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Bigger Tyres = Less Power? More Fuel?

Tech Talk for Mitsubishi owners.

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Bigger Tyres = Less Power? More Fuel?

Post by burtbunch »

Hi All,

Quuestion: I have just fit 31x10.5x15 muddies to my NH 2.5TD. After recently spending a lot on the engine to recover lost power I have now lost power and fuel economy. About 100k's per tank!! And the dreaded black smoke is back again!!. Will my new tyres contribute that much too fuel economy and Power? I think the black smoke points to something more sinister...

More time on the hoist I think..

Burty
Take it Off Road or take it off the road!!!

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Post by NJV6 »

Sounds like a turbo issue. Something is definatley not right, your 31's would have made bugger all difference.
1994 NJ SWB, 3.5, 5 speed manual, 33's, XD9000, 4.9 diffs, Front & Rear ARB's, Safari Snorkel

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Post by constapa »

Black smoke = Wrong fuel mixture.
100 km's per tank = Wrong fuel mixture (or a hole at the tank :lol: )
Man, this an insane consumption...
Pajero '87 soft top, 2.6L turbo EFI mod, ARB locker, 2" lifted OME, 31's M/T
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Post by burtbunch »

No mate,

I lost 100 per tank. I'm down to 500 from about 600 around town. Crikey 100 per 80 litres jeez I'd have to be an oil Baron!!
Take it Off Road or take it off the road!!!

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Post by psycronic »

still could be an over fueling problem
NH 2.5TDI LWB GLS
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Post by burtbunch »

Yeah, I just got back from the workshop that fixed it. They reckon I got dirty fuel. And Embarrassingly I had a slightly blocked air filter element. (Beach Driving)!!! New element hasn't made too much difference tho so I will see what happens with the fuel. I'm only buying BP from now on.

Cheers

Burty
Take it Off Road or take it off the road!!!

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Post by j-top paj »

burtbunch wrote:Yeah, I just got back from the workshop that fixed it. They reckon I got dirty fuel. And Embarrassingly I had a slightly blocked air filter element. (Beach Driving)!!! New element hasn't made too much difference tho so I will see what happens with the fuel. I'm only buying BP from now on.

Cheers

Burty


run a tank of b100 biodiesel to clean it out..
i used to run bio in mine and it made heaps of difference
Banzy wrote:Dial up internet.........you'd post something and come back 2 beers later to see if it loaded.
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Post by burtbunch »

righto. New air filter made a little difference. Fuel Filter going in tonight. Where do I buy Bio Diesel?

Burty
Take it Off Road or take it off the road!!!

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Post by j-top paj »

not sure where in QLD but there should be a few places that sell it by now..
there is a bio diesel forum that lists all the servos that sell it in oz.
cant remember the name of the forum but.
Banzy wrote:Dial up internet.........you'd post something and come back 2 beers later to see if it loaded.
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