.40, 2920, -25.50, 393, 82, 0.00
11:46:01 PM, 11.40, 2943, -25.50, 393, 82, 0.00
11:46:01 PM, 11.40, 2943, -25.50, 393, 82, 0.00
11:46:01 PM, 11.40, 2954, -25.50, 393, 82, 0.00
11:46:01 PM, 11.40, 2977, -25.50, 393, 81, 0.00
11:46:01 PM, 11.40, 3012, -25.50, 393, 81, 0.00
11:46:01 PM, 11.40, 3024, -25.50, 393, 81, 0.00
11:46:01 PM, 11.40, 3036, -25.50, 393, 81, 0.00
11:46:01 PM, 11.40, 3012, -25.50, 393, 81, 0.00
11:46:01 PM, 11.30, 3060, -25.50, 393, 81, 0.00
11:46:01 PM, 11.30, 3036, -25.50, 393, 81, 0.00
11:46:01 PM, 11.40, 3048, -25.50, 393, 81, 0.00
11:46:01 PM, 11.40, 3060, -25.50, 393, 81, 0.00
11:46:01 PM, 11.40, 3072, -25.50, 393, 81, 0.00
11:46:01 PM, 11.30, 3084, -25.50, 393, 81, 0.00
11:46:01 PM, 11.30, 3084, -25.50, 393, 81, 0.00
11:46:01 PM, 11.30, 3036, -25.50, 393, 81, 0.00
11:46:01 PM, 11.20, 3097, -25.50, 393, 81, 0.00
11:46:01 PM, 11.20, 3097, -25.50, 393, 81, 0.00
11:46:01 PM, 11.20, 3161, -25.50, 393, 81, 0.00
11:46:01 PM, 11.20, 3148, -25.50, 393, 81, 0.00
11:46:01 PM, 11.10, 3122, -25.50, 393, 81, 0.00
11:46:01 PM, 11.00, 3148, -25.50, 393, 81, 0.00
11:46:01 PM, 11.00, 3174, -25.50, 393, 81, 0.00
11:46:01 PM, 10.90, 3187, -25.50, 393, 81, 0.00
11:46:01 PM, 10.90, 3187, -25.50, 393, 82, 0.00
11:46:01 PM, 10.90, 3213, -25.50, 393, 82, 0.00
11:46:01 PM, 10.80, 3227, -25.50, 393, 82, 0.00
11:46:01 PM, 10.80, 3213, -25.50, 393, 82, 0.00
11:46:01 PM, 10.80, 3187, -25.50, 393, 82, 0.00
11:46:01 PM, 10.80, 3241, -25.50, 393, 82, 0.00
11:46:01 PM, 10.70, 3174, -25.50, 393, 82, 0.00
11:46:01 PM, 10.70, 3241, -25.50, 393, 82, 0.00
11:46:01 PM, 10.70, 3310, -25.50, 393, 82, 0.00
11:46:01 PM, 10.70, 3254, -25.50, 393, 82, 0.00
11:46:01 PM, 10.70, 3282, -25.50, 393, 82, 0.00
11:46:01 PM, 10.70, 3296, -25.50, 393, 82, 0.00
11:46:01 PM, 10.70, 3213, -25.50, 393, 82, 0.00
11:46:01 PM, 10.70, 3339, -25.50, 393, 82, 0.00
11:46:01 PM, 10.70, 3339, -25.50, 393, 82, 0.00
11:46:01 PM, 10.70, 3254, -25.50, 393, 82, 0.00
11:46:01 PM, 10.70, 3310, -25.50, 393, 82, 0.00
11:46:01 PM, 10.70, 3282, -25.50, 393, 82, 0.00
11:46:01 PM, 10.70, 3368, -25.50, 393, 82, 0.00
11:46:01 PM, 10.80, 3368, -25.50, 393, 82, 0.00
11:46:01 PM, 10.80, 3296, -25.50, 393, 82, 0.00
11:46:01 PM, 10.80, 3398, -25.50, 393, 82, 0.00
11:46:01 PM, 10.90, 3383, -25.50, 393, 82, 0.00
11:46:01 PM, 10.90, 3383, -25.50, 393, 82, 0.00
11:46:01 PM, 10.90, 3413, -25.50, 393, 82, 0.00
11:46:02 PM, 11.00, 3444, -25.50, 393, 82, 0.00
11:46:02 PM, 11.00, 3429, -25.50, 393, 82, 0.00
11:46:02 PM, 10.90, 3398, -25.50, 393, 82, 0.00
11:46:02 PM, 11.00, 3556, -25.50, 393, 82, 0.00
11:46:02 PM, 11.00, 3459, -25.50, 393, 82, 0.00
11:46:02 PM, 11.00, 3413, -25.50, 393, 82, 0.00
11:46:02 PM, 11.00, 3539, -25.50, 393, 82, 0.00
11:46:02 PM, 11.10, 3368, -25.50, 393, 82, 0.00
11:46:02 PM, 11.10, 3398, -25.50, 393, 82, 0.00
11:46:02 PM, 11.00, 3572, -25.50, 393, 82, 0.00
11:46:02 PM, 11.00, 3429, -25.50, 393, 82, 0.00
11:46:02 PM, 11.00, 3444, -25.50, 393, 82, 0.00
11:46:02 PM, 11.10, 3589, -25.50, 393, 82, 0.00
11:46:02 PM, 11.10, 3572, -25.50, 393, 82, 0.00
11:46:02 PM, 11.10, 3539, -25.50, 393, 82, 0.00
11:46:02 PM, 11.10, 3523, -25.50, 393, 82, 0.00
11:46:02 PM, 11.10, 3589, -25.50, 393, 82, 0.00
11:46:02 PM, 11.10, 3606, -25.50, 393, 82, 0.00
11:46:02 PM, 11.10, 3539, -25.50, 393, 82, 0.00
11:46:02 PM, 11.10, 3556, -25.50, 393, 82, 0.00
11:46:02 PM, 11.10, 3539, -25.50, 393, 82, 0.00
11:46:02 PM, 11.10, 3692, -25.50, 393, 82, 0.00
11:46:02 PM, 11.10, 3640, -25.50, 393, 82, 0.00
11:46:02 PM, 11.10, 3606, -25.50, 393, 82, 0.00
11:46:02 PM, 11.10, 3640, -25.50, 393, 82, 0.00
11:46:02 PM, 11.10, 3692, -25.50, 393, 82, 0.00
11:46:02 PM, 11.20, 3675, -25.50, 393, 82, 0.00
11:46:02 PM, 11.20, 3640, -25.50, 393, 82, 0.00
11:46:02 PM, 11.20, 3606, -25.50, 393, 82, 0.00
11:46:02 PM, 11.20, 3657, -25.50, 393, 82, 0.00
11:46:02 PM, 11.20, 3623, -25.50, 393, 83, 0.00
11:46:02 PM, 11.20, 3692, -25.50, 393, 83, 0.00
11:46:02 PM, 11.20, 3657, -25.50, 393, 83, 0.00
11:46:02 PM, 11.20, 3746, -25.50, 393, 84, 0.00
11:46:02 PM, 11.20, 3765, -25.50, 393, 85, 0.00
11:46:02 PM, 11.30, 3783, -25.50, 393, 86, 0.00
11:46:02 PM, 11.30, 3692, -25.50, 393, 86, 0.00
11:46:02 PM, 11.30, 3692, -25.50, 393, 87, 0.00
11:46:02 PM, 11.30, 3765, -25.50, 393, 88, 0.00
11:46:02 PM, 11.30, 3821, -25.50, 393, 88, 0.00
11:46:02 PM, 11.30, 3765, -25.50, 393, 88, 0.00
11:46:02 PM, 11.30, 3728, -25.50, 393, 89, 0.00
11:46:02 PM, 11.30, 3821, -25.50, 393, 89, 0.00
11:46:02 PM, 11.30, 3918, -25.50, 393, 89, 0.00
11:46:02 PM, 11.30, 3821, -25.50, 393, 89, 0.00
11:46:02 PM, 11.30, 3802, -25.50, 393, 89, 0.00
11:46:02 PM, 11.30, 3859, -25.50, 393, 89, 0.00
11:46:02 PM, 11.30, 3979, -25.50, 393, 89, 0.00
11:46:02 PM, 11.30, 3840, -25.50, 393, 89, 0.00
11:46:02 PM, 11.30, 3879, -25.50, 393, 89, 0.00
11:46:02 PM, 11.30, 3859, -25.50, 393, 89, 0.00
11:46:02 PM, 11.30, 3959, -25.50, 393, 88, 0.00
11:46:02 PM, 11.30, 3918, -25.50, 393, 89, 0.00
11:46:02 PM, 11.30, 4000, -25.50, 393, 89, 0.00
11:46:02 PM, 11.30, 3898, -25.50, 393, 89, 0.00
11:46:02 PM, 11.20, 3898, -25.50, 393, 89, 0.00
11:46:02 PM, 11.20, 4042, -25.50, 393, 89, 0.00
11:46:02 PM, 11.20, 4000, -25.50, 393, 89, 0.00
11:46:02 PM, 11.30, 3938, -25.50, 393, 89, 0.00
11:46:02 PM, 11.30, 3959, -25.50, 393, 89, 0.00
11:46:02 PM, 11.30, 4000, -25.50, 393, 89, 0.00
11:46:02 PM, 11.30, 4151, -25.50, 393, 89, 0.00
11:46:02 PM, 11.30, 4064, -25.50, 393, 89, 0.00
11:46:02 PM, 11.30, 4085, -25.50, 393, 89, 0.00
11:46:02 PM, 11.30, 4085, -25.50, 393, 89, 0.00
11:46:03 PM, 11.30, 4021, -25.50, 393, 89, 0.00
11:46:03 PM, 11.30, 4107, -25.50, 393, 89, 0.00
11:46:03 PM, 11.40, 3938, -25.50, 393, 89, 0.00
11:46:03 PM, 11.30, 4042, -25.50, 393, 89, 0.00
11:46:03 PM, 11.30, 4042, -25.50, 393, 89, 0.00
11:46:03 PM, 11.30, 4174, -25.50, 393, 89, 0.00
11:46:03 PM, 11.40, 4151, -25.50, 393, 89, 0.00
11:46:03 PM, 11.40, 4174, -25.50, 393, 88, 0.00
11:46:03 PM, 11.40, 4085, -25.50, 393, 89, 0.00
11:46:03 PM, 11.40, 4021, -25.50, 393, 88, 0.00
11:46:03 PM, 11.40, 4129, -25.50, 393, 88, 0.00
11:46:03 PM, 11.50, 4021, -25.50, 393, 88, 0.00
11:46:03 PM, 11.50, 4174, -25.50, 393, 88, 0.00
11:46:03 PM, 11.50, 4085, -25.50, 393, 88, 0.00
11:46:03 PM, 11.40, 4267, -25.50, 393, 88, 0.00
11:46:03 PM, 11.40, 4291, -25.50, 393, 88, 0.00
11:46:03 PM, 11.40, 4129, -25.50, 393, 89, 0.00
11:46:03 PM, 11.50, 4389, -25.50, 393, 88, 0.00
11:46:03 PM, 11.50, 4174, -25.50, 393, 89, 0.00
11:46:03 PM, 11.50, 4291, -25.50, 393, 89, 0.00
11:46:03 PM, 11.50, 4151, -25.50, 393, 88, 0.00
11:46:03 PM, 11.50, 4085, -25.50, 393, 88, 0.00
11:46:03 PM, 11.50, 4197, -25.50, 393, 88, 0.00
11:46:03 PM, 11.50, 4267, -25.50, 393, 89, 0.00
11:46:03 PM, 11.40, 4220, -25.50, 393, 89, 0.00
11:46:03 PM, 11.40, 4315, -25.50, 393, 88, 0.00
11:46:03 PM, 11.40, 4220, -25.50, 393, 89, 0.00
11:46:03 PM, 11.40, 4267, -25.50, 393, 88, 0.00
11:46:03 PM, 11.40, 4291, -25.50, 393, 88, 0.00
11:46:03 PM, 11.40, 4315, -25.50, 393, 89, 0.00
11:46:03 PM, 11.50, 4339, -25.50, 393, 88, 0.00
11:46:03 PM, 11.50, 4465, -25.50, 393, 88, 0.00
11:46:03 PM, 11.50, 4174, -25.50, 393, 89, 0.00
11:46:03 PM, 11.50, 4151, -25.50, 393, 88, 0.00
11:46:03 PM, 11.50, 4389, -25.50, 393, 88, 0.00
11:46:03 PM, 11.50, 4197, -25.50, 393, 88, 0.00
11:46:03 PM, 11.50, 4315, -25.50, 393, 88, 0.00
11:46:03 PM, 11.50, 4439, -25.50, 393, 88, 0.00
11:46:03 PM, 11.50, 4389, -25.50, 393, 89, 0.00
11:46:03 PM, 11.40, 4389, -25.50, 393, 88, 0.00
11:46:03 PM, 11.40, 4339, -25.50, 393, 88, 0.00
11:46:03 PM, 11.40, 4291, -25.50, 393, 88, 0.00
11:46:03 PM, 11.40, 4414, -25.50, 393, 88, 0.00
11:46:03 PM, 11.40, 4544, -25.50, 393, 88, 0.00
11:46:03 PM, 11.40, 4518, -25.50, 393, 88, 0.00
11:46:03 PM, 11.40, 4439, -25.50, 393, 89, 0.00
11:46:03 PM, 11.30, 4315, -25.50, 393, 88, 0.00
11:46:03 PM, 11.40, 4315, -25.50, 393, 88, 0.00
11:46:03 PM, 11.40, 4339, -25.50, 393, 89, 0.00
11:46:03 PM, 11.40, 4315, -25.50, 393, 88, 0.00
11:46:03 PM, 11.40, 4544, -25.50, 393, 88, 0.00
11:46:03 PM, 11.40, 4491, -25.50, 393, 88, 0.00
11:46:03 PM, 11.40, 4414, -25.50, 393, 89, 0.00
11:46:03 PM, 11.40, 4518, -25.50, 393, 88, 0.00
11:46:03 PM, 11.40, 4518, -25.50, 393, 88, 0.00
11:46:03 PM, 11.50, 4627, -25.50, 393, 88, 0.00
11:46:03 PM, 11.50, 4571, -25.50, 393, 88, 0.00
11:46:03 PM, 11.50, 4518, -25.50, 393, 88, 0.00
11:46:03 PM, 11.50, 4518, -25.50, 393, 88, 0.00
11:46:03 PM, 11.50, 4683, -25.50, 393, 88, 0.00
11:46:03 PM, 11.50, 4627, -25.50, 393, 88, 0.00
11:46:03 PM, 11.50, 4465, -25.50, 393, 88, 0.00
11:46:03 PM, 11.50, 4655, -25.50, 393, 88, 0.00
11:46:03 PM, 11.50, 4599, -25.50, 393, 89, 0.00
11:46:03 PM, 11.50, 4571, -25.50, 393, 88, 0.00
11:46:03 PM, 11.50, 4491, -25.50, 393, 88, 0.00
11:46:04 PM, 11.50, 4599, -25.50, 393, 88, 0.00
11:46:04 PM, 11.50, 4683, -25.50, 393, 88, 0.00
11:46:04 PM, 11.50, 4655, -25.50, 393, 89, 0.00
11:46:04 PM, 11.50, 4712, -25.50, 393, 88, 0.00
11:46:04 PM, 11.50, 4712, -25.50, 393, 88, 0.00
11:46:04 PM, 11.50, 4491, -25.50, 393, 88, 0.00
11:46:04 PM, 11.50, 4712, -25.50, 393, 88, 0.00
11:46:04 PM, 11.50, 4712, -25.50, 393, 89, 0.00
11:46:04 PM, 11.50, 4655, -25.50, 393, 88, 0.00
11:46:04 PM, 11.50, 4712, -25.50, 393, 88, 0.00
11:46:04 PM, 11.50, 4655, -25.50, 393, 88, 0.00
11:46:04 PM, 11.50, 4741, -25.50, 393, 88, 0.00
11:46:04 PM, 11.50, 4861, -25.50, 393, 89, 0.00
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11:46:07 PM, 11.20, 6508, -25.50, 393, 85, 0.00

 

[isnms]

You indicated to me:

BTW, my adjustments are in the -15 to -28 range

and that prompted my caution.

I know I've seen it mention in several threads, but here is one I found:
http://www.supramania.com/forums/showthread.php?t=27287

Very quick run down:

At WOT, I would say generally 10.5 is where the stock ECU likes to be. 11.5 is a safe tune. 12.0 is a good performance tune. 12.5 is getting quite risky. 13.0 is not good. At WOT, the ECU ignores sensor inputs (open loop), so it isn't compensating. That's why you can tune with the S-AFC. At idle you should see ~14.7, cruising will vary across the board because of ECU control, throttle postion and other variables. The stock ECU retards timing sharply at ~5,600RPM so SAFC tuning anything above 5,600RPM is relatively pointless.

SAFC advances timing as it pulls fuel due to the nature of dinking with the AFM frequency to trick the ECU into thinking that it's flowing less air, so it puts in less fuel, and puts in more timing advance. Basic SAFC 101. This is a good thing, and a bad thing. More timing + less fuel = more power BUT too much timing and not enough fuel are very bad. You probably have no way of knowing what your timing is once you're running, so set your base timing at 8-10 (for safety) and try not to advance the S-AFC farther than -20%. What you are doing is adjusting fuel while reducing the risk of over advancing timing (which can cause detonation). If you must go farther than -20%, then set all back to 0% and reduce fuel pressure to lean your motor.

You can go lower than -20%, but *I* prefer to try to keep the S-AFC as close to 0% as possible while maintaining proper AFR. You can always add timing later by increasing your base timing. While good in principal, I usually end up in the -18% range at the upper RPM. :icon_conf

The S-AFC is a TRIMMING TOOL, intended to FINE TUNE the fuel curve. It's not intended to be tweaked out -40%... Once you get your fuel dialed in, you can advance your timing a bit. Detonation is not your friend.

Disclaimer - All this assumes reasonable engine condition - boost levels - fuel and supporting mods... It's best to do this on a dyno, and with a professional overseeing your work. If you blow up your engine after reading this, it still 100% your fault. :biglaugh:

base timing = timing as set by rotating the CPS with the diagnosic jumpered properly. See the TSRM for how to set your timing.

The SAFC is a generic piggyback that can go from -50 to +50 HOWEVER it is intended to be used as a FINE TUNER. It doesn't have the flexability of a standalone. The closer to -50% you are, the more you are advancing timing, and the less fuel you are putting in. Until the maftpro, there was really no good way to know how much you are advancing timing with any SAFC type piggy back. Under -25% has been *my* safe number (-20% target) that I've seen and used over the years.

Sure you can go higher (lower?), but at any amount of SAFC correction you have no idea how much you are affecting timing. Since timing advance (detonation) under WOT is an unknown and potentially engine destroying factor, it's better to play it safe and eliminate/reduce timing as a factor. You do this two ways. Reduce your base timing, reduce the amount of timing the SAFC is putting in.

To put it another way - Assume you are tuned for a 11.5:1 AFR on your wideband (very hypothetical - as in I'm making these numbers up):

Your way:
SAFC average = -40% | base fp = 43psi | base timing = 8
You are over correcting with the SAFC for a high base fuel pressure and have to run a low base timing to prevent detonation at WOT. At lower RPM and cruising you have retarded timing and generally crappy engine performance. You run rich at idle, and the ECU will likely have a hard time controlling the mixture (Look up Vf)

My suggestion:
SAFC average = -15% | base fp = 23psi | timing = 12
Your base settings are close to nuetral, with a bit more timing. The advanced timing gives more power and helps the turbo spool. Having a higher advanced base timing = more power across the whole RPM range.

Speaking generally, again. Some of the above would be skewed by other factors but I'm discussing within the circle of what you have control over. Set up your car to run well with the SAFC set to 0% across the board. Adjust your fuel pressure to get a reasonable idle and AFR. Set your timing a bit retarded to give a margin of error. Tune your fuel w/ SAFC. Then advance your timing SLOWLY. If you don't have an AFPR, then look at buying one because it should come before the SAFC.

 

[IwantMKIII]

awesome ISNMS, thanks again! You've been very helpful through this process along with your write ups. I tried searchign for things like you posted but came up empty handed. Lots of good info up there!

My original changes were in the high -20's but i adjusted a bit more and got them closer to -20%.

I will try lowering a FP a bit and see how that works...its currently about 38PSI, i just don't want to back out that screw in the aeromotive FPR, it seems like it will fall out soon its backed out so much.

 

[bountykilla0118]

Are you on 440's or 550's ? For 550's 27(+/-) to mid 30's is a pretty good range for the AFPR.....