tuning for highway gas milage?

[bcdave]

ok so unfortunately; diesel 3L 4 runners are not sold in N America :doh:; thats what I was hoping to get. Tested some diesel Cherokee loretos; tested the ram eco diesel; both heavier trucks but did ok with 3L Diesels; much better gas mileage and still had decent torque.

The currant ride; 4Funner came with a master flow exhaust; supposed to give me better mileage; is there additional electronic tuning or turbo charging that would better a diesel mileage and torque?

Is there a way to just get rotating firing on cylinders and injectors to 1/2 the gas on highway driving?

how can this get done? Other tuning for gas saving? appreciated.

Cheers BCDave

 

[LandCruiser]

No offense, but this is literally one of the worst vehicles for gas mileage and the cylinder deactivation you're describing is not possible.

Best advice is to get low rolling resistance tires and drive slow.

 

[Mass 4runner]

I feel you lost some credibility after typing "loretos" and " 4Funner".

 

[mynameistory]

Even if you COULD spend your way to better gas mileage, there's no way you'd recoup the cost of the modifications over the lifetime of the truck.

If you presume that an exhaust and intake or some kind of mystery tune would net you any efficiency gains (they won't), the combined cost would exceed your gasoline savings for hundreds of thousands of miles...

 

[bcdave]

I feel you lost some credibility after typing "loretos" and " 4Funner".

:wow:

DOG !... who are you to judge, an anal English Teacher? Spell-ins over rated; were here on the WW internet; its late; im typing on my back, with a laptop propped up on my lap; 4 fun-er is on purpose; and well how does a dyslectic spell Loreto any-who?

lol

 

[bcdave]

Even if you COULD spend your way to better gas mileage, there's no way you'd recoup the cost of the modifications over the lifetime of the truck.

If you presume that an exhaust and intake or some kind of mystery tune would net you any efficiency gains (they won't), the combined cost would exceed your gasoline savings for hundreds of thousands of miles...

yes; well said; Ive also looked into doing a diesel engine swap; but very spendy proposition; I've seen some used diesel engines with transmissions but the cost would be at best $4500 to get it to the door then another? 1-2K optimistically to get installed ...

 

[mynameistory]

yes; well said; Ive also looked into doing a diesel engine swap; but very spendy proposition; I've seen some used diesel engines with transmissions but the cost would be at best $4500 to get it to the door then another? 1-2K optimistically to get installed ...

My friend, what you're asking for is stepping over a dollar to pick up a nickel.

 

[LandCruiser]

yes; well said; Ive also looked into doing a diesel engine swap; but very spendy proposition; I've seen some used diesel engines with transmissions but the cost would be at best $4500 to get it to the door then another? 1-2K optimistically to get installed ...

You could plug and play a Prado diesel engine in there. LOL at the cost you're getting quoted. If it can be done for less than 15k I'll dance an Irish Jig.

BTW, where would you get one in North America?

Also, good luck getting that abomination to pass vehicle inspection in what I assume is Canadia.

 

[mrblah]

speed holes....

drill holes every few inches......

 

[mynameistory]

 

[thennen]

ok so unfortunately; diesel 3L 4 runners are not sold in N America :doh:; thats what I was hoping to get. Tested some diesel Cherokee loretos; tested the ram eco diesel; both heavier trucks but did ok with 3L Diesels; much better gas mileage and still had decent torque.

The currant ride; 4Funner came with a master flow exhaust; supposed to give me better mileage; is there additional electronic tuning or turbo charging that would better a diesel mileage and torque?

Is there a way to just get rotating firing on cylinders and injectors to 1/2 the gas on highway driving?

how can this get done? Other tuning for gas saving? appreciated.

Cheers BCDave

What number are you getting now, and what are you after? I own a stock 2019 TRDOR on stock tires. I normally accelerate slowly, but I drive at normal speeds. I'm right at 21 mpg average. When I change to 'normal' acceleration, it'll drop off 1 mpg. So in my case, how I drive seems to have the greatest impact.

 

[IanB]

You're in Canada, you can just import an early 4th gen with 1KD turbo diesel if that's what you're after.

 

[Salt T]

You could plug and play a Prado diesel engine in there. LOL at the cost you're getting quoted. If it can be done for less than 15k I'll dance an Irish Jig.

BTW, where would you get one in North America?

Also, good luck getting that abomination to pass vehicle inspection in what I assume is Canadia.

You are correct about cost - now way could it be that cheap. Take a look at Diesel Toys out of Texas. They do conversions using low-mileage powertrains. I once thought about it for my '06 SR5 a few years ago but it didn't make sense. I was hoping before i bought my '17 TRD ORP that Toyota would bring a diesel to the US. Oh well...

 

[bcdave]

You're in Canada, you can just import an early 4th gen with 1KD turbo diesel if that's what you're after.

I see your doing it; good on ya; just wanted something newer ...and

I looked into it; seems like a good idea; but ... not keen on right hand steering / drive in a left drive society; plus import cost / fees; plus your getting an older vehicle; but you can get diesel! I'm disappointed the emissions aren't more understanding; flexible; diesel uses LESS fossil fuel.

Why doesn't Toyota offer diesel as an option? Too bad VW lied about there diesel numbers ... ruined a good thing for everyone; emissions were getting there it can be done.

 

[flatspin]

Your biggest enemy for highway MPG is wind resistance. Short of drastic changes to make the engine for efficient, improving wind resistance is your best bet. Weight can also be in impact if you're driving someplace hilly. You can never seem to recoup on the downhill.

As for City MPG, your biggest enemy switches to weight for what it's worth. Rotational weight of the tires can be a factor with there being a 1mpg difference or more between a heavy wide tire and a lighter skinny tire.

 

[bcdave]

You could plug and play a Prado diesel engine in there. LOL at the cost you're getting quoted. If it can be done for less than 15k I'll dance an Irish Jig.

BTW, where would you get one in North America?

Also, good luck getting that abomination to pass vehicle inspection in what I assume is Canadia.

Not an abomination; diesels a good idea; along with electric powered vehicles; look at the highlander hybrid; this should be an option for 4 runners too; I've seen used engines Toyota diesel engines for sale and there doing it; Mercedes diesels fit too; its just the matter of how much will it cost.

Why doesn't Toyota offer diesel as an option? Too bad VW lied about there diesel numbers ... ruined a good thing for everyone; emissions were getting there it can be done.

Toyota has great diesels; more efficient than gas; lots of torque; that's what got me looking at Toyota's in the first place. Diesel land cursers; pardos; the newer D4D engines; there just not offering them right now in merica; WHY not? Diesel today is a much cleaner fuel today then it used to be. So what's the holdup? I would gladly swap my perfect condition 4L for a 3L D4D engine.

 

[bcdave]

Your biggest enemy for highway MPG is wind resistance. Short of drastic changes to make the engine for efficient, improving wind resistance is your best bet. Weight can also be in impact if you're driving someplace hilly. You can never seem to recoup on the downhill.

As for City MPG, your biggest enemy switches to weight for what it's worth. Rotational weight of the tires can be a factor with there being a 1mpg difference or more between a heavy wide tire and a lighter skinny tire.

Interesting!; ya, the 4 runners a nice wide, sail, of a truck, look at the angle of the 5th gen windshield; more vertical than older 4R's; why? Lots of wind resistance less gas mileage. Ford started making aluminum f150s! much to my amazement. Land Rover had it right all along ... diesel, aluminum 4x4! too bad there so expensive; and don't make them America.

What number are you getting now, and what are you after? I own a stock 2019 TRDOR on stock tires. I normally accelerate slowly, but I drive at normal speeds. I'm right at 21 mpg average. When I change to 'normal' acceleration, it'll drop off 1 mpg. So in my case, how I drive seems to have the greatest impact.

Getting decent numbers for a 4 runner 13 L / 100 kms if I go slow and steady (that's how its calculated in metric; Ill leave the math to someone else; guess-timate thats 21 mpg)

 

[thennen]

Interesting!; ya, the 4 runners a nice wide, sail, of a truck, look at the angle of the 5th gen windshield; more vertical than older 4R's; why? Lots of wind resistance less gas mileage. Ford started making aluminum f150s! much to my amazement. Land Rover had it right all along ... diesel, aluminum 4x4! too bad there so expensive; and don't make them America.



Getting decent numbers for a 4 runner 13kms / 100 kms if I go slow and steady (that's how its calculated in metric; Ill leave the math to someone else; guess-timate thats 21 mpg)

Does that mean 13 liters (litres) per 100 km? If so, that would be around 18.2mpg I think.

 

[bcdave]

Does that mean 13 liters (litres) per 100 km? If so, that would be around 18.2mpg I think.

yes, right, thanks - 13L / 100 kms ; I corrected that in last post ...

 

[Spec-7]

Your biggest enemy for highway MPG is wind resistance. Short of drastic changes to make the engine for efficient, improving wind resistance is your best bet. Weight can also be in impact if you're driving someplace hilly. You can never seem to recoup on the downhill.

As for City MPG, your biggest enemy switches to weight for what it's worth. Rotational weight of the tires can be a factor with there being a 1mpg difference or more between a heavy wide tire and a lighter skinny tire.

The type of road surface being driven on is also a factor in fuel mileage. I just drove over 800 miles from TN to KS and paid particularly close attention to my MPG over the various road surfaces along the way. On the smoother paving used in TN, I averaged 21.5 MPG on OEM tires.
The roads in KY and IL are a far more rough surface. Within 30 minutes of being in KY, the readout on the dash had dropped to 18 mpg. Shortly after that reading, the winds starting kicking up from the storm that I was driving through and by the time I stopped in Paducah, KY to get gas it was at 15.1 mpg. The rest of the way through KY and IL my mpg readout was advising around 16 mpg.
Crossed the Mississippi river into Missouri and the roads got smoother. By the time I was 30 miles west of St Louis, my mpg was back up to 21.1. And yes, before anyone discredits the MPG readout on the dash, I was also doing the math myself and my results were always within half a mile of the dash readout.