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CC Advertisers
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03-24-2003, 02:31 PM
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CC Member
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Join Date: Jul 2002
Location: rocky river,
Oh
Cobra Make, Engine: Unique 289FIA / SA 351W / a truly glorious machine
Posts: 3,949
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Not Ranked
tire pressures???
need info on tire pressures BFG TA's Unique FIA
351 W
Checked them today after long winter and found variables in pressures.... 15 to 22lbs.
Any input????
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03-24-2003, 04:07 PM
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CC Member
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Join Date: Feb 1999
Location: Kansas City,
MO
Cobra Make, Engine: CRL, 351W, Tremec TKO
Posts: 2,299
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Not Ranked
Input? Sure: it looks like there is quite a range of air pressure in your tires. Some have more air than others.
I'd say fill 'em up, and check 'em in a week.
__________________
Pete K.
Who is John Galt?
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03-24-2003, 06:02 PM
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CC Member
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Join Date: Nov 1999
Location: Harrison Township,
MI
Cobra Make, Engine: Superformance, 460/560hp
Posts: 55
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Not Ranked
There was a recent thread on tire pressures. Please search....you get lots of good information.
Jeff
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03-24-2003, 06:35 PM
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CC Member
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Join Date: Oct 2002
Location: Jacksonville, FL,
Posts: 47
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Not Ranked
I run 35 rear and 30 front in mine.
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Ham Todd
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03-25-2003, 10:35 AM
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Renegade Nuns on Wheels
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Join Date: Aug 2001
Location: columbus,
Oh
Cobra Make, Engine: Unique 427 roadster with 351C-4B
Posts: 5,129
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Not Ranked
You mean there is air in them????? 
Rick |
03-25-2003, 12:05 PM
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CC Member
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Join Date: Nov 2002
Location: Burns,
TN
Cobra Make, Engine: used to have a spf
Posts: 112
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Not Ranked
Ham Todd:
30f/35r psi? How do you keep the tires from spinning? I run 22 psi all around.
John
spf1421
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03-25-2003, 12:07 PM
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Average Guy
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Join Date: Sep 2002
Location: Rushville,
IN
Cobra Make, Engine: red Shell Valley, white stripes
Posts: 579
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Not Ranked
I run 24-28 pounds, but I'm afraid to go any lower.
__________________
When I said I wanted to be somebody, I probably should have been more specific...
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03-25-2003, 04:36 PM
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GEAR GRINDER CUM LAUDE
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Join Date: Apr 2002
Location: Murray,
KY
Cobra Make, Engine: SPF #1560 w/ Ford Racing [RDI/AFR/RPM] Alum. 427CI - 575HP & TKO
Posts: 855
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Not Ranked
I'm running 295/50/15 in the rear with 24# in them. and 255/50/15 in the front with 22#. (Cold pressure) Great traction and driveability. At 24# all around, the front end was alittle loose. Dropping pressure in the fronts made a big differnce when accelerating. Not enough miles to tell about tire wear.
TL 
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BOYZ and TOYZ
With every day I grow alittle older -
BUT, I'LL NEVER GROW UP!
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03-25-2003, 04:49 PM
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Senior Club Cobra Member
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Join Date: Mar 2001
Location: Southern Connecticut,
CT
Cobra Make, Engine: SPF - 351W, 944 non-turbo
Posts: 2,105
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Not Ranked
It seems air pressure is like oil viscosities, most feel higher is better. Too much air reduces your footprint (and traction) and increases the spring rate of the tire. These are light cars on big tires. I run 20psi (cold) all around in my SPF with no problems (245/60-15 front, 275/60-15 rear). I would increase the pressure for track events but not for long trips.
Bob |
03-25-2003, 05:20 PM
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CC Member
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Join Date: May 2002
Cobra Make, Engine: B&B 186 351w
Posts: 40
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Not Ranked
I agree with Jhein. I run 23lbs all around in my B&B with a 351w & Live Axle. Tires stick to road much better and the ride is much smoother at a lower pressure, especially with a live axle. -David
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Email: dqualls@qwest.net
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03-25-2003, 05:41 PM
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CC Member
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Join Date: Oct 2002
Location: Jacksonville, FL,
Posts: 47
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Not Ranked
My Snake gets too "twitchy" when making hard turns right and left if I lower the air pressure. Maybe the sidewalls are more flexible?
__________________
Ham Todd
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03-25-2003, 08:13 PM
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CC Member
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Join Date: Feb 1999
Location: Kansas City,
MO
Cobra Make, Engine: CRL, 351W, Tremec TKO
Posts: 2,299
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Not Ranked
Hmmm... this is interesting. I was running 20 lbs front and back in my tires (295/50-15 rear, 255/60-15 front) and the car seemed not to track well (loose). Been running 30 lbs front and back and the car tightened right up, much better handling, turns in a lot quicker.
__________________
Pete K.
Who is John Galt?
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03-26-2003, 05:24 PM
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CC Member
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Join Date: Oct 2002
Location: Jacksonville, FL,
Posts: 47
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Not Ranked
Pete, me thinks you discovered the same thing that I did. Low pressure in my tires didn't help in tracking through turns!!
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Ham Todd
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03-26-2003, 05:58 PM
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CC Member
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Join Date: May 2002
Cobra Make, Engine: B&B 186 351w
Posts: 40
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Not Ranked
Just to clarify, lower pressure certainly gives me a more comfortable ride when cruising around town and my rear tires stick better in a straight shot drag situation. When talking about handeling abilities, I agree with Ham Todd and Petek that higher pressure is certainly the way to go. I used to SCCA Autocross in a heavy Mustang with my tires filled up to over 40lbs. I think it is best to adjust your tire pressure to the situation. I hope this helps.
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Email: dqualls@qwest.net
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