Posted: Sat Nov 03, 2012 3:19 pm
[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.
