order of tuning things

[TVR27]

I start with the power and try to get the best 0 - 100Km/h then I test the brakes if it has trouble stopping at 300Km/h I lower the speed then I fix the suspension.

 

[coryclifford]

…and try to get the best 0 - 100Km/h

What's the point of that?

 

[CBH]

What does this mean ?

I start with the power and try to get the best 0 - 100Km/h

 

[Khronokai]

0-60mph. Checking to see how the tires and suspension hook up from a launch. Also adjusting gears to match.

 

[eran0004]

The gearbox ratio values change, depending on the position of the sliders when a part swap is done. It can make a mess of some finely tuned ratios.

I always redo my gearbox after a part swap.

Can you specify? Because I don't see any change in the gear ratios when I add or remove power upgrades to the engine.

• What gearbox are you using (stock/close ratio/customizable)?
• What are the ratios before you install the power upgrades?
• What power upgrades do you install?
• What are the ratios after you have installed the power upgrades?

 

[DolHaus]

Can you specify? Because I don't see any change in the gear ratios when I add or remove power upgrades to the engine.

• What gearbox are you using (stock/close ratio/customizable)?
• What are the ratios before you install the power upgrades?
• What power upgrades do you install?
• What are the ratios after you have installed the power upgrades?

Start with a stock car, make a note of the ratios
Add the upgraded ECU and hit the reset transmission button
The numbers have changed

 

[eran0004]

Start with a stock car, make a note of the ratios
Add the upgraded ECU and hit the reset transmission button
The numbers have changed

Of course they do, because you reset the transmission. When you do that, it will recalculate the ratios to achieve the set top speed, since the engine speed increased.

But if you don't hit that button it will leave the ratios as they were.

 

[DolHaus]

Of course they do, because you reset the transmission. When you do that, it will recalculate the ratios to achieve the set top speed, since the engine speed increased.

But if you don't hit that button it will leave the ratios as they were.

True, but if you are trying to rebuild someones transmission that has been tuned with the upgraded power parts then you may not be able to reach the specified ratios, this is the point of the original question

 

[eran0004]

True, but if you are trying to rebuild someones transmission that has been tuned with the upgraded power parts then you may not be able to reach the specified ratios, this is the point of the original question

You may not be able to follow those specific instructions, but the gear ratios can still be achieved as long as they're not too extreme. If you find the correct ratios and set them before you install the engine upgrades it will be exactly the same as if you had set the ratios after the engine upgrades.

 

[DolHaus]

You may not be able to follow those specific instructions, but the gear ratios can still be achieved as long as they're not too extreme. If you find the correct ratios and set them before you install the engine upgrades it will be exactly the same as if you had set the ratios after the engine upgrades.

Again true, but irrelevant

 

[eran0004]

Again true, but irrelevant

It's not irrelevant, because this specific advice was shared here:

The transmission is dependent on these two variables. The transmission's gear ratios are based on the power of the car. If you have a transmission setup for 450 HP, then you upgrade the power to 500 HP, the transmission would be altered; and it wouldn't fare too well with more power since the ratios would be longer than what you set it up to be.

This also applies if you have 800 HP with the engine power at 100%. If you set up the transmission for the 800 and de-tuned the engine power to 50%, which is 400 HP, then the transmission's gears would be too short. Same goes for vice versa.

In short, set up the transmission AFTER you mess around with the engine. The other settings will not change your transmission setup, by the way.

^ That is wrong, gear ratios are not based on the power of the car.

 

[nowcontrol]

My statements are not wrong.....it's simple...

Grab yourself a stock car and fit the custom transmission.

Now add all power parts in the left column, for most cars this will position sliders 1-5 all to the left and put 6th out of alignment, meaning the ratios are now [a bit] messed up.

Now remove all those parts, the ratios will hold the values applied from adding those parts, meaning that removal of parts does not re-adjust the ratios and they are still a mess and can only be the same [original] again via manual adjustment or a reset.

This will happen mostly the same for any custom ratio settings.

With every part swap made I would advise a reset and manual re-adjustment to regain your preferred ratios.

 

[Winters Noble]

My routine run is power, lsd, then suspension.

 

[eran0004]

My statements are not wrong.....it's simple...

Grab yourself a stock car and fit the custom transmission.

Now add all power parts in the left column, for most cars this will position sliders 1-5 all to the left and put 6th out of alignment, meaning the ratios are now [a bit] messed up.

Now remove all those parts, the ratios will hold the values applied from adding those parts, meaning that removal of parts does not re-adjust the ratios and they are still a mess and can only be the same [original] again via manual adjustment or a reset.

This will happen mostly the same for any custom ratio settings.

With every part swap made I would advise a reset and manual re-adjustment to regain your preferred ratios.

Okay, now I see. What happens is that when you change the engine speed the available ranges for each ratio are recalculated and if the old value is too low or too high it will be capped at the min/max value instead.

 

[nowcontrol]

Okay, now I see. What happens is that when you change the engine speed the available ranges for each ratio are recalculated and if the old value is too low or too high it will be capped at the min/max value instead.

Yes, and sometimes it will make hardly any visually noticeable difference to the ratio arrangements [until you examine the values] and other times the mess it has made to them is blindingly obvious.

It's all dependent on how they are spread out and which or how many parts you swap.

 

[Khronokai]

I've always viewed the build and tuning separately.

The whole build will be up to you or the specifications of the race. Obviously the chassis, drive line, power and tire grip are going to be altered.

First I go to the LSD and lower the initial TQ and deacceleration, leave the acceleration.
From there I always do the springs and shocks, driving around to get a feel for the overall balance.
Adjust the LSD and gears.
From there its fine tuning everything for smoothness.