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Unread 10-10-2012, 06:27 AM   #1
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Post Audi 80 PSI for Tires

G'day lads,

Matt-Matt from Overclock.net if anyone here knows the site, I was looking for a thread on there where I could make a post about my query but was lead to this site.

Anyway, I've recently acquired my P plates (In Australia that means I can drive alone.)

I'm using my parents old car, which is a 1992 Audi 80 (Auto) which has "low profile" tires according to dad so anything in the manual about PSI would be wrong I assume.

What sort of PSI would I be needing to put into these? Dad says 30 is right but they look (and feel) too flat at that, I've been running them on 35 where they feel a lot better and look like that's what they're meant to be at. I'd just like a more professional/enthusiast opinion on the matter.

If you need to I can check the tires tomorrow before I go to TAFE, I'm almost certain the car has 14" rims standard and I'm running 15" 1997 Audi Quattro rims. (I can take photos)

EDIT: Could be 15" standard and 16" is what I'm running, I know it's an inch bigger then standard and that's why it's running with low profile tires according to dad.

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Unread 10-10-2012, 01:13 PM   #2
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I think you are safe with either pressures. What are the factory recommendations?

What is the best pressure?

That depends on your driving. Generally the factory pressures are a good starting place for pretty much any tire you put on it. Most cars are 28-32 psi.

For hard driving I like to run them a bit higher to reduce the tire roll.

Generally a wee bit higher than factory recommendation will give you crisper steering input and longer tire life.

I think the factory recommendations favor a softer ride given by going with lower pressure.

Originally my Jimmy had off-road tires on it, now it has low pro tires. The factory recommend pressure was 32-35, front/rear. I started out running 35 and it handles great but the ride is harsh, thumping over every road patch. I've now dropped it to 30 psi and it rides much better, handling isn't quite as crisp. When I go auto-x'ing I'll put the pressures back up.
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Unread 10-10-2012, 08:33 PM   #3
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Yeah anywhere from 28-38 should be fine. Experiment, see what you prefer.

Would depend on the profile of the tires too.
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Unread 10-10-2012, 09:06 PM   #4
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The important factor everyone is missing here is the load factor. What was the original size and what size does it have now. From that info I can calculate the exact correct pressure you should be running for current tires.
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Unread 10-10-2012, 09:32 PM   #5
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Sidewall. I always say and use sidewall.
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Unread 10-12-2012, 01:05 AM   #6
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Quote:
Originally Posted by Mike View Post
Yeah anywhere from 28-38 should be fine. Experiment, see what you prefer.

Would depend on the profile of the tires too.
Yeah, going to have an experiment! I thought going past 35 or so was bad, to be honest I thought 35 was rather high. So far I prefer the ride of 35 because I'm more of a rough/speedy driver and the handling feels almost right. I noticed when the tires were flat it'd bounce around more/slide worse and not feel as smooth to turn (it was also a tad harder despite having power steering)

Quote:
Originally Posted by lautinjr View Post
The important factor everyone is missing here is the load factor. What was the original size and what size does it have now. From that info I can calculate the exact correct pressure you should be running for current tires.
Tire Size for 1991 Audi 80

14's to 15's then I'm certain as 16" sounds too big for what they are.
I'm actually happy that they're rated for 190+ as that's about what the car will do.. Unfortunately mine has a limiter and stops at 160 kp/h, not like I found that out myself

Thankyou for all the help everyone, +Rep to you all.
Also sorry if I didn't quote you, there is no multi quote here?

P.S Gonna try 37-38 next time I fuel up. Is there any advantage to having the back/front a higher pressure then the other set?

I also have a rather "large" friend, in spite he weighs about 150KG or so. He's just really really tall and a bit wide. I assume higher tire pressures would be better for this sort of stress on the car again?

Because it's 150KG on one side, and 95KG on the other (me). The car turns left a lot easier with him in the car

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Unread 10-12-2012, 12:29 PM   #7
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I know what the guide says I woukd need to know what option your car came equiped with and what size is on it now.
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Unread 10-12-2012, 01:34 PM   #8
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Quote:
Originally Posted by KSIMP88 View Post
Sidewall. I always say and use sidewall.
And everyone else will say you're wrong

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Unread 10-12-2012, 03:24 PM   #9
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Let's not argue
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Unread 10-12-2012, 08:24 PM   #10
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Quote:
Originally Posted by simfreak View Post
And everyone else will say you're wrong
What does he mean by a wall? lol

Quote:
Originally Posted by lautinjr View Post
I know what the guide says I woukd need to know what option your car came equiped with and what size is on it now.
It came with the 14" standard tires, the 1992 Audi 80 all had the same tires except for the Quattro which mine isn't. It's running 15" low profile tires now, all that I know about them is that they're Warrior R28's.

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