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Author Topic: Need some help on vehicle setting info  (Read 3106 times)
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85PERCENT
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« on: September 04, 2011, 07:27:19 pm »

If someone can help me calculate some settings for my vehicle I would really appreciate it Wink

I have a 2011 chevrolet camaro LLT 3.6L V6. curb weight is 3741, drag corfficient is .36, frontal area is 25. The final gear ratio is 3.27, and my tire size is 275-40-20.

I need to know what is my,

Tire circumference
Tire rolling resistance coefficient
Vehicle speed correction factor

Also, what are you guys asking for tire specification? my tire size? Huh

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85PERCENT
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« Reply #1 on: September 17, 2011, 04:20:50 pm »

No help Huh not even from palmer performance?
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boosted4dr
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« Reply #2 on: September 18, 2011, 12:36:13 pm »



Tire circumference





circumference/diameter=pie

Thus

diameterXpie=Circumference

Diameter of your tires typically are available on Tirerack. 275/40r20 seems 29" for most

so..

29"x3.14=91.06"

So your tires have a 91.06" circumference
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85PERCENT
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« Reply #3 on: September 18, 2011, 05:29:59 pm »

Thank you boosted4dr Wink I thought by tire circumference it was asking the overall height of the tire which is about 28" I didn't know we had to calculate the pie.

Now if somebody can help me with the tire rolling resistance coefficient and vehicle speed correction factor I be good to go.
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cyclehead
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« Reply #4 on: September 23, 2011, 01:49:39 pm »

Do tire rack numbers allow for weight of the car squishing the radius?   Or would I get more accurate numbers with a piece of string wrapped around a tire, with a car sitting on it?
(pie is for dessert - pi is for mathematicians)
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