[cerealwars]

lol Dude's exaggerating a little but he does have a point.

I just downloaded a gear ratio/speed calculator Excel spreadsheet from a site called gearboxman. I put in the factory ratios for a 350z CD009 transmission.

Cruising at 75mph will put your engine at about 3700 rpm (which is a lot, but it's certainly no 5500).

Since a CD009 6th gear (0.794) isn't really that much different than a 71C fifth gear (0.759), cruising isn't really the problem with the 6-speed. That extra neutral-time spent due to the extra gear is what gets you. You shift four times to get to the same place (CD009 5th gear is 1:1, whereas on the 71C 4th gear is 1:1) instead of the three times you would with the 5-speed.

However, if this is a straight up NA drift car and you run some smaller tracks, I'd say it might offer some advantages if you're someone who wants a narrow RPM band. It could offer the exact solution you need if you're having a problem in certain corners where 2nd gear runs out of leg, but third is too much of an rpm-drop.