Secrets of GTR2

Welcome to Secrets of GTR2 where I will be recording my experience, tips, tricks, resources and other helpful information as I get into GTR2.

Secrets of GTR2

Welcome to Secrets of GTR2 where I will be recording my experience, tips, tricks, resources and other helpful information as I get into GTR2.

Secrets of X is a series of blog posts I started with Secrets of iRacing. The “secrets” part is a little dramatic but there are quite a few tid bits I think new users will find very interesting and valuable.

Update 2017-09-22: Now using AI to AI Collision Rate=”32″ as I’m no longer experiencing FPS loss, maybe only stock tracks are affected and not HQ tracks. Try running HQ tracks if you have this problem. Added 5. Adding Friction and Damper under Force Feedback > My Personal Force Feedback Tweaking Notes. Added Force Feedback Settings under Getting Started > Modernizing as, while it may seem obvious, I wanted to highlight the need to do more than is available in-game to get closer to modern standards for FFB feeling. Added note about preferring HQ Cars and Tracks due to improved handling and grip adjustments in Getting Started > Modernizing > Mod: GTR2 HQ Mods Collection.

Update 2017-09-21: Added 4. Improving Corner Feeling under Force Feedback > My Personal Force Feedback Tweaking Notes.

Update 2017-09-17 – 2: HQ Cars & Tracks is working for me again after a fix. See comments under Modernizing > Mod: GTR2 HQ Mods Collection. Added Troubleshooting > Enable Tracing.

Update 2017-09-17: Added Troubleshooting section. Noted HQ Cars & Tracks was crashing for me. This works now, see comments under Modernizing > Mod: GTR2 HQ Mods Collection.

Update 2017-09-16: Added Tips & Tricks regarding turning up tire scrub and tire skid volumes and regarding refreshing old mod files if you’re experiencing instability.

Update 2017-09-15: Added Modernizing > 4GB Patch notes. Added GTR2 HQ CARS & TRACKS – 10th Anniversary and GTR2 HQ AI under Modernizing > Mod: GTR2 HQ Mods Collection. Added note that I’ve stopped using the Changing Weather Patch due to suspected instability.

Update 2017-09-14: Added Mod Spotlight > DTM Classics Mod with details for getting it running in 2017.

Update 2017-09-11: Detailed my FFB tuning in the section “My Personal Force Feedback Tweaking Notes”. Important! After a few rounds of FFB tuning I finally feel like I have a simple FFB setup that achieves car stability, quick response, and road feel. Added “GTR2 Crashes – It might Be Other Accelerated Graphics Apps” to the Tips and Tricks section.

Update 2017-09-08: Added “Disable Auto-pit and ai control” under the “Tips and Tricks” section. Noted tweaks in the “Make GTR2 Use More Cores For Better Performance” section under Performance. Added “My Personal Force Feedback Tweaking Notes” under the Force Feedback section.

Update 2017-09-06: Noted I’ve started over again from Julien Regnard’s FFB guide tuning FFB from baseline values instead of PLR defaults values under the “Helpful Guide for Advanced Force Feedback Tweaking” heading. Highly recommended. Don’t skip it like I did.

Update 2017-09-01 – 2: Added main section Performance and sub-section Make GTR2 Use More Cores For Better Performance to describe GTR2’s single-core use and how to get it to use more than a single core for better performance.

Update 2017-09-01: Added a Table of Contents for more convenient organization and to make it easier to find what you want.

Update 2017-08-30: Updated Force Feedback section to include more details on finding my optimal “FFB steer force average weight”, “FFB steer force exponent”, and “FFB rumble strip pull factor”. Also added “Force Feedback Tweaking Guide for Simbin Games by Julien Regnard” in Force Feedback section.

Update 2017-08-25: Added Changing Weather Patch mod under Modernizing section and added to Mod Spotlight. Updated my latest FFB settings in the Helpful Guide for Advanced Force Feedback Tweaking section.

Update 2017-08-20: Further FFB tweaking of “FFB steer force grip weight” which gives a feel of losing and gaining grip while cornering. Added Tips and Tricks section Use Auto-Clutch With Paddle Shifters. Added main section Mod Spotlight.

Update 2017-08-19 – 2: Added Getting Started sections: Mod: Track update for GTR2 Original Tracks, Mod: New GFX Mod, Field of View, Wheel Rotation and Wheel Lock, iRacing-like Brake Sensitivity for Potentiometer Pedals (eg. G27). Added Adding Game Cars, Tracks, Mods and More main section. Added Force Feedback main section with sub-section Helpful Guide for Advanced Force Feedback Tweaking.

Update 2017-08-19: Welcome to the initial posting of Secrets of GTR2! Check back from time to time as I add things and note the updates in this update box.

What is GTR2?

From the Wikipedia entry,

GTR 2 – FIA GT Racing Game is a sports car racing simulator developed by Blimey! Games and SimBin Studios (later Sector3 Studios) for the x86 PC and is a sequel to GTR. Since its release in September 2006, it has received widespread acclaim. The game simulates the 2003 and 2004 FIA GT Championship racing series.

And here’s the official game trailer,

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iRacing Force Feedback Settings

Update 2017-01-02: I’m now updating FFB information over on my Secrets of iRacing post.

Update 2015-02-26: I’ve been changing up my FFB settings in iRacing lately after realizing that linear ffb resulted in such low force strengths (to avoid clipping) that I wasn’t really feeling the road anymore. The ffb changes were just too subtle. So, because I have a low-end wheel, a G27, I’m now using non-linear ffb and doing the usual binary-search to find the optimal force strength to avoid clipping. I’m doing this only because of my relatively low-end, entry-level G27. I expect the recommended usage for higher strength wheels (T500s/T300s, Fanatec ClubSports, Accuforce Pro, etc.) should still use linear ffb.

Update 2015-02-26 – 2: For the record, a binary search is one where you take your current value, determine whether it’s too little or too much, and then double it (when too little) or halve it (when too much), and repeat that process at each new level to dial in on your optimal value. For example, for iRacing force strengths I might start out at 32, decide that’s too much and go to 16 (half of 32), decide that’s too little and go to 24 (16 + 8 which is half of 16), decide that’s too much and go to 20 (24 – 4 which is half of 8), decide that’s too little and go to 22 (20 + 2 which is half of 4), decide that’s too little and go to 23 (22 + 1 which is half of 2), decide that’s too much and go to 22.5 (22 – 0.5 which is half of 1). This is a real example I just did in iRacing a few minutes ago on the Mazda MX-5.

Update 2015-02-26 – 3: Nvidia users should check out these threads: iRacing graphic optimizations for NVIDIA users, Guide: nVidia iRacing Antialiasing (AA) Settings, NVIDIA SLI Compatibility results. The second guide about AA gives some good settings for Nvidia Inspector (I use in-game 4x AA with Nvidia Inspector AA – Mode “Enhance” and AA – Setting “8xS [Combined: 1×2 SS + 4 MS]”. Read the thread for what they mean). The third thread is about SLI and getting rid of microstuttering (I use Nvidia Inspector “SLI Compatibility Bits” = “0x00402015” per the thread). It’s not perfect but it’s better than in-game AA and should give higher performance.

iRacing Force Feedback Settings

I’m a big fan of iRacing sim racing and I frequent their forums quite a bit. I’ve seen a number of posts, over time, on the iRacing forums about people asking for the right force feedback settings for their wheels. As it turns out, this info in its complete form is harder to come by then you might think so I’ve decided to post everything I know and have implemented for my Logitech G27 for force feedback in iRacing…

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Logitech G27 900 Degrees Steering Across Racing Games

Update 2015-03-22: Mind blowing update here for G27 owners! I’ve just come across a thread, via a question I posed on the iRacing forums, about how to reset the G27 wheel when it glitches in a session and feels like it goes back to the default 200deg rotation. A friendly iRacing member provided the link and…well you just have to go there yourself right now! Here’s what it boils down to: There are undocumented codes for the buttons on the shifter for setting degrees of rotation and one of them is the 900deg setting which you’ll need to reset to if the wheel happens to glitch. Here’s a pic from that thread to help explain:

G27_UDG_miniYou press 1+2 and then one of the T,S,O,X buttons. Here’s my take on what each does: 1+2+T=240deg, 1+2+S=450deg, 1+2+O=630deg, 1+2+X=900deg.I think what they were trying to accomplish is shortcuts for cars with different steering ratios like 240deg for open wheel cars, 450deg for GT cars, 630deg for drift cars, and 900deg for street cars.

Update 2014-08-03: Okay, while I’m not at the point where I want to research every car’s steering ratio, I might be okay with researching types of cars. :) Here’s what I want: I want to use 540 degree wheel rotation (ie. setup in Logitech Profiler) but I want to make it feel like sort of realistic in-game via the use of steering lock settings. For example, F1 steering (540 degrees-ish with 13:1 steering ratio) should feel dramatically more twitchy than a road sports car such as a Porsche(900 degrees-ish with 15:1 steering ratio). So, here’s the list of car types, their wheel rotation, steering ratio, and steering lock: Family: 1080deg wheel rotation, 20:1 ratio, 27 lock; Sports: 900deg wheel rotation, 15:1, 30 lock; Drift/Rally: 720deg wheel rotation, 15:1, 24 lock; GT/Touring: 540deg wheel rotation, 15:1 ratio, 18 lock; F1/Formula: 540deg wheel rotation, 13:1 ratio, 21 lock. For the 540s you have what you need but for the rest we’d need to calculate it: Check this chart (backup link) out instead, from a Live For Speed Forums thread, that lays them all out nicely.

Update 2014-07-26 – 3: Handy online tool for calculating steering locks from wheel rotation and steering ratios. Also, some good reading on wheel rotation/steering ratio/steering locks.

Update 2014-07-26 – 2: I prefer realism in sim racing when I can get it, but I’m also not yet at the point where I want to research every car’s wheel rotation and steering ratio just to set that up in game to get a realistic feel. So I’ve settled on a GT-style 540degree wheel rotation and 18degree steering lock for 15:1 steering ratio. iRacing appears to be the only game I have so far that automatically applies a 900degree setup to real-world wheel rotation and steering ratio in each car they have. For all other games you have to set it manually and often that means every time you get into a car you have to load your custom setup file. After googling a lot, I find most people are happy with a middle-ground GT-style 540degree wheel rotation with 15:1 steering ratio which needs an 18degree steering lock setup. This is a generalization, not all GT cars use those numbers, but what you get in the end is one wheel setup for all racing sims where you get a consistent car turn feel across different car types.

Update 2014-07-26: Understanding SimBin Steering Sensitivity: The following applies to RaceRoom Racing Experience, Race 07, GTR 2, and I assume all SimBin racing games. I finally understand what they’ve done with steering sensitivity. 50 is linear, but either side of 50 is not linear-but-different-ratio as I expected. I finally got it when I was really looking at the steering meter. If I turn the wheel 90deg three times it goes from nothing to full. At 50 each 90deg takes up the same amount of space – so each 90deg physical wheel turn actually represents 90deg virtual wheel turning (broken animations aside). But, at 100 the first 90deg takes up the most, the second 90deg takes up less, and the third 90deg takes up even less – so each 90deg physical wheel turn may not actually represent 90deg car turning. At 0 it’s the other way around. So I choose 50 for steering sensitivity in SimBin titles to ensure that all degree ranges on my wheel rotation act and feel the same way.

Update 2014-07-19: I finally got 900 degrees in Race 07. It is, in fact, the same method as RaceRoom Racing Experience (Set it in the Logitech Profiler and then set the Steering Lock in the Car Setup) but apparently the steering wheel animation won’t be correct if you do that. That would have been okay except there’s no default steering lock like RaceRoom Racing Experience has so you have to set it on every car. I guess that’s technically correct but more hassle than I wanted so I went back to Logitech Profiler default degrees for Race 07. I wish these games would just do the ‘auto-magic’ thing like iRacing does.

Update 2014-07-08: I finally got 900degrees in RaceRoom Racing Experience: (1) Set it in the Profiler, (2) set it in R3E under Vehicle Settings > Wheel Animation (remember this is only animation it has no effect on how it feels), (3) go in to Control > Advanced Settings and set Steering Lock between 28 and 32. You need to google about steering lock and the ratio between that and the rotational degrees of your steering device. I just found the 28-32 metric after reading some discussions. For 540 degrees I’ve seen recommendations of 18-22. I believe the same steering lock applies for Race 07 but I haven’t tried it yet.

Logitech G27 900 Degrees Steering Across Racing Games

race07-3I loved the way iRacing was so easy to setup for the 900 degree turning ability of the Logitech G27 so I tried RaceRoom Racing Experience and Race 07 and was very disappointed there was no way to get that linear steering working when the G27 was setup for 900 degrees. Well, it’s not a real fix, but it’s here’s a decent work-around…

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