wogs73

Need to know the correct tire pressure for my 73.

Thanks :p:

Fevre

Check the tires, specs are usually on them.

BTW :seeya neighbor.


[Modified by Fevre, 11:42 AM 4/7/2004]

JBR

My 75 owners manual calls for 23psi. But that was with 30 yr. old tire technology. Everyone tells me to run 32psi. front and rear. I do and it works great.

wogs73

Thanks for the replies. On my door it says 20psi and I thought that was too low. 32 sounds about right. ;)

Super Stock

In 73' the bowtie brigade was desperately trying to get a smooth , soft ride and when they went to the new radials they went to 20#.

NHvette

28, 30, 32 ... depends on the tire, size, and how you drive it.
20 is just wrong, unless it's the rears at the dragstrip.
:seeya

KenSny

I think you will find that the MAX PRESSURE is what is on the sidewalls of the tires. Don't run on MAX PRESSURE! Tires need to be inflated depending on the weight/vehicle load. Think about it - it would be next to impossible for a tire manufacturer to state one tire pressure on the tire knowing that many different vehicles could use them. They'd be sued for sure!

Fevre

So should he run it at 20? :confused: True it states the max (just checked all 3 of my vehicles, vette states 35, Formula states 40 and Sonoma states 50) but I would use that as a starting guideline before anything else. How could the vehicle manufacturer know what tires (and rims) you are going to put on it after the originals wear out? Catch 22, refer to the tire not the owners manual of a 30 year old car IMHO.

wogs73

Thanks again for all the replies! My tires state max pressure at 35 psi. They are BFG T/A radials. I've got them at 32. Will try that for a while. :thumbs:

KenSny

The radials of the 70's were of a stiffer sidewall and were made to be used on all the cars of the day. The Corvette was one of the lighter cars being made then, even though we think they are heavy now, so 20 lbs for the tire pressure gave good performance and helped the tires to "stick" when cornerning. Can you imagine putting 35 lbs in a 70's radial and taking a corner? You'd be slidding in circles.....

Fevre

Posting again so you don't get a blow out, check the tires, the recomended psi should be on them.

:seeya

gliot1

A tire man recently told me the general rule for modern radials is 32psi; you can't go wrong.

KenSny

Fevre - Did I say that? NO. In fact since the posting times are all messed you will will see that I posted regarding the 20lbs and old radials.

Note that I did say "Tires need to be inflated depending on the weight/vehicle load." If you use the MAX as a starting point you are going to be overinflating your tires and they will wear quickly. Best to check for tire pressure by vehicle weight with the tire companies. I would not run more than 30-32 lbs on my Corvette's tires and expect to get good wear.

You will not find any tire company, etc. that will recommend inflating your tires at the MAX pressure.

Good luck!

Cajun99

Depends on your tires. I run 30psi cold in my BFG T/As...comes up to 32-33psi when hot and they're wearing perfectly. :yesnod:

Fevre

Just in case you where unfamiliar with the def of guideline:


guideline

n 1: guidance relative to setting standards or determining a course of action 2: a light line that is used in lettering to help align the letters 3: a rule or principle that provides guidance to appropriate behavior

MILO851

OK as long as we are posting This is what I was taught take it for what it is worth . Start with 32 psi then mark the tire tread with paint or chauk or something similar. Drive car around the block if the paint is all gone you are good if there is more paint left in the center of the thread add more air psi if the edges have paint remove some psi. This way you have the largest contact patch. That said I run 26 on the rear and 28 on front this also smothes the road out alittle bit

KenSny

Geezzzz - Don't need definition lessons from you - thanks anyway!

Get a grip on what you said: "starting guideline" So you think we should start at MAX and work down? Doesn't make sense to argue this point with you anymore.......

Bye!

lostpatrolman

Wow ken, you sound like a little school girl. When is the cr fight gonna be? You need to grow up man.
And milo, reguarding your technique. Is that after the tires are warmed up, or cold?

turtlevette

MILO851,

what does it do in the 1/4 with the blower. I assume you put some sort of hood scoop in?

I have to run around 20-25 pounds in my Indy 500s else they ride like rocks.




[Modified by turtlevette, 9:20 PM 4/9/2004]

MEAN72

:iagree: I posed the same question about four weeks ago and received a variety of answers. I even talked with the manufacturer to no avail. I finally setttled on 28-30 psi on my 1972. I think 28 is closest to the right answer for normal street driving. Years ago, when I switched from bias ply to radial, the BF Goodrich tire engineer told me 28 psi. They are not as staight forward today at Firestone, however :rolleyes: