8.8 3.55 to 4.10 Gas Mileage

[GoGoggansGo]

My old man thinks I will ruin my gas mileage by putting 4.10s in my 4.0 ranger. I have heard it might drop a little or stay the same, and even heard the mileage might improve. Any info will help thanks.
8.8 3.55 stock

 

[Sunk]

What size tire? Auto or manual trans?

 

[GoGoggansGo]

What size tire? Auto or manual trans?

5 speed
P225/70R14 S

 

[4.0B2]

who cares.... just do it.
i bet it won't change much.
idk for sure tho.

 

[GoGoggansGo]

who cares.... just do it.
i bet it won't change much.
idk for sure tho.

I going to anyways I don't give two shits, but he cares about gas mileage lol I don't

 

[Gotta_gofast]

That'll put you around 2350rpm @ 60mph in overdrive! I am going to guess you'll drop 2-3mpg.

 

[GoGoggansGo]

That'll put you around 2350rpm @ 60mph in overdrive! I am going to guess you'll drop 2-3mpg.

So really 20 to 22 on the HWY I am not complaining at all, and the only reason the gas mileage will drop is because the tires are much bigger than the smaller one used on the 3.0 and 4 cylinder correct

 

[Gotta_gofast]

Actually the old 3.0L I used to own came factory with larger tires than what you have. I have 4.10 gears in my truck with 265/70/R16 (30.6") and my tach sits just a hair above 2K mark at 60mph.

 

[GoGoggansGo]

Actually the old 3.0L I used to own came factory with larger tires than what you have. I have 4.10 gears in my truck with 265/70/R16 (30.6") and my tach sits just a hair above 2K mark at 60mph.

cool never knew that put she is an 93 though. Hold on my info might be wrong I have the biggest tires an none 4X4 can have. sorry that I don't if those are my tires or not

 

[Gotta_gofast]

My old 3.0L splash was a 93 also.

The 4.10s will make your truck feel like a tractor down low, but the old OHV engines dont breathe so well on top so you will be trading off top end acceleration and the raised rpm will really hurt fuel mileage on the highway. On the upside, you will have no problem turning a larger tire if you wanted to.

 

[GoGoggansGo]

My old 3.0L splash was a 93 also.

The 4.10s will make your truck feel like a tractor down low, but the old OHV engines dont breathe so well on top so you will be trading off top end acceleration and the raised rpm will really hurt fuel mileage on the highway. On the upside, you will have no problem turning a larger tire if you wanted to.

My heads and intake are ported so will it really make the truck acceleration that much better, and on the highway 70 75 is all I really run because I don't have cruise

 

[Gotta_gofast]

Even with ported heads you're peak power will drop off around 4000rpm (at the very best). With a mild cam you can push it a little farther. Like I said, it'll pull real hard down low with the low end torque (unless the ported heads killed your intake velocity, then you'll lose your torque) and the 4.10 gears but it won't keep that "momentum" when you're winding the motor out. Just facts about the OHV man. My buddy's 93 ranger 2wd came with the 4.0L and 5 speed. He could do donuts in the road with the low end torque that had, but get it wound out around 70mph and it would start to fall on its face. Since then we've swapped his drivetrain out for a 2.3L turbo motor which feels just as strong in the midrange and makes gobs more power on top. Just a thought, 2.3L turbo... hint hint. lol

 

[GoGoggansGo]

Even with ported heads you're peak power will drop off around 4000rpm (at the very best). With a mild cam you can push it a little farther. Like I said, it'll pull real hard down low with the low end torque (unless the ported heads killed your intake velocity, then you'll lose your torque) and the 4.10 gears but it won't keep that "momentum" when you're winding the motor out. Just facts about the OHV man. My buddy's 93 ranger 2wd came with the 4.0L and 5 speed. He could do donuts in the road with the low end torque that had, but get it wound out around 70mph and it would start to fall on its face. Since then we've swapped his drivetrain out for a 2.3L turbo motor which feels just as strong in the midrange and makes gobs more power on top. Just a thought, 2.3L turbo... hint hint. lol

O i agree completely the heads where mildly ported in a sense the master tech who did the job said if you went to far porting the head, and gutted it up would hurt you more than not. So the intake was our primary focus we got the job done in less than 1 day started at 9 am and got done at 7 pm and was running. So what you are saying is that 1 through 3rd gear will be like a freight train, and 1st gear will spin like no other. If this is true I am doing it no question

 

[Sunk]

I have 4.10s and 225/70 R15s on my truck and at 65-70 I'm right around 3K... That's higher than you want to be with a 4.0.

With a 4.0 and 4.10s you're set up for 31s.

 

[Gotta_gofast]

I'm suprised you don't have a hard time with traction now with them small tires. My truck with the larger tires and a rear locker lights em up effortlessly.

But basically first and second will feel strong, but as you approach the right side of your tachometer in any gear (which will come quicker with deeper gears) the truck will get less exciting. The 4.0L OHV makes a great motor for towing and offroading where the motor spends most of its time below 3000rpm. Most guys who look to improve the truck to "go faster" will swap to an entirely different drivetrain because the 4.0L just doesn't cut it.

In its simplest form, you are gaining a lot of acceleration down low at the expense of top speed and fuel mileage. You might find with the 4.10s that a better set of tires will be required. A wider tire on a 15" rim will regain that traction to launch.