- 240
- Traverse City, MI, USA
- Priest8
GT5Calc will not achieve a perfect setup, it is meant as a tool to get you close to a good tune, or as a way to solve tuning problems you may be having with a unruly car. Every car and driving style will be different, so what works for one person may very well not work for the next.
You will need .Net 4 or newer to run this program, as it is written in C# with .Net.
.Net 4
You will need WinRar or some other compression program to open the archive the program is stored in.
WinRar
1) Enter the weight of your car
2) Find the wheel base of your car and enter it (can be found for most cars with a google search)
3) Enter the speed you will be negotiating most of your corners at. I find 60-100 mph a good baseline depending on the car.
4) As of update 1.10, you no longer need to find the weight distribution yourself! You can see it in the ballast menu! Enter the front weight distribution from there and proceed.
5) Enter the front and rear down-force for your car
If your car has front and rear down-force options enter those numbers.
If not you will need to make a guess on what those numbers may be depending on the car.
If not you will need to make a guess on what those numbers may be depending on the car. Most production cars do nat have any aero down-force when they are stock, but to see if they do you can equip a rear wing, then you will be able to see the stock front down-force numbers in the tuning menu. You can then use the PP number to estimate the stock rear down force.
6) Select the engine position in the car
7) Select the if the car is FWD AWD or RWD
8) Click calculate and you will get your front spring rate and rear spring rate in kg/mm
This should (in theory) almost perfectly mathematically balance the car's springs, but if you were setting the car off balance on purpose to correct under/over-steer, you would have to adjust other settings to compensate.
!!! If the results GT5Calc gives you are out of range for the car you are tuning (most commonly too soft), adjust the stiffness setting to until the results are within range. !!!
9) Use the stiffness setting to tune the cars overall stiffness in slightly with testing. I find myself using 22-24 a lot, and maybe 25-26 on rare occasion with some cars.
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When you enter the speed in the calculator, you should be balanced at that speed, tighter below that speed, and looser above that speed. So if you are experiencing a problem where you get very loose at higher speeds trying raising the Speed number.
The damper settings are based of the spring weight, and the drive-train of the car. These are just meant to get you some where near where you should be with dampers. This has not been tested much yet, and will change as version progress.
I have cleaned up my motion ratio code, and have the ability to easily let the user adjust motion ratios. I am still trying to figure out easy way to deal with motion rations, if anyone has any ideas, please let me
The newly added Anti-Roll Bar calculations are just that, new. They do not have a ton of testing, so they may be no where near what they should be. They are based off the weight distribution of the car, and the drive-train. These may very well change greatly after more testing and more of the communities input, but I thought people may like to see them now.
Once you have had a little experience trying it please let me know how it works for you in the poll, and give me more ideas for it.
--------------------------------------------------------------------------------------
Update Notes
--------------------------------------------------------------------------------------
1.0
- Initial release
1.1
- Added the ability to enter kg or lbs, mm or in, and most importantly kph or mph.
1.2b
- Added the ability to figure in aerodynamic down-force
- Adjusted the calculations to make slightly stiffer results
- Fixed some tabbing index errors in 1.1
1.3b
- Fixed some calculations to more accurately represent motion ratios
- Removed some redundant conversion code that could slightly skew results
1.4b
- Added in the ability for the user to adjust overall suspension stiffness
1.5b
- Added damper calculations based off of spring weight and the cars drive-train
- Fixed some tabbing index errors that have persisted since 1.2b, but some still remain
1.51b
- After some testing I changed up the FR shock calculations a bit
2.0b
- Overhauled the UI entirely, making it a bit more stylish
- Changed the default overall suspension stiffness
- Changed the down-force calculations ever so slightly
2.1b
- Added some very rudimentary Anti-Roll Bar calculations
- Fixed a couple of typos in 2.0b
2.2b
- Added the ability to save your calculated setups to a text file
- Fixed a couple tab index errors, I think I almost have them all worked out now
2.21b
- Fixed the text file saving ability, sorry about the inconvenience. I somehow screwed it up right before I built it for release.
2.3b
- Changed up the Anti-Roll bar calculations. They are based on the weight, weight distribution, and drive-train of the car. This has not yet had much testing, please give me your feedback on whether or not it feels better then 2.21
- Fixed a bug where the Anti-Roll bar calculations were not clearing when the user pressed clear.
You will need .Net 4 or newer to run this program, as it is written in C# with .Net.
.Net 4
You will need WinRar or some other compression program to open the archive the program is stored in.
WinRar
1) Enter the weight of your car
2) Find the wheel base of your car and enter it (can be found for most cars with a google search)
3) Enter the speed you will be negotiating most of your corners at. I find 60-100 mph a good baseline depending on the car.
4) As of update 1.10, you no longer need to find the weight distribution yourself! You can see it in the ballast menu! Enter the front weight distribution from there and proceed.
5) Enter the front and rear down-force for your car
If your car has front and rear down-force options enter those numbers.
If not you will need to make a guess on what those numbers may be depending on the car.
If not you will need to make a guess on what those numbers may be depending on the car. Most production cars do nat have any aero down-force when they are stock, but to see if they do you can equip a rear wing, then you will be able to see the stock front down-force numbers in the tuning menu. You can then use the PP number to estimate the stock rear down force.
6) Select the engine position in the car
7) Select the if the car is FWD AWD or RWD
8) Click calculate and you will get your front spring rate and rear spring rate in kg/mm
This should (in theory) almost perfectly mathematically balance the car's springs, but if you were setting the car off balance on purpose to correct under/over-steer, you would have to adjust other settings to compensate.
!!! If the results GT5Calc gives you are out of range for the car you are tuning (most commonly too soft), adjust the stiffness setting to until the results are within range. !!!
9) Use the stiffness setting to tune the cars overall stiffness in slightly with testing. I find myself using 22-24 a lot, and maybe 25-26 on rare occasion with some cars.
--------------------------------------------------------------------------------------
When you enter the speed in the calculator, you should be balanced at that speed, tighter below that speed, and looser above that speed. So if you are experiencing a problem where you get very loose at higher speeds trying raising the Speed number.
The damper settings are based of the spring weight, and the drive-train of the car. These are just meant to get you some where near where you should be with dampers. This has not been tested much yet, and will change as version progress.
I have cleaned up my motion ratio code, and have the ability to easily let the user adjust motion ratios. I am still trying to figure out easy way to deal with motion rations, if anyone has any ideas, please let me
The newly added Anti-Roll Bar calculations are just that, new. They do not have a ton of testing, so they may be no where near what they should be. They are based off the weight distribution of the car, and the drive-train. These may very well change greatly after more testing and more of the communities input, but I thought people may like to see them now.
Once you have had a little experience trying it please let me know how it works for you in the poll, and give me more ideas for it.
--------------------------------------------------------------------------------------
Update Notes
--------------------------------------------------------------------------------------
1.0
- Initial release
1.1
- Added the ability to enter kg or lbs, mm or in, and most importantly kph or mph.
1.2b
- Added the ability to figure in aerodynamic down-force
- Adjusted the calculations to make slightly stiffer results
- Fixed some tabbing index errors in 1.1
1.3b
- Fixed some calculations to more accurately represent motion ratios
- Removed some redundant conversion code that could slightly skew results
1.4b
- Added in the ability for the user to adjust overall suspension stiffness
1.5b
- Added damper calculations based off of spring weight and the cars drive-train
- Fixed some tabbing index errors that have persisted since 1.2b, but some still remain
1.51b
- After some testing I changed up the FR shock calculations a bit
2.0b
- Overhauled the UI entirely, making it a bit more stylish
- Changed the default overall suspension stiffness
- Changed the down-force calculations ever so slightly
2.1b
- Added some very rudimentary Anti-Roll Bar calculations
- Fixed a couple of typos in 2.0b
2.2b
- Added the ability to save your calculated setups to a text file
- Fixed a couple tab index errors, I think I almost have them all worked out now
2.21b
- Fixed the text file saving ability, sorry about the inconvenience. I somehow screwed it up right before I built it for release.
2.3b
- Changed up the Anti-Roll bar calculations. They are based on the weight, weight distribution, and drive-train of the car. This has not yet had much testing, please give me your feedback on whether or not it feels better then 2.21
- Fixed a bug where the Anti-Roll bar calculations were not clearing when the user pressed clear.
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