How much do insa turbo specials affect fuel economy?

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Adammorris08

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Exmouth
My gf and I have just bought a 1994 300tdi auto that's running 265/75 r16 insa turbo special tracks.

I know they will drop the mpg but I was wondering how much they will effect it?

She's worried she will be spending lots extra compared with road tyres.

But her drive to work is only 7.5 miles each way.

I am about to fit a timber trail boost pin to it which should hopefully allow it to drive one gear higher and improve the mpg.

Any ideas?

Cheers
Adam
 
if she isn't going to do any real offroading then sell them and fit roadies

it's pointless for her to have them on, they will wear faster, more noise and be more slippery in the wet
 
We will be doing some laning. Probably once or twice a week. So ideally would like to keep them. She works at an agricultural/outdoors college which is quite muddy so they do help her.

We might be getting a second set of wheels with some at/road tyres so swap over when necessary but I don't think either of us are up for swapping wheels all the time >_<
 
If you are worried about MPG you have the wrong vehicle. You basically have a small out building on wheels being powered by an agricultural engine mated to an autobox.

Keep the wheels and tyres and run it on a mix of veg oil. its about 60p Litre in costco at the moment so will save you a heap of cash.
 
We will be doing some laning. Probably once or twice a week. So ideally would like to keep them. She works at an agricultural/outdoors college which is quite muddy so they do help her.

We might be getting a second set of wheels with some at/road tyres so swap over when necessary but I don't think either of us are up for swapping wheels all the time >_<

upto you then, special tracks are very aggressive and good for the mud.. but if it's only slight laning (bit of mud, but mostly rough tracks) then some at's might suit a lot more.
 
We're not worries about economy really. Unbelievably as it is it gets better mpg than her old 1.3 petrol fiesta.

I'm thinking of getting some oil to run on as I've got a bookers account.

But also was considering setting up a filtering station at home as I am a head chef and have access to a lot of used cooking oil in good condition.

Mainly just interested to find out how much it drops mpg as everyone is always saying 'oh your mph is going to go through the floor with those wheels.....'
 
We're not worries about economy really. Unbelievably as it is it gets better mpg than her old 1.3 petrol fiesta.

I'm thinking of getting some oil to run on as I've got a bookers account.

But also was considering setting up a filtering station at home as I am a head chef and have access to a lot of used cooking oil in good condition.

Mainly just interested to find out how much it drops mpg as everyone is always saying 'oh your mph is going to go through the floor with those wheels.....'

if you can get a load of wvo, then yeah have at it.. you'll save a packet :)
 
My gf and I have just bought a 1994 300tdi auto that's running 265/75 r16 insa turbo special tracks.

I know they will drop the mpg but I was wondering how much they will effect it?

She's worried she will be spending lots extra compared with road tyres.

But her drive to work is only 7.5 miles each way.

I am about to fit a timber trail boost pin to it which should hopefully allow it to drive one gear higher and improve the mpg.

Any ideas?

Cheers
Adam

Insa Dakars are a much better all round mud tyre, more than adequate for laning and occasional off road use, and not so noisy and unmannerly on the road. Special track are good for p&p, trials etc.

You might improve the mileage per gallon by upping the pressures a bit, but you may also lose some grip.
 
Would 35psi be suitable for the road?

I wouldn't have thought it would be a problem. D2 rears can go up to 40psi for towing, as can a 90. I have never had a D1, check your owners manual, and any info on the tyres themselves.

Usually the bigger the tyres the softer you run them, tractor rears only take about 10 psi. But if you are concerned about economy, running a bit more will help, may make them a fraction less noisy too.
 
35 should be ok. I run our slightly heavier disco 2 at anything between 35 ~ 40 psi for getting to and from off-road events ( but always same for all 4)
I wouldn't keep them on all the time though as roadgrip when wet & especially when icy is terrible !

PS i'd estimate i lose upto 10 mpg vs ATs when using the Special Tracks
 
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My old series 1 swb had old mud tyres on it and they were starting to perish so I took em and the modulars off and put a nice set of used michelins and td5 steel rims on, painted em green they looked mint!
Got a shock at how the truck would roll forwards when sitting in traffic, it never used to move on the old tyres.... Just goes to show how smoother rubber is more economical
 
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