Assetto Corsa Car Modding Worksheet v0.16

Transcription

1 Assetto Corsa Car Modding Worksheet v0.16 by: Storm Rider Special Thanks to Pankykapus Credits: Pankykapus, Andrea Lojelo, Avoletta, Stereo Bibliography: How to make your car handle, Fred Puhn Tune to Win, Carroll Smith Speed Secrets, Ross Bentley Shock Absorber Handbook, John Dixon Eibach Suspension Worksheet NASIOC = Formulas. Do not edit unless you already have the right value! = Required Input which are used in other formulas. = Choose and input only one, the other will be calculated. = Analysis Results, DO NOT EDIT! = Optional = Enter values here! = Background Calculation. DO NOT EDIT!

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3 a. 2b

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5 General Instructions Choose either the N/A Engine or Turbo Engine Use the recommended website to generate the basic Tires and Wheels data. If you want to help improve this worksheet, by providing feedback, suggestions or if you find errors, please contact me at Assetto Corsa Official Support Forums: Index Dimensions N/A Engine Turbo Engine Tires & Wheels Drivetrain Suspension Electronics

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13 WIP 1997 Impreza STI version IV Tyres Wheels OEM lb 1998 Impreza 22b Tyres Wheels BBS lb 2002 Impreza STI version VII Rev.B Tyres Wheels OEM lb BBS lb Front lb kg tires- 22 lbs wheels lugs dust shields rotor caliper knuckle/hub axle control arm strut assembly Rear lb kg tires wheel lugs knuckle/hub

14 rotor caliper lateral links-7 (both) trailing link axle strut assembly

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17 2a. N/A ENGINE 2a.1- BASIC INFORMATION 2a.1.1- ENGINE DATA Value 1- ALTITUDE_SENSITIVITY ENGINE INERTIA LIMITER RPM LIMITER_HZ MINIMUM RPM a.1.2- COAST_REF Value RPM 8000 TORQUE 120 NON_LINEARITY 0.0 2a.2- TORQUE CALCULATIONS 2a.2.1- TORQUE CURVE RPM Torque Engine (kp) Torque Engine (ft-lb) , ,

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19 Instructions Input the Basic Information on the left. You can replace the torque picture on the bottom left with your car s dyno graph picture Input the torque values, either in kp, ft-lb or NM and adjust the drivetrain loss if needed Torque curve should never start with 0NM of Torque but should end at 0 at max revv (no Torque Engine (NM) HP Drivetrain Loss (%) T=T./ (1+boost) (NM) Copy this power.lut column and Special Paste "Values" % % % % % % % 1, % 1, % 1, % 1, % 1, ,069 15% 1, ,074 15% 1, ,091 15% 1, % % % % % % % % % %

20 0-15% % % % % % % % % % % % %

21 e so its easy to see. d. The formula will generate a power.lut ot Limiter revv) 1,600 1,400 1,200 1,0451,0761,1071,1371,1561,174 1, ,069 1,014 1,074 1,091 1, HP T=T./ (1+boost) (NM)

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23 Torque Engine (NM)

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29 2b. TURBO ENGINE 2.1- BASIC INFORMATION 2b.1.1- ENGINE DATA Value ALTITUDE_SENSITIVITY ENGINE INERTIA LIMITER RPM 8000 LIMITER_HZ 18 MINIMUM RPM 850 2b.1.2- COAST_REF Value RPM 8000 TORQUE 120 NON_LINEARITY 0.0 2b.1.3- [TURBO_0] Value LAG_DN 0.99 Calculator LAG_UP from (psi) MAX_BOOST WASTEGATE 1.90 to (bar) DISPLAY_MAX_BOOST REFERENCE_RPM 3000 GAMMA 2.5 COCKPIT_ADJUSTABLE 1 2b.1.4- [TURBO_1] Value LAG_DN 0.99 Calculator LAG_UP from (psi) MAX_BOOST WASTEGATE 0.00 to (bar) DISPLAY_MAX_BOOST REFERENCE_RPM 3000 GAMMA 4.0 COCKPIT_ADJUSTABLE 1 2a.2- TORQUE CALCULATIONS 2b.2.1- TORQUE CURVE

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33 [TURBO_0] [TURBO_1] RPM Max Boost Wastegate RPM Max Boost Wastegate RPM Torque Engine (kp) Torque Engine (ft-lb) Torque Engine (NM) HP Total Boost (bar)

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37 [TOTAL] 1- RPM Max Boost Wastegate Total Boost (NM) Drivetrain Loss (%) T=T./ (1+boost) (NM) Copy this and Special Paste "Values" here % % %

38 % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % %

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41 Instructions Input the Basic Information on the left. The Boost will be calculated automatically. If your car has only one turbo, leave both the Turbo_1 boost values (max_boost and wastegate) = 0 Its recommended to start modeling the Turbo without the Wastegate, so you can match ingame, by tr You can replace the torque picture on the bottom left with your car s dyno graph picture so its easy to Input the torque values, either in kp, ft-lb or NM and adjust the drivetrain loss if needed. The formula Adjust the Gamma value, so the initial boost curve matches the real car and fine tune your torque cu Torque curve should never start with 0NM of Torque but should end at 0 at max revv (not Limiter revv Max Boost

42 Torque Engine (NM)

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45 hat its max boost is at the expected RPM rve and will generate a power.lut

46 l Boost (NM) 312 Torque 307 AC

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53 3. TIRES & WHEELS USE THIS FIRST: 1- WHEELS Description Diameter (in) FRONT BBS (17x8.5) 17 REAR BBS (18x8.5) TIRES Description Width (mm) FRONT Bridgestone Potenza RE040 (225/45R 17) 235 REAR Bridgestone Potenza RE040 (225/45R 17) INERTIAS Description FRONT I1=Rotational Inertia 1, uniform density disk I2=Rotational Inertia 2, Tire+wheel I3=Rotational Inertia 3, Tire+wheel, edge weighted

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55 Width (in) Offset (mm) Weight (lb) Weight (kg) Backspace (mm) Aspect Ratio Rim (in) Diameter (mm) Weight (lb) Weight (kg) Max Psi REAR

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57 F R Wheel Radius (feet) Tire sidewall height (feet) Tire radius (feet) Tire Circumference (feet) wheel mass (slugs) tire mass (slugs) total mass (slugs)

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61 WIP Clutch 500 NM Electronic Center Dif w/ Manual Lock (DCCD) Min F:R Max F:R Front Dif Rear Dif 45% Lock 45% Lock Gears km/h km/h km/h km/h km/h F 4,44:1

62 3. SUSPENSION 1- GEOMETRY 2- SPRINGS 2.1- WEIGHTS 2.2- UNSPRUNG WEIGHTS 2.3- SPRUNG WEIGHTS Front Ride Height Rear Ride Height Front BaseY Rear BaseY Wheelbase Front Track (AC) Rear Track (AC) Front Tire Width Rear Tire Width Total Weight Weight Distribuition Front Weight Rear Weight Front HUB_MASS Rear HUB_MASS Front Sprung Weight Rear Sprung Weight Total Sprung Weight 2.4- FRONT SPRINGS Calculator HP-12c Front Spring Rate (SR) from (lb/in) from (kp/mm) Arm Length D Leverage Length D1 to (NM) to (NM) Correction Angle (ACF) 43, , Front Motion Ratio (MR) Front Wheel Rate 2.5- REAR SPRINGS Calculator HP-12c Rear Spring Rate from (lb/in) from (kp/mm) Arm Length D Leverage Length D1 to (NM) to (NM) Correction Angle (ACF) 61, , Front Motion Ratio (MR) Rear Wheel Rate 2.6- FRONT ARBs (Solid bar) I = Length A

63 J = Length B Calculator HP-12c Length C from (mm) from (kp/mm) Diameter Front ARB Spring Rate to (in) to (NM) Front ARB Spring Rate , ARB Efective Lenght ARB Installation Angle Motion Ratio Front ARB Wheel Rate 2.7- REAR ARBs (Solid bar) I = Length A J = Length B Calculator HP-12c Length C from (mm) from (kp/mm) Diameter Front ARB Spring Rate to (in) to (NM) Front ARB Spring Rate , ARB Efective Lenght ARB Installation Angle Motion Ratio Rear ARB Wheel Rate 2.8- ANALYSIS Front Suspension Freq Rear Suspension Freq Front Sprung/ Unsprung Ratio Rear Sprung/ Unsprung Ratio Car Sprung/ Unsprung Ratio 3- SHOCK ABSORBERS 3.1- OPTIMUM FRONT DAMPERS Calculator Critical Damping from (in/s) mm/s SLOW BUMP mm/s FAST BUMP

64 to (m/s) mm/s SLOW REBOUND mm/s FAST REBOUND 3.2- OPTIMUM REAR DAMPERS Calculator Critical Damping from (in/s) mm/s SLOW BUMP mm/s FAST BUMP to (m/s) mm/s SLOW REBOUND mm/s FAST REBOUND 3.3- FRONT DAMPERS (MANUAL INPUT) Calculator Critical Damping from (in/s) m/s Fast Bump Threshold mm/s SLOW BUMP to (m/s) 150+mm/s FAST BUMP m/s Fast Rebound Threshold mm/s SLOW REBOUND 150+mm/s FAST REBOUND 3.4- REAR DAMPERS (MANUAL INPUT) Calculator Critical Damping from (in/s) m/s Fast Bump Threshold mm/s SLOW BUMP to (m/s) 150+mm/s FAST BUMP m/s Fast Rebound Threshold mm/s SLOW REBOUND 150+mm/s FAST REBOUND 4- SUSPENSION TRAVEL 3.5- FRONT SUSPENSION TRAVEL Calculator Shocker Stroke from (in) Bumpstop Length 8.8 Static Deflection to (m) Wheel Travel Bumpstop Up Rod Length Packer Range Packer Range - Rod Length 80 BUMPSTOP_UP

65 110 BUMPSTOP_DN PACKER_RANGE 3.5- FRONT SUSPENSION TRAVEL Calculator Shocker Stroke from (in) Bumpstop Length 8.8 Static Deflection to (m) Wheel Travel Bumpstop Up Rod Length Packer Range Packer Range - Rod Length 110 BUMPSTOP_UP 95 BUMPSTOP_DN PACKER_RANGE

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67 Value Value Instructions (m) Height in Relation to CG (m) Height in Relation to CG (m) Wheel Radius+BaseY=CoG (m) Wheel Radius+BaseY=CoG (m) (m) Track = Car Track + Wheel Ofset (m) Track = Car Track + Wheel Ofset (m) (m) Instructions 1,400 (kg) Total Empty Weight + 75Kg Driver 0.60 (%) Front Weight Distribution in % 840 (kg) Total Front Weight 560 (kg) Total Rear Weight 95 (kg) Front Total Unsprung Weight 90 (kg) Rear Total Unsprung Weight 745 (kg) Total Front Sprung Weight 470 (kg) Total Rear Sprung Weight 1,215 (kg) 40,000 (NM) Use convertion helper if you have lb/in (m) Wishbone Efective Length (d2) (m) Spring Pivot Length (d1) 0.0 (deg) Front Spring Correction Angle Front Spring Motion Ratio 36,864 (NM) WR = SR*MR^2 38,000 (NM) Use convertion helper if you have lb/in (m) Wishbone Efective Length (d2) (m) Spring Pivot Length (d1) 0.0 (deg) Rear Spring Correction Angle Rear Spring Motion Ratio 23,417 (NM) WR = SR*MR^ (in) Lenght of end perpendicular to B

68 29.00 (in) Lenght of center section (in) Lenght of ends 0.78 (in) Diameter of ARB 186 (lb/in) Choose this if you have lb/in rates 32,630 (NM) Choose this if you have NM rates 0.31 (m) Front ARB Efective Motion Lenght 0.0 (Deg) ARB Correction Angle ,193 (NM) WR=SR*MR^ (in) Lenght of end perpendicular to B (in) Lenght of center section (in) Lenght of ends 0.78 (in) Diameter of ARB 186 (lb/in) Choose this if you have lb/in rates 32,630 (NM) Choose this if you have NM rates 0.31 (m) Front ARB Efective Motion Lenght 0.0 (Deg) ARB Correction Angle ,193 (NM) WR=SR*MR^ (Hz) 1.56 (Hz) Road cars = (1-2hz); Race cars = (2-2.5hz); Strong downforce = (2.5+hz) Road cars = (1-2hz); Race cars = (2-2.5hz); Strong downforce = (2.5+hz) 5+ = Good Sprung/Unsprung Ratio 2 = Very Poor Sprung/Unsprung Ratio = Good Sprung/Unsprung Ratio 2 = Very Poor Sprung/Unsprung Ratio = Good Sprung/Unsprung Ratio 2 = Very Poor Sprung/Unsprung Ratio Value (%) 7,411 (NM) Fill in the (%s below) 3,706 (NM) 50% 2,223 (NM) 30%

69 5,188 (NM) 70% 2,223 (NM) 30% 4,692 (NM) Fill in the (%s below) 2,346 (NM) 50% 1,407 (NM) 30% 3,284 (NM) 70% 1,407 (NM) 30% 7,411 (NM) (%) (m/s) 3,544 (NM) 48% 2,123 (NM) 29% (m/s) 4,961 (NM) 67% 2,126 (NM) 29% 4,692 (NM) Fill in the (%s below) (m/s) 2,374 (NM) 51% 1,424 (NM) 30% (m/s) 3,323 (NM) 71% 1,424 (NM) 30% Value Description (m) Total Shock Travel (m) Rubber Bumpstop Length (m) Wheel Rate / Sprung Weight (m) Shock Stroke / Motion Ratio (m) Wheel Travel - Static Deflection (m) Increase to raise Ride Height (m) Bp Up + Rod Length - Bp Length (m) Compression Travel (m) Copy this to Suspension.ini

70 (m) Copy this to Suspension.ini (m) Copy this to Suspension.ini (m) Total Shock Travel (m) Rubber Bumpstop Length (m) Wheel Rate / Sprung Weight (m) Shock Stroke / Motion Ratio (m) Wheel Travel - Static Deflection (m) Increase to raise Ride Height (m) Bp Up + Rod Length - Bp Length (m) Compression Travel (m) Copy this to Suspension.ini (m) Copy this to Suspension.ini (m) Copy this to Suspension.ini

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73 A C B A C Instructions For more comfort, use Bump/Re Reference Ratio 3:1 Ratio 2:1 Ratio 1.5:1 50% for Bumpy Tracks / 70% for Smooth Tracks 1,235 1,853 2,470 30% - 40% 741 1,112 1,482

74 50% - 70% (For more body control) 5,188 5,188 5,188 30% - 40% 2,223 2,223 2,223 Reference Ratio 3:1 Ratio 2:1 Ratio 1.5:1 50% for Bumpy Tracks / 70% for Smooth Tracks 782 1,173 1,564 30% - 40% % - 70% (For more body control) 3,284 3,284 3,284 30% - 40% 1,407 1,407 1, Reference Slow/Fast Threshold ("Damper s Nose") % for Bumpy Tracks / 70% for Smooth Tracks % - 40% Slow/Fast Threshold ("Damper s Nose") % - 70% (For more body control) % - 40% Reference Slow/Fast Threshold ("Damper s Nose") % for Bumpy Tracks / 70% for Smooth Tracks % - 40% Slow/Fast Threshold ("Damper s Nose") % - 70% (For more body control) % - 40% Instructions 1- Input the Total Shock Travel and Bumpstop Length 2- Copy the values in GREEN to the suspension.ini and check the ride height 3- Adjust Rod_Lenght, copy the GREEN values to suspension.ini and check ingame again 4- Repeat (3) until the Ride Height matches the real car s.

75 1- Input the Total Shock Travel and Bumpstop Length 2- Copy the values in GREEN to the suspension.ini and check the ride height 3- Adjust Rod_Lenght, copy the GREEN values to suspension.ini and check ingame again 4- Repeat (3) until the Ride Height matches the real car s.

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78 ebound Ratio of 3:1 Ratio 1.2:1 3,088 1,853

79 5,188 2,223 Ratio 1.2:1 1,955 1,173 3,284 1,407 5,308 3, ,544 5, ,961-5, ,961-5,315 3,560 2, ,374 3, , ,560-3,323-3,560 extension = dn compression = up

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82 WIP ABS Slip ratio = (Vehicle speed Wheel speed)/vehicle speed 100%