break in period?
Login  | |
|
|
|
|
|
|
|
|
|
|
|
|
|
RE: break in period? - 5/18/2006 11:59:19 AM
|
|
|
racepet
Posts: 81
Joined: 4/18/2006
Status: offline
|
Impy,
I got 10.8 on the first tank, averaging low 13's now mainly LA city driving after 1600 miles. It does not seem to matter if I gun it or drive like Morgan Freeman. Just bumped the tires up to 39psi from 30psi and it looks like I will do about 1 mph better.
|
|
|
|
|
RE: break in period? - 5/18/2006 1:01:04 PM
|
|
|
Linus Gump
Posts: 960
Status: offline
|
I just replaced my tires with a more aggressive tread but stayed with the stock size. At 35 psi the tread centers would be hot after a short freeway drive, or a surface drive across town. Also, if I drove over some dirt on the road, only the center would pick it up. I dropped them to 30 psi and the temp is much cooler and more even across the tread, but now the TPS comes on until the tires warm up. The ply layers are the same bewteen the two tires, so if you do increase your pressure, keep a close eye on tread wear.
|
|
|
|
|
|
|
|
|
|
|
|
|
RE: break in period? - 5/18/2006 6:11:55 PM
|
|
|
Linus Gump
Posts: 960
Status: offline
|
I know they are cooler because I put my hand on them as soon as I got home, and the tread center was very warm, bordering on hot. The next day, before I went out, I dropped the pressure down to 30, and drove about the same distance and checked the tires again by placeing my hand back on the tread surface. Not only was the temp more even across the entire tread surface, it was much cooler to the touch. The conditions were about the same for both trips, so the comarison should be fair. The higher temp is probably because that one small strip of tread in the center was doing all of the work for the entire tire.
|
|
|
|
|
RE: break in period? - 5/18/2006 6:27:44 PM
|
|
|
Linus Gump
Posts: 960
Status: offline
|
One thing you have to keep in mind about tires is that the best pressure is one that spreads the weight of the vehicle evenly aross the entire tread surface. The weight of the vehicle will mandate this more then anything, up to the max pressure stated on the side wall. Think of a full size diesel pickup loaded to the max with camping and offroad gear running something like a 14 inch wide swamper. The truck would require a higher pressure in the tires then that same tire on say a lightly loaded old flat fender Jeep. At max pressure, the tire will properly support the max weight printed on the side wall. The Firestone tires were under inflated for thier use. If you run a pressure under the ideal pressure for your vehicle, you will cause under inflation damage to the tire, up to and including Firestone sequals. If you run higher pressure the the ideal pressure, you will cause over inflation problems such as poor tread wear and tire life, including the tire coming apart as well. The construction of the tires also play a role in what pressure to run, but that is harder to read with a stiff multilayer sidewall and tread that doesn't allow for much flex of the tire.
|
|
|
|
Contact Us |
Advertising |
Automotive Directory |
About Us |
Link To Us |
Archive |
Hummer Links |
Legal |
Privacy Policy |
© Hummer Forums.com
Hummer Forums .com is not affiliated with or endorsed by General Motors Corporation.
|
Printable Version
but if that is true why do the Cup cars on sundays need 3-10 laps to come up to speed based on tire pressure being to low. I have heard DW say the pressures in some cases are in single digits. I used to run BFG AT's at top psi 10 years ago and they ended up looking like a bald guy after 15000 mi, (I did it because I put a lift kit and tires on a manual steering base model).
