how much would it be safe to go at stock fuel pressure (~45psi) w/o getting something to up fuel rail pressure like the NOS 5176 kit 75hp,100hp? It's a 93 so 22lb injectors.
Thanks,
Michael

 

0 !!! there is no power in nitrous itself (except for the cooling effect) all the power add is in the fuel

mike

 

Unless you shot in front of the MAF don't do it. Even when placing the nozzle in front of the MAF I wouldn't go more than 50 without any other controls.

 

93s are speed density, so he shouldnt be shooting a dry kit at all without bumping up the fuel pressure. (Now with DFI and larger injectors it's possible, but I take it that we are talking about a near stock car, since he's still running 22 # injectors)

 

as said aboe,NOT raising pressure would be costly.
why dont you want to raise the pressure?

 

Oops didn't notice it was a '93

 

Absolutely INCORRECT! True, some of the power in nitrous is the cooling effect. BUT, the real HP is from the additional oxygen injected into the engine contained in the n2O ! The additional fuel supports the additional oxygen. An
automechanic should really know that. Especially, if he is juicing the rides he has in his signature.

 

The point he was trying to make -and the correct one - is that you have to add extra fuel to go with the extra O2, or you don't make any extra power. The heat comes form the exothermal combining of the O2 with the hydrogen and carbon in the fuel. You are just splitting hairs with this response.

 

Exactly. MAny have had success running a dry 100shot without raising the FP changing anything else in the fuel system. And others have blown them up. But for the extra cash I would upgrade the fuel system so you can even run higher than 100shot Just use a 75shot until you upgrade elsewhere then move up.

 

I have 30 pound injectors and upgraded racetronix fuel pump, would it be safe to run a dry kit with out the thing that raises the fuel pressure?

 

Hold on a second here guys. If you add nitrous without adding fuel (in some way) your motor will run leaner. This can be a recipe for disaster, especially when running nitrous. What's more, generally speaking, adding nitrous without adding fuel will not produce more hp. While it's true that hp is limited by airflow, air does not make power, fuel does.

Now, the stock calibration on an LT1 is a bit rich. So, it may be possible to spray a small amount of nitrous without adding any more fuel. This will make hp, but only if the car was indeed too rich to start with. I wouldn't try this without verifying an initial rich condition. 50hp isn't worth risking your motor unless you are involved in big money racing!

Rich Krause