Dipstick Neutral Newbie August 16, 2006 Author Share August 16, 2006 This might be of some info. ↡ Advertisement Link to post Share on other sites More sharing options...
Kanchelsk 2nd Gear August 16, 2006 Share August 16, 2006 thanks... Link to post Share on other sites More sharing options...
Kanchelsk 2nd Gear August 16, 2006 Share August 16, 2006 physics is complusary studies now... although my time is biology... Link to post Share on other sites More sharing options...
Dipstick Neutral Newbie August 16, 2006 Author Share August 16, 2006 (edited) Generally, there are trade-offs when replacing stock tyres with broader ones such as: 1.Increased unsprung weight, broader tyres have more mass. 2.More road noise, due to more rubber hitting the road surface (but softer compound can negate that). 3.More rolling resistance, can worsen fc. 4.More probability of aqua-planing (but better tread designs can reduce that) 5.Higher cost to purchase. But you get better cornering and braking grip. Plus your ride look fiercer Edited August 16, 2006 by Dipstick Link to post Share on other sites More sharing options...
Dipstick Neutral Newbie August 16, 2006 Author Share August 16, 2006 You're most welcome, bro. Link to post Share on other sites More sharing options...
Nhrisuzu 1st Gear August 16, 2006 Share August 16, 2006 1.Increased unsprung weight, broader tyres have more mass. 2.More road noise, due to more rubber hitting the road surface (but softer compound can negate that). 3.More rolling resistance, can reduce fc. 4.More probability of aqua-planing (but better tread designs can reduce that) 5.Higher cost to purchase More rolling resistance = Increase in FC.. higher Fuel Consumption.. i think u meant worst FC?? Link to post Share on other sites More sharing options...
Dipstick Neutral Newbie August 16, 2006 Author Share August 16, 2006 (edited) You are right. That's what I meant. Have corrected it. Thanks. More rolling resistance can also affect pick-up speed/acceleration. Edited August 16, 2006 by Dipstick Link to post Share on other sites More sharing options...
Shaguar Neutral Newbie August 16, 2006 Share August 16, 2006 Hi guys is there a formula/method to calculate the correct air pressure. I'm running on 225/55/16 but am not sure how much i should pump in... Link to post Share on other sites More sharing options...
Kanchelsk 2nd Gear August 16, 2006 Share August 16, 2006 Summary of ur point: to look fierce n have performance compensate with fuel consumption n $$$ Link to post Share on other sites More sharing options...
Dipstick Neutral Newbie August 16, 2006 Author Share August 16, 2006 (edited) The recommended tyre pressure indicated on the door pillar may be a good starting point. Check the tyres regularly. If there is more wear on the outer edges of the tread, increase the pressure. Similarly, if there is more wear on the centre of the tread, reduce the pressure. Of course, you also need to take in consideration the ride comfort of the tyres. I don't know of any formula for calculating the optimum tyre pressure. Any such formula would have to take into account the live and dead load of the vehicle as well as the tyre size/profile/construction. Does anyone know? Edited August 16, 2006 by Dipstick Link to post Share on other sites More sharing options...
Silver_blade Turbocharged August 16, 2006 Share August 16, 2006 eh tyre pressure dependant on size...not brand....wat is ur tyre size? 16"?...and the car you're driving. Link to post Share on other sites More sharing options...
Zakuii 1st Gear August 16, 2006 Share August 16, 2006 Recommended 32 PSI, I over-inflat to 38 when tyre is hot. Link to post Share on other sites More sharing options...
Shaguar Neutral Newbie August 16, 2006 Share August 16, 2006 Hmm just checked it says 29psi- lightload, 32psi-heavyload and +4psi for warm tyres. My main concern is fuel consumption so will it help if i pump 32psi even though they car is very often lightly loaded? Link to post Share on other sites More sharing options...
Geogeo Neutral Newbie August 16, 2006 Share August 16, 2006 I usually over pump my tires to about 38PSI (which I believe most tires can hold more than 40PSI) before my car stopped for overnight. The next morning I'll use my tire pressure gauge to release & measured to my expected pressure. Factory recommended pressure Front - 32PSI Rear - 29PSI My expected pressure Front - 36PSI Rear - 34PSI Although the drive feels a little bumpy, but I rather not have increased FC due to under inflated tires. Of course, I'll try best to aviod pots holes (if there's any) & drive slow over uneven road. Link to post Share on other sites More sharing options...
Dipstick Neutral Newbie August 16, 2006 Author Share August 16, 2006 It's alright, if you do not find the ride uncomfortable. In your case, 32 psi would be good for your fc rather than 29 psi. Link to post Share on other sites More sharing options...
Dipstick Neutral Newbie August 16, 2006 Author Share August 16, 2006 (edited) 4 to 5 psi above the recommended pressure is a bit too uncomfortable for me. I personally would only go for a max of 3 psi over the recommended pressure. Anyway, the pressure starts to go down at the rate of 1 to 2 psi per month due to the porosity of the tyre material and the valve. It's not 100% air-tight. At most I only need to pump it up again after a month or so, sometimes even two months. A point to bear in mind though. Higher tyre pressure means smaller contact patch between the tyres and the road surface, reducing grip as a result. For those who drive fast and furious, keeping to the optimum recommended tyre pressure is best. Edited August 16, 2006 by Dipstick Link to post Share on other sites More sharing options...
Geogeo Neutral Newbie August 16, 2006 Share August 16, 2006 I'm more concern in FC, therefore Fast & Furious is out for me. Link to post Share on other sites More sharing options...
Dennisk Clutched August 16, 2006 Share August 16, 2006 for 15", safe pressures are 220-225kPa....that is on the mid-range side Low sould be 190-210, and high would be 230kPa u shld experiment to suit ur comfort level what should it be for 16" ↡ Advertisement Link to post Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In NowRelated Discussions
Related Discussions
Portable Tyre Pump
Portable Tyre Pump
Pump Petrol In JB - Worth it
Pump Petrol In JB - Worth it
How often do you pump air for tyres?
How often do you pump air for tyres?
Bedok Esso faulty pump
Bedok Esso faulty pump
Here we go again... Pump price up
Here we go again... Pump price up
The Journey Of Your New Car – getting pumped
The Journey Of Your New Car – getting pumped
Pump Diesel in JB
Pump Diesel in JB
Fuel Pump Change
Fuel Pump Change