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Author Topic: Tires  (Read 820 times)

rjstat

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Tires
« on: April 06, 2007, 03:40:00 PM »
OK I need to get new rubber for the new 17" chrome bullet wheels what width and profile as well as Manufacture do like. Also would I have problems with using 16" racing slicks at the track  
97 - 4.6L Alpine Green Cougar XR-7 w/ Fiber Concepts Hood, SPC cold air intake, 2.5 SLP Dual Exhaust, Eclipse CD4000 w/ Polk's speakers, Koni Shocks, 11/4" Addco sway bars, and Vogtland more to come.
08 Volvo XC90 loaded.

J dot Miller

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Re: Tires
« Reply #1 on: April 06, 2007, 10:01:49 PM »
How wide are the 17's??   ???
The 5.4 swap has been called a bad idea, and considered an underpowered considerable waste of time, since 2007.

Nice to see that most donít think that anymore.
Bondfreak13 07/28/09 09:05 PM

rjstat

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Re: Tires
« Reply #2 on: April 07, 2007, 05:48:13 AM »
How wide are the 17's??   ???
The wheels are 17x9 what manufacture, width, profile and type of tire.
97 - 4.6L Alpine Green Cougar XR-7 w/ Fiber Concepts Hood, SPC cold air intake, 2.5 SLP Dual Exhaust, Eclipse CD4000 w/ Polk's speakers, Koni Shocks, 11/4" Addco sway bars, and Vogtland more to come.
08 Volvo XC90 loaded.

Jake

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Re: Tires
« Reply #3 on: April 07, 2007, 09:46:17 PM »
You need to spec the tires out so they will have the same or close over all dia to a 225/70/15 , or a 235/60/16, as they will be about close enough to allow you to use the output gear to the speedo without too much error. (this can be a contributory factor to confuseing the computer, and also lead to some tickets) Get a tire catalogue , and  if dia isnt given, use the revolutions per mile as a guide . wish I could give you a good example, but i have tossed all my tire reference guides. try not to get too much out of that range, and also look for a "H" rating, as the W,V,Z rated tires get really crappy wear, and are richeously expensive...........Good luck> ;)
'95 T-Bird 5.4L blower and sum stuff
13.6sec 1/4 mi, 300RW at 5250 RPM
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http://www.soulcast.com/user/posts/70579       note; this is a new blogsite

J dot Miller

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Re: Tires
« Reply #4 on: April 08, 2007, 10:02:21 AM »
The front tires can not be too fat and are limited by the wheel well.  I keep the width in the front to 225 -245.  The rear tires can be as wide as 255!

Smaller is better for the front.  I looked at several tires and you will be limited in the front by your rim width of 9".  This will force you to have a wider tire in the front than stock.  I do not believe that a 225 will fit on a 9" rim.   You need at least 235 wide!

To check the tire size go to:   http://www.sccoa.com/faq/tirecalc.php

You will need to do something like this.  Here are some front rim choices vs 1995 15" Cougar stock rims:
220/55/17 -.32
225/55/17 -.11
230/55/17 +.11
235/55/17 +.33
240/50/17 -.4
245/50/17 -.2
250/50/17 -.01
255/50/17 +.19

The number above is the difference from stock from my old car.  You should do the same for your tires.

I recommend selecting a pair where the rears were slightly higher or equal to the front tire height. 

The 5.4 swap has been called a bad idea, and considered an underpowered considerable waste of time, since 2007.

Nice to see that most donít think that anymore.
Bondfreak13 07/28/09 09:05 PM