Newbie to NOS
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Supreme Member

Joined: Oct 1999
Posts: 2,977
Likes: 1
From: Davison / Troy ,Michigan
Car: 1991 Pontiac Firebird
Engine: 3.8
Transmission: 700r4
Axle/Gears: Dana 60
Newbie to NOS
I am no newbie to engines, mods or how they work so u don't have to explain every detail but I have never worked with NOS before so I thought I would come to u guys to help me out. I just bought a 120hp shot NOS kit w/ purge valve, blown down tube, bottle blanket, bottle heater and basically everything I need and some extras as u can see. Now I do not have any forged internals but my throttle body is modified with tb spacer, matching injectors, injector spacer, dremeled out the restrictive stuff, 14x3 open element,drop base and an adjustable fuel pressure regulator. My ignition upgrades include MSD Cap/Rotor, MSD Blaster Coil, MSD 8.5mm Superconductor wires and .045 gapped Rapidfire plugs.
I know timing and fuel pressure is a big issue in keeping your internals from going and thats what I wanted to ask u guys. What are some extras and tips,besides getting forged internals, that would keep my 120 shot from blowing the engine. Like spark plugs to run, what else to get that would be good insurance like a MSD Timing Control Box and how it works, etc...
I know that if u run it right u can do the shot I am doing, and the guy before had it on his car and used it to drag race and he had no internal work done on his engine and he ran a 13.18 in the 1/4 mile + slicks.
Anyways, so can ya help a NOS newbie out?
I know timing and fuel pressure is a big issue in keeping your internals from going and thats what I wanted to ask u guys. What are some extras and tips,besides getting forged internals, that would keep my 120 shot from blowing the engine. Like spark plugs to run, what else to get that would be good insurance like a MSD Timing Control Box and how it works, etc...
I know that if u run it right u can do the shot I am doing, and the guy before had it on his car and used it to drag race and he had no internal work done on his engine and he ran a 13.18 in the 1/4 mile + slicks.
Anyways, so can ya help a NOS newbie out?
Thread Starter
Supreme Member

Joined: Oct 1999
Posts: 2,977
Likes: 1
From: Davison / Troy ,Michigan
Car: 1991 Pontiac Firebird
Engine: 3.8
Transmission: 700r4
Axle/Gears: Dana 60
I just realized I am was calling N20, NOS. LoL, sorry guys, its been a long morning already here at work, but u guys know what I mean.
First, congrats on the nos purchase...
since this is your first time using it, i suggest having it professionally installed if you've never done anything like this before.
Dont run a platinum tipped spark plug with nos, your instruction book even tells you to change em out. A copper tipped plug works just fine.
Start with a small jet. Dont try to run your 125 shot first, jet with a 75 shot, test, and slowly increase from there.
if you want some good advice on safety devices, things such as a fuel pressure switch will shut off the NOS if your fuel pressure drops, so you dont run lean. Run a RPM window timer to control activation of your nitrous from a company like MSD, NOS, etc. Have it activate at 3,000 rpm's and shut down around 5800. Do not activate your NOS below 3k RPMs.
Get yourself an Air/Fuel gauge so you can watch your mixture as you're running. If you lean up, shut the kit down.
As long as you have the kit properly installed by someone who knows what they are doing, and take all their advice on the use of it, you will not need forged pistons, etc. It can be used safely on a rather stock engine.
tune your nos kit, as i said earlier, by running a small shot first, and working your way up.
And remember, just because it worked on the Fast and the Furious, doesnt mean it works the same way in real life.
since this is your first time using it, i suggest having it professionally installed if you've never done anything like this before.
Dont run a platinum tipped spark plug with nos, your instruction book even tells you to change em out. A copper tipped plug works just fine.
Start with a small jet. Dont try to run your 125 shot first, jet with a 75 shot, test, and slowly increase from there.
if you want some good advice on safety devices, things such as a fuel pressure switch will shut off the NOS if your fuel pressure drops, so you dont run lean. Run a RPM window timer to control activation of your nitrous from a company like MSD, NOS, etc. Have it activate at 3,000 rpm's and shut down around 5800. Do not activate your NOS below 3k RPMs.
Get yourself an Air/Fuel gauge so you can watch your mixture as you're running. If you lean up, shut the kit down.
As long as you have the kit properly installed by someone who knows what they are doing, and take all their advice on the use of it, you will not need forged pistons, etc. It can be used safely on a rather stock engine.
tune your nos kit, as i said earlier, by running a small shot first, and working your way up.
And remember, just because it worked on the Fast and the Furious, doesnt mean it works the same way in real life.
Thread Starter
Supreme Member

Joined: Oct 1999
Posts: 2,977
Likes: 1
From: Davison / Troy ,Michigan
Car: 1991 Pontiac Firebird
Engine: 3.8
Transmission: 700r4
Axle/Gears: Dana 60
And remember, just because it worked on the Fast and the Furious, doesnt mean it works the same way in real life
I will do what ya said. Buy a fuel/air ratio guage and take everything to a pro. Anymore advice would be helpful.
Thread Starter
Supreme Member

Joined: Oct 1999
Posts: 2,977
Likes: 1
From: Davison / Troy ,Michigan
Car: 1991 Pontiac Firebird
Engine: 3.8
Transmission: 700r4
Axle/Gears: Dana 60
Yeah and I am buying the MSD External HEI Adjustable Timing Control device from the same guy for 75 bucks shipped.
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Joined: Jun 2001
Posts: 1,668
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From: Dale City, VA
Car: 91 GTA and 85 IROC
Engine: 355
Transmission: gear jammer
Axle/Gears: 4.11
I wouldn't pay anyone to install N20. I've never done it untill I intalled mine. It was time consuming but very easy. If you have all your instructions you should be able to do it. Took me 2 days, one for the hardware and one for the electronics. This includes a bottle heater, fuel pressure sfety switch, and purge. Its not hard, just take your time and try to figure out where you want everything to run(wireing, N20 line), this will make it go a lot faster. Good luck!
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Thread Starter
Supreme Member

Joined: Oct 1999
Posts: 2,977
Likes: 1
From: Davison / Troy ,Michigan
Car: 1991 Pontiac Firebird
Engine: 3.8
Transmission: 700r4
Axle/Gears: Dana 60
I got it from a friend actually. So it is used but the part number for it is
#NOS-05153
I know it says 100-150 but I guess my friend bought the 75-125hp jets instead. :rockon:
#NOS-05153
I know it says 100-150 but I guess my friend bought the 75-125hp jets instead. :rockon:
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