so ive read and read old posts about spraying our cars. some say yes, some say no. and with out going big turbo im kinda maxed on mods. so i was thinking about doing a small shot. i already have the kit off an old car. so i figured i would make a fresh thread to get some opinions...... 35 or 50 shot ok? assuming my afr's were safe

 

Making sure your "afrs are safe" is a lot easier said than done, especially when it comes to nitrous and a forced induction engine (the rotary's susceptibility to detonation only makes it even tougher). The slightest mistake with regards to the amount of fuel necessary to compensate for the nitrous will result in a popped engine, meaning there is literally zero margin for error. This isn't like a NA engine where you have a little leeway; the higher combustion pressures complicate matters greatly. I wouldn't do it.

 

you will be safe if you go with a wet kit and go heavy on the fuel to start. do not try it without tuning it on a dyno. 50 is safe and without any problems. i would use a controller and keep it between 3 and 5k and full throttle only. you shoulg use nos to get going and then let the other stuff do the rest of the work.
remember WET AND LOTS OF FUEL TO START

 

fuel will not be an issue, nor will tuning it....only thing i see ill have a problem with what you said is.......i dont get full boost till 4500, so to only have it for 500 rpm's seems kinda pointless.....

 

He's talking about using the nitrous to help get your turbo spooled, which relatively speaking, is probably the "safest" method. I wouldn't exactly call it pointless.

This goes back to what I was referring to with regards to the difficulty in "tuning" nitrous in a forced induction engine. Once the turbo gets to full boost, your combustion pressure is already sky-high; adding nitrous increases it significantly, and at a far quicker rate. This not only substantially increases the risk of detonation occurring (especially as you begin pulling out fuel to get the A/F ratio anywhere near decent), but is also really hard on internal engine components.

Contrary to what a lot of people think, the way nitrous and turbos make additional power-- introducing additional oxygen and fuel into the combustion chamber-- is not exactly the same, especially with regards to combustion pressures over the course of the power cycle.

 

I have also found the design of the port is critical as to how it will respond to nos. If you have alot of overlap its like the wrong cam in a piston car. Ive had better luck with an n/a stock port for nos with a larger exhaust port. But im not claming to be an expert. I think its a $$$$$ risk.

 

part of the point is to help get to boost. nitrous acts as a type of boost so use it when you can really use it

 

well put kento.

 

Do you guys have the nitrous installed in your cars now?

Anthony

 

Im doing the same exact thing. I bought the Zex kit and highly recommend it. It has built in safety options of making sure your fuel pressure and bottle temp are correct for every use. If they're not correct, everything is reduced to compensate for your lack of pressure or temp. Also they have an option so your N20 cuts off at a certain boost, ie...to help you spool then turn off. Hope this helps.

 

The Zex kit you want is the P/N 82218. Its a wet system that incorporates an adjustable boost dependent elecronic switch. The system includes a Nitrous mgmt. unit, wet nozzle, a boost dependent switch and all plumbing/electrical connections needed. You can set the switch between 2 and 24psi.

 

If your signature is correct and you have 324whp, there are alot of other things I would do before adding nitrous, porting and turbo upgrades for a start. Ernie and his 735rwhp probably has a big enough turbo that adding more turbo to the mix wouldnt help much, so nitrous can play an important part to get things moving for him.

 

but for those that want to max out there twins, and just have fun at the strip?? I could see where a 35-50 shot wet of course would be handy!! i wouldnt do it everyday, or even eot.. but that once or twice a month deal at the strip i dont see why a 35hp shot would hurt the motor, if given proper fuel mods etc..

id have it start at around 4000 rpm and turn off at 7000rpm at WOT only.. if you tune right i dont see any issues that could arrise..

would boost creep be an issue on the stock twins on Nitrous?

has anyone ever ran nitrous on there twin turbo fd?? if so what was the result and how much was sprayed etc..??