does wheel size offect fuel consumption

[XJCrawler]

I feel really unlucky with my non-turbo Safari. Fuel consumption is dramatic compared with other Safaris, think it needs a good tune or something done with the injectors, but I'm getting 430kms to a tank. It's got a 2" lift + 33" MTs.

[phraza]

i get 330kms to a tank! that is with 33's. have contemplated getting smaller road tyres to see if it makes a difference but cant be arsed

[00falcon]

How long is a piece of string...

Tell me how many liters in your fuel tank...

i get 330kms to a tank! that is with 33's. have contemplated getting smaller road tyres to see if it makes a difference but cant be arsed

Phraza.
The size of a TJ Fuel tank = 72L
Are those K's, speedo K's or GPS K's...?

(72L / 330K's = 21.8L/100K's)
I suspect there speedo K's...

My speedo reads 82 when im doing 100 by my GPS (im on 33's)

So... (Please correct me if my math is wrong, i suspect it is.
but...)

330k's /.82 = 402 actual K's
72L / 402K's = 17.9L/100K's
(Assuming you run the tank dry)

CLUMZ1.
There i go again... taking it to seriously...

[NJV6]

Just put the 33's on the back and the 31's on the front, thats what I do for fuel economy, the vehicle thinks it is going downhill all the time. If you turn the fan on full bore it also helps as it forces air out the vents in the rear of the cab creating forward momentum, much like a fire hose, only an air one.

[ice4x4]

Just put the 33's on the back and the 31's on the front, thats what I do for fuel economy, the vehicle thinks it is going downhill all the time. If you turn the fan on full bore it also helps as it forces air out the vents in the rear of the cab creating forward momentum, much like a fire hose, only an air one.

You sir, are a GENIUS!

[Dirtydog]

Just put the 33's on the back and the 31's on the front, thats what I do for fuel economy, the vehicle thinks it is going downhill all the time. If you turn the fan on full bore it also helps as it forces air out the vents in the rear of the cab creating forward momentum, much like a fire hose, only an air one.

You sir, are a GENIUS!

dont forget it is more inclined to push the air over the top than straight into the front, so is going to be more aerodynamic! like a drag car!!!

[CLUMZ1]

This is all copied from the "Concise Urban Dictionary" so its for real

Lest we forget the definition provided for "4x4";

1;
A simple maths equation that equals 16.
Elementary maths equation: 4x4=16

I feel really unlucky with my non-turbo Safari. Fuel consumption is dramatic compared with other Safaris, think it needs a good tune or something done with the injectors, but I'm getting 430kms to a tank. It's got a 2" lift + 33" MTs.

CLUMZ1.
There i go again... taking it to seriously...

Just put the 33's on the back and the 31's on the front, thats what I do for fuel economy, the vehicle thinks it is going downhill all the time. If you turn the fan on full bore it also helps as it forces air out the vents in the rear of the cab creating forward momentum, much like a fire hose, only an air one.

[crazyclark31]

I feel really unlucky with my non-turbo Safari. Fuel consumption is dramatic compared with other Safaris, think it needs a good tune or something done with the injectors, but I'm getting 430kms to a tank. It's got a 2" lift + 33" MTs.

Thats pretty much exactly what i get with the same mods. Mines an auto

[crazyclark31]

Just put the 33's on the back and the 31's on the front, thats what I do for fuel economy, the vehicle thinks it is going downhill all the time. If you turn the fan on full bore it also helps as it forces air out the vents in the rear of the cab creating forward momentum, much like a fire hose, only an air one.

Fark me thats brilliant

[sibainmud]

Just put the 33's on the back and the 31's on the front, thats what I do for fuel economy, the vehicle thinks it is going downhill all the time. If you turn the fan on full bore it also helps as it forces air out the vents in the rear of the cab creating forward momentum, much like a fire hose, only an air one.

Hmmmmm, may do this in the next build


Whole thread is gold

Keep it up boys

I find that parking the wipers half way up the windscreen (like race cars) helps on long trips

Cheers,

[phraza]

Phraza.
The size of a TJ Fuel tank = 72L
Are those K's, speedo K's or GPS K's...?

(72L / 330K's = 21.8L/100K's)
I suspect there speedo K's...

My speedo reads 82 when im doing 100 by my GPS (im on 33's)

So... (Please correct me if my math is wrong, i suspect it is.
but...)

330k's /.82 = 402 actual K's
72L / 402K's = 17.9L/100K's
(Assuming you run the tank dry)

Mine sits on 100 and the GPS says 100...

I find that parking the wipers half way up the windscreen (like race cars) helps on long trips

Haha awesome!

[badnuz]

20ltr/100 is std for a TJ

even my gts with narrower front wheels gets better economy...


hmm, not only should we run smaller diamater fronts, but also much narrower (again, like a drag car!)

but wait, dont drag cars use like 10 ltrs per run?

goin on that logic, we are all wrong

[Paulballz]

Just put the 33's on the back and the 31's on the front, thats what I do for fuel economy, the vehicle thinks it is going downhill all the time. If you turn the fan on full bore it also helps as it forces air out the vents in the rear of the cab creating forward momentum, much like a fire hose, only an air one.

After been a member for a few years now in search of a awnser to all my problems I can now rest in peace an say I have found it thanks to you NJV6...this is absolute gold

[fweddy]

Has anyone tried the airwheel mod?



If you drill angled holes in the back of each tread block of tread, the escaping air propels the tire forward. This assists the power coming from drive train and hence increases efficiency incredibly. Another benefit is that it clears the tread of mud better than any other method yet known. Just got to be careful on letting off the throttle while these are working if you have auto lockers fitted as the wheel can overdrive the diff and cause lockup. It isn't too great a problem as this passes the air power through the drive train onto any other locked up wheels giving additional boost where its needed. It can also cause the engine to over run and is not ideal for autos (same problem as when towing them).

I know some one is going to state the obvious that the tyres are going to loose air, but you also have to fit hoses like the logging trucks have to compensate for the minor air loss. When the Pro guys fit these they use air compressors to keep them going but the average guy like you or I could just tee into NJV6s heater concept and take an air feed from that, Although I haven't tried it too see if it would work. (WARNING: If unsure ask a pro about the compressor idea, I don't want myself or NJV6 to be blamed for your tyres exploding from excess inflation using this home handyman method.)

Obviously, the bigger the tyre the more chunks of tread so the more jets of air.
In summary, Yes, the larger wheel size will reduce the fuel consumption (if you still use any in fact) from your fuel tank.

[Gardengnome]

My truck has moved about 10m in the last 3 years and the amount of fuel in the tank has indeed reduced. cough, evaporation.

If I fit smaller wheels will I save fuel?

[XJCrawler]

i get 330kms to a tank! that is with 33's. have contemplated getting smaller road tyres to see if it makes a difference but cant be arsed

Lol, but we all know those 4L 6 banging Jeeps love to drink no matter what they are doing!

[kbjj]

My truck has moved about 10m in the last 3 years and the amount of fuel in the tank has indeed reduced. cough, evaporation.

If I fit smaller wheels will I save fuel?

I imagine you would save fuel with smaller tyres in this here situation as your automobile would be further away from the rays of Ra (the sun) therefore the evaporation rate should be less.
If you were actively using this automobile, the extra gravitational pull, due to the gross mass being closer to the ground, may have a counter productive outcome

[Dirtydog]

My truck has moved about 10m in the last 3 years and the amount of fuel in the tank has indeed reduced. cough, evaporation.

If I fit smaller wheels will I save fuel?

I imagine you would save fuel with smaller tyres in this here situation as your automobile would be further away from the rays of Ra (the sun) therefore the evaporation rate should be less.
If you were actively using this automobile, the extra gravitational pull, due to the gross mass being closer to the ground, may have a counter productive outcome

Is that why go carts are cheaper to run?

[Cambo]

My truck has moved about 10m in the last 3 years and the amount of fuel in the tank has indeed reduced. cough, evaporation.

If I fit smaller wheels will I save fuel?

If you were to remove the wheels altogether and use 2 trolly jacks to move this excessive distance of 10m over 3 years or 3.333m per year & stored the newspaper that wraps your fish and chips in the truck, the heat from the suns rays and the molecular activity will eventually turn the remaining chip grease into bio diesel, which will inturn start to gain you fuel, increasing economy, this will only work if using a trolly jack with really small wheels

[Taz]

My truck has moved about 10m in the last 3 years and the amount of fuel in the tank has indeed reduced. cough, evaporation.

If I fit smaller wheels will I save fuel?

I imagine you would save fuel with smaller tyres in this here situation as your automobile would be further away from the rays of Ra (the sun) therefore the evaporation rate should be less.
If you were actively using this automobile, the extra gravitational pull, due to the gross mass being closer to the ground, may have a counter productive outcome

What are you smoking mate giving out advice like that? There are already perfectly designed and accepted devices to counter Ra's wrath



I'd lend you mine......but......they're mine.

Note that they also keep dust off the windshield. The Swiss Army Knife of sun protection eh.

[fish]

well there i was the FEELING of DARKNESS
I took my PILLS
I went OUTSIDE
Looked at the SKY
the HILLS
The sea or the area of the sea
if you cauld see it
Then a WARM FEELING COME OVER ME
I cauld NOW see the LIGHT
YOU KNOW WHAT THE LIGHT WAS
1991 TERRENO LIGHTS
A REAL 4+4 ITwas like Crist had spoke to me

LIFE IS GIVEN the TEERENO LIGHTS WERE THERE IT WAS REAL
YES i turned them off .............

yea bro totally know what you mean,..........
oh wait. what the actual whuck are you talking about?

keep it coming

[philip121]

Some Sd news The fuel prices are going up
another reason to work out what ever we drive how to use fuel so we get more kms useing it

[phraza]

i don't really pay attention to fuel prices, $120 per tank vs $120.70 per tank isnt too much of a difference

[Bubba]

If you turn the fan on full bore it also helps as it forces air out the vents in the rear of the cab creating forward momentum, much like a fire hose, only an air one.

I have being looking into this... Jeep have produced a new model called the Ramjeep. It is much like a Ramjet and can be fitted to most Jeep (not open tops). This will only work with Jeeps, the reasoning for this will be explained. Simply put it uses the open Brayton cycle with the rear of the cabin being used as a divergent subsonic diffuser.

To operate, simply turn on your fan to full and open the back window. Do not turn on your Air Conditioning as you need as much "Free Stream" going into the "inlet" as possible (see diagram 0 - 1)

The naturally occurring combustible gases that emanate from Jeep owners react with the diffused air (diagram 2-3). The open back window acts as a "Nozzle" and is expelled (diagram 4)



The exact fuel saving will depend your speed, the faster you go the higher the efficiency. If you want more fuel efficiency at a lower speed you would need to think about a Scramjeep, but that would be silly.

Due to scientific formula used (MupT) Jeep owners are now confirmed as being "MUPiTs"

Check out the science if you don't believe me

[Dirtydog]

If you turn the fan on full bore it also helps as it forces air out the vents in the rear of the cab creating forward momentum, much like a fire hose, only an air one.

Due to scientific formula used (MupT) Jeep owners are now confirmed as being "MUPiTs"

Check out the science if you don't believe me

That is just bloody gold lol, nice one mate

[badnuz]

or:

THIS

[niblik]

or:

THIS

*fwap fwap fwap* yearghhhhhhh. Now ya gettin serious Badnuz. That there's some high quality porn.....

[philip121]

Yes i built a RAM JET engine that is correct for RAM JETS
ok so you dont care about fuel prices if it goes way up you one day might
BUT the price for diesel trucks will also rise
new or old even stuffed

[mike barnett]

get real and stop the yabba yabba wheel size only afffffects the size off ya willy. fuel consumption affects the size of ya wallet so get a freckin V8.

[Dirtydog]

price o biodiesel aint gone up en 20 yaers, dam city folk an em fancy petroliom powereed caars....