Improve gas mileage on a 427 so ?

[joyridin']

Originally Posted by bwcobra15

If i had the IRS from Hurricane i could do with the 6-speed but with a Ford 9" live axle i'm afraid the u-joints would bind or wear out fast.

I did about 200 miles this weekend and did observe i'm at 2800 rpm at 80 mph.

Agree. Definitely do not want to go that route with a 9". That isn't real bad, but with a 9", you can drop the 3rd member out of there pretty fast and throw in a lower gear ratio.

[bwcobra15]

Originally Posted by joyridin'

Agree. Definitely do not want to go that route with a 9". That isn't real bad, but with a 9", you can drop the 3rd member out of there pretty fast and throw in a lower gear ratio.

Correct. I'm looking at going from 3.50:1 to something like 3.27:1 at some point in the future.

(Unless I hit a rich uncle inheritance, powerball, etc ... in which case i'll upgrade to Hurricane IRS and T56 Magnum 6speed!)

[Anthony]

Originally Posted by bwcobra15

Correct. I'm looking at going from 3.50:1 to something like 3.27:1 at some point in the future.

With a 427 cid, and the TKO600 2.87 1st gear, you can run a 3.07/3.08 rear, or something like that. It would work fine, and then with the .82 5th, it would be great for cruisin. That's what I'd recommend. I wouldn't change to a 6 speed. Just change the rear.

I ran a wide ratio TL, 2.78 1st, with a 3.07 rear, and it was fine. And then crusin was pretty good for just a 4 speed.