Ford Sierra RS500 Cosworth - THR TTM

ford_sierra_cosworth_rs500_ttm

Used at THR from 2025 to 2026

Brand: Ford
Country: Great Britain
Class: Group A
Year: 1987
Author: J.Leman, Akina Style, JCY, Valentin K
Version: 3.2
Power: 573 bhp
Torque: 652 Nm
Weight: 1210 kg
Top speed: 310+ km/h
Acceleration: 4.06s 0-100
Power / weight: 2.11 kg/hp

Private League Derivative for TTM at THR===========================Engine: - Type: Cosworth YBD- Configuration: 2.0L inline-4 DOHC 16V with EFI- Aspiration: Garrett T4 turbocharger (limited to 2.0 bar using a wastegate)- Interesting fact: DJR Sierras had up to 680 hp with 2.4 bar in ATCC 1992Pros:- devastating acceleration on boost- very high top speed- optional 6-speed Holinger gearbox (introduced in ATCC mid-1991)- high rear downforce- very powerful brakes (might fade)Cons:- enormous turbo lag- boost comes on like a light switch- narrow tyres are overwhelmed by the engine- high weight- heavily rear-biased downforce (not adjustable)- no ABS===========================Credits:- Base Car, DTM skins by J.Leman, Akina Style (v3.0)- Sound by Bitto69 (v0.8)- TTM basis: JackCY (2021 THR League Proposal Physics)- TTM edits: Valentin KLinks: https://www.overtake.gg/downloads/ford-sierra-cosworth-rs500-pack.24027/https://www.overtake.gg/downloads/ford-sierra-rs500-gra-rally.50770/https://www.overtake.gg/downloads/ford-sierra-cosworth-rs500-skins-pack.32952/https://www.overtake.gg/downloads/ford-sierra-rs500-gra-rally.50770/____________________________________________CHANGELOGv3.2 updates for THR TTM 2026 season:- fuel tank swapped to 120L endurance spec- revised engine, turbo now works without LUT boost controller- added TTM 2026 tyre compounds- TO DO: fuel consumption aligned to match the 1990 Bathurst lead car of DJR (38 laps per tank) ----------------------------------------------v3.1 updates for THR TTM 2025 season:1) engine/turbo: brandnew engine designed in Automation2) sound: new sound by Bitto693) collider.kn5: new4) electronics.ini: removed ABS, traction control & electronic differential lock5) car.ini:- weight 1210 kg + driver (2.0L x 1.7 turbo x 1.0 for 4-valve head = 3500cc group)- fuel tank upsized to 120L endurance spec and repositioned to match real life- fuel consumption recalibrated to match new engine- driver eyes repositioned- graphical offset adjusted by Y -0.02 to make the car appear lower6) setup.ini: - aero adjustments removed for greater accuracy- increased rear axle ground clearance adjustment range7) Aerodynamics- aero front: rebuilt with repositioned and resized wing span- aero rear: rebuilt with repositioned and resized wing span8) tyres: - fully rebuilt based on BMW M3 properties- grip for all TTM92 tyre compounds increased by 2.7-2.8% compared to 20249) flames.ini: updated exhaust flame10) cameras.ini: new F6 cameras (Onboard TV angles)11) drivetrain.ini: gearbox properties harmonized to common standard12) brakes.ini fully reworked13) recalculated angular inertia of wheels, and recalculated unsprung hub mass14) ext_config.ini: - added smoke- added turbo indicator lamp, shift light, oil pressure warning light, highbeam indicator----------------------------------------------v3.0.1 Bugfix: tyres.ini: corrected DY_REF and DX_REF of HX compound----------------------------------------------==== Physics (on top of JCY physics) ====- drivetrain.ini & setup.ini: configured all 4 gearboxes that were Group A homologated for RS500 in Group A competition by F.I.S.A. (5- & 6-speed)- final.rto: added all 38 final ratios that were Group A homologated by F.I.S.A.- colliders.ini: new ground collider- brakes.ini: added brake temperature modelling- dash_cam.ini: re-positioned to match 190E and M3- electronics.ini: upgraded ABS to 4-channel specification again to match TTM-spec M3 & 190E- tyres.ini: --- added new Extra Hard (HX) tyre compound--- reverted thermals of S, M & H tyres to Kunos M3 Gr.A92 specification- ext_config.ini from v3.1 and expanded to add dedicated highbeam headlight emissive, 1 reversing light, and some better dash lights. No rear turn signals because the tail light object to texture mapping makes it impossible to configure skins:- original real-life skins by NWRAPGraphics- added real-life DTM 1988-89 skins by =LM=908GTS:https://www.overtake.gg/downloads/ford-sierra-cosworth-rs500-skins-pack.32952/

rwdmanualraceDTMTTM

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Championships3

Events8

Race sessions10

Drivers10

Years active2025–2026

Starts29

Wins3

Race laps681

Race distance3,803 km

Race time25.7 h

Championship	Period	Events	Starts	Wins	Drivers	Race laps
TTM 2025 - THRacing Tourenwagen Meisterschaft	2025–2026	6	22	2	6	579
TCTM 2025 - Casual Championship	2025	1	2	1	1	42
TTM 2025 Prologue at Spa - Fun Event	2025	1	5	0	3	60