Tyre pressures and life of engine oil
04-21-2002, 06:51 AM
#1
Instructor
Thread Starter
Tyre pressures and life of engine oil
What tyre pressures do we all run? The ones recommended are 36 all around on a set of 17s - not sure what is recommended for 18s.
General consensus seems to be to drop pressures on a track - by how much?
On oil - I am about to stock up on oil which i can buy cheapish at the moment (using an employee discount). How long can it keep or is it indefinite? eg if i buy say 50 litres, will it last a few years in the cans?
General consensus seems to be to drop pressures on a track - by how much?
On oil - I am about to stock up on oil which i can buy cheapish at the moment (using an employee discount). How long can it keep or is it indefinite? eg if i buy say 50 litres, will it last a few years in the cans?
04-21-2002, 07:16 AM
#2
Addict
Rennlist Member
Rennlist Member
Join Date: Feb 2002
Location: London UK
Posts: 1,329
Likes: 0
Received 0 Likes
on
0 Posts
I run 36 all round on my 18". I find that there isnt much turning lock at the front but I assume thats to do with the 18" and not the air.
IMHO On track I would assume a little higher at the back and not much more at the front. But then I dont have any track experience.
I think there are threads on this in the past where some have used 40/42 on the back.
Youlle soon be the local oil supplier!! Hee Hee <img src="graemlins/xyxwave.gif" border="0" alt="[bigbye]" />
IMHO On track I would assume a little higher at the back and not much more at the front. But then I dont have any track experience.
I think there are threads on this in the past where some have used 40/42 on the back.
Youlle soon be the local oil supplier!! Hee Hee <img src="graemlins/xyxwave.gif" border="0" alt="[bigbye]" />
04-21-2002, 12:14 PM
#3
Rennlist Member
[quote]Originally posted by Bins:
<strong> IMHO On track I would assume a little higher at the back and not much more at the front. But then I dont have any track experience.
I think there are threads on this in the past where some have used 40/42 on the back.: </strong><hr></blockquote>
Actually, less tire pressure on the track is more beneficial. I run my factory 17" with 32psi (cold) front, 34psi(cold) rear on the street, and drop these by 2-4psi's when on the track. High tire pressure (>40psi) would make your car slip and slide way too much.
I think the general consensus on this board is that 40psi is too much for any type of driving. Experiment and find your happy medium!
<strong> IMHO On track I would assume a little higher at the back and not much more at the front. But then I dont have any track experience.
I think there are threads on this in the past where some have used 40/42 on the back.: </strong><hr></blockquote>
Actually, less tire pressure on the track is more beneficial. I run my factory 17" with 32psi (cold) front, 34psi(cold) rear on the street, and drop these by 2-4psi's when on the track. High tire pressure (>40psi) would make your car slip and slide way too much.
I think the general consensus on this board is that 40psi is too much for any type of driving. Experiment and find your happy medium!
04-21-2002, 12:35 PM
#4
Addict
Rennlist Member
Rennlist Member
Join Date: Feb 2002
Location: London UK
Posts: 1,329
Likes: 0
Received 0 Likes
on
0 Posts
Just found the following thread...
Hope it helps
<a href="http://forums.rennlist.com/forums/ultimatebb.php?ubb=get_topic&f=3&t=002503" target="_blank">Topic: Inflation pressure 18" wheels??</a>
Regards
Hope it helps
<a href="http://forums.rennlist.com/forums/ultimatebb.php?ubb=get_topic&f=3&t=002503" target="_blank">Topic: Inflation pressure 18" wheels??</a>
Regards
04-21-2002, 06:54 PM
#5
Addict
Rennlist Member
Rennlist Member
Singh:
I use 32/34 F/R on my 18s (SO2s) and that seems to be pretty comfortable on the street. Pressures may vary given different alignment settings and, perhaps ride height changes relative to stock – especially if the ratio of front to rear changes. My car is set exactly to RS specifications using oem RS suspension components.
Other than in a Speed World Challenge race, I have never run my street tires on the track, but I can tell you that the tires will grow 8-10 PSI when they get hot, assuming you filled them with air. Dry nitrogen grows at a consistent 7 PSI. The Toyo tires we use in SWC seem to perform best at about 39-41 PSI so we start them out at 32-33 cold with nitrogen. I think that is probably a good baseline for most high performance street tires. You’ll have to adjust from there to find a comfortable balance for yourself.
You can store oil for a long time especially if it’s sealed. I would guess indefinitely, but surely 3-5 years would be no problem. As I’m sure you’re aware, you’ll probably want to avoid direct exposure to sunlight and drastic changes in temperature.
Hank
I use 32/34 F/R on my 18s (SO2s) and that seems to be pretty comfortable on the street. Pressures may vary given different alignment settings and, perhaps ride height changes relative to stock – especially if the ratio of front to rear changes. My car is set exactly to RS specifications using oem RS suspension components.
Other than in a Speed World Challenge race, I have never run my street tires on the track, but I can tell you that the tires will grow 8-10 PSI when they get hot, assuming you filled them with air. Dry nitrogen grows at a consistent 7 PSI. The Toyo tires we use in SWC seem to perform best at about 39-41 PSI so we start them out at 32-33 cold with nitrogen. I think that is probably a good baseline for most high performance street tires. You’ll have to adjust from there to find a comfortable balance for yourself.
You can store oil for a long time especially if it’s sealed. I would guess indefinitely, but surely 3-5 years would be no problem. As I’m sure you’re aware, you’ll probably want to avoid direct exposure to sunlight and drastic changes in temperature.
Hank
