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Discussion Starter #1 (Edited)
I found C-ONE(Kazz) closed gear set and final gear when I surfing the internet.
I am much interested in final gear.
The close gear set is much expensive and need more gear change.
C-One final gear will change gear ratio from 4.529 to 4.8
That will more accelerate than stock final gear and not need more
gear change in the most of case.

I live in South Korea near Japan.
C-ONE is the Japaness company for Toyota tuning parts like TRD.
I ordered Final Gear(ratio 4.8) and it will arrive next week.

I think C-ONE gear will 6% more accelerate.

I study some track data and conclude new one will helpful
such as 30 to 60 , 60 to 100 which are dominant in the most track driving.

I will install next week.

I want to find other customer who install this but I cannot find one.
My experience will helpful who want to better laptime below max 220km/h
circuit.


Below is the RPM and velocity(km/h) comparable.
The velocity will be settled real velocity(about 97% of theoritical velocity=near GPS velocity)

Stock Final Gear(4.529)

Gear Final G*F 1000 1500 2000 2500 3000 3500 4000 4500 5000 5500 6000 6500 7000 7500 8000 8500
3.116 4.529 14.112364 8.2 12.3 16.4 20.5 24.6 28.7 32.9 37.0 41.1 45.2 49.3 53.4 57.5 61.6 65.7 69.8
2.05 4.529 9.28445 12.5 18.7 25.0 31.2 37.5 43.7 49.9 56.2 62.4 68.7 74.9 81.2 87.4 93.6 99.9 106.1
1.481 4.529 6.707449 17.3 25.9 34.6 43.2 51.8 60.5 69.1 77.8 86.4 95.1 103.7 112.3 121.0 129.6 138.3 146.9
1.166 4.529 5.280814 22.0 32.9 43.9 54.9 65.9 76.8 87.8 98.8 109.8 120.7 131.7 142.7 153.7 164.6 175.6 186.6
0.916 4.529 4.148564 27.9 41.9 55.9 69.9 83.8 97.8 111.8 125.7 139.7 153.7 167.6 181.6 195.6 209.6 223.5 237.5
0.815 4.529 3.691135 31.4 47.1 62.8 78.5 94.2 109.9 125.6 141.3 157.0 172.7 188.4 204.1 219.8 235.5 251.2 266.9


C-ONE final gear(4.8)

Gear Final G*F 1000 1500 2000 2500 3000 3500 4000 4500 5000 5500 6000 6500 7000 7500 8000 8500
3.116 4.8 14.9568 7.75 11.63 15.50 19.38 23.25 27.13 31.00 34.88 38.75 42.63 46.50 50.38 54.25 58.13 62.00 65.88
2.05 4.8 9.84 11.78 17.67 23.56 29.45 35.34 41.23 47.12 53.01 58.90 64.79 70.68 76.57 82.46 88.35 94.24 100.13
1.481 4.8 7.1088 16.31 24.46 32.61 40.77 48.92 57.07 65.22 73.38 81.53 89.68 97.84 105.99 114.14 122.30 130.45 138.60
1.166 4.8 5.5968 20.71 31.07 41.42 51.78 62.13 72.49 82.85 93.20 103.56 113.91 124.27 134.62 144.98 155.33 165.69 176.05
0.916 4.8 4.3968 26.36 39.55 52.73 65.91 79.09 92.27 105.46 118.64 131.82 145.00 158.18 171.37 184.55 197.73 210.91 224.09
0.815 4.8 3.912 29.63 44.45 59.26 74.08 88.89 103.71 118.52 133.34 148.16 162.97 177.79 192.60 207.42 222.23 237.05 251.86


Week point
1 to 2 gear / 65 to 70km/h = 40 to 44 mi/h
2 to 3 gear / 100 to 106km/h = 62 to 66 mi/h
3 to 4 gear / 138 to 147km/h = 86 to 91 mi/h
4 to 5 gear / 176 to 186km/h = 110 to 116 mi/h
5 to 6 gear / 224 to 237km/h = 140 to 148 mi/h
I think more accelerate will be compansate above 3rd gear week point.

Before this mod My car has max 152mi/h(243.3km/h) speed measured by Drift Box GPS acquisition.
I wonder after Mod(final gear change) how the max speed will changed. Even if the max speed is not major factor of Lotus Performance.
 

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Sounds cool. Just factor in the time of the extra shifts.


My opinion is, if you plan on supercharging or turbo-ing, you should stay away from this. With a supercharger, redline arrives so quickly that you barely have time to move your hand between shifts. This kit, I imagine, would make it virtually undriveable.


If you plan on remaining NA, this sounds good :)
 

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Frank/Ronin upgraded his 6th gear a while ago. You can ask him about it at monkeytuner.com
 

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Discussion Starter #4
Sounds cool. Just factor in the time of the extra shifts.


My opinion is, if you plan on supercharging or turbo-ing, you should stay away from this. With a supercharger, redline arrives so quickly that you barely have time to move your hand between shifts. This kit, I imagine, would make it virtually undriveable.


If you plan on remaining NA, this sounds good :)
IS only 6% give a significant difference in shifting.
I think, even if supercharging, just 0.2~0.3 seconds difference for shifting from 1st gear to 2nd gear. And there are times to shifting from 2nd to 3rd gear.

NA stock
1st gear -> 2nd gear 40mph shifting (2.1 second to 40mph)
shifting time -> 0.2 second
2nd gear -> 3rd gear 40mph -> 62mph shifting (3.0 second to 62mph)

NA C-ONE final gear(4.8)
1st gear -> 2nd gear 38mph shifting (1.9 second to 38mph)
shifting time -> 0.2 second
2nd gear -> 3rd gear 38mph -> 60mph shifting (2.7 second to 60mph)

Supercharging ??
I couldn't calculate becase of no real data.

I think general track driving has no chance to shift down to 1st gear.
So I think you will not worry about shifting timing even if supercharging.
I only worry about for auto-x. Becase auto-x mainly use 1st and 2nd gear.
 
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