21. Try to discover relationship between friction and damper - FFB steer friction coefficient="0.13888" - FFB steer damper coefficient="0.13888" 21.1 Change Friction=0.0, Leave Damper=0.13888 - Easier to turn wheel, harder to catch oversteer 21.2 Change Friction=0.13888, Change Damper=0.0 - Felt like friction was back on, as expected, but couldn't feel what difference damper made. 21.3 Leave Friction=0.13888, Change Damper=0.27776 - Felt damper, oversteer easier to catch 21.4 Leave Friction=0.13888, Change Damper=0.55552 - Definitely felt over dampered 21.5 Leave Friction=0.13888, Change Damper=0.41664 - Better, a little too much sometimes 21.6 Leave Friction=0.13888, Change Damper=0.3472 - Too much in oversteer cases 21.7 Leave Friction=0.13888, Change Damper=0.31248 - Wheel spins back too quickly on oversteer correction 21.8 Leave Friction=0.13888, Change Damper=0.32984 - Damper feels okay, feel like I need more friction 21.9 Change Friction=0.13889, Leave Damper=0.32984 - Not feeling backend too far out, like wheel doesn't self-align fast enough 21.10 Leave Friction=0.13889, Change Damper=0.32116 - Slightly too quick wheel spin in oversteer cases 21.11 Leave Friction=0.13889, Change Damper=0.3255 20. Try a little more friction/damper to reduce 'wheel energy' FFB steer friction coefficient="0.13885", 0.13886, 0.13888 FFB steer damper coefficient="0.13885", 0.13886, 0.13888 19. Another baseline experiment tuning for grip loss wheel weight like Step #18 FFB steer force grip factor="0.98847", 1.0, 0.99999 ^ Continued from Step #18 FFB steer force grip weight="0.50583", >>>Inverse Search>>> 0.0, 0.00001, 0.00003, 0.00007, 0.00015, 0.00031, 0.00063, 0.00127, 0.00255, 0.00511, 0.01023, 0.02047, 0.04095, 0.08191, 0.16383, 0.32767 [can finally feel it; choice critical] >>>Regular Search>>> 0.24575, 0.28671 [important choice], 0.30719, 0.31743 [unsure; test more] ^ Continued from Step #18 FFB rumble strip magnitude="0.00547", 0.0 ^ Continued from Step #17 18. Grip Factor tuning regarding exagerated grip loss wheel weight FFB steer force grip factor="0.98836" >>Inverse Search>> 0.98837, 0.98839, 0.98843, 0.98851 >>Regular Search>> 0.98847, 0.98849, 0.98848, 0.98847 >>Experiment>> 1.0 ^ Continued from Step #15 ^ I feel like Grip Factor is causing exagerated grip loss wheel weight so I want to reduce its effect FFB steer force grip weight="0.50598", 0.50597, 0.50595, 0.50591, 0.50583 ^ Continued from Step #17 ^ I wanted to gain more feeling of road grip. The wheel was becoming too light under cornering grip loss. 17. Misc tuning, mostly about understeer grip loss wheel weight feeling FFB steer force grip weight="0.50614", 0.506060625, 0.5060209375, 0.50600109375, 0.505991171875, 0.5059862109375, 0.50598373046875 ^ Continued from Step #15 FFB rumble strip magnitude="0.0109375", 0.00546875 ^ Continued from Step #5 FFB rumble strip pull factor="-0.89063", 0.89063, 3.0, 1.5 ^ Continued from Step #5 ^ Trying to figure out if push/pull of kerbs is right or wrong. I feel ike it's pulling me off track but shouldn't be. 16. Experiment: Try for AMS/RF2 feel from Julien Regnard's FFB Guide "3. Tweaking FFB parameters" strategy FFB Effects Level="1", 2 FFB Gain="1.00000" FFB steer force exponent="1.00000" FFB steer force grip weight="0.00000", 0.50613875 FFB steer force grip factor="1.00000" FFB steer friction coefficient="0.00000", 0.13885 FFB steer friction saturation="1.00000" FFB steer damper coefficient="0.00000", 0.13885 FFB steer damper saturation="1.00000" Observations: 1. A little bit like AMS/RF2 but "dumb". Mass transfer is there but not as pronounced as AMS/RF2. No feeling of bumps on road (probably need Grip Weight). Backend feeling felt okay. Need friction and damper. 2. Add friction and damper from Step #15 (requires Effects Level 2): Surprisingly somewhat better road and cornering feel. Not sure why, maybe due to Effects Level 2. A little better than #1's numb road feeling. 3. Add in some Grip Weight from Step #15 to enhance road feeling: ... Conclusion: Okay, didn't really ever feel nearly as good as AMS/RF2 but worth an experiment. Going back to Step #15's settings. 15. Add in some friction/damper, feels too loose on understeer/oversteer snap-back FFB steer friction coefficient="0.10135", 0.11135, 0.10635, 0.10885, 0.11885, 0.13885 FFB steer damper coefficient="0.10135", 0.11135, 0.10635, 0.10885, 0.11885, 0.13885 FFB steer force grip factor="0.99086", 0.98836 FFB steer force grip weight="0.53567", 0.52567, 0.50567, 0.51567, 0.51067, 0.50817, 0.50692, 0.506295, 0.5059825, 0.50613875 14. Gain back Step #12's reduced Grip Weight FFB steer force grip weight="0.46567", 0.47567, 0.49567, 0.53567 FFB steer force grip factor="0.99586", 0.98586, 0.99086 13. Try Grip Factor=1.0 to eliminate backend grip affecting wheel weight ^ Wheel will still turn for as backend steps out so don't need it affecting wheel weight FFB steer force grip factor="0.94530", 1.0, 0.99, 0.995, 0.9975, 0.99625, 0.995625, 0.9959375, 0.99578125, 0.995859375 12. Reduce 'too much wheel weight loss' on cornering FFB steer force grip weight="0.58012", 0.57012, 0.55012, 0.51012, 0.43012, 0.47012, 0.45012, 0.46012, 0.46512, 0.46762, 0.46637, 0.465745, 0.4654325, 0.46558875, 0.465666875 11. Force Exponent Experimenting Goal: Trying to achieve more sine-like forces on road bumps FFB steer force exponent="1.00000", 1.25, 1.125, 1.0625, 1.03125, 1.015625, 1.0234375, 1.01953125 10. iRacing-like Friction/Damper FFB steer friction coefficient="0.01707", 0.03414, 0.06828, 0.13656, 0.27312, 0.20484, 0.23898, 0.22191, 0.213375, 0.2091075 // 0.1707, 0.08535, 0.128025, 0.1066875, 0.09601875, 0.101353125 FFB steer damper coefficient="0.01707", 0.03414, 0.06828, 0.13656, 0.27312, 0.20484, 0.1707, 0.15363, 0.145095, 0.1493625 // 0.1707, 0.08535, 0.128025, 0.1066875, 0.09601875, 0.101353125 9. 50/50 Baseline Ordered Bi-section Search: Car and Track: HQ F575 GTC at Donnington, Dry, 24C Track, 17C Ambient 50/50 Baseline Values: FFB Effects Level="3" FFB Gain="1.00000" FFB steer force exponent="1.00000" FFB steer force grip weight="0.50000" FFB steer force grip factor="0.50000" FFB steer friction coefficient="0.00000" FFB steer damper coefficient="0.00000" Ordered Bi-section Search: 1. FFB steer friction coefficient="0.00000", 1.0, 0.5, 0.25, 0.125, 0.0625, 0.03125, 0.015625, 0.0078125, 0.015625 // Friction and Damper now in sync // 0.0234375, 0.01953125, 0.017578125, 0.0166015625, 0.01708984375, 0.016845703125, 0.0169677734375, 0.01702880859375, 0.017059326171875, 0.0170745849609375 2. FFB steer damper coefficient="0.00000", 1.0, 0.5, 0.25, 0.125, 0.0625, 0.03125, 0.015625, 0.0078125, 0.015625 // Friction and Damper now in sync // 0.0234375, 0.01953125, 0.017578125, 0.0166015625, 0.01708984375, 0.016845703125, 0.0169677734375, 0.01702880859375, 0.017059326171875, 0.0170745849609375 3. FFB steer force grip factor="0.50000", 1.0, 0.75, 0.875, 1.0, 0.9375, 0.90625, 0.921875, 0.93359375, 0.939453125, 0.9423828125, 0.94384765625, 0.944580078125, 0.9449462890625, 0.94512939453125, 0.945220947265625, 0.9452667236328125, 0.9452896118164062, 0.9453010559082031 4. FFB steer force grip weight="0.50000", 1.0, 0.75, 0.625, 0.5625, 0.59375, 0.578125, 0.5859375, 0.58203125, 0.580078125, 0.5810546875, 0.58056640625, 0.580322265625, 0.5802001953125, 0.58013916015625, 0.580108642578125, 0.5801239013671875 5. FFB steer force exponent="1.00000" 8. SCRATCH: Grip Factor bi-section search to balance out #7's Grip Weight bi-section search Scratch: This didn't work because Grip Weight was previously tuned directly to Grip Factor so changing Grip Factor changes how Grip Weight feels. FFB steer force grip factor="0.74355", 0.0, 1.0, 0.5, 0.75, 0.625, 0.6875, 0.71875, 0.703125, 0.7109375, 0.71484375 ^ Do a full bi-section search 0.0-1.0 to avoid previous value bias ^ Wheel too light on front grip wheel loss? Decrease Grip Factor ^ Wheel too light on rear grip wheel loss? Increase Grip Factor 7. Baseline + 50/50 + grip loss + friction/damper + grip weight + exponent + ai tweak FFB steer force exponent="1.00000", 1.25, 1.125 (ok), (1.0625 better, 1.1875 worse) ^ Adjust how quickly/severe grip loss is felt. 1.0 feels like grip loss comes on too quickly in the ffb, like there's no progression. Above 1.0 smooths it out so if there's small grip loss than you feel small wheel weight loss not a sharp drop in wheel weight. This needs to be kept in balanced with Grip Weight as it can change the way the current Grip Weight value feels (although Grip Weight adjustment should be relatively minimal). FFB steer force grip weight="0.78000", 0.785, 0.7875, 0.6875, 0.7875, 0.6875, 0.7375, 0.7125, 0.725, 0.71875, 0.715625, 0.7171875 (better), 0.71640625, 0.716796875, 0.7169921875, 0.71689453125, 0.716943359375, (0.7169189453125+ vs 0.7169677734375++), 0.71695556640625 FFB steer force grip factor="0.50000", 0.6, 0.7, 0.65, 0.7, 0.8 (ok), 0.9, 1.0, 0.8, 0.7, 0.75 (good), (0.725- vs 0.775--), 0.7375, 0.74375, 0.740625, 0.7421875, 0.74296875, 0.743359375, 0.7435546875 ^ Balance Grip Weight after adjusting. More Grip Factor speeds up grip loss affect FFB steer friction coefficient="0.00000", 0.175 (default), 0.0875 (ok), 0.04375, 0.065625, 0.0546875, 0.04921875 ^ Balance Grip Weight after adjusting. More friction can 'slow down' grip loss effect. FFB steer friction saturation="1.00000" FFB steer damper coefficient="0.00000", 0.175 (default), 0.0875 (ok), 0.04375, 0.065625, 0.0546875, 0.04921875 ^ Balance Grip Weight after adjusting. More damper can 'slow down' grip loss effect. FFB steer damper saturation="1.00000" AI to AI Collision Rate="23", 32, 40 6. Baseline + 50/50 + more understeer feeling (loss of grip) FFB steer force exponent="1.00000", 2.0, 1.5, 1.25 (okay), 1.0 (baseline) FFB steer force grip weight="0.50000", 0.51, 0.53, 0.50 (baseline), 0.57, 0.65, 0.81, 0.73, (0.69, 0.77*), 0.79, 0.78 FFB steer force grip factor="0.50000", 0.51, 0.53, 0.57, 0.65, 0.5 (baseline) AI to AI Collision Rate="20", 32 (fps loss), 26, 23 5. Tune rumble strips FFB rumble strip magnitude="0.021875", 0.175, 0.0875, 0.04375, XP:0.35000 (default value), XP:0.01, 0.021875, 0.0109375 FFB rumble strip freq mult="0.60000", 0.1, 0.6 (default value) FFB rumble strip wave type="0" FFB rumble strip pull factor="-0.89063" FFB rumble strip update thresh="0.07500", 0.0, 0.075 (default value) 4. Try again with Baseline + 50/50 grip weight and grip factor parameters FFB Effects Level="1" FFB Gain="1.00000" FFB steer force exponent="1.00000" FFB steer force grip weight="0.50000" FFB steer force grip factor="0.50000" FFB steer friction coefficient="0.00000" FFB steer friction saturation="1.00000" FFB steer damper coefficient="0.00000" FFB steer damper saturation="1.00000" 3. Trying to find more 'feel' after #2 "Starting from FFB_Guide.txt" FFB Effects Level="1", 2, 3 FFB Gain="1.00000" FFB steer force exponent="1.00000" FFB steer force grip weight="0.39160625", 0.78322, 0.587413125, 0.78322, 0.6853165625, 0.63636484375, 0.611888984375, 0.6241269140625; FFB steer force grip factor="0.2" FFB steer friction coefficient="0.00000", 1, 0.5, 0.25, 0.125, 0.0625, 0.03125, 0.046875 FFB steer friction saturation="1.00000" FFB steer damper coefficient="0.00000", 1.0, 0.5, 0.25, 0.125, 0.0625, 0.03125, 0.015625, 0.0234375 FFB steer damper saturation="1.00000" FFB steer force average weight="0.65625", 1.0, 0.65625 2. Starting from FFB_GUIDE.txt... FFB Effects Level="1" FFB Gain="1.00000" FFB steer force exponent="1.00000" FFB steer force grip weight="0.00000", 0.5, 0.25, 0.375 (OK), 0.4375, 0.40625, 0.39063, 0.39844, 0.394535, 0.3925825, 0.39160625 FFB steer force grip factor="1.00000", 0.0, 0.5, (XP: 0.25*, 0.75), 0.375, 0.3125, 0.28125, 0.265625, 0.2578125, 0.26171875, 0.259765625, 0.2587890625, (XP: 0.2) FFB steer friction coefficient="0.00000", 1.0, 0.5, 0.25, 0.17500 (default value) FFB steer friction saturation="1.00000" FFB steer damper coefficient="0.00000", 1.0, 0.5, 0.25, 0.17500 (default value) FFB steer damper saturation="1.00000" 1. Starting from defaults... FFB steer force average weight="0.60000", 0.28; 0.60, 1.0, 0.5, 0.75, 0.625, 0.6875, 0.65625 FFB steer force exponent="0.80000", 0.4. 0.6, 0.7, 0.65; 0.8, 0.75 FFB steer force grip weight="0.90000", 0.45, 0.675, 0.5625, 0.61875, 0.646875, 0.6328125 // 0.61875, 0.5625, 0.45, 0.50625, 0.478125, 0.4640625, 0.45703125, 0.460546875, 0.2302734375, 0.34541015625, 0.402978515625, 0.3741943359375 (doable), 0.38858642578125, 0.395782470703125, 0.3921844482421875 FFB steer force grip factor="0.60000", 1.0, 0.1, 0.55 (good), 0.775, 0.8875 (good too), 1.0 (good; recommended); 0, 0.5 FFB rumble strip pull factor="1.50000", -1.5, -0.75, -1.125, -0.9375, -0.84375, -0.890625 FFB steer friction coefficient="0.17500", -0.2 (oscillating), 0.2 (way too much), 0.175 FFB steer damper coefficient="0.17500" 0.2, 0.175