What Tyres Do You Recommend For FJC ?!
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caprihorse
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[quote=Melfi;16905]I wonder if this gripping thing was the issue I had yesterday. My car was going nowhere, had to constantly do loops to get up the crest, and when I would finally do, I'd get stuck at the top. I thought I was having engine issues, although it didn't sound as if I was. I just had no power at all...
I didn't seem to have this issue in Adrenaline / Liwa last week, although it seemed that I had a couple of psi less then... Perhaps I should drive the Cooper HTs with 8psi?:032:[/quote]
I didn't see you driving unfortunately, but based on the symptoms, you are describing, I would say, too much air in your tyres and it is not depending on your tyres brand. Generally speaking, it is not important, to see at deflation point, what number is showing your gauge, but to feel how is your car's ability to climb. I would be expecting that the driver behind you, she/he would give you a little hint...
Just for overall sharing my own explanation. In our last exploration in Liwa, on certain place I couldn't climb. Without any doubt on my engine performance or air filter cleanliness, I did know there is a problem with tyre pressure, just based on the feeling, that the car behaves somehow strange. Everybody knows, that I'm using a central deflation system, where it is guaranteed by Pascal Law, that all tyres have the same pressure at the deflation point. Logical.
At that place, when checking the pressure by manual pressure gauge, I realized that all the tyres had a different pressure, between 10 and 14 psi. I deflated them to 8 psi (yes, so low, as it was Liwa) and since that point no issue with climbs at all, if it was so called 'soft sand' and hard sand.
You may wonder, why a different pressure in all tyres with central deflation system? The logical explanation is, that all my tyres are made from different manufacturing batches, so it means, different rubber thicknes, different material composition, little dimensions differences (in 10/mm), etc., and during the driving the physical inside pressure conditions were changed, due to the friction.
Generally speaking, during the drive is advisable to check the tyre pressure, if you experience some climbing issues, and be sure that all tyres have the same pressure.
I didn't seem to have this issue in Adrenaline / Liwa last week, although it seemed that I had a couple of psi less then... Perhaps I should drive the Cooper HTs with 8psi?:032:[/quote]
I didn't see you driving unfortunately, but based on the symptoms, you are describing, I would say, too much air in your tyres and it is not depending on your tyres brand. Generally speaking, it is not important, to see at deflation point, what number is showing your gauge, but to feel how is your car's ability to climb. I would be expecting that the driver behind you, she/he would give you a little hint...
Just for overall sharing my own explanation. In our last exploration in Liwa, on certain place I couldn't climb. Without any doubt on my engine performance or air filter cleanliness, I did know there is a problem with tyre pressure, just based on the feeling, that the car behaves somehow strange. Everybody knows, that I'm using a central deflation system, where it is guaranteed by Pascal Law, that all tyres have the same pressure at the deflation point. Logical.
At that place, when checking the pressure by manual pressure gauge, I realized that all the tyres had a different pressure, between 10 and 14 psi. I deflated them to 8 psi (yes, so low, as it was Liwa) and since that point no issue with climbs at all, if it was so called 'soft sand' and hard sand.
You may wonder, why a different pressure in all tyres with central deflation system? The logical explanation is, that all my tyres are made from different manufacturing batches, so it means, different rubber thicknes, different material composition, little dimensions differences (in 10/mm), etc., and during the driving the physical inside pressure conditions were changed, due to the friction.
Generally speaking, during the drive is advisable to check the tyre pressure, if you experience some climbing issues, and be sure that all tyres have the same pressure.
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caprihorse
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[quote=pwood;16915]Hi Capri
Good points.
I am sure the temperature of the front and rear wheels were also different.
There is a big heater between the two front wheels and two little ones inside each rim.....
regards
Paul[/quote]
Actually, as we were driving in the morning to the south and sun was in the east on the left, my front left tyre had 9.5 psi and rear right had 14 psi... Pressure and temperature physical isotherm laws are very close to each other... I'll remember this for my life...
On the other hand I admit, that my tyres are just a mess at the moment... I'll never buy the same brand as I have, again...
Good points.
I am sure the temperature of the front and rear wheels were also different.
There is a big heater between the two front wheels and two little ones inside each rim.....
regards
Paul[/quote]
Actually, as we were driving in the morning to the south and sun was in the east on the left, my front left tyre had 9.5 psi and rear right had 14 psi... Pressure and temperature physical isotherm laws are very close to each other... I'll remember this for my life...
On the other hand I admit, that my tyres are just a mess at the moment... I'll never buy the same brand as I have, again...
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Melfi
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Capri - Remember that you told me to tell whoever deflated my tires to be more even next time? They were all supposed to be at 10 but ended being between 7.5 and 9.3 when you checked them?!
In any case, I'm now pretty convinced that pressure yesterday was just too high so I'll be trying 8-9 or so from now on. Pop-out was indeed a worrying thought in Liwa but until I get used to these new tires, it is a risk I am willing to take...
In any case, I'm now pretty convinced that pressure yesterday was just too high so I'll be trying 8-9 or so from now on. Pop-out was indeed a worrying thought in Liwa but until I get used to these new tires, it is a risk I am willing to take...
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caprihorse
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[quote=Melfi;16925]Capri - Remember that you told me to tell whoever deflated my tires to be more even next time? They were all supposed to be at 10 but ended being between 7.5 and 9.3 when you checked them?!
In any case, I'm now pretty convinced that pressure yesterday was just too high so I'll be trying 8-9 or so from now on. Pop-out was indeed a worrying thought in Liwa but until I get used to these new tires, it is a risk I am willing to take...[/quote]
I had these factors on my mind as I was writing this post and I'm not more blaming your buddy. I can never learn enough...
In any case, I'm now pretty convinced that pressure yesterday was just too high so I'll be trying 8-9 or so from now on. Pop-out was indeed a worrying thought in Liwa but until I get used to these new tires, it is a risk I am willing to take...[/quote]
I had these factors on my mind as I was writing this post and I'm not more blaming your buddy. I can never learn enough...
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Mosalf
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Hi there, I have stock tyres (Dunlop) and I am using 12PSI on my FJ. As Capri mentioned, when we stopped after 2 hours of driving for a break I did a recheck on the PSI on my tires and found that the PSI had shot off to 13-14 in different tyres (uneven expansion of air)
l gained a lot of confidence as I like the way the car behaved at 12PSI.
I havent driven much in the sand so am a bit green in all this, however I do agree with CAPRI, your car behavior teaches you a lot and as Bu Salem mentions in his signature, the Car and Driver both get modified eventually [IMG]http://www.almost4x4.com/vb/images/icons/icon10.png[/IMG]
Its all work in progress.[IMG]http://www.almost4x4.com/vb/images/icons/icon6.png[/IMG]
l gained a lot of confidence as I like the way the car behaved at 12PSI.
I havent driven much in the sand so am a bit green in all this, however I do agree with CAPRI, your car behavior teaches you a lot and as Bu Salem mentions in his signature, the Car and Driver both get modified eventually [IMG]http://www.almost4x4.com/vb/images/icons/icon10.png[/IMG]
Its all work in progress.[IMG]http://www.almost4x4.com/vb/images/icons/icon6.png[/IMG]
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Sarookh
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[quote=caprihorse;16918]Actually, as we were driving in the morning to the south and sun was in the east on the left, my front left tyre had 9.5 psi and rear right had 14 psi... Pressure and temperature physical isotherm laws are very close to each other... I'll remember this for my life...
On the other hand I admit, that my tyres are just a mess at the moment... I'll never buy the same brand as I have, again...[/quote]
Capri, what brand are your tyres???! :032: I have Kumho and they are good on road and offroad but i feel they are getting eating up very fast...:024:
On the other hand I admit, that my tyres are just a mess at the moment... I'll never buy the same brand as I have, again...[/quote]
Capri, what brand are your tyres???! :032: I have Kumho and they are good on road and offroad but i feel they are getting eating up very fast...:024:
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Sarookh
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[quote=caprihorse;16918]Actually, as we were driving in the morning to the south and sun was in the east on the left, my front left tyre had 9.5 psi and rear right had 14 psi... Pressure and temperature physical isotherm laws are very close to each other... I'll remember this for my life...
On the other hand I admit, that my tyres are just a mess at the moment... I'll never buy the same brand as I have, again...[/quote]
Capri, what brand are your tyres???! :032: I have Kumho and they are good on road and offroad but i feel they are getting eating up very fast...:024:
On the other hand I admit, that my tyres are just a mess at the moment... I'll never buy the same brand as I have, again...[/quote]
Capri, what brand are your tyres???! :032: I have Kumho and they are good on road and offroad but i feel they are getting eating up very fast...:024:
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Sarookh
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- Joined: Wed Dec 28, 2011 6:07 pm
[quote=caprihorse;16918]Actually, as we were driving in the morning to the south and sun was in the east on the left, my front left tyre had 9.5 psi and rear right had 14 psi... Pressure and temperature physical isotherm laws are very close to each other... I'll remember this for my life...
On the other hand I admit, that my tyres are just a mess at the moment... I'll never buy the same brand as I have, again...[/quote]
Capri, what brand are your tyres???! :032: I have Kumho and they are good on road and offroad but i feel they are getting eating up very fast...:024:
On the other hand I admit, that my tyres are just a mess at the moment... I'll never buy the same brand as I have, again...[/quote]
Capri, what brand are your tyres???! :032: I have Kumho and they are good on road and offroad but i feel they are getting eating up very fast...:024:
