wahlstrom1

I'm putting together more parts for my LQ4 swap into my 97 ranger and have run across an issue. I am currently running 4.56's with 35's and run 2400RPM at 65mph which is great with the 4.0L v6 but I'm unsure of this setup with the 6.0L. I'll be effectively doubling my HP and getting a 50% increase in TQ with the 6.0L, and am looking to run a 38" tire in the future. My truck weighs around 4700lbs+- 200lbs with any given daily load.

I can run these different options giving me 4 different choices, if you guys have an idea of what would work best, please let me know.

6.0/NV3500/NV241

4.56 - 35s - 2173
5.13 - 35s - 2445

4.56 - 38 - 2000
5.13 - 38 - 2250

GMCtrk

iTrader: (27)

The sweet spot on the 6 liter for gas mileage is about 1700 rpms. Unfortunately, the torque there isn't adequate (at least for me on highway cruising). So now I cruise @ 70 around 2100 rpms with 4.10 gears and 31" tires and I like it a lot better. Throttle response is tighter, gas mileage went down about 2-3 MPG's though, no big deal. Truck probably weighs 4650 without me in it.

1Bear

iTrader: (1)

While I have no idea of what your planning on doing with your truck, the LS type motors tend to get the mileage turning somewhere around 1700 to 1900 rpm when cruising down the highway. So if that is what your concerned about, stay with with the 4.56's. If your wanting to go rock crawling and damn the mileage the lower gears will help. By the way, that little fellow is still pretty damn heavy. I'd have to say though, if you were content with the six, the 6.0L should should flip your wig!

wahlstrom1

The 4.0L is basically a small ford FE 390, makes stupid torque for it's size down low but falls on it's face in the upper end. I'm gaining .40 in gearing in first gear in the tranny, and another .30 in the transfercase when compared to the stock ranger ratios so the low end of things shouldn't be hurting much.

I daily drive the truck, put on about 30-35,000km's a year and use it for everything from wheelin to towing and everything in between. I get 18mpg now hwy, and around 14 in town so I'd like to keep around the same mileage if possible.

It's a flying brick going down the road, more then 24" clearance under the frame rails with winch bumper and no aerodynamic considerations at all.....oh, and stock weight was around 4200lbs.