Sorry, please redirect me of there is another thread on this but I am in the market for all terrain tires for my 88 pickup. I am thinking about getting a set of 32x11.5 bfg all terrains. Too big for stock gearing?

 

Only you know just what you want for performance.

I am quite happy running my 235/75/15 tires on all my Toyota

 

31x10.50s should fit with no problem. However I would definitely check your gear ratios first. 32s with any thing under 4.10s will make 5th gear all most useless IMOP. If you are blessed with 4.56s or by some grace of the Toyota gods 4.88s then 32s should be very manageable.

 

Anyone know how I can find my rear end ratio?

 

Assuming your gears have not been altered from factory specs....

See this:

http://www.lcengineering.com/LCTechP...ARJANUARY.html

 

Major "can of worms" question! Some ppl will tell you they run 40s with stock gears with no problem.

Typical rule of thumb

31s and smaller stock 4.10s
32s 4.56
33s 4.88
35 and up 5.29s

I currently have 235/75r15 wildcats with nice aggressive tread Stock suspension except AAL in rear. It does awesome in the mud I can floor it in the mud and dont stress stuff breaking cause not much stress on stuff.

TREAD PATTERN is more important then size but you wanna match both to your desired application (terrain)

eventually I wanna go to 33s with 4.88s with mt tread but might settle with some 32s so less stress on everything. Also you can match the gearing to the tire size but it doesn't fully help with the increased mass of the tires.

 

22RE+31s=4.30s or higher no question about it. The 22RE is already under powered throwing bigger rubber on it with out proper gearing is definitely not going to make for a fun truck.

 

Hi everyone, ended up going with 32x11.5 mt tires. going do be driving my 88xtra cab beater til I can afford 4.56 gears. Thanks for your input! Greatly appreciated.

 

Go 4.88s and be done with it since your already running 32s. It will give you the flexibility to run 31-33 inch tires in the future.

 

I'm running 4.88 with 35s no issues. Agree doing 4.88 will give you more flexibility. Had 4.10 with 33's when I got the truck, was drivable just slow.

 

I got around 31's on my 86 2wd 22r truck and pulling 25-30mpg after account for the tire size difference. 3:42 gearing (factory) with the 5 speed. Have to ride the clutch a lot in first gear, but once it is moving it does fine empty, hulling a load is when the high gearing + larger sized tires starts to show problems.

Gearing is all based on what you expect and how good your engine is at low end torque. The 22r has a ton of bottom end, and since I've been driving a 96 tacoma with the 3.4L and 4:10 gearing, I really miss the bottom end grunt the 4 cyl had, even though the v6 clearly has more power, it just can't lug down nearly as much.

 

I think Toyota had it right. 31s on 4:56. You can do 31 on 4:10 but a little heavy, and bigger then 31 and 4:88 or better. Imho.

 

Sorry brother but I am calling BS on both the above statements. First off let's compare the two on paper.

5VZ-E
190HP @ 4800RPMs
220 ft-tq @ 3600RPMs

22RE
118HP @ 4800 RPMs
140 ft-tq @ 3600 RPMs

Thats a huge diffrence in power and torque across the board. Clearly the 3.4 has a much wider power band with way more low end grunt. Even the 3VZ-E out performs the 22RE in low end power and is favored over the 4 banger for towing. Second 3.42 vs 4.10s is a significant gear diffrence. No way should a 22RE with 3.42s feel stronger then a 3.4 with 4.10s

As for your 25-30 MPG claim that sounds very extreme for some one running 31s. Consider the fact the Celica guys struggle to get into the high 20s with less wieght, significantly less drag, and smaller tires this seems unrealistic. In addition with your 31s and 3.42 gears your only turning around 2050 RPMs at 65 MPH. This is out side of the 22REs efficiency zone and probably has you mashing the pedal hard to maintain speeds with out bogging down.

This is only my take on it.

 

I'm just going to throw this out there as a reference. I have an 85 4runner solid axle 22re EFI 4wd. I rebuilt the motor in it myself. Runs like a champ. Has an engnbldr oversized head w/ OS valves and his 268 cam. Big throttle body and a newer model intake. Some other random mods... I run 33x12.5x15 BFG AT on 4.10's. It accelerates faster than my original stock motor did on ~29" tires by ALOT and the original motor had 145psi across all cylinders. I am assuming it scooted alot faster because of the modifications despite the giant tires.

My truck pulls very good up hills. I can pull just about any hill in 4th at 65-70mph. Can still pull low grade hills in 5th at 70. But, I also get 22-24mpg on the highway and about 16 around town.

Before building it I was averaging 14 around town and 16-18 on the highway depending on how flat it was. It couldn't pull a steep hill in 4th if it's life depended on it. Any hill was 3rd at very high rpms.

I have used it (rebuilt) to tow a trailer with a 3000lb car on it and it did perfectly fine on a 250 mile road trip. Was able to even pull hills in third. Granted speed limit is 55mph with trailer.

I know my truck is no comparison to a stock 4runner. But I'm just trying to give feedback of what my stock small tire truck was like and what a modded big tire truck are capable of. Keep in mind. it still has 4.10's

 

Numbers on paper can say one thing, but real life case can be much different than the picture shows. Yes the v6 has more power clearly, but the bottom end on mine ~1000-1500 rpm feels week vs the 4cyl. I'd point at the 4 valves per cyl vs 2 in the 4 banger which that design is known for a stronger lower end torque.

As for the mileage, I'm from ecomodder.com, I'm a bit of an extreme driver for mpg. My 97 corolla with a 1.8L 4 speed auto trans gets 40-45mpg when I drive it the same way. Generally that is at 45-50mph on back roads and 55-60mph on the expressway (slow lane of course). My corolla runs around 1600rpm at 45mph, way out of is peak torque of 2800rpm.

Just because an engine puts out the most power at a give rpm, isn't it's most efficient rpm to run at when going down the road. General rule of thumb is highest gearing with out lugging the engine at your target speed. Hills and wind can be a huge factor, however I'm in an area with no major hills, just a couple spots with rolling hills that incline something like 10-15 feet in 1/4 mile.

Another big factor to account for, the 86 2wd pickup is much lighter than the 96 Tacoma 4x4 by probably a good 1000-1500 pounds I'd think. The Tacoma body is something like 6in wider + 4x4 components and v6. The Tacoma came with 31in tires factory with the 4:10 gearing and shortly after I put 32's on it for MPG reasons and the fact the tires are much cheaper when running 16in rims. Tacoma typically gets 18-19mpg tank averages but I haven't driven it like the other's lately, I was getting 22-24 when I was working last which was ~1hr drive each way back roads.

Here is my corolla's online fuel log. I stopped logging once I got the Tacoma ironically. You can see the large dips when I wasn't able to focus on mpg. Same car has 298k miles today, start of the fuel log is 225k.

http://ecomodder.com/forum/em-fuel-l...vehicleid=5932

 

I understand every thing you just said. However Toyota engineers built that truck with highway gears and 28 inch tires for a reason. A normal 22RE normally runs best from 2400-3200 RPMs. At 2000 RPMs your actually under the powerband and under the efficiency range. Lower RPMs don't alwase mean better MPG just ask the 4.7 Chrysler guys.

Now for the gas sipper. My wife owned a corolla for a number of years with a 4 speed auto and 1.8L. It was a very good car and with a light foot it would get low 30s very consistently on highway. This was bone stock with normal driving. If some one had modified one or was being extremely light on the gas I can see maybe 40 being possible. However here is the kicker. Going from a car that should get 33 mpg to 40 mpg (20% over normal)with as you stated extreme caution on the go fast button is not nearly as big of a jump as going from a truck that normally gets 18-20 mpg to 28-30 mpg (50% over normal)

If you are getting those numbers please start a build thread and share your secrets. I know a lot of guys swap to diesel just to get into the high 20s so you definitely have something special going on.

 

I understand and can appreciate the benefits of a more efficient engine/platform but if MPG was really that much of a concern, I wouldn't own the vehicles I do.

I personally don't get the hypermiling thing. If I had to drive like that to achieve the MPG I wanted, it would 1) drive me crazy and 2) make me sell the car for something efficient enough that I could drive it without thinking about my average MPG. ....maybe to do it once just to say I could, but not all of the time.

 

I have a v6 , 95 automatic the plate has on it that its geared G144 , os if I have this right G=8", 14 = 4.875 , 4 = 4 pinion open dif , is that how that reads ? I run Mastercraft 30 x 9.5 x 50R15, so is that a good match ? excab 4x4.

 

I got these codes from my local bone yard if this helps.

 

You could easily run somewhat larger tires on 4.88 gears with a good running 3vz engine.