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I use the TNT kit. When I had the 75 jets in I got roughly an extra 70-75 at the wheels and extra 100 ft-lbs of torque at the wheels. Mine was not at peak, though, and the maximum increase was at around 3500 rpm. At peak the numbers were not as high. I now have the 100hp jets in and it hits substantially harder than the 75 jets. I think the 75 jets are for those starting out and getting used to it and the 100 jets, at least for TNT, are enough most vette owners,... and not overkill on the engines, either. I can't wait to dyno these 100 jets. Airwolf (or whomever stated it) was right in that bottle pressure is critical. At 750psi the hit is like a fart, but at 1000psi or so, the hit is mean. TNT says that the C5 should dyno at +106hp and +200-250 ft-lbs of torque at the wheels on the 100 shot. Many have dyno-proven this and I plan to in a week or so. I think the dual-nozzle power ring on the throttle body have something to do with it.
From: ********************* Florida's Space Coast *********************
Re: tnt vs nx (MC TORCH RED)
I personally don't see how someone could NOT have a heater and pressure gauge(visible from the driver seat) and feel safe running nitrous.
If your pressure is higher then 1150PSI the chances of running lean is greatly increased (very bad); and with the pressure low you are not gaining the full benefits of nitrous. Here in Florida, I use the heater more then you would imagine. After a 1/4 mile run, the pressure is usually down 75 to 100 PSI at the end of a run, and at night the sun is not there to help you "warm" back up. I my opinion a heater is the most important add-on, followed closely by the compartment gauge. Unfortunately, an electric nitrous pressure gauge is $200+, but then again what is your peace of mind worth?