gear ratio comparison

i got this Gear Ratio Calculator from QUAIFE and calculated the stock Mazda3 gearbox and the stock Ford Focus gearbox... the comparison is based on my 18 daily driven wheel and 7000rpm shift point....


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Gearbox:- G35M-R (mazda3)
Tyre:- 225/40/18
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1st - 3.307
2nd - 1.842
3rd - 1.310
4th - 0.970
5th - 0.755
Reverse - 3.166
Final drive - 4.388
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Top Gear gives 36.254 KPH/1000 RPM and a top speed of 253.779 KPH at 7000 RPM

Engine speeds in top gear:-
40 KPH = 1103 RPM 50 KPH = 1379 KPM 60 KPH = 1655 RPM 80 KPH = 2207 RPM
100 KPH = 2758 RPM 110 KPH = 3034 RPM 130 KPH = 3586 RPM 160 KPH = 4413 RPM

Top Speed in 1 gear = 57.939 KPH
And changes into 2 gear at 3899 RPM dropping 3101 RPM
Top Speed in 2 gear = 104.019 KPH
And changes into 3 gear at 4978 RPM dropping 2022 RPM
Top Speed in 3 gear = 146.262 KPH
And changes into 4 gear at 5183 RPM dropping 1817 RPM
Top Speed in 4 gear = 197.529 KPH
And changes into 5 gear at 5448 RPM dropping 1552 RPM
Top Speed in 5 gear = 253.779 KPH
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Gearbox:- MTX75 (ford focus)
Tyre:- 225/40/18
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1st: 3.42
2nd: 2.14
3rd: 1.43
4th: 1.03
5th: 0.77
Final Drive: 4.06
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Top Gear gives 38.570 KPH/1000 RPM and a top speed of 269.991 KPH at 7000 RPM

Engine speeds in top gear:-
40 KPH = 1037 RPM 50 KPH = 1296 KPM 60 KPH = 1556 RPM 80 KPH = 2074 RPM
100 KPH = 2593 RPM 110 KPH = 2852 RPM 130 KPH = 3370 RPM 160 KPH = 4148 RPM

Top Speed in 1 gear = 60.604 KPH
And changes into 2 gear at 4376 RPM dropping 2624 RPM
Top Speed in 2 gear = 96.949 KPH
And changes into 3 gear at 4745 RPM dropping 2255 RPM
Top Speed in 3 gear = 143.013 KPH
And changes into 4 gear at 4970 RPM dropping 2030 RPM
Top Speed in 4 gear = 201.442 KPH
And changes into 5 gear at 5223 RPM dropping 1777 RPM
Top Speed in 5 gear = 269.991 KPH
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atm the MTX75 is shorter ratio, which what i want, but the final drive is too low.... which make the top speed too high....

i dont really need top speed. this is why i need to upgrade the final drive on the MTX75 from 4.06 to 4.6.... i will loose the top speed but gain more acceleration....