Well not using N20 is a personal choice, nobody in my family has used it and there have been some fast cars and still are some fast ones. Ive toyed with the thought of it but ill just build some fire breathing monster and try to tear up my buddies aluminum headed small block chevy on a 150 shot....ill just set up the suspension and everything since he is on stock suspension and a stock convertor....ill just have to beat him at the line and not look back