Fairlady Z34 08 drifting gear ratio?
- Thread starter Macapaca
- 3 comments
- 1,454 views
- 2,298
- Sauga City
- Bluntified
I usually just set the top speed 3 notches lower. As for individual gear ratios, you gotta play with that yourself!
- 271
- United States
- The__Ghost__Z
Find a car you normally drift with fine.
Take the RPM you drift at x the torque at that RPM (for example, you may drift at the high RPM but only get 75% of the max torque there, or at the low RPM and get the full amount) x gear ratio for that drift/speed x final gear ratio.
Divide that by the weight over the rear tires. Now do the same for the Z34, and adjust it so that the numbers you get for both of them at the end are identical.
Then, increase the gear ratio by .1 or so incrementally for each of the following, if the car you started off with:
1. Has narrower tires
2. Has a more flat torque band
3. Has less toe-in at rear
4. Has less camber at rear.
5. Has less downforce at rear
Decrease gear ratio on Z34 if the car you started with:
1. Has wider tires
2. Has a more "peaked" torque curve
3. Has less toe-in at rear
4. Has less camber at rear
5. Has less downforce at rear.
Afterwards, if the Z34 is still dropping out of the torque band (it shouldn't be unless you are used to extremely high powered cars) reduce toe-in at rear, increase camber at rear, reduce downforce at rear. This will give you a wider range where the tires will still spin, meaning that even without adding torque through gear ratios, you can afford to drop lower and still drift. If that doesn't work, then start increasing the final gear ratio even more incrementally until you feel comfortable. Also, play with LSD settings, reducing them if you have too much wheelspin and increasing them if you do not. A high LSD settings (almost a locked LSD) will delay the rate at which the outside tire catches traction, giving you even more time to keep in the power band.
This is a general rule of thumb, better than guessing and gives you a good place to start. It isn't as exact as I normally do it, but it's exact enough for most people. This saves you the trouble of using integrals, adjusting for individual-speed corners, and trying to guess a formula for the shape of the torque curve.
Take the RPM you drift at x the torque at that RPM (for example, you may drift at the high RPM but only get 75% of the max torque there, or at the low RPM and get the full amount) x gear ratio for that drift/speed x final gear ratio.
Divide that by the weight over the rear tires. Now do the same for the Z34, and adjust it so that the numbers you get for both of them at the end are identical.
Then, increase the gear ratio by .1 or so incrementally for each of the following, if the car you started off with:
1. Has narrower tires
2. Has a more flat torque band
3. Has less toe-in at rear
4. Has less camber at rear.
5. Has less downforce at rear
Decrease gear ratio on Z34 if the car you started with:
1. Has wider tires
2. Has a more "peaked" torque curve
3. Has less toe-in at rear
4. Has less camber at rear
5. Has less downforce at rear.
Afterwards, if the Z34 is still dropping out of the torque band (it shouldn't be unless you are used to extremely high powered cars) reduce toe-in at rear, increase camber at rear, reduce downforce at rear. This will give you a wider range where the tires will still spin, meaning that even without adding torque through gear ratios, you can afford to drop lower and still drift. If that doesn't work, then start increasing the final gear ratio even more incrementally until you feel comfortable. Also, play with LSD settings, reducing them if you have too much wheelspin and increasing them if you do not. A high LSD settings (almost a locked LSD) will delay the rate at which the outside tire catches traction, giving you even more time to keep in the power band.
This is a general rule of thumb, better than guessing and gives you a good place to start. It isn't as exact as I normally do it, but it's exact enough for most people. This saves you the trouble of using integrals, adjusting for individual-speed corners, and trying to guess a formula for the shape of the torque curve.
Last edited:
Similar threads
Latest Posts
-
-
-
-
Car of the Week | Mazda Eunos Roadster (NA Special Package) '89- Latest: XSquareStickIt
-