Holden VL Commodore SS Group A SV - THR TTM

atcc_holden_vl_grpa_dtm92

Used at THR from 2024 to 2026

Brand: Holden
Country: Australia
Class: Group A
Year: 1990
Author: RJE, ACTK, Valentin K, Syriker
Version: v1.7.3
Power: 537 bhp
Torque: 554 Nm
Weight: 1325 kg
Top speed: 310+ km/h
Acceleration: 4.29s 0-100
Power / weight: 2.47 kg/hp

Private League Derivative for TTM at THR============================Engine:- Type: HSV Injected V8 (Iron Lion) Group A - Configuration: 5.0L cross-plane V8 OHV 16V with EFI- Aspiration: natural with twin throttle manifold by TWR (inspired by Rover SD1)- Interesting fact: The Peter-Stevens-designed TWR bodykit improved drag and drastically lowered the lift, but did not cancel out all of it.Pros:- highest power of all- very high top speed- widest tyres (12") of all, on surprisingly light Perkins Dymag 17x11" magnesium rims- smooth power delivery- front carbon brakes from TWR's Jaguar Le Mans programCons:- cold brakes are very difficult (steel rear starts bites at lower temps than carbon front)- highest weight & consumption- only 5 gears- TWR aero kit designed by Peter Stevens did not cancel out all aerodynamic lift- rear suspension is an asymmetrically-linked (3-link) live axle- very high rear unsprung mass============================Changelog v1.7.3 (TTM 2026)- tyres updated to TTM 2026 compounds- reworked springs, dampers, packer ranges and bumpstops by Syriker - improved CSP config for LOD B+C taillights- FINAL edit after RC phase: more detailed spring rate adjustments-------------------------------------------------Changelog v1.7.2 (TTM 2025):1. car.ini: - weight reduced by 125 kg to 1325 kg (ATCC)- installed 120L CAMS endurance tank & increased fuel consumption2. suspension.ini: - revised front suspension geometry (angle-induced Y & Z offsets)- recalculated front & rear hub mass- rear axle geometry updated- softer front damper fastbump (2500->1500) hardcoded- stiffer default front damper bump (11250), softer rebound (2655)- BASEY updated3. setup.ini: - 3 gearboxes (Borg Warner BT5G + 2x Holinger GRA-5)- fuel capacity: 120L endurance tank (same location as Group A)- added alternative gearset from 1990- front damper bump adjustment MAX raised from 11250 to 15000- converted all damper setup options to steps 4. 3D model: - added small left exhaust cutout- fixed material alpha of lit cockpit switches5. collider.kn5 updated for better alignment to 3D model6. colliders.ini updated to match adjusted center of gravity and graphics offset7. tyres.ini: - recalculated angular inertia of wheels- recalculated (lowered) FZ0- HX tyre: SURFACE_ROLLING_K=0.5641 (Delta 0.03 between compounds)8. dash_cam.ini: moved dash cam back 2 cm and down 1 cm9. flames.ini: revised positions to match chassis PE010 single side exhaust10. analog_instruments.ini: updated fuel gauge for 120L CAMS endurance tank11. drivetrain.ini: - differential revised (less coast, more lock)- new default gearbox Borg Warner BT5G12. brakes.ini fully reworked13. engine.ini: limiter raised by 500 rpm (result: 8500 rpm)14. ext_config.ini: - fixed interior shading- new warning lights (fuel, oil pressure, voltage)- better exhaust smoke (true-to-life)v1.7.1 (TTM 2024 hotfix): tyres.ini: DY_REF and DX_REF of HX compound corrected==== Basis ====1) RJE/Assettomods v1.5 mod: https://assettomods.com/atcc-group-a-pack-v1-5/2) plus adjustments by ACTK (v1.6) but but only two of his edits remain untouched: - collider.kn5- wipers==== Fundamental Changes for this TTM derivative ====Physics Changes:Suspension:- NEW front STRUT suspension geometry with 3.63° caster- NEW rear AXLE suspension geometry with 2 lower trailing arms & 1 top right arm (RJE mod had a DWB) Reference: FIA Homologation & https://www.youtube.com/watch?v=8FTX_KR2su8Global Data Changes:- car.ini TOTALMASS=1525 to comply with 75 kg driver + 1450 kg mandate for 5.0L engines in DTM 1992 rulebook (note: we previously tested ATCC 1992 rulebook's 1325 kg but it was too OP with that)- car.ini Fuel consumption adjusted- car.ini Fuel tank rescaled to 83L (FIA homologation) and relocated to match PE010 tank location- analog_instruments.ini fuel gauge rescaled to match updated fuel capacity- lights.ini revised to use reflectors instead of illuminating a mistakenly opaque glass texture- colliders.ini adjusted again- dash_cam.ini adjusted- flames.ini relocated to match sidepipe exhaust position of chassis PE010 from ATCC 1992 seasonTyre Changes:- Rim colliders for tyre compression rescaled to 17" diameter (8.5" radius)- Tyre Names reverted to DTM90s (it was the same tyre model anyway as on the Kunos 190E)- FZ0 of tyres increased by 33.33% to account for 12 inch wide racing tyres on 11 inch wide wheels as raced in ATCC since late 1990 season (baseline value: FZ0 from 9 inch wheels on 190E and M3)- Added DTM90s Hard compound tyre- Developed New DTM90s Extra Hard compound tyreEngine changes:- power.lut All-New engine torque curve based on dyno data of a Perkins Engineering Twin Throttle Group A engine with 13% friction loss factored in and extrapolated to the 8800 rpm reported for Perkins's Bathurst shootout lap. Video source: https://www.youtube.com/watch?v=jj6jpZwRay4 - engine.ini revised for higher engine braking torque, higher rev limiter, higher damage threshold (Perkins revved it to 8800 in the 1992 Tooheys 1000 shootout)Gearbox (drivetrain.ini & final.rto):- gearbox replaced by Holinger 5-speed gearbox ratios from Group A homologation documents of the VL Commodore SS Group A SV (Extension 27/16V0 on Homologation A-5282)- final ratios replaced by those from the same homologation package- differential converted from 100% lock to 30% lockSetup.ini:- increased ground clearance adjustment range------------------------------------------------3D Model & LOD Changes:- headlight glass glasslh_a_SUB1: shader change to KsPerPixelReflection, new texture - brake discs spun off into separate material, shader change to KsBrakedisc & addition of new Normals, Blur & Glow textures- new txDamageMask drawn & imported for body- new txNormals drawn & imported for body- new txDamage drawn & imported for body- new txDust drawn & imported for bodyNote: Damage & Dust only randomly affect the skirts on the front, side, and rear, because they're assigned to the same damage shader textures but mapped under a different UV map layout.------------------------------------------------All-New CSP Extension Config with following features:- headlight low/highbeam separation in LOD 0- turn signals- reversing lights- tail & brake light effects with different brightness- working reflector in tail light assembly- custom oil pressure calculation & working gauge - customized exhaust flame behaviour- light exhaust smoke like on Perkins's 1992 Toohey's 1000 shootout lap- headlight glass set as photoelastic glass- deforming hood & rear spoiler in LOD 0--------------------------------------------Skins: renamed defaults, plus:from "ATCC 5L Touring Car Skins":https://www.overtake.gg/downloads/1995-bathurst-1000-car-livery-track-skin-pack.56012/https://www.overtake.gg/downloads/1995-atcc-additional-car-skins-pack.54392/

#90s touringrwdmanualracegrAtouringvintage#80s touringATCCATCC GrpA Over 3000ccDTM92TTMTHR TTMGr. A 1992

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Championships5

Events22

Race sessions31

Drivers14

Years active2024–2026

Starts81

Wins7

Race laps1,754

Race distance10,869 km

Race time71.8 h

Championship	Period	Events	Starts	Wins	Drivers	Race laps
TTM 2025 - THRacing Tourenwagen Meisterschaft	2025–2026	6	20	1	5	505
TCTM 2025 - Casual Championship	2025–2026	5	10	2	2	161
TTM 2024 - THRacing Tourenwagen Meisterschaft	2024	6	37	2	9	898
TTM 2024 - THRacing Tourenwagen Meisterschaft - Practice Races	2024	4	12	1	3	116
TTM 2024 Prologue at Donington Park - Fun Event	2024	1	2	1	2	74