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Old 08-02-2013, 07:03 PM   #1
Arodr395
 
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Putting 305/35ZR20 on the rear of an 1LE.

Would putting 305/35ZR20 tires on the rear of an 1LE improve the times at the drag strip? Would it make no difference? Or would it actually just slow the car down? Keep in mind that I do realize this is a track car and was not meant to perform at the drag strip.
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Old 08-02-2013, 07:22 PM   #2
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To answer the same question you already posted in a thread:


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Originally Posted by Dropspeed View Post
Catch22....

If you need the added width it will aid in traction (faster)
The OD is slightly larger (I think it is 3/4" diff in height diff) so it will reduce your gearing (slower)
It will weigh slightly more (slower)

NOW, all of the above are really negligible....

-Matt
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Old 08-02-2013, 07:27 PM   #3
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Quote:
Originally Posted by Dropspeed View Post
To answer the same question you already posted in a thread:
I need a yes or no answer.
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Old 08-02-2013, 07:39 PM   #4
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Since another tire thread has been posted,has anyone put the Micelin's pilot sport tires on? if so i would like to see a pic.I just love the look of our F1 supercar tires,and cant imagine the Michelin's would look the same.
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Old 08-02-2013, 07:44 PM   #5
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Quote:
Originally Posted by cornerspeed92 View Post
Since another tire thread has been posted,has anyone put the Micelin's pilot sport tires on? if so i would like to see a pic.I just love the look of our F1 supercar tires,and cant imagine the Michelin's would look the same.
Would you please answer my question?
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Old 08-02-2013, 07:55 PM   #6
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I'd say do it!!! Slightly better traction since it's 9/10'' wider. They are a 1/2'' taller which helps fill the wheel well and also puts a slightly larger patch on the ground, again, traction. They look great on the car which out weighs the weight all day long in my opinion. Good luck!!
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Old 08-02-2013, 08:05 PM   #7
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Sorry, no PS's
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Old 08-02-2013, 08:38 PM   #8
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I'd say do it!!! Slightly better traction since it's 9/10'' wider. They are a 1/2'' taller which helps fill the wheel well and also puts a slightly larger patch on the ground, again, traction. They look great on the car which out weighs the weight all day long in my opinion. Good luck!!
I agree that they would look way better . I just have to make sure they don't actually make the car slower lol.
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Old 08-02-2013, 08:51 PM   #9
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Put them on & find out
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Old 08-02-2013, 08:51 PM   #10
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Quote:
Originally Posted by cornerspeed92 View Post
Since another tire thread has been posted,has anyone put the Micelin's pilot sport tires on? if so i would like to see a pic.I just love the look of our F1 supercar tires,and cant imagine the Michelin's would look the same.
Here is a pic with Michelin PSS
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Old 08-02-2013, 09:19 PM   #11
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Put them on & find out
I can't justify investing in new rear tires without knowing if they would or would not increase my performance on the 1/4 mile.
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Old 08-02-2013, 09:44 PM   #12
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If all your going for is a better 1/4 time just get drag radials that would be the smart decision. But those tires would look good, and I like to see a pic.
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Old 08-02-2013, 09:48 PM   #13
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Quote:
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If all your going for is a better 1/4 time just get drag radials that would be the smart decision. But those tires would look good, and I like to see a pic.
I want the look that the 305/35ZR20 tires give but I also want to know if it would give me faster 1/4 mile times.
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Old 08-03-2013, 12:26 AM   #14
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Will it throw off the speedometer?
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Old 08-03-2013, 12:39 AM   #15
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Will it throw off the speedometer?
Yes by 5 or 6 MPH's.
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Old 08-03-2013, 12:47 AM   #16
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Yes by 5 or 6 MPH's.
That seems like a lot.
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Old 08-03-2013, 12:52 AM   #17
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Quote:
Originally Posted by 2013 1LE View Post
That seems like a lot.
That's what I was told by the people that work at the service department.
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Old 08-03-2013, 01:03 AM   #18
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At 60 the difference from 285/35 to 305/35 is about 1 mph faster with the 305. Who ever told you 5-6 is crazy lol.

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Old 08-03-2013, 05:16 AM   #19
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Think the rubber compounds used in the tire and tread pattern have a lot to do with traction as well. After my build I had 305/35/20 P-Zero Ferrari and while it handle nice the traction was horrible, like grease pigs. I changed out to Nitto Invo's 315/35/20 and the difference in traction was night and day. The car has been lower 1.25" on all 4 corners and the tires fit without any issues although my rear rims are 11" wide.
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Old 08-03-2013, 05:38 AM   #20
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Quote:
Originally Posted by Arodr395 View Post
I need a yes or no answer.
This is not a simple yes/no for a forum as I assure you know one here has done a back to back test with the exact same conditions.

Their are two many other variable that can affect your 1/4 mile time before the 285 or 305 would increase ot decrease your 1/4 time because of their negligible differences in size, weight and overall diameter. Everything from weather, surface prep, fuel volume, shift points etc can change the E/T.

For example. 15 gallons of gas weighs in the neighborhood (depending on ethanol content) 91lbs. 4 gallons, about 24 lbs. The 76lbs will make the car car slower, but wait a minute.....that is more weight over the rear wheels to aid in traction. The 76 lbs may help if the track surface is not prepped

Example 2. If you put two drivers in a the same car and one has 285 and the other has 305. The better driver will win a drag race everytime.

Bottom line. If you like the looks of the 305 and the coin to spend I would do it. But I would also spend more time learning to drive the car instead of worrying about the diff in tire size as seat time will far outweigh any 285/305 changes.

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Old 08-03-2013, 08:10 AM   #21
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if you road course it you can say hello to the problem the regular SS cars have....understeer
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Old 08-03-2013, 12:26 PM   #22
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Quote:
Originally Posted by Bauer2 View Post
At 60 the difference from 285/35 to 305/35 is about 1 mph faster with the 305. Who ever told you 5-6 is crazy lol.

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Wouldn't it show a slower mph on the gauge due to the fact of less revolutions?

Also wouldn't the taller tire effect gearing negatively for the 1/4 mile.
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Old 08-03-2013, 01:53 PM   #23
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Quote:
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Wouldn't it show a slower mph on the gauge due to the fact of less revolutions?

Also wouldn't the taller tire effect gearing negatively for the 1/4 mile.
Yes to both.
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Old 08-03-2013, 02:53 PM   #24
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Yes the gauge would be slower so when it reads 60 your actually doing a little over 61. Guess I didn't explain it that well sorry.

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Old 08-03-2013, 03:34 PM   #25
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Quote:
Originally Posted by Dropspeed View Post
Yes to both.
How would it effect gearing negatively in the 1/4 mile?
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