Porsche 550 Spyder v2.5

classic 4 cylinder aircooled boxer race car

  1. Ensyuya
    Do not distribute this mod other than this RACE DEPARTMENT, share this forum link. and do not modify this mod without author agreement.


    Old forum link

    Porsche 550 spyder v2.0 updated Sep 15, 2016
    550 body panels have been completed again and they were reborn. Rear cowl, doors around, and front fenders around were improved. Moreover I achieved to reduce 45000 polygons manually in this work.
    I'm reviewing the shape, size, location, and angle of dash knobs, headlights, turnsignals, taillights, and so on.
    To suit the cockpit for new body panel at that time. Bottoms of doors are raised, so I had to manage to adjust cockpit too. Working with the cockpit earned about 10000 polygons in the end.
    Annoying bug at the rear cowl, the shape is wrong, big mistake, I fixed it.
    Many parts of the 550 mod are revamped.

    Followings are update details in new files.
    - Revamped 3D model
    - Driver position has been moved lower
    - Added new driver's eye position alongside Kunos camera update since version 1.6.0.
    - Adjusted camera views
    - New UVmap
    - Ambient occlusion effect
    - New template for livery
    - Added them to the interior, serial number plate, fuse box, fuel pump, foot dimmer switch, fire extinguisher
    - S1 hill climb model has new front face, tonneau cover, and tubular frame in the cockpit
    - Clipping noise of base model idle sound is fixed
    - Improve sound quality of base model
    - Adjusted volume levels of each sounds.
    - Adjusted the outside of the engine idle sound.
    - Added [HEAD_MOVEMENT] in driver3d.ini
    - New preview screens
    - Some shader adjustments

    - New V10 Tyre model
    - New gear ratios for Hillclimb version from Porsche standards ratios
    - Simplified setup menus, removed many options
    - Fine tuning of gearbox timings, clutch, aerodynamics, etc..

    New Credits added
    - Base version historical liveries from No.8 to 20 by Patrice Cote
    - Hillclimb version historical liveries from No.5 to 15 by Patrice Cote

    Note: On tyre parameters, ideal pressure is 42 psi, optimal temperature range is 40 to 80C for R3, 40 to 90C for R5.

    Adjusted shader settings and polygon counts of LOD optimization
    LOD A 168100(base) 166843(hillclimb)
    LOD B 90016 5m
    LOD C 37554 24m
    LOD D 4243 48m

    Screenshot_porsche_550_1500_rs_spyder_hockekk_f3ct_9-9-116-1-42-51.jpg Showroom_porsche_550_1500_rs_spyder_s1_15-8-2016-10-16-20.jpg Screenshot_porsche_550_1500_rs_spyder_bridgehampton_15-9-116-10-44-7.jpg Showroom_porsche_550_1500_rs_spyder_9-8-2016-1-8-26.jpg Showroom_porsche_550_1500_rs_spyder_s1_9-8-2016-1-12-23.jpg

    Release notes
    The two physics set.
    The base 1955 Porsche 550/1500 RS (110 BHp, Dunlop R3 natural rubber tires - overheats at 80C, huge slip angle possible)
    And the "s1" version being a late 50's hillclimb prepared version with RSK engine part upgrade, increased displacement (1650-1700cc) and new Dunlop R5 tires (synthetic rubber) slightly wider rubber at the rear. Such a car finished 2nd at the 1960 Pikes Peak with Roger Ward at the wheel. We used dyno curves of a 547 1755cc engine.

    Porsche 550 physics background
    The 550 was basically the first ever mid-engine road car, so its design is not perfect. Suspension was all based on VW parts. Front was the double torsion bars (a Porsche patent) and rear was a basic swing axle - both causing horrible camber change under cornering. On top of that, the frame was weak and twisted a lot. It has drum brakes and 50's tires less than 100mm (4'') wide.
    However, aerodynamics was very sleek. Weight and inertia are extremely low (under 600kg) and the 4-cam 547 engine was way ahead of its time, revving easily up to 7500 rpm. It would be Porsche's race department workhorse for an entire decade.

    Overall the car has good handling for its time, but it was notoriously oversteering . Many period pictures show 550's in oversteer.
    Ken Miles (aka "Spyderman") said: "Steering the 550 was very much a matter of very large steering movement to produce the desired result",
    He also mentioned this about the 550 vs 550A (not in the mod currently) “The change in handling is unbelievable. Gone was the excessive oversteer (of the original 550), the RS (550A) was now as forgiving a car as one could possibly wish to meet."

    Ensyuya (Mitsunari Ishii) : Project lead, 3d Model, textures, animations, shaders, sounds
    Patrice Cote : Physics, UI car history, historical liveries base version from No.8 to 20, hillclimb version from No.5 to 15

    Engine sound sources of base model except idling sound : Citytea

    Beta tester : Phil E, Maseratialfa, Jon Uyan and Hutch from the CMS Historical racing league (cmsracing.com)

    Special thanks to "Toonces" for sharing his hands-on experience and notes on the real 550.

    About sounds
    In base model of this Porsche 550 mod, the engine sound sources are from real type 547 engine that Citytea recorded around 2006 at Salzburgring with his old Boss R-1 digital-recorder. He gave us permission to use with pleasure.

    Otherwise, the engine sound of S1 upgrade model has been made by Ensyuya from scratch build completely.

    Other sound samples are recorded by Ensyuya from real classic VWs or Kunos original ones.

    Base model engine sound was made for type 547/1 and 547/2, S1 upgrade model one was made for type 547/3 and 547/4.

    Damage model function fully works
    550 spyder mod got all functions that should be in this mod. All functions Kunos implemented in AC are working properly.

    Benchmark of 550/1500 RS Spyder mod (Ensyuya, Jun 27, 2015)

    I tried to measure the PC system performance hit of 550/1500 RS Spyder mod, because the development of basic part of this mod has been completed all. I used the official Alfa Romeo GTA for comparison as the benchmark. Generally results are not so bad for this mod. The load of this mod to the system is about 30% heavier than the Alfa Romeo GTA.

    System specification of my PC

    CPU Core i3 Clarkdale @3.5GHz

    System memory 8GB

    GPU Geforce 560GTX with graphics memory 1GB


    Resolution 1280 x 720

    Single Screen

    Full Screen

    Anisotropic Filtering 4x

    Anti-Aliasing Samples Off

    World detail Max

    Shadow Resolution Ultra

    Smoke generation Normal

    smoke in mirrors Off

    Enable post - processing effects Default

    Mirror Resolution Normal

    HQ Mirror Reflection Off

    Reflection Quality Medium

    Reflection Rendering Frequency Medium
    Quick Race

    Single-make grid (Opponents will use the same car as you)

    WEATHER Clear



    Porsche 550/1500 RS Spyder

    Opponents total = 10

    Warning CPU Occupancy > 99% = once for a moment

    FPS min = 30
    max = 49
    average = 40+

    Alfa Romeo GTA

    Opponents total = 14

    Warning CPU Occupancy > 99% = once for a moment

    FPS min = 26
    max = 40
    average = 30+


    Eastern Creek Brabham

    Porsche 550/1500 RS Spyder

    Opponents total = 9

    Warning CPU Occupancy > 99% = none

    FPS min = 28
    max = 58
    average = 35+

    Alfa Romeo GTA

    Opponents total = 13

    Warning CPU Occupancy > 99% = 3 times

    FPS min = 22
    max = 58
    average = 30+-



    Porsche 550/1500 RS Spyder

    Opponents total = 10

    Warning CPU Occupancy > 99% = none

    FPS min = 31
    max = 47
    average = 35+

    Alfa Romeo GTA

    Opponents total = 13

    Warning CPU Occupancy > 99% = none

    FPS min = 27
    max = 50+
    average = 35+-

    Ensyuya, Patrice Cote, updated Sep 15, 2016

    If you enjoy this mod and would like to support us, please consider a donation:


    Screenshot_porsche_550_1500_rs_spyder_s1_mills_18-1-117-22-38-41.jpg Screenshot_porsche_550_1500_rs_spyder_s1_mills_18-1-117-22-44-8.jpg Screenshot_porsche_550_1500_rs_spyder_s1_riverside_16-1-117-4-33-16.jpg Screenshot_porsche_550_1500_rs_spyder_s1_riverside_16-1-117-4-34-21.jpg
    Otacon008, roviet, ladose and 23 others like this.

Recent Reviews

  1. kupumer
    Version: v2.5
    good job!! James Dean car!
  2. Ralle570
    Version: v2.5
    Love this car thank you
  3. Renan Becker
    Renan Becker
    Version: v2.5
    Excelent car! The feeling is amezing!
  4. smurth
    Version: v2.5
    Perfect ;)

    My two cents:



    and for the S1:
  5. exhausts45
    Version: v2.5
    Very good, perfect 3 model, awesome physics.
  6. jurik1984
    Version: v2.5
    Great job!
  7. Celestiale
    Version: v2.4
    very good
  8. TylerDurden4321
    Version: 2.3
    The 3D model and cockpit aren't really a looker, but the suspension feels very believable (and AWEsome!), fantastic work on that! So far I would round 4.5 up to 5 stars, weren't it for the tires. I know you got clues from the Maseratis; maybe get some more clues from the upcoming Kunos Porsche 718 and mix that into your current tire data ...and also review the temperatures, then you'll get the full 5 stars from me. It's very fun to drive already though, thank you for that!
  9. Albertari
    Version: 2.3
    Thanks for update the sounds of this wanderful mod. The physics are amezing, lot of fun driving it.
  10. Deswribilator
    Version: 2.3
  11. correca
    Version: 2.3
    Great job, fantastic Mod. Thank you very much.
  12. Peter Koslowski
    Peter Koslowski
    Version: 2.3
    Very good improvement! You can drive this wonderful car on Bridgehampton (TIKAL SPORT).
  13. ScuderiaVeloce
    Version: 2.2
    Great car! I will be driving this Porsche in the meantime before the Porsche pack is released. Thanks!
  14. antirussia81
    Version: 2.2
    Yesterday I tried it for the first time and have to say that I love this little car. Alas, my love is not completely requited - apparently the S1 version hates me and even tried to kill me. The basic car is great fun to drive. The S1 is an excellent choice for those who love carousels and a merry-go-rounds.
  15. mcschraube
    Version: 2.1
    Excellent work!
  16. Fishey55
    Version: 2.1
    One of the best Mods out there!, period!
  17. K4rBonStig
    Version: 2.1
    Many thanks!
  18. Holiace
    Version: 2.0
    This is currently the BEST vintage car for Assetto Corsa.

    It's really tricky to drive, it moves all over the track and VERY careful throttle usage is neeed to corner well. What a stellar mod!
  19. Fanapryde
    Version: 2.0
    Really nicely made car, awesome sound (no idea if it is genuine). Very addictive drive.
  20. mantasisg
    Version: 2.0
    Awesome update, it is just right and very entertaining. I also found it drivable, standard is not hard to handle at all. You people who were rude enough to give 3 or even 2 stars just because YOU couldn't handle it, those stars are for your skill and knowledge of driving such car. It is not GT3, where you can be flat out most of time. This is great mod, sounds good, drives well, and model is nice. Definitely worth to add to the garage.
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