Nos
 

Should i put a 50 shot of NOS or a 100 shot of NOS

go 75, just to be safe - because you haven't told us ANYTHING about your car!!!!

Oh, and if someone says "if you have to ask, don't do it" tell them where to go. Because how did they learn? Did they sudenly just know everything about N02 and engines? You occasionally have to spend a bit to learn