I made this a sticky as its very useful for anyone wanting to play about with wheel sizes and see what difference the make.
http://www.f-body.org/gears/ (http://www.f-body.org/gears/)
As per the other thread from a few days back, the stock FD box ratios are:
1st 3.483
2nd 2.015
3rd 1.391
4th 1.000
5th 0.719
FWIW, my setup with 265/35/18s gives 102mph @ 4000 rpm per the calculator; this compares to 91mph in car, assuming the tach (FC Commander/dash) is accurate and the GPS is on the money. So its a reasonable indicator.
Here\'s the results for a stock FD gearbox 20b diff which is 3.9:1 and 265/40R17\'s on the rear.
I was going to go bigger wheels this year but may not bother now!:wave
REVS 1st 2nd 3rd 4th 5th
| 5000 | 28 | 48 | 69 | 97 | 134 | |
| 5100 | 28 | 49 | 71 | 99 | 137 | |
| 5200 | 29 | 50 | 72 | 101 | 140 | |
| 5300 | 29 | 51 | 74 | 102 | 143 | |
| 5400 | 30 | 52 | 75 | 104 | 145 | |
| 5500 | 31 | 53 | 76 | 106 | 148 | |
| 5600 | 31 | 54 | 78 | 108 | 151 | |
| 5700 | 32 | 55 | 79 | 110 | 153 | |
| 5800 | 32 | 56 | 81 | 112 | 156 | |
| 5900 | 33 | 57 | 82 | 114 | 159 | |
| 6000 | 33 | 58 | 83 | 116 | 161 | |
| 6100 | 34 | 59 | 85 | 118 | 164 | |
| 6200 | 34 | 59 | 86 | 120 | 167 | |
| 6300 | 35 | 60 | 88 | 122 | 169 | |
| 6400 | 36 | 61 | 89 | 124 | 172 | |
| 6500 | 36 | 62 | 90 | 126 | 175 | |
| 6600 | 37 | 63 | 92 | 128 | 177 | |
| 6700 | 37 | 64 | 93 | 130 | 180 | |
| 6800 | 38 | 65 | 95 | 131 | 183 | |
| 6900 | 38 | 66 | 96 | 133 | 186 | |
| 7000 | 39 | 67 | 97 | 135 | 188 | |
| 7100 | 39 | 68 | 99 | 137 | 191 | |
| 7200 | 40 | 69 | 100 | 139 | 194 | |
| 7300 | 41 | 70 | 101 | 141 | 196 | |
| 7400 | 41 | 71 | 103 | 143 | 199 | |
| 7500 | 42 | 72 | 104 | 145 | 202 | |
| 7600 | 42 | 73 | 106 | 147 | 204 | |
| 7700 | 43 | 74 | 107 | 149 | 207 | |
| 7800 | 43 | 75 | 108 | 151 | 210 | |
| 7900 | 44 | 76 | 110 | 153 | 212 | |
| 8000 | 44 | 77 | 111 | 155 | 215 | |
ok that\'s handy, anyone have the axel and gear ratios for the FC to hand?