what bottle pressure, fuel pressure, ext..

is it safe to use the nitrous from a lauch. i have heard that you shouldnt use it before 3000 RPM. have you heard the same?

if you have a microswitch mounted to the carb how do you stop if from activating at launch (if the 3000 rpm theory is correct)

any tips from experience?

 

You really need to learn about NOS before you use it. It is not free HP. If you call NOS they wil answer all your questions.

For the questions you asked, bottle pressure needs to be between 900-950 psi. Fuel pressure depends on the tune, generaly between 5.5 and 7 lbs flowing pressure. Do not use it below 3000 rpms. As for the launch it depends on your set up etc.

NOS is great for street motors, but respect it and learn about it before you use it.

I run 100-200 shot through a Sportsman Fogger on a 454

 

not really sure.. however i wanna see you blow the welds on your intake and your floorboard fall off at the track on friday :jester

 

Nitrous is a cheap power adder that if done correctly will never give you a problem.

Putting a full throttle microswitch on the carb/throttle body is the number one best thing you can do, but you'll also want to incorperate a switch inside on the shifter or steering wheel which is in series with the throttle switch. That way it will only work if both buttons are closed. THis way you can pick the rpm and/or gear in which the nitrous is active.

A purge valve for the nitrous is a good thing to have, especially if the nitrous bottle is in the trunk or you have a really long supply line.

Pay attention to your fuel supply (that is if you are running a wet system), make sure the fuel pump can keep up with the carb/fuel injectors and the nitrous system. If not upgrage or run a seperate fuel supply line for the nitrous. If your running a dry system, you will need to run the carb extra rich. Ussually you will richen up the secondary circuit to acheive the proper air fuel ratio when the nitrous is on. Only draw back is that this extra rich fuel mixture will always be there which makes the wet system more desireable for a carb'd car.

Ignition timing, you'll want to pull timing out of the car when the nitrous is on, usually 2 to 4 degrees from the initial timing. Gap the spark plugs small or you could blow out the spark, definitelly think about upgradeing to a MSD or similar ignition system as well.

As for when should you operate the system. Yeah a good rule of thumb is over 2500 to 3000 rpms. Below that without a nitrous cam you could run the risk of blowing the intake through the hood. Also you don't want to do a burnout with the system on. I know a guy with a mustang that is wishing he would have payed attention to this right now. It literally blew the intake from the engine and pushed the fenders on both sides out 3 inched from the doors.

Definitely call NOS or Nitrous Works, or whoever's system you decide to go with and ask them their recomendations for setup with your combination. They most likely have tested a similar combo or can tell you what the system will do with what you have.

Be safe, be smart and all will go well with the nitrous.