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Roasting tires

1.8K views 15 replies 13 participants last post by  RImoparMan  
#1 ·
I live in South Carolina I bought my charger RT when it was dead summer. I felt the car was a tad sluggish sometimes. I always complained about not being able to roast tires from a dig.

Man as soon as the weather cooled off holy crap this car is a completely different beast. About half throttle from a dig I was able to roast them!! Man it felt awesome. The cooler weather acts like a super charger.
 
#6 ·
Our cars work via a Manifold Absolute Pressure (MAP) sensor, which basically measures the density of the air. So, knowing that cold or dry air is much denser than warm or moist air, it helps us enjoy improved performance during the fall -winter-spring. Performance is noticeably worse during hot humid summer weather.

Most other car makers use MAF sensors (air flow over a hot wire) so they don't see as big a decline in the summer. So...don't race a Mustang unless the weather is COLD!
 
#8 · (Edited)
The ideal combination for good engine performance is high pressure, low temperature, and zero water-vapor pressure.

http://www.hotrod.com/articles/ccrp-0606-altitude-density-tuning/

Here's a engine tuner's calculator you can use to see the effects of elevation, temp, and relative humidity on HP.

https://wahiduddin.net/calc/calc_hp.htm


If you look at the side-bar of the calculator you will see engine tuning using absolute pressure. Click these calculators for using absolute pressure with air temp and either dew point or relative humidity.
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#13 ·
I used to be able to roast mine until I slapped the pireli pzero all season plus on there. those tires are sticky as shit. I have to have perfect conditions to spin those free. Now that I have a trinity, I'm gonna change my differential gearing to be able to roast them.