181 Porsche 934 IMSA
*RAC 2025 v2.2
Tweaks to the engine, power, tyres, steering and suspension setup, garage setup options, drivetrain, final drives and changable gear ratios, aero, edited bodywork collider, ground collider.
*Credits to original car 3D model makers and to Pfalzdriver for all his initial work, tweaks and fixes on 3D, CSP, VAO, skins etc. in his versions 1.0-1.6

Engine: Porsche 930/71
Engine type: B6
Capacity: (cc) 2993
Power: ~600 HP/7200 RPM
Torque: ~620 Nm/5400 RPM
Induction: 1.4 bar from 1 KKK turbo (2,7)

Porsche introduced the new 930 model in 1975. This 911 Turbo Type 930 would serve as the basis for the new Group 4 racer, which would be dubbed the Type 934. During the development of the 930, the needs of the 934 were taken into consideration and planned appropriately.
The Porsche 934 was built to satisfy the FIA Group 4 rules and to continue the marque's success in that class. The structure of the vehicle was strengthened, the braking and steering system was improved, and efforts were made to reduce its weight. Finally, a car weighing only 1090 kilograms was created, powered by a 480 HP engine (later upgraded to 550 and 600 HP!). It was able to reach a maximum speed of over 300 km/h, and its acceleration from 0 to 100 km/h was 3.9 seconds. The Porsche 934 car was popular in the German touring car championship in the 70s, the Deutsche Rennsport Meisterschaft (DRM for short). But also in both the European GT Championship and the TransAm Championship, the Porsche 934 was a dominant force. The highlights were from 1977 through 1979 when it captured three successive class victories at the legendary 24 Hours of LeMans.

Introduced as a hardcore racer's Porsche, only a small number of 934s were made for street use. Of the 31 true 934s built, most if not all were destined for a hard life of race use. The street cars were produced only to fulfill a requirement of the FIA's Group 4 regulations. The Porsche 934 was built to dominate on the tracks, not to be flaunted on the streets.

Even with its optimally placed ballast and advanced aerodynamics, the 934 was a handful on the track. The inherent tail-happiness of the 911 design, the manic power levels, and the fairly high weight created a vehicle that could break loose easily. The air metering units were essentially the same as production 930 units, albeit polished to improve flow, and with the spun aluminum cone on the air flapper plate. The turbo was a K33, and later a K36 unit - low power unti about 5000rpm, then everything at once.

Proving the great dynamics of a trademark Porsche design, the 934 was a formidable beast with wild wings that remained every ounce a 911. The car will always be remembered as one of the last spectacular Porsche racers to remain so true to that hallmark curvature. But power windows and resemblance to lesser models aside, the 934 was a devastating weapon in the hands of any driver brave and skilled enough to harness its awesome performance.

Read: https://www.conceptcarz.com/vehicle/series.aspx?makeID=122&modelID=2352&h=12671#12671

https://supercarnostalgia.com/blog/porsche-911-30-turbo-carrera-rsr-934