what is the best RPM to use NOS at?

 

NAWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWS

 

anywhere after 3000 and WOT on 1, 2,3, and 4th but not too long..
dont spray over 4 seconds at a time on 5th..... theres such a big load on 5th gear tgat will cause the combustion temperatures inside ur cylinder to cause some trouble/

beleive me..... my cousing bent and melted valves for overspraying 4th and 5th on a civic

and my buddy last mth blew a cavy when he got pist at his gf by spraying on 5th for like 20 seconds

 

20 seconds is outrageous, but in a 1/4 mile pass it is okay, just dont spray till max MPH on the highway

 

best rpm to spray is right after you actually get some decent traction, which varies...