Just got a 91 4runner, v6 auto. I was hoping to find a 4 banger with 5spd to save on fuel, as these V6's look to be a pig on fuel. Anyways, the truck is basicly stock except it has 33" tires. My question is, what are some decent practical modifications to start out. I dont plan to go nuts off road, but I want to go have some fun. I am building a ARB style bush bar for the front and back, and my buddy's given me a decent winch for the front. What should I look into doing to it? save for suspension lift? Body lift? something else

Secondly, I know everyone tries to coax every last pony out of their motor, but I was wondering if there is anything I can do to add a few MPG's

 

The practicality of a differential locker, in the rear axle, can't be rivaled. Maybe, not as much funtionality having one in the front, unless a selectable unit. I'll suggest this common knowlodge, sorry, Keep tires inflated to Max. rec. press., Save $$$ gas station.

 

X2 on the locker. No need for a lift if your clearing the 33's just fine.

 

Welcome to yotatech! 1st you should find out what gears you have, there are a couple places that will decode the number on the the sticker inside the driverside door jamb. With an auto, I always suggest adding an aux. tranny cooler to help prolong the life of your tranny. There are a few options for IFS lifts, first I would wheel what you have to get an idea of what direction you want to go. During that time there is plenty of reading on here on the pros and cons of different lifts. I would also suggest manual hubs, it is an easy swap and will save some wear and tear on your front driveline and you may even pick up a mpg. Synthetics may help your mpg a little also. The autos suck to drive around the mountains and freeways and such, but they are great on the trail. You just learn to stick to the slow lane and enjoy the scenery a little more.

 

if you put some thumb tacks in your right boot that should help on gas mileage

 

I will second that if you don't have the correct gears in you diff's to run 33's then I would highly suggest that! If they are the factory gears then new gears will for sure add to an improved gas mileage, and power. Might as well through in some selectable lockers too!

 

x3... I also feel gears would help the most all around, but if you're going to that length, do yourself the favor and get a couple lockers. I run a detroit out back and a lunchbox up front and have no complaints or regrets.

 

So far what I have read about getting some extra mileage from this motor, is re-gearing, of course a tune up with plug, wires, cap ect. Maybe a O2 sensor. Some have said the K&N, and intake mods makes some difference, and so does a exhaust system. But to me the intake and exhaust mods, while making the motor flow much better, is going to bring more air into the motor, thus more fuel. Maybe Im wrong, what have others found to save some go juice?

 

any info on the exhaust question?

 

Exhaust definitely helps power, but depending on how you drive it after the exhaust your mileage can actually go down.

My recommendation was going to be gears and at least a rear locker too...

 

the most practical tip is drive slower.