Originally Posted by velociabstract

This post is premature. It will require patience for a final conclusion. If you get too excited and can’t wait I recommend a daily regimen of Scotch, Whiskey, Vodka or like liquor. In a pinch you can resort to wine.

Thanks to Grip (Anthony) I’ll be taking the leap to a 3.27 carrier and thanks to Rudy it’ll work. Changing from a 3.07 to 3.27 is a small step to say the least. I took the time to approximate the speed differences at gear changes. (255/50/16 drag radials)

Here's my calculated mph at 6100 with the 3.07 (not exact but close)
1 rst 42.9
2 nd 70.3
3 rd 109.2
4 th 154.00
5 th 185.50

Here's my calculated mph at 6100 with the 3.27 (not exact but close)
1 rst 40.3
2 nd 66
3 rd 102.5
4 th 144.6
5 th 174.2

Here's my calculated mph at 6400 with the 3.27 (not exact but close)
1 rst 42.3
2 nd 69.3
3 rd 107.1
4 th 151.7
5 th 182.7

The shift points at 6100 put me before peak torque after the gear change. 6400 puts me at peak torque after the gear change. Average hp after the 6400 gear change is +15. I don’t expect the mph in the ¼ to change at all from the 3.27. If I’m correct, the ET will drop .1 just from the torque multiplication at launch and for the first 60’ or so. The raised rev limit should gain me another .1. Don’t you just love speculation? The carrier is in the mail and if the Ground Control suspension comes out in the next week or so I’ll consolidate the installations and get the pain over with in one swoop.

I used a 6400 TCU once on the dyno and once at the roundy round track. I didn’t see a lean issue so hopefully I’m good. If not I’ll go the regulator and un regulated fuel filter route. What say you?

All criticism, doom sayers, fan bois, etc. are welcome to opine on the raised rev limit and my data.

Les