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water grains | Yellow Bullet Forums
https://www.yellowbullet.com/threads/water-grains.500189/
"Anything below 50 grains is considered dry," Walsh says. "Anything above that is wet, and anything above 100 is really bad. The worst I've ever seen was in Memphis a few years ago, when that race was in August: 130 grains. The cars don't want to run at all when there's that much water in the air.
Calculate Grains of Water and HP Correction- Wallace Racing
http://www.wallaceracing.com/grains-water.php
This calculator uses the Motorsports Standard Atmosphere (MSA). (Not ISA - International Standard Atmosphere) Grains - Grains of water vapor per pound of dry air. The HP Correction is a better determination of ET than the DA (Density Altitude). I …
HUMIDITY CAN BE THE DEVIL FOR DRAG RACERS - Competition …
http://www.competitionplus.com/drag-racing/news/15585-humidity-can-be-the-devil-for-drag-racers
Racers measure how severe the humidity is by the water grains. The level of water grains is calculated from temperature and relative humidity. “Anytime the humidity gets in the 110 grains, it is hard to overcome,” confirmed Okuhara. Friday was on the verge of being really bad conditions for the tuners to overcome. The water grains were at 109 with an air temperature of …
water grans | InsideTopAlcohol
http://www.insidetopalcohol.com/threads/water-grans.38710/
I have seen a water grains change equivalent to a half inch of mercury on the air pressure scale. That is significant. On page 117 of our book, 5000 Horsepower On Methanol, an example of 107 grains of water is illustrated for a typical race engine. It is over one pint of water per minute going through the engine example. Bob Szabo [email protected]
Biondo Racing - Racing Tips and FAQ - Drag Racing …
https://www.biondoracing.com/tips.shtml
Water Grains-If you see water grains go up at the same time humidity goes up, you are generally going to see a significantly more slow down than if humidity goes up and water grains stays the same. The same is true when humidity and …
Density Altitude, Air Density, Water Grains Tuning
https://racecarbook.com/freebies/density-altitude/
The site provides real-time, forecast, and historical weather variables including air density, density altitude, and grains of water. Currently the site features over 600 race tracks worldwide including dragstrips, circle tracks, nascar, and karting. If your track isn’t listed, contact us and we’ll add it.
Racing Fundamentals with Air Density Tuning
https://www.racingjunk.com/news/racing-fundamentals-with-air-density-tuning/
More vaporization = more power. The amount of humidity (often expressed as water grains) has an effect on vaporization. This vaporization depends on the temperature at the time as well as the barometric pressure. Some motorsports racing engines, such as popular bracket drag racing, are tuned to a targeted horsepower goal.
Atmospheric water vapor and horsepower - Air Density …
https://airdensityonline.com/2017/04/water-vapor-horsepower/
The best way to track water vapor is by following the grains of water on the tracks pages. The higher that number, the more water vapor is in the air. On our site, we list the air density with and without water vapor. The bigger the difference between those 2 numbers, the more water vapor is taking up space in the atmosphere.
Measuring the Atmosphere Around a Track - Air Density …
https://airdensityonline.com/2016/08/measuring-racetrack-atmosphere/
2021 NHRA Drag Racing Schedule . Categories. Events (5) Features (31) Info and Education (37) Main News (235) Site News (115) ... The measurement of grains of water is the amount of grains in a pound of air. While relative humidity and dew point are influenced by the temperature, grains of water is an absolute measurement of just the amount of ...
How to Tune Your Race Car for Weather Conditions
https://www.onallcylinders.com/2013/05/17/racing-with-mother-nature-how-to-tune-for-weather-conditions/
Increase the shift point by 100 rpm; if the car picks up, add another 100 rpm. The sky isn’t the limit here. Roughly 300 to 400 additional rpm is all most camshaft and valve springs will tolerate, but it should be enough to improve performance. This technique gets more complicated when you add more gears.
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