simply, the NITROGEN is the key to combustion.... without nitrogen, you would have an uncontrollable explosion... the motor would NEVER handle such a blast!!!! it's real elaborate and I haven't been in school in 20+years, so I cannot remember 99% of it... but... everyone thinks either its the nitrous, or the oxygen, or the timing, or the squish, or the octane , or the polish and port job, or the transfer port edgeor the piston skirt,,,,,etc,,,etc,,,etc,,, My point being, if you want to play with nitrous,,, don't spend your time with these WASTE OF MONEY KITS ON THE MARKET TODAY.... Without elaborating which kit is better and which one stinks,,,, Spend twenty dollars on the book (its probably only 5.00 ) and learn why nitrous does what it does and WHAT YOU'LL NEED to make the motor react the way you want it to,,, WITHOUT blowing it up or melting a piston..... I've went as far as teflon coated skirts and ceramic coated pistons, coated domes (high compression) and coated exhaust ports.... case porting and cylinder porting and polshing, adaptive strategy on the cdi box... coated pipes (custom made by mike Decker) (10,000 rpm).. and a zillion other goodies!!!!! I could have ran 8.50's ALL DAY if I didn't get into a pissing match with the NHRA!!!!!! BOTTOM LINE______________ THEY WON and I LOST!!!!!! There were a few other guys like Ed Ensor's builders that could DO THE SAME THING THAT I WAS DOING!!!!!! Nitrous racing on ASPHALT put a VERY BAD taste in my mouth.... I harbored a LOT OF RESENTMENTS for a LONG TIME!!!!!! I've moved on, and the sport lost a very valuable individual... ME!!!!! I was up and coming when NHRA stuck it to meg!!!!! She and I had some conversations YEARS BACK!!!!! She must have gotten paid REAL WELL ( I know she did!!!) Because she still to this day, won't talk about it!!!!! YES, there is something inside me that STILL WANTS TO PLAY,,, But,,,I've BURNT TOO MANY BRIDGES TO COME BACK NOW!!!!!! Kinda makes me sad,,,Gary Oles nosboy