Tyres & Rust treatment on 80 Series 1HD-FT

Submitted: Thursday, Jan 02, 2003 at 01:00
ThreadID: 2772 Views:1894 Replies:7 FollowUps:8
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G'day, I would like to put some new rubber on the Truck and was considering 285s (75 series) which will raise it by 30mm and should also lower engine rev when cruising at 100 kph (better fuel economy & additional clearance under axle). Have you guys done that? Is there been any downside on overtaking responds and effect on handing?
Have also given the 97 Beast a Anti rust treatment lately. Any tips on potential rust spots or area to pay attention to? Cheers
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Reply By: Bob Y. - Thursday, Jan 02, 2003 at 01:00

Thursday, Jan 02, 2003 at 01:00
Happy New Year, Will, We have same model as you, and it had 265/75R16's on it when we bought it 2nd hand. Even after having the pump done up, it has never been a ball of fire, although we are happy with it. Put a 3" exhaust on it which makes it pull better, and a little more economical. Prior to this we had a 90 model factory turbo, which had 31x10.5R15 tyres on it and it would pull like a train anywhere, and really growl when you pulled out to pass a triple road train.

My point would be that with the 285's you might well loose some of that grunt these vehicles are renowned for. Economy may suffer a little too, because you would have to feed a bit more fat when overtaking, or in hilly terrain.

Don't know about rust areas, we haven't had enough rain here in last 2 years to promote any! Regards...
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Reply By: OziExplorer - Thursday, Jan 02, 2003 at 01:00

Thursday, Jan 02, 2003 at 01:00
If you check on the Choice website, they had an extensive survey and test a couple of years back about rust proofing. The findings from memory, was none is best, and rust proofing material actually seals in moisture and promotes rust. From memory they said vehicle storage/parking was important in stopping rust. The vehicle needed free flowing air when garaged as being driven in hot if there was not free flowing air it greatly enhanced rust. Cannot remember all the details, so check out their website. I have not used rust proofing for over 10 years, and if you notice you don't see companies promoting it like they did. Modern cars really don't rust.
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Follow Up By: Axel - Thursday, Jan 02, 2003 at 01:00

Thursday, Jan 02, 2003 at 01:00
Modern cars really dont rust ? What planet and / or drugs are you on ?? Try and buy a vehicle at any of the major dealers in brisbane and all will try to sell you various forms of rust proofing , new car or 2nd hand.
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Follow Up By: Oziexplorer - Thursday, Jan 02, 2003 at 01:00

Thursday, Jan 02, 2003 at 01:00
Axel do you see modern cars as rust buckets on the road these days - no
According to the research rust proofing aids rusting. Because Brisbane motor dealers are ripping you off, does not mean this happens in other parts of the cournty. The modern steel coating technology and construction methods ensures modern cars do not rust. We have some six wheel drive vehicles that are ten years old with absolutly no rust in them whatsoever. Sure they have been re-built mechanically, but never any work done for rust as they have none.
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Follow Up By: Axel - Thursday, Jan 02, 2003 at 01:00

Thursday, Jan 02, 2003 at 01:00
Funny that ,, last time i looked at a new car for the wife [3 weeks ago],Toyota camry build date OCT 2002 found rust in 3 areas,,,the only reason you dont see as many so called rust buckets is because people DO invest in the differrent forms of rust proofing,,,head out west and rust becomes less of a problem,yet even dealers such as Black Toyota in Dalby who sell more 4x4 than the size of the town would dictate [toyota dealer of the year more often than you have brain cells] recomends a supplementory rust proofing system be used and or applied,not necessarily in house,,,,
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Follow Up By: Oziexplorer - Thursday, Jan 02, 2003 at 01:00

Thursday, Jan 02, 2003 at 01:00
Axel just typical of the usual rip-off profit maximising sales tactics and practices of Toyota dealers.
Go and do your research on so called rust proofing and you will see it causes rust, not cures it.
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Follow Up By: Axel - Thursday, Jan 02, 2003 at 01:00

Thursday, Jan 02, 2003 at 01:00
Ozi, when will you actually read the question /responses before answering???
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Follow Up By: Rodeoowner - Thursday, Jan 02, 2003 at 01:00

Thursday, Jan 02, 2003 at 01:00
Ozi, do you have that article from Choice magazine? I checked their website, but can't find it.
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Follow Up By: Oziexplorer - Thursday, Jan 02, 2003 at 01:00

Thursday, Jan 02, 2003 at 01:00
Rodeoowner no I don't but remember most of the details quite clearly. I don't hoard stuff at all, being a mobile road warrior. e-mail them as they are a great bunch of people that have always replied to anything I have asked.
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Reply By: Axel - Thursday, Jan 02, 2003 at 01:00

Thursday, Jan 02, 2003 at 01:00
Good site for 80series www.safari4x4.com.au Has heaps of tech info and mods including where to look for rust ect.,
AnswerID: 10447

Reply By: Axel - Thursday, Jan 02, 2003 at 01:00

Thursday, Jan 02, 2003 at 01:00
Oops,full address,,,http://www.safari4x4.com.au/80scool/tech/technical.html
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Reply By: diamond - Thursday, Jan 02, 2003 at 01:00

Thursday, Jan 02, 2003 at 01:00
just be carefull before fitting 285 as you said will give you 3o mill lift but iv vic not sure where you are you can only go+/- 15 mill if a 285 gives you a 30 mill lift that would be an overall increase of 60mill in diameter.best to check before you spend big$$$$$ on tyres and then find out your unroadworthy
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Reply By: Derek - Sunday, Jan 05, 2003 at 01:00

Sunday, Jan 05, 2003 at 01:00
Wil, I agree with one of the above postings. I have a naturally constipated 1HZ and run BFG 285/75 R16 in order to get the extra clearance off-road. You will find that you will lose acceleration, put your speedo out, reduce your braking efficiency and possibly get worse fuel consumption (depending at what speed you drive it). By fitting the larger tyres you are raising the overall gear ratio of the car. Despite this I live with the aforementioned 'down points' as ground clearance is of more importance to me. See if the tyre company will let you try a set before you buy. Copya.
AnswerID: 10635

Follow Up By: Wil - Monday, Jan 06, 2003 at 01:00

Monday, Jan 06, 2003 at 01:00
It's nice to know that the fuel economy goes the other way, with a rather small increase in radius(diameter). My immediate thoughts was to go 285s with the height gain advantage and the Turbo diesel motor generating awesome torque at a lowish 1500-1800 rpm. If we could get it cruising at closer to 2000 rpm when doing 100K/h would be greater efficiency.
I am getting 11-12 litres per 100 K currently with my 265s. How does that compares to yours? Generally my TLC will only be used on trips in excess of 20Ks from home, otherwise we use our petrol car. (Seems diesel loves the long hot running only)
Cheers
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Reply By: Derek - Monday, Jan 06, 2003 at 01:00

Monday, Jan 06, 2003 at 01:00
Wil. Most people think that by lowering their RPM for a given speed in top gear they will use less fuel. This may be true in some instances but I think in most instances the car will use more fuel as the engine is not running at it's 'sweet spot'. The engine is actually labouring slightly! If cars could run at a higher ratio the manufacturers would make them that way. Turbo 80 series have a taller 1st and 2nd gear than the n/a 1HZ but the other 3 gears are of the same ratio. A turbo 80 series is quicker away from the lights not just because of the extra power but because of the altered ratios that compliment the extra power. My 1HZ gives me around 12 ks per litre but with the speedo/odometer reading about 10% out it is difficult to say. I've stopped worrying about the car's fuel consumption as I figure I have to have the car. I would however panick if it suddenly worsened for no obvious reason. My brother owns a turbo 4.2 GU and we recently went to Rocky and back towing vans and both cars got nearly the same MPGs. If you do a bit of serious off-roading then I'd go for the 285's, but if most of your driving is on-road or easy off-road, then I'd stick with the proper tyre size. Hope this is of some help.
AnswerID: 10652

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