Question on tyres

[Chug]

hey guys.
Ive just had my gq lifted 2inch , ironman all round.
At present it has 15in rims with i think 31x10.5x15 tyres

AFter the lift my fuel consumption went from 11.5 litres/100 to around 13.5
The original shock due to age, caused the tyres to wear wrong, making the steering wobble ( mostly between 85-100kmph)
Im wondering if when i replace the tyres what way should i go?
should i get new 15x8 rims and go 33's, or will that raise diesel consumption even more
should i source a set of 16in standard gq rims and run 16in tyres
should i stick with same size tyres i have

any suggestions appreciated ( btw 80% the car drives on tar and the odd trip up the beach)

Thats not all bad mate... I drive a 08 Hilux for work and it uses somewhere between 12-12.5lt/100km.
Anyway I'm with clunk71 on this one because I know i didn't buy my patrol for its fuel economy...

[TuffTD42]

By lifting your patrol you are now exposing more of the underside of the rig. You are now messing up the aerodynamics. This in turn will effect your fuel economy. I wouldn't of thought it would have made 2L/100 difference tho. The bigger the tyre diameter the more your fuel economy will suffer. You can change diff ratio's to help the power & fuel economy tho. I'm running 35's & 6" lift & getting anywhere from 12.5 to 13.4L/100.

[Mrowka]

The other advantage of bigger tires is that they make big obstacles into littler obstacles.

[dasemm]

I had 31's on 17' rims on the GU4,. but changed for 16" steel rims and 33's as a few years ago there was better availability of tyres for 16" rims in the bush. I never even considered fuel economy..

[snake1978]

ive only had it a few mths, but it does have a new injector pump, and probably blows a little bit more black smoke under load than it should
some1 suggested that it may need the injector pump tuned to the motor as it could be runnin rich, hence the smoke and 13.5 litre/100 when it should be closer to 11

[TuffTD42]

ive only had it a few mths, but it does have a new injector pump, and probably blows a little bit more black smoke under load than it should
some1 suggested that it may need the injector pump tuned to the motor as it could be runnin rich, hence the smoke and 13.5 litre/100 when it should be closer to 11

Now you mention the pump it could well be your issue. Or injectors. How's the air filter?

[YNOT]

Now you mention the pump it could well be your issue. Or injectors. How's the air filter?

I agree, replace the air filter and see what that does.
Also check the small gauze filter inside the banjo bolt where the fuel inlet hose connects to the back of the injector pump, if this is blocked it can cause black smoke.

Tony

PS, we may need to change the title of the thread to "Snakes questions" because we've well and truly gone off the tyre topic!!!

[Finly Owner]

Ok let me take it back to tyres:

Am I right in thinking;
That less revs turning small wheels will take longer to travel over the same distance than more revs turning bigger wheels? therefore, would balance out in fuel econony?


Tim

[growler2058]

I think i get where ya comin from Tim, like a 10 speed racer you use less energy to travel faster so therefor the economy should be better