Maybe the aero drag from increased downforce is hindering it at high speeds?

Does anyone have the rear end gear / tire size for the z51 ready?
I would like to punch it into my gearing spreadsheet to see what the gearing looks like.

Thanks!

Here is gearing. Don't know tire sizes.

LOL

325 650 975 1300 1625 1950 2275 2600 2925 3250 3575 3900 4225 4550 4875 5200 5525 5850 6175 6500 rpm

Gears A 1st 2.5 5.1 7.6 10.2 12.7 15.3 17.8 20.4 22.9 25.4 28.0 30.5 33.1 35.6 38.2 40.7 43.3 45.8 48.3 50.9 mph
2nd 3.7 7.3 11.0 14.6 18.3 21.9 25.6 29.2 32.9 36.5 40.2 43.8 47.5 51.1 54.8 58.4 62.1 65.7 69.4 73.0
3rd 5.3 10.6 15.9 21.1 26.4 31.7 37.0 42.3 47.6 52.8 58.1 63.4 68.7 74.0 79.3 84.6 89.8 95.1 100.4 105.7
4th 7.6 15.1 22.7 30.2 37.8 45.3 52.9 60.5 68.0 75.6 83.1 90.7 98.2 105.8 113.4 120.9 128.5 136.0 143.6 151.2
5th 10.6 21.3 31.9 42.6 53.2 63.9 74.5 85.2 95.8 106.4 117.1 127.7 138.4 149.0 159.7 170.3 181.0 191.6 202.2 212.9
6th 13.3 26.5 39.8 53.0 66.3 79.6 92.8 106.1 119.3 132.6 145.8 159.1 172.4 185.6 198.9 212.1 225.4 238.7 251.9 265.2
7th 15.7 31.5 47.2 63.0 78.7 94.5 110.2 126.0 141.7 157.4 173.2 188.9 204.7 220.4 236.2 251.9 267.7 283.4 299.2 314.9


How do I post a spread sheet?...

As a pic... D'uh.

http://i40.tinypic.com/2hcmb7s.jpg

http://i43.tinypic.com/rvy6o2.jpg

So it has a little headroom there.
I'm thinking blower, twin turbos and 4 bottles of nitrous :D

(this is a joke, just fyi)