Is there a preferred choice for a NOS system? Should it be a dry or wet system? Are the factory injectors and computer OK? What brand is anyone using and recommendations and rejections.

Thanks,

A

I've used Nitrous Express (http://www.nitrousexpress.com) on my Miata, wet kit, 75 shot. NX kit and a 50shot is fine on the SVTF.

There's also NOS ("naws" as everyone says..), ZEX, Edelbrock, Venom, Ny-Trex, and Nitrous Works.

Ive used NX and they seems to have one of the best systems...

wet
NX or venom for me

How big of a shot can the motor take?

i have a zex wet shot. bigger injectors. im running a 55 shot everything is in good shape
the thing i like about the zex is that there are no silanoids it runns of the throttle censor so when your at full throttle is sprays. makes things alittle easyer (your not pressing buttons while your shifting. and i think its one of the easyest to install.

usually people use the window switch along with the throttle censor...
but I've heard that people use a shot anywhere between 25-100, 100 with higher injectors I guess, but 50 is a good tradeoff between performance and safety when you have the stock stuff... if you wanna go 100, you should get tuning and bigger injectors

right-o well put

This post is full of inaccuracies.

1. Not to be an ass, but NOS is a company... call it nitrous, as in "What type of nitrous system should I get" so you don't sound like you just watched F&TF.

2. NX makes the best quality (aside, maybe, from venom which is way to expensive and unnecessary) soleniods.. stick with the Ford EFI Universal wet kit.

3. Avoid dry kits on the SVT, with the shot size you'll run (35-50) you won't run into fuel puddling problems like you would with a wet kit on higher shots (100+). With dry kits you either need a tune or rely on the MAF to adjust the fuel. (Except in the case of return-type fuel rails where you can also bump the fuel pressure up using vacuum and the FPR)

4. You DO NOT need to upgrade injectors with a wet kit, you plumb a line from the fuel rail and the extra fuel for the nitrous is sprayed in separately (nozzle injects both nitrous and fuel together for atomization). Sometimes with wet shots you need to upgrade the fuel rail and/or the fuel pump.. BUT with a 50 shot you will fine with stock components.

5. You do not "need" a tune with a properly jetted wet kit.. although you should dyno it to make sure your AF is safe (10 is safer, 11 ish is ok, 12 is getting a little too lean but makes max power for nitrous). However, that doesn't mean you won't pick up power with a tune. Best advice before you put a sniffer on it is to use +1-2 jet sizing on the fuel noid for safety.

6. Use a fuel pressure safety switch, some sort of throttle switch, and a window switch

Also, not a lot of people seem to know this BUT as far as HP gains go...

NOS jet sizing rates HP at the crank
NX rates as approximate gains at the wheels (most dyno higher than rating however)
Zex is at the crank I'm pretty sure

No idea about venom and other brands.

So, a 75 NOS shot is equivalent approximately to a 50 NX shot as far as HP gains go.. they are not using magic nitrous just a different jet rating.

yeah i was looking at getting a zex system. the type that engages the giggle gas at wide open throttle. i was wondering what kind of aftermarket parts should i have before installing the system. i already have a slew of bolts on, but i just want to make sure i dont f my car. i already emailed the company. in their reply it was explained to me that the only upgrade needed to run a 50 shot on a stock motor was 2stage colder spark plugs. i have heard rumors from others using the zex system that an ignition upgrade would be wise. last but not least, does nitrous have any wear and tear affects on any of the stock parts such as clutch,motor, or fuel system. thanks.

Originally posted by peppersharksvt
yeah i was looking at getting a zex system. the type that engages the giggle gas at wide open throttle. i was wondering what kind of aftermarket parts should i have before installing the system. i already have a slew of bolts on, but i just want to make sure i dont f my car. i already emailed the company. in their reply it was explained to me that the only upgrade needed to run a 50 shot on a stock motor was 2stage colder spark plugs. i have heard rumors from others using the zex system that an ignition upgrade would be wise.

1-2 steps colder is ok for nitrous. If you go too cold you will run into idle and drive-ability problems. Also, you want to run a COPPER plug gapped at around .035-.040". Nitrous will eat the platinum off the platinum plugs. Also, Personally I would avoid Iridium plugs because of the smaller tip on the electrode (can become a point for detonation to occur). And the fact that they are a total waste of money 99% of of the time.

Stock ignition coil is fine for nitrous as long as you gap the plugs down.

last but not least, does nitrous have any wear and tear affects on any of the stock parts such as clutch,motor, or fuel system. thanks.

Yes, yes, and not really. The fuel pump will push more fuel, but as long as your operating it at stock fuel pressures the extra strain isn't really that hurtfull. The focus uses a really good pump.

I like way the Saleen N20 system works. Is there any aftermarket companies that make that kind of system. I have never really considered using nitrous before so I dont know much about it. The N20 system is pretty much always on. I like that because you get a good boost but not like an over kill. Better on the engine and longer use off one tank.

does saleen sell saleen nitrous kits?

the N2O saleen is such a hot focus, but I hate the rear wing

I was going to get it but it's just too low to the ground for Michigan roads and I need something I can use as a daily driver

their stereo upgrade is soooo sick though, you can get the same in dash DVD, rearview camera, and premium sound system that the S7 has

You are right. I should have stated N2O systems. Thanks, good info!

what the heck is the window switch reference to. makes no sense. i bet you can not make me believe it. what is wrong with a "real" switch?

Window switch- activates deactivates nitrous
wot sensor- when you go WOT, the giggle juice gets sprayed by the nozzles

I like way the Saleen N20 system works. Is there any aftermarket companies that make that kind of system. I have never really considered using nitrous before so I dont know much about it. The N20 system is pretty much always on. I like that because you get a good boost but not like an over kill. Better on the engine and longer use off one tank.

With any nitrous kit, you wouldn't want to have a system that is always on. Nitrous gases would build up in your intake manifold. If left long enough, when you start your car you can have a rather large explosion. That why its always important to have a purge system and to close the damn bottle.
In terms of any aftermarket company making a "system like Saleens", I don't think there is that big of a difference between saleens and anyone else. Correct me if I am wrong, but I believe Saleen doesn't even sell a nitrous kit. You can get nitrous if you purchase the whole n20 Focus from a Saleen dealer, but its not available as a kit. Even when you get the whole car, you still need to finish wiring it up for it to work, not like you can buy one and press the nitrous right off the dealer's lot.
I also hear a lot of people talk about one kit being better that another because it comes with a WOT switch. For all the rookies who may think this is a good option, every manifacturer of a nitrous system has a WOT switch option....