Gearing and gas mileage on a built 4runner
09-15-2012, 12:29 PM
#1
Registered User
Thread Starter
Join Date: Jan 2012
Posts: 151
Likes: 0
Received 0 Likes
on
0 Posts
Gearing and gas mileage on a built 4runner
Trying to increase my mpg a little. I get 12 to 13 around town , 16.5 mpg flat freeway. I Was thinking about re gearing. I have a 92 4runner with a gm 4.3 , l460e auto , 35"tires , 4:88 gears. Motor runs great and Everything has been rebuilt. Yes i know these wheelers are never going to get great mpg . This is just a gearing question . Was thinking if i swapped to 4:56 or 4:10 gears that would help on the freeway but then i would get worse mpg around town even though it's an auto right ? What do you think ?
Thanks Here some pictures of my ride.
Thanks Here some pictures of my ride.
Last edited by james92toy; 09-15-2012 at 12:44 PM.
09-15-2012, 01:25 PM
#2
Registered User
Join Date: Jan 2011
Location: 46 50' 36.82'' N 122 19' 41.01'' W
Posts: 1,746
Likes: 0
Received 6 Likes
on
5 Posts
I would treat it like a gmc jimmy at this point. Cause thats pretty much what it is, a very awsome chevy blazer.
Id check out some Chevy forums and see what gearing is best with those tires for a 4.3 with auto. Kinda not really a toyota question at this point.
Just like with yotas, gm's have gear ratio to tire size recommendations as well.
Good luck
Id check out some Chevy forums and see what gearing is best with those tires for a 4.3 with auto. Kinda not really a toyota question at this point.
Just like with yotas, gm's have gear ratio to tire size recommendations as well.
Good luck
09-15-2012, 04:10 PM
#3
Registered User
Join Date: Oct 2007
Location: Roy, WA
Posts: 606
Likes: 0
Received 0 Likes
on
0 Posts
Converter lockup working correctly? I really wouldn't expect any better than that though, the 4.3 has never been known for fuel economy even in its stock application.
09-15-2012, 07:01 PM
#4
Registered User
Join Date: Jan 2011
Location: 46 50' 36.82'' N 122 19' 41.01'' W
Posts: 1,746
Likes: 0
Received 6 Likes
on
5 Posts
Your MPG does sound about what those motors got.
But its worth a try searching or even posting on a chevy forum.
But from the looks of the wheeling id say keep her low
But its worth a try searching or even posting on a chevy forum.
But from the looks of the wheeling id say keep her low
Trending Topics
09-18-2012, 04:47 PM
#11
Here is the research that I have done and the numbers that I came up with.
I have the 4.3 in my truck with a TH350/5.29s and 36" IROKS.
I am trying to get the gearing figured out for when I combine my two trucks into one and run it more on the street...
The S-10/Jimmy/Bravada came with this setup:
Engine: 4.3
Trans: 4l60e
Final Drive: 3.42
Tire Size: 235/70/r15 Approx: 28"
Trans gear ratios: 1st 3.06
2nd 1.63
3rd 1.00
O/D 0.70
Reverse 2.29
Do the math and figure out what gear you should be running with your tire size....
I have the 4.3 in my truck with a TH350/5.29s and 36" IROKS.
I am trying to get the gearing figured out for when I combine my two trucks into one and run it more on the street...
The S-10/Jimmy/Bravada came with this setup:
Engine: 4.3
Trans: 4l60e
Final Drive: 3.42
Tire Size: 235/70/r15 Approx: 28"
Trans gear ratios: 1st 3.06
2nd 1.63
3rd 1.00
O/D 0.70
Reverse 2.29
Do the math and figure out what gear you should be running with your tire size....
09-18-2012, 04:55 PM
#12
Registered User
Join Date: Jan 2011
Location: 46 50' 36.82'' N 122 19' 41.01'' W
Posts: 1,746
Likes: 0
Received 6 Likes
on
5 Posts
F a bunch of math. Its to hard with a drink in your hand and I wont do it.
Just go here and punch it all in.
http://www.grimmjeeper.com/gears.html
Ignore the jeep stuff, Im watching you.
Just go here and punch it all in.
http://www.grimmjeeper.com/gears.html
Ignore the jeep stuff, Im watching you.
09-18-2012, 05:49 PM
#13
Registered User
Join Date: Jul 2009
Location: Rocky Mtn. House AB, Canada
Posts: 727
Likes: 0
Received 1 Like
on
1 Post
who says you can't have fuel economy? my record is 30mpg, I can consistently get 23-25mpg. For reference, my truck weighs 4100lbs on the street.
if your thinking of going to a 4.10 or something like that. look at it from this perspective, your rpms will be lower with that gear, so you'll be farther out of the power band, so you'll need your foot farther on the throttle, which will dump in more fuel. So sure the engine is spinning less, but you require more fuel for it to keep spinning. So depending how the math works out, you may get worse fuel economy that way. Where as if you went with a 5.29 gear, its the exact opposite.
Time for a story...
According to my apexi SAFC, cruising down the highway I'm using around 13-14% throttle with my 35s, when I put on my big boy tires (measure out at 37" with a tape measure) the engine has lower rpms, but I need to have 17-18% throttle to keep highway speed. Given the tires are a bit heavier, but not that much. With my 600lbs snowmobile in the back I don't need 17% to keep speed. Just something to keep in mind. Less rpms doesn't mean less fuel. Infact its the complete opposite.
if your thinking of going to a 4.10 or something like that. look at it from this perspective, your rpms will be lower with that gear, so you'll be farther out of the power band, so you'll need your foot farther on the throttle, which will dump in more fuel. So sure the engine is spinning less, but you require more fuel for it to keep spinning. So depending how the math works out, you may get worse fuel economy that way. Where as if you went with a 5.29 gear, its the exact opposite.
Time for a story...
According to my apexi SAFC, cruising down the highway I'm using around 13-14% throttle with my 35s, when I put on my big boy tires (measure out at 37" with a tape measure) the engine has lower rpms, but I need to have 17-18% throttle to keep highway speed. Given the tires are a bit heavier, but not that much. With my 600lbs snowmobile in the back I don't need 17% to keep speed. Just something to keep in mind. Less rpms doesn't mean less fuel. Infact its the complete opposite.
09-18-2012, 05:59 PM
#14
Registered User
Join Date: Jan 2011
Location: 46 50' 36.82'' N 122 19' 41.01'' W
Posts: 1,746
Likes: 0
Received 6 Likes
on
5 Posts
who says you can't have fuel economy? my record is 30mpg, I can consistently get 23-25mpg. For reference, my truck weighs 4100lbs on the street.
if your thinking of going to a 4.10 or something like that. look at it from this perspective, your rpms will be lower with that gear, so you'll be farther out of the power band, so you'll need your foot farther on the throttle, which will dump in more fuel. So sure the engine is spinning less, but you require more fuel for it to keep spinning. So depending how the math works out, you may get worse fuel economy that way. Where as if you went with a 5.29 gear, its the exact opposite.
Time for a story...
According to my apexi SAFC, cruising down the highway I'm using around 13-14% throttle with my 35s, when I put on my big boy tires (measure out at 37" with a tape measure) the engine has lower rpms, but I need to have 17-18% throttle to keep highway speed. Given the tires are a bit heavier, but not that much. With my 600lbs snowmobile in the back I don't need 17% to keep speed. Just something to keep in mind. Less rpms doesn't mean less fuel. Infact its the complete opposite.
__________________
It's not turbo lag...its foreplay
if your thinking of going to a 4.10 or something like that. look at it from this perspective, your rpms will be lower with that gear, so you'll be farther out of the power band, so you'll need your foot farther on the throttle, which will dump in more fuel. So sure the engine is spinning less, but you require more fuel for it to keep spinning. So depending how the math works out, you may get worse fuel economy that way. Where as if you went with a 5.29 gear, its the exact opposite.
Time for a story...
According to my apexi SAFC, cruising down the highway I'm using around 13-14% throttle with my 35s, when I put on my big boy tires (measure out at 37" with a tape measure) the engine has lower rpms, but I need to have 17-18% throttle to keep highway speed. Given the tires are a bit heavier, but not that much. With my 600lbs snowmobile in the back I don't need 17% to keep speed. Just something to keep in mind. Less rpms doesn't mean less fuel. Infact its the complete opposite.
__________________
It's not turbo lag...its foreplay
Just stop it. Before ford dodge nissan toyota and honda all try to sue you. We, and they dont make any 4 thousand pound lifted sa'd 4wd trucks that get 30mpg. Unless its powered by a briggs & straton 5horse.
Especially in (old) moters used from 86-92.
My girlfriends 2009 Audi 2.0T gets 29mpg if you try, and its a tiny little egg, that wieghs half as much.
Last edited by ThatGuy1295; 09-18-2012 at 06:01 PM.
09-18-2012, 06:18 PM
#15
Registered User
Join Date: Jan 2011
Location: 46 50' 36.82'' N 122 19' 41.01'' W
Posts: 1,746
Likes: 0
Received 6 Likes
on
5 Posts
Less rpms doesn't mean less fuel. Infact its the complete opposite.
Its a fine balance of rpms and throttle use. Plus the 4.3's powerband might just be a little lower rpms than our yota motors.
No throttle @ low rpms = great mpg
Full throttle @ 4,000rpms = no mpg
Higher rpms just means the engine is capable of using more fuel, doesnt mean it is.
And lower rpms means it cant use lots of fuel, but doesnt mean your not still dumping it in there with to much throttle for the given rpms.
So in the middle with just the right throttle and just the right rpms is where its at.
However its a very complicated thing to find that exact ratio, and its different for different vehicles. Thats why there called different.
Last edited by ThatGuy1295; 09-18-2012 at 06:33 PM.
09-18-2012, 07:03 PM
#16
Registered User
Thread Starter
Join Date: Jan 2012
Posts: 151
Likes: 0
Received 0 Likes
on
0 Posts
Lots of good info thanks guys.
Some people suggested i run 4:10 gears.
I have a pair of lc axle's with 4:56 i might try.
My truck feels right with the 4:88 gears. At 65 mph im turning 2500 rpms and my speedo is right on money.
Thing's i will try.
Make a new air intake with a k&n filter , I had to use that one to pass smog because it's stock .
Some aluminum wheels for driving around town with some 33" tires.
Taking the canoe off the top when taking the kid's to school.
09-19-2012, 04:18 PM
#17
Registered User
Join Date: Jul 2009
Location: Rocky Mtn. House AB, Canada
Posts: 727
Likes: 0
Received 1 Like
on
1 Post
I have one! Its called having your cake and eating it too! Like I said, it was my record. Wind was probally with me. I can consistantly get mid 20's. If you read my sig you'll see I have a 7mgte. Around 300hp/tq at the crank. Along with the 5.29s, smooth rolling MT mtzs, proper tire pressure, don't go into boost and a light foot its easy for me to accomplish those mid 20 numbers. Or I can drive like an idiot, make it pump 12psi of boost every time the light turns green, make a set of tires disappear to smoke in a day and get 2mpg. I'm willing to bet those numbers go up too once I get a front mount intercooler and a bunch of heat wrap for the rest of the intake tubing.
There is a huge difference between a 25 year old 4x4 thats been beat up, put away wet, pieced together and kept alive with junkyard parts with 300xxxkm on the underpowered 4cyl engine, and a 25 year old, solidly built, well cared for, always maintained, freshly rebuilt turbo inline 6 4x4.
Sorry for stealing the thread but I had to defend myself! I'm not going to be called a liar!
SO back to the thread. I would reccommed a quality dry filter instead of the k&n as they have to be oiled in order to filter properly. And depending on which type of air flow meter/mass air flow sensor you have, the oil may clog it and then you have to buy a new one. Been there done that. Remember, I'm not running the same engine you are so you might be ok. Just something to think about.
There is a huge difference between a 25 year old 4x4 thats been beat up, put away wet, pieced together and kept alive with junkyard parts with 300xxxkm on the underpowered 4cyl engine, and a 25 year old, solidly built, well cared for, always maintained, freshly rebuilt turbo inline 6 4x4.
Sorry for stealing the thread but I had to defend myself! I'm not going to be called a liar!
SO back to the thread. I would reccommed a quality dry filter instead of the k&n as they have to be oiled in order to filter properly. And depending on which type of air flow meter/mass air flow sensor you have, the oil may clog it and then you have to buy a new one. Been there done that. Remember, I'm not running the same engine you are so you might be ok. Just something to think about.
Last edited by nothingbetter; 09-19-2012 at 04:21 PM.
09-19-2012, 04:33 PM
#18
Registered User
Join Date: Jan 2011
Location: 46 50' 36.82'' N 122 19' 41.01'' W
Posts: 1,746
Likes: 0
Received 6 Likes
on
5 Posts
Ohh u have a 7mgte. Dont relize that when i stated it was only used from 86-92, oh wait i did. Why would your moter get 10mpg better then any moter in any toyota ever got? So it makes way more hp and gets 10mpg better?
Why did they stop using it in 92. So in todays big push for mpg and power that auto manufacturers or under they must have overlooked that all their problems could be solved by the amazing 7mgte. Doubt it buddy
Tell us why you get such unreal results. Otherwise your just misleading everybody.
Why did they stop using it in 92. So in todays big push for mpg and power that auto manufacturers or under they must have overlooked that all their problems could be solved by the amazing 7mgte. Doubt it buddy
Tell us why you get such unreal results. Otherwise your just misleading everybody.
09-19-2012, 04:54 PM
#19
Registered User
Join Date: Jan 2011
Location: 46 50' 36.82'' N 122 19' 41.01'' W
Posts: 1,746
Likes: 0
Received 6 Likes
on
5 Posts
I mean Jesus. These moters only got 22mpg in a car.
So let me get this straight, by simple putting that moter in a heavy truck it magically gets 30mpgs. ( I know it was your record) But your claiming consistantly better milage then the car could get. WHY? I would have to be a retard to just believe you. Your not gonna outsmart 30 japps with unlimited funding and resources by taking an OLD motor and sticking it in a vehicle thats heavier then it was designed for.
See for yourself
http://www.fueleconomy.gov/feg/Power...ra&srchtyp=ymm
james92toy I am not thread jacking, to many people are claiming rediculous results. What you get is actually not that bad in comparison to everything else on the road thats big and heavy.
So let me get this straight, by simple putting that moter in a heavy truck it magically gets 30mpgs. ( I know it was your record) But your claiming consistantly better milage then the car could get. WHY? I would have to be a retard to just believe you. Your not gonna outsmart 30 japps with unlimited funding and resources by taking an OLD motor and sticking it in a vehicle thats heavier then it was designed for.
See for yourself
http://www.fueleconomy.gov/feg/Power...ra&srchtyp=ymm
james92toy I am not thread jacking, to many people are claiming rediculous results. What you get is actually not that bad in comparison to everything else on the road thats big and heavy.
09-19-2012, 05:01 PM
#20
Registered User
Join Date: Jul 2009
Location: Rocky Mtn. House AB, Canada
Posts: 727
Likes: 0
Received 1 Like
on
1 Post
I'm not going to have an argument with you. I'll have a discussion, but refuse to argue over the internet. I won't drop to that level.
I'm not trying to mislead anyone. I have no reason to lie to anyone on this site. Its not going to gain me anything. My intenet penis isn't going to change size if I say I get 50mpg or 5 mpg.
Just because you have power doesn't mean you need to use it. As I posted, crusing at 100kmph (60ish mph) I'm on the throttle 13% ish according to the SAFC. I'm just guessing, but with the 4cyls I've driven my guess would be around 40% of the throttle is being used. That is a BIG difference. I have the power and torque at my cruising rpm (2650 at 100kmph) to be just a wee bit on the throttle (so only a little bit of fuel is injected), where as the 22 series doesn't have that same ability due to its design (short stroke/wide bore) If you want to continue please PM me. I have nothing to hide.
I'm not trying to mislead anyone. I have no reason to lie to anyone on this site. Its not going to gain me anything. My intenet penis isn't going to change size if I say I get 50mpg or 5 mpg.
Just because you have power doesn't mean you need to use it. As I posted, crusing at 100kmph (60ish mph) I'm on the throttle 13% ish according to the SAFC. I'm just guessing, but with the 4cyls I've driven my guess would be around 40% of the throttle is being used. That is a BIG difference. I have the power and torque at my cruising rpm (2650 at 100kmph) to be just a wee bit on the throttle (so only a little bit of fuel is injected), where as the 22 series doesn't have that same ability due to its design (short stroke/wide bore) If you want to continue please PM me. I have nothing to hide.
