okindao

Have owned 97 triple black 993 cab since 4/00. I am the second owner and bought car with 15,000 miles. As soon as I purchased I had installed H R sport springs really liked the handling. 7,000 miles and 8 Drivers Ed events later needed to replace rear tires only. since i did not want to mix tires and frankly had really liked the handling bought 2 18 inch Continental Conti's from tires rack to replace rears only. Same size and model.

Had asked dealer to rotate front tires from left to right and when he did so he indicated the car did not handle well in that it jumped .... so he resotred the fronts to the original positions.

just had the car on the highway for the first time and reached speeds well over 70 and it felt not as secure and stable as in past.

not sure if this is more in my head or not. Few questions :
1. does a new set of rear tires require a certain amount of breakin period to wera down, they still only have less than 50 miles on them ??

2. did not get the tires shaved or heat treated as since I am not racing on tracks wanted maximum longevity.

3. did not replace original shocks when the HR Springs were installed and the full alignment was done

It just feels like the rear is not as panted as it was before.

Appreciate any help or advice, this board has been a great source of information and a real learing forum.

thanks in advance for ideas or suggestions

hope everyone hear who particapates on this board has a happy holiday and a safe New Years

Regards

Greg Fishman

"1. does a new set of rear tires require a certain amount of breakin period to wera down, they still only have less than 50 miles on them ??"

Absolutely. It may take several hundred miles for them to lose the greasy feeling. Lots of info on this in the archives also.
This is most likely your problem.

STLPCA

Dennis
To add to what Greg said you might read the following from The TireRack:

[quote]
<a href="http://www.tirerack.com/tires/tiretech/general/break_in.htm" target="_blank">Breaking In Your Tires</a>

Tires are comprised of many layers of rubber, steel and fabric. Due to these different components, your new tires require a "break-in" period to ensure that they deliver their normal ride quality and maximum performance. As tires are cured, a "release lubricant" is applied to prevent them from sticking in their mold. Some of the lubricant stays on the surface of your tires, reducing traction until it is worn away. Five hundred miles of easy acceleration, cornering and braking will allow the mold release lubricant to wear off, allowing the other tire components to begin working together.It is also important to note that your old tires probably had very little tread depth remaining when you felt it was time to replace them. As any autocrosser or racer who has tread rubber shaved off of his tires will tell you "low tread depth tires respond quicker." Don’t be surprised if your new tires are a little slower to respond (even if you use the exact same tire as before). Their new, full depth brings with it a little more tread squirm until they wear down.<hr></blockquote>

Vinny '98 3.8 C2S

I know it sounds lame, but did you double check the pressures? Installers could easily have set the wrong pressures in the rear.

okindao

Greg, Dan and Vinnie,

Thanks for the response, sounds like I need to put some miles on the new Continentals

Vinne, I agree I checked that first and the tire pressure was fine.

Thanks to all for fast reponse feel better and have a great reson to put miles on prior to De event at VIR in April
Thanks

Greg Fishman

[quote]Originally posted by okindao:
<strong>
Thanks to all for fast reponse feel better and have a great reson to put miles on prior to De event at VIR in April
</strong><hr></blockquote>
No problem Dennis. You will love VIR, it is almost as good as Mid Ohio. Have fun.
Greg

fbfisher

New Pilot Sports on the rears caused my car to squirm and seemed to catch every crease in the road and toss the car from side to side. Problem stopped after about 1,000 miles. <img src="graemlins/beerchug.gif" border="0" alt="[cheers]" />

John H

Hey Dennis:

Did you notice a loss of horsepower/torque too? I have heard that your new tires may not properly seal and that the tires might be spinning on the wheels causing you to think the car has lost some of its get up and go. <img src="graemlins/roflmao.gif" border="0" alt="[hiha]" />
Sorry, saw that on the current dealer stories thread and could not resist.