S2K on NOS
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Joined: Sep 2003
Posts: 932
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From: Los Angeles
My mechanic friend recommended a 3 stage nos kit where unde WOT, first shot gives like 20-50 hp and after certain rpm the secodn shot kicks in with more hp and ofcorse the third one goes the same way around 7900 rpm with like much more than 100 hp.
I am not very well informed about this iuts just somebodys idea.
I am not very well informed about this iuts just somebodys idea.
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Joined: May 2002
Posts: 1,739
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I am spraying. Nx express kit wet shark nozzel 75 h.p. There a million things ya have to do. spark plugs,Fuel cut off switch, rpm switch, ya need a bottle pressure guage. Ya need a bottle warmer. Spraying for more than 8 seconds in a 11 to 1 engine is deadly. I highly advise ya mix the nitrous with the fuel before entering the piston chamber. In other words dry shots are risky....easy to pool. If ya pool with a wet sytem at least you have extra fuel in in the mix. Some say bigger fuel pump but I don't have one. Pick and choose the gear ya spray in. Spraying 1st thru 4th gear really heats them plugs up.
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Joined: Nov 2002
Posts: 1,241
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From: NYC
okay, there is indeed a good amount of work that is needed in order for the system to work effectively and safely. I have sprayed various car before and have done a lot of research on the S and I will be finishing up my project in two weeks ( custom direct port with 1XX shots). Here are some of my findings:
1. Change your plugs to a colder plug gapped about 30 to 35 thousands. I am using Denso iridium IK24 gapped at 30. Some have also used Champion race plugs which have performed very well even past 100 shots.
2. If you are going past 75 shots, then purchase a fuel pump from Walbro (255lph). The stock unit will run dry at about 310rwhp, contrary to what some experts say. However, for 160 dollars play it safe that sorry.
3. Use a wet setup rather than a dry setup because you want to add fuel to prevent detonation. While running 75 shot, try to use a higher octane. 91 and over. If you are spraying 100 shots then you need to use 104 octant or 100 octane mixed with octane booster contain nitro methane.
4. delivery of the system is always important. Try using a progressive timer like the NOS maximizer to delivery the amount of nitros either timed or rpm. Using the WOT switch will just deliver too much nitrous which would most likely break traction unless you are on slicks.
5. use a window swith from MSD and relay that between the WOT switch and solenoids. In this way you control the rpm range. i.e. On my setup I have the nitrous start at 4800rpm and shut down at 8800 rpm. Since fuel cutoff runs at 9100 rpm, it will be safe to deactive the nitrous in the event I take it up that high accidentally.
6. use an A/F guage to monitor your car to prevent the system from running lean and detonating. The best setup would be a wideband to have an accurate reading
7. use a fuel pressure guage to monitor the fuel flow. Some systems use a fuel cutoff switch like NX to prevent any serious disasters.
8. bottle heaters are often used to keep the pressure up to max 900 to 1000 so the flow is hard and direct, while a purge system will purge any warm or tepid nitrous out so the charge is at its coldest.
9. If you are spraying over 75 shots, then back out timing by 5 degrees and back in one by one until you reach very little detonation. I believe you should be at 3 degrees about 75 shots. I am using an emange computer to do this.
a few important items are never leave your bottle open when the car is off, use the right octane and start of slowly.
1. Change your plugs to a colder plug gapped about 30 to 35 thousands. I am using Denso iridium IK24 gapped at 30. Some have also used Champion race plugs which have performed very well even past 100 shots.
2. If you are going past 75 shots, then purchase a fuel pump from Walbro (255lph). The stock unit will run dry at about 310rwhp, contrary to what some experts say. However, for 160 dollars play it safe that sorry.
3. Use a wet setup rather than a dry setup because you want to add fuel to prevent detonation. While running 75 shot, try to use a higher octane. 91 and over. If you are spraying 100 shots then you need to use 104 octant or 100 octane mixed with octane booster contain nitro methane.
4. delivery of the system is always important. Try using a progressive timer like the NOS maximizer to delivery the amount of nitros either timed or rpm. Using the WOT switch will just deliver too much nitrous which would most likely break traction unless you are on slicks.
5. use a window swith from MSD and relay that between the WOT switch and solenoids. In this way you control the rpm range. i.e. On my setup I have the nitrous start at 4800rpm and shut down at 8800 rpm. Since fuel cutoff runs at 9100 rpm, it will be safe to deactive the nitrous in the event I take it up that high accidentally.
6. use an A/F guage to monitor your car to prevent the system from running lean and detonating. The best setup would be a wideband to have an accurate reading
7. use a fuel pressure guage to monitor the fuel flow. Some systems use a fuel cutoff switch like NX to prevent any serious disasters.
8. bottle heaters are often used to keep the pressure up to max 900 to 1000 so the flow is hard and direct, while a purge system will purge any warm or tepid nitrous out so the charge is at its coldest.
9. If you are spraying over 75 shots, then back out timing by 5 degrees and back in one by one until you reach very little detonation. I believe you should be at 3 degrees about 75 shots. I am using an emange computer to do this.
a few important items are never leave your bottle open when the car is off, use the right octane and start of slowly.