I guess I should update this thread with another calculation since this seems more appropriate now for my garage queen mach...
4th gear (1:1), trap speeds at 6100rpm (stock engine peak) 6500 rpm (minor bolt-ons shift point), 6800 rpm (psr/cobra cams shift point)
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26" tire:
Gear 6100rpm 6500rpm 6800rpm
3.55: 133 141.7 148.2
3.73: 126.5 134.8 141.1
3.90: 121 129 134.9
4.10: 115.1 122.7 128.3
4.30: 109.8 117 122.4
4.56: 103.5 110.3 115.4
28" tire:
Gear 6100rpm 6500rpm 6800rpm
3.55: 143.2 152.6 159.6
3.73: 136.3 145.2 151.9
3.90: 130.3 138.9 145.3
4.10: 124 132.1 138.2
4.30: 118.2 126 131.8
4.56: 111.5 118.8 124.3
4.88: 104.2 111 116.1
I'm on 4.56s right now, and I think that for the car's 10 year birthday this year (xmas 2013) it's time I stop messing around with N/A stuff and strap a bottle to it. Since I love the 4.56s on the street, and not wanting to shift into 5th at the track, I think a 28" slick will be in my future. I imagine a lot of the people in my situation, running out of bolt-ons and trapping over 110 are in the same boat; and adding a bunch more power requires either less gear or a bigger tire. For me bigger tire makes more sense - more traction, and keep the 4.56s and 26" tires on the street, if I ever drive it on the street again.