Re-gear.
Your gas mileage will recover as will your power.
Then if you have more $$ go on and do the CAI and Exhaust.
Your gas mileage will recover as will your power.
Then if you have more $$ go on and do the CAI and Exhaust.
Better MPG ????? after 6 in lift
Hey all,
New member here at TN although have been a lurker for some time. I have an 08 double cab 4.0 (pre-runner) with 3K miles on it. I purchased this w/ the intentions for a show vehicle for car audio comps. So far, has 6 in lift, 305x17 shoes on pro comp 17x9 Knight Chrome rims. Still working on the final audio equipment. ( 4 tens, 6.5 comps, 6.5 co-axs, 6.5 mid bass )
Question is, what will be my best purchase bewteen new gears, intake syatem, or cat back exhaust. (i know all would be great but not all at once) I have been told that 4.30 gears would be my best bet but have such a hard time finding them other than from Toyota ??
Again, the abover is for better MPG not necessarily for additional power.
Thanks again
New member here at TN although have been a lurker for some time. I have an 08 double cab 4.0 (pre-runner) with 3K miles on it. I purchased this w/ the intentions for a show vehicle for car audio comps. So far, has 6 in lift, 305x17 shoes on pro comp 17x9 Knight Chrome rims. Still working on the final audio equipment. ( 4 tens, 6.5 comps, 6.5 co-axs, 6.5 mid bass )
Question is, what will be my best purchase bewteen new gears, intake syatem, or cat back exhaust. (i know all would be great but not all at once) I have been told that 4.30 gears would be my best bet but have such a hard time finding them other than from Toyota ??
Again, the abover is for better MPG not necessarily for additional power.
Thanks again
1 - 20 of 21 Posts
You'll need gears between 4.50 and 4.80 i'm in class with slow internet but i think it's 4.56 and 4.88 but it's around there since you have 35in tires. Your probably getting 150 miles a tank.
well, if your doing it simply for better mpg, add up how many gallons it would take to equal the price of a new set of gears. for arguments sake, lets say you spend only $500 on gears and install, and say gas is $3.30 a gallon. also, lets say before the gears your getting 17 mpg, and then you get an optimistic 20 mpg after the gears.
so, it would take you 900 gallons and 18000 miles at 20mpg to even break even on the deal!! these are the things people dont realize. to spend a ton of money to simply get a little better mpg is ridicules IMHO.
but then again, do what you want. i vote just leaving as is as its a show truck and probably wont get that many miles on it, but if you really want to spend money, do the gears.
so, it would take you 900 gallons and 18000 miles at 20mpg to even break even on the deal!! these are the things people dont realize. to spend a ton of money to simply get a little better mpg is ridicules IMHO.
but then again, do what you want. i vote just leaving as is as its a show truck and probably wont get that many miles on it, but if you really want to spend money, do the gears.
Welcome to TN!
I would recommend gears.
Here's a good chart:
http://www.sierrabronco.com/TireGearRatio.htm
I would recommend gears.
Here's a good chart:
http://www.sierrabronco.com/TireGearRatio.htm
its not always gas mileage as ones goal when seeking a regear. Loss of power and accleration is the most common reason. going from a say stock 265 to a 315(or 35") tire is a larger jump. Its more noticible on automatics, as the trannys wants to shift more to stay in the power band, and sometimes hunts for overdrive.well, if your doing it simply for better mpg, add up how many gallons it would take to equal the price of a new set of gears. for arguments sake, lets say you spend only $500 on gears and install, and say gas is $3.30 a gallon. also, lets say before the gears your getting 17 mpg, and then you get an optimistic 20 mpg after the gears.
so, it would take you 900 gallons and 18000 miles at 20mpg to even break even on the deal!! these are the things people dont realize. to spend a ton of money to simply get a little better mpg is ridicules IMHO.
but then again, do what you want. i vote just leaving as is as its a show truck and probably wont get that many miles on it, but if you really want to spend money, do the gears.
saving 3 mpg on an average of 19.5gallon tank fill. = 58.5 extra miles to the gallon if your avg. 20mpg. 58.5/20 = 2.925 gallons a tank x cost of gas cali price $3.50 = $10.2375 per tank. $800 gear plus labor cost/ $10.2375 = 78.144 or rounded up 79 tanks of gas. I average 310miles per tank. 4 days of commuting to school with a round trip of 63miles per day. it cost me 22.15 cents a mile. compared to 17.5 cents. and cents add up over time.
Do you have an auto or manual?
I'm not in-tune with the tacomas per say - but I know with the jeep manual transmissions with that sized tire, they lose 5th gear (overdrive) completely because it bogs down so much.
Re-gearing will atleast get you closer to 'stock' power band.
I'm not in-tune with the tacomas per say - but I know with the jeep manual transmissions with that sized tire, they lose 5th gear (overdrive) completely because it bogs down so much.
Re-gearing will atleast get you closer to 'stock' power band.
Yes, it is an automatic. At speeds between 55-70 it really feels like it is trying (hesitating) to shift into gear. At the time, i just filled up the tank and the odometer showed 68 mile driven and it was already at the 3/4 mark. That really sucks!!!! I dont mind spending the $700 to re-gear this thing but wanted somebodys professional opinion as to which gear to get (4.11's or 4.27's) and if this will actually re-gain the lost MPG's.
Thanks again
Thanks again
You actually need to calculate the difference in tire size to come up with the correct MPG.Yes, it is an automatic. At speeds between 55-70 it really feels like it is trying (hesitating) to shift into gear. At the time, i just filled up the tank and the odometer showed 68 mile driven and it was already at the 3/4 mark. That really sucks!!!! I dont mind spending the $700 to re-gear this thing but wanted somebodys professional opinion as to which gear to get (4.11's or 4.27's) and if this will actually re-gain the lost MPG's.
Thanks again
Simply changing the gearing may actually give you false MPG, because now the trans & speedometer gear will be off. (The rear end and the transmission will not match)
This may actually make it seem like you are getting better milage when, in actuality your milage has not changed.
Gearing for MPG is tricky.
There is a lot of different factors.
Let's say at 60 mph your truck RPM is at 2500 and it is always in 4th gear? (3.73 gears)
Now after you change the gears your truck at 60 MPH still stays at 2500 RPM but now you are in 5th gear. (4.88 gears)
You really have not gain in MPG. But you have gained better towing power. (torque)
But I'm not saying this will be the case. I don't really know? (Too many calculations)
Oh? And if you live in an area that you are constantly going up or down hill? Then yes gearing will help!
But if you basically drive freeway flat most of the time? Then it might not be worth it? Gears will bring the low end power back to your truck.
But it gives you food for thought?
Good Luck!
You are only going to re-gain some fraction of the lost MPG's, probably not very much. You are spinning heavier wheels / tires which takes more energy and that's translated into a loss in MPG's.
Yep and you're also much higher now so wind resistance is much greaterYou are only going to re-gain some fraction of the lost MPG's, probably not very much. You are spinning heavier wheels / tires which takes more energy and that's translated into a loss in MPG's.
Just being higher resulting in much higher wind resistance is open to debate, I guess. Yes, you are higher, but the shape of the truck did not really change (except some minor drivetrain things). You now have 6 inches more room underneath. You just shifted the hole thing 6 inches up, but did not change the area of wind resistance much (again, except some minor suspension components maybe).Yep and you're also much higher now so wind resistance is much greater
And hey, the air higher up is thinner, resulting in less drag! :clap: An airplane flying at 10,000ft will have a higher wind resistance than the same airplane at 20,000ft. :boink:
All I am saying is that I think that the majority of the loss in MPG's comes from heavier / bigger wheels and tires rather than from the lift. The lift contributes very little I would guess. I have not tested this, but people with lifts and OEM wheels / tires please chime in.
I have to agree with this idea. I lifted my truck a few inches and mpg, did not really change. Now I have 265/75/16 all terrains, and my mpg went down. So my belief is the bigger heavier tires cause the mpg drop. I am still on stock wheels, so it was the reason in my case.Just being higher resulting in much higher wind resistance is open to debate
what gas milage do you 6in lifters get with 35's?
just curious about 6in and 35 gas milage
just curious about 6in and 35 gas milage
Depends on how i drive i can drive like an asshole or i can drive leisurely it depends i just put my lift and 35'' on with stock gears those will be changed 4.88 i think and my DT long tubes that i ordered will effect my MPG but idk to what extent.
i get avg. 14 MPG
Id say over all its worth it. i have the 6 inch now and in a month or two it will be 9'' with my spacer lift too. im gonna stick with the 35's tho see how that turns out.
i get avg. 14 MPG
Id say over all its worth it. i have the 6 inch now and in a month or two it will be 9'' with my spacer lift too. im gonna stick with the 35's tho see how that turns out.
toku will be here shortly to yell at you. you best delete this thread before he gets here. 
regular members cant delete their own threads btw, and there will be no yelling.toku will be here shortly to yell at you. you best delete this thread before he gets here.
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