Alright.. so some of you guys know that ive got some experience with Nitrous Oxide and EFI (approximately 6-7 years). On the flip side... i have nearly NONE with carbs. Ive seen a few... just a few cars with a healthy amount of Nitrous, and a carb... with a 5 speed backfire between shifts through the exhaust. My question is simple.. is something like that common with carbs, Nitrous and manual transmissions? Its never happened to me with EFI and Nitrous at all... so im just curious.