I'm looking into nitrous kits for my 4.6 I don't want any monter 100-150 shot probably aiming to use a 75 at the most. But I'd like some more info on the stuff. Such as how does it affect the motor overtime. Will I need any other upgrades to go with it such as injectors? What kit to use wet or dry? I was reading a write up on the modded mustangs forums I beleive and they mention something about uneven fuel distribution or w/e with the wet kits. Kinda lookin for someone that sprays alot. I was kinda leaning towards getting an sct tuner as well or should I take it to a dyno shop and have them tune it?
Some nitrous pros and cons?
- Thread starter MoneygrubbinCar
- Start date
First of all 75 is a small shot you barely would notice anything past the initial hit and you would want more anyway down road , we all been afraid to spray too much before so think ahead with your kit choice.
a small shot(75) wont require any modifications other than what the kits includes , leave the stock tune on(its actually recommended by most nitrous kit on small 50-75 shots) , get 1 range colder plug and spray your heart contents out
about the "uneven fuel distribution" issue , our intake doesn't flow fuel + nitrous mix well and some might puddle up in the intake causing a back fire + shattering the intake into a gazillion little pieces and giving your hood a nice 1-2 inch lift , i seen it happen twice on mustangs , but that was in shot exceeding 150+ , simply don't spray below 3k Rpm(notice how most people getting nitrous blowouts on youtube are spraying out of a dig) , get safety gadgets and you will be fine , only time i seen damage from nitrous is because people spraying too much with little precaustions simply greed.
i sprayed along time on my stang and the only reason i am not on the bottle anymore is because i was getting tired filling bottles
a small shot(75) wont require any modifications other than what the kits includes , leave the stock tune on(its actually recommended by most nitrous kit on small 50-75 shots) , get 1 range colder plug and spray your heart contents out
about the "uneven fuel distribution" issue , our intake doesn't flow fuel + nitrous mix well and some might puddle up in the intake causing a back fire + shattering the intake into a gazillion little pieces and giving your hood a nice 1-2 inch lift , i seen it happen twice on mustangs , but that was in shot exceeding 150+ , simply don't spray below 3k Rpm(notice how most people getting nitrous blowouts on youtube are spraying out of a dig) , get safety gadgets and you will be fine , only time i seen damage from nitrous is because people spraying too much with little precaustions simply greed.
i sprayed along time on my stang and the only reason i am not on the bottle anymore is because i was getting tired filling bottles
Tim2002GT
Founding Member
My $0.02, I would get a wet kit for simplicity. With a wet kit, you will not need to upgrade injectors. I always recommend upgrading fuel pumps no matter how big of a shot you are going to use. I use an SVT Focus pump and it works great. Like already stated, get yourself a set of spark plugs that are 1 step colder than stock. I use NGK TR6's and gap them to 0.035. You can spray up to a 100 shot using the stock tune, but anything above that and you really need to pull some timing out of it. Do not ever use the nitrous with a performance tune loaded. You will likely have some detonation which could cause some internal engine damage. As for uneven fuel distribution with a wet kit. With a relatively small shot, 100hp or less, that isn't going to be an issue. Just make sure your engine rpms are above 3k and don't spray it above 6k. Also, you will definately feel a difference with a 75 shot. If you can't, something is wrong with you or your setup.
Fwiw, I've been spraying 125hp through my motor for almost 3 years and it still runs strong.
Fwiw, I've been spraying 125hp through my motor for almost 3 years and it still runs strong.
Thanks for the awesome replies just the answers I was looking for. I was a little hesitant about going anything about 75, thanks tim for the enlightment of ur car handling it for 3 years. This is my dd and I kinda need it to hold up for me 
. As far as the WOT set ups what exactly do you set that with when you do say you want the spray to kick in at 3k and shut off at 6k. My only fear would be surpassing 6k with the nitrous still blasting due to a late or missed shift we're all human its bound to happen. Also suggest some kits I only know of a few such as Zex or NOS. What do most guys run? I also forgot one of the most important questions About how many runs can you get out of a bottle and the average cost of refilling.
PS Tim was also curious of how often you spray your car during that 3 years?
. As far as the WOT set ups what exactly do you set that with when you do say you want the spray to kick in at 3k and shut off at 6k. My only fear would be surpassing 6k with the nitrous still blasting due to a late or missed shift we're all human its bound to happen. Also suggest some kits I only know of a few such as Zex or NOS. What do most guys run? I also forgot one of the most important questions About how many runs can you get out of a bottle and the average cost of refilling.PS Tim was also curious of how often you spray your car during that 3 years?
Tim2002GT
Founding Member
I use an MSD digital rpm window switch. Got mine from SummitRacing.com a few years ago. I think I paid $110 or so. Here's a thread I made about installing it... http://www.stangnet.com/mustang-forums/755443-need-wiring-help-rpm-window-switch.html
I have been more than happy with my Harris Speedworks kit. I've never had any problems with it at all. They were originally pretty poplular with the GM guys, but lately more Mustang guys are starting to use their kits. Ryan, BurningRubber, is using their new plate kit. It looks like the way to go, has a real clean solenoid mounting bracket. Here's a link to his kit... Harris Speed Works*::*EFI Nitrous Kits*::*Ford Vehicles*::*Mustang*::*Mustang '99 - '04*::*HSW Wet Nitrous Kits*::*Sudden Impact Wet Plate Nitrous Kit and here is the kit I am using... Harris Speed Works*::*EFI Nitrous Kits*::*Ford Vehicles*::*Mustang*::*Mustang '99 - '04*::*HSW Wet Nitrous Kits*::*Sudden Impact Wet Nitrous Kit Nitrous Express would be another company I would recommend you use. They are probably the top of the line nitrous product selling company out there.
Typically, I pay either $3.25/3.50 per pound for nitrous in my area. With my 125 shot, I usually get about 4-5 real good passes, 1/4 mile passes, out of a full bottle. With a 75 shot, you could probably get about 10 full passes out of a bottle.
Last year and the year before, I was going to the track 2-3 times a month and running 4-5 times each time I was there. This year, I've been having tranny problems so I haven't been out there much. I've probably got over 100 passes on my car using the 125 shot jets. Thats not counting all the times I've just been out playing around spraying a 75/100 shot.
I have been more than happy with my Harris Speedworks kit. I've never had any problems with it at all. They were originally pretty poplular with the GM guys, but lately more Mustang guys are starting to use their kits. Ryan, BurningRubber, is using their new plate kit. It looks like the way to go, has a real clean solenoid mounting bracket. Here's a link to his kit... Harris Speed Works*::*EFI Nitrous Kits*::*Ford Vehicles*::*Mustang*::*Mustang '99 - '04*::*HSW Wet Nitrous Kits*::*Sudden Impact Wet Plate Nitrous Kit and here is the kit I am using... Harris Speed Works*::*EFI Nitrous Kits*::*Ford Vehicles*::*Mustang*::*Mustang '99 - '04*::*HSW Wet Nitrous Kits*::*Sudden Impact Wet Nitrous Kit Nitrous Express would be another company I would recommend you use. They are probably the top of the line nitrous product selling company out there.
Typically, I pay either $3.25/3.50 per pound for nitrous in my area. With my 125 shot, I usually get about 4-5 real good passes, 1/4 mile passes, out of a full bottle. With a 75 shot, you could probably get about 10 full passes out of a bottle.
Last year and the year before, I was going to the track 2-3 times a month and running 4-5 times each time I was there. This year, I've been having tranny problems so I haven't been out there much. I've probably got over 100 passes on my car using the 125 shot jets. Thats not counting all the times I've just been out playing around spraying a 75/100 shot.
BurningRubber
10 Year Member
- Dec 6, 2004
- 1,865
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Yep, I am REALLY happy with the Harris Speed Works plate kit.
I would go wet with our cars. With a dry kit, you're relying on the fuel injectors to supply the fuel and I don't trust that on stock injectors. Therefore, larger injectors and a fuel pump are almost a necessity to be safe, and that's more than I want to get into.
I started out on a 75 shot, went through 4/5ths of a bottle before I got bored with it. Put in the 100 shot and still can't wipe the smile off my face. Going 75 to 100 doesn't look like a big difference on paper, but there is a significant torque increase and it really wakes the car up. I've gone through about two bottles so far since the first spray.
With the 75 shot, you feel the initial hit, but it doesn't pull really hard. It's definitely faster, but once it hits it just kind of takes off.
With the 100 shot, not only is the hit harder than the 75, but the car feels like it just got kicked in the ass as it takes off down the road. I imagine Tim's 125 shot, and people that run a 150 shot have even more fun.
For what it's worth, I'm running a stock tune that is slightly modified via my Diablosport Predator. I have pulled a couple of degrees of timing, and added more WOT fuel. Never put it on the dyno to check the A/F ratio, which is a VERY good thing to do. I'm just winging it (knowing the possible consequences), but I can smell that the car is running rich while spraying, so I'm not too concerned.
I used 1 step colder plugs (Autolites, but NGK TR-6's are a great plug as well).
I'm not running a window switch, but it would be nice to have and it almost completely insures (unless the switch malfunctions) that you will never spray too early, or too high if you miss a shift. I would personally shut the nitrous off between 56-5800RPM. The higher the RPM you spray, the harder it is on the engine and for the stock fuel system to keep up with the demand. The car will pull up to 6k on spray, but you're peak power will likely be before then. I don't like to spray past 5500, although I have sprayed to 58-5900 in an 1/8th mile pass, and the car was leaning out on the long end past 5500 RPM.
If you want to do it right, get a kit that includes a wide open throttle switch and all the necessities you need to drop the kit in and spray. It's a great idea to install the window switch with the installation of the kit. If you have the money, it's not a bad idea at all to get a nitrous specific tune. MAKE SURE you get one from a shop that knows what they're doing, or you're almost better off not tuning at all (which is alright for a 100 shot and below).
I pay $3.20/lb or so. It cost $32 to completely fill my bottle the first time. Prices vary GREATLY by location though.
I put the kit on my car with 142,000 miles or so. I'm at 145,000 now and two bottles later. So far the engine hasn't flinched, and even the stock clutch is somewhat holding on. Best thing to do is spray a few times after getting it set up, read the spark plugs (several articles on this), and adjust if needed.
It's really fun, really makes the car fun to drive. It's there when you need it, not when you don't. Take proper precautions and it's relatively safe. Mechanical failures such as stuck solenoids and a weak engine are your biggest threat.
I would go wet with our cars. With a dry kit, you're relying on the fuel injectors to supply the fuel and I don't trust that on stock injectors. Therefore, larger injectors and a fuel pump are almost a necessity to be safe, and that's more than I want to get into.
I started out on a 75 shot, went through 4/5ths of a bottle before I got bored with it. Put in the 100 shot and still can't wipe the smile off my face. Going 75 to 100 doesn't look like a big difference on paper, but there is a significant torque increase and it really wakes the car up. I've gone through about two bottles so far since the first spray.
With the 75 shot, you feel the initial hit, but it doesn't pull really hard. It's definitely faster, but once it hits it just kind of takes off.
With the 100 shot, not only is the hit harder than the 75, but the car feels like it just got kicked in the ass as it takes off down the road. I imagine Tim's 125 shot, and people that run a 150 shot have even more fun.
For what it's worth, I'm running a stock tune that is slightly modified via my Diablosport Predator. I have pulled a couple of degrees of timing, and added more WOT fuel. Never put it on the dyno to check the A/F ratio, which is a VERY good thing to do. I'm just winging it (knowing the possible consequences), but I can smell that the car is running rich while spraying, so I'm not too concerned.
I used 1 step colder plugs (Autolites, but NGK TR-6's are a great plug as well).
I'm not running a window switch, but it would be nice to have and it almost completely insures (unless the switch malfunctions) that you will never spray too early, or too high if you miss a shift. I would personally shut the nitrous off between 56-5800RPM. The higher the RPM you spray, the harder it is on the engine and for the stock fuel system to keep up with the demand. The car will pull up to 6k on spray, but you're peak power will likely be before then. I don't like to spray past 5500, although I have sprayed to 58-5900 in an 1/8th mile pass, and the car was leaning out on the long end past 5500 RPM.
If you want to do it right, get a kit that includes a wide open throttle switch and all the necessities you need to drop the kit in and spray. It's a great idea to install the window switch with the installation of the kit. If you have the money, it's not a bad idea at all to get a nitrous specific tune. MAKE SURE you get one from a shop that knows what they're doing, or you're almost better off not tuning at all (which is alright for a 100 shot and below).
I pay $3.20/lb or so. It cost $32 to completely fill my bottle the first time. Prices vary GREATLY by location though.
I put the kit on my car with 142,000 miles or so. I'm at 145,000 now and two bottles later. So far the engine hasn't flinched, and even the stock clutch is somewhat holding on. Best thing to do is spray a few times after getting it set up, read the spark plugs (several articles on this), and adjust if needed.
It's really fun, really makes the car fun to drive. It's there when you need it, not when you don't. Take proper precautions and it's relatively safe. Mechanical failures such as stuck solenoids and a weak engine are your biggest threat.
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