How important is humidity.

[Komet99]

Higher pressure = more oxygen molecules
Lower humidity = more oxygen molecules
combine the 2 and that what the water grain that racers discuss. I dont know about a majic number to start with, but if water grains change 10%, the jet must be changed 10 percent.

 

[flattop1]

http://www.wallaceracing.com/grains-water.php
google brought this up as i was looking for a mathmatical calculation for figuring water grains . simple but not what i was after .
so do you add them up and divide by 2 ?

 

[Jim46]

How about this one . Back in the day I knew a guy that ran Late Models . He told me he mixed 10- 20 % water in the Methonal .

 

[XXX#40]

How about this one . Back in the day I knew a guy that ran Late Models . He told me he mixed 10- 20 % water in the Methonal .

That must of been a very long time ago, we have ran Super Lates for years and they run racing fuel.