[rcweingart]

For me, yes, the 6 speed is for only going 200+ mph and for long trips where you want the rpms to drop a bit and for mileage. You can get a TKO 600 5 speed with a 0.62 5th if you want to go over 200 mph but the 4/5 split is terrible and all you really have is a 4 speed with a long overdrive. Here is the gearing chart from the Second Strike Gearing Calculator for what you will probably end with. Figure on 6200 rpm until warranty has expired and then 6500 rpm. As you can see, top speed at max rpm is 180 - 195 mph assuming you can get up to max rpm. My DFI engine reaches peak HP at about 6200 rpm so based on that and the Cd, I figure that I'm good for 185+ mph should I want try to go for bragging rights which I don't. My car is set up just fine as a high speed GT, A/C works fine, remote door poppers (both doors and hatch), stereo and I put in power windows (major undertaking). Easy to drive, great on the track, and an eye catcher for all those who see it.

The forum won't let me format the columns so the numbers don't line up well but you should be able to figure it out.

Tremec TKO-600 5-speed (0.82 5th) with 3.46 gears and 295/45/19 tires
Speed (MPH) in Gears at RPM

Gear | 1st | 2nd | 3rd | 4th | 5th
Trans Ratio |2.87|1.89|1.28 |1.00|0.82
Overall Ratio|9.93|6.54|4.43|3.46|2.84
Split 1.52 1.48 1.28 1.22
Rev/Mile |6,998|4,609|3,121|2,438|2,000
1500 | 13 | 20 | 29 | 37 | 45
2000 | 17 | 26 | 38 | 49 | 60
2500 | 21 | 33 | 48 | 62 | 75
3000 | 26 | 39 | 58 | 74 | 90
3500 | 30 | 46 | 67 | 86 | 105
4000 | 34 | 52 | 77 | 98 | 120
4500 | 39 | 59 | 87 | 111 | 135
5000 | 43 | 65 | 96 | 123 | 150
5500 | 47 | 72 | 106 | 135 | 165
6000 | 51 | 78 | 115 | 148 | 180
6500 | 56 | 85 | 125 | 160 | 195