Using Nitrous

[Itzallstock]

A few questions I thought of that I could not find the answers to......

1. Can you use Nitrous in 1st, 2nd, 3rd, and 4th gear to get your engine to the "red line" faster?

2. On a 1g N/T How long should you hold down a 75 shot? I Bought an NX kit and will be running a mechanical oil pressure gauge and A/F gauge.

3. As far as watcing the gauges, what do I want to look for to make sure i dont waste my engine?

Thanks guys, Dont flame to too bad..........
-Ben

 

[rys]

You're gonna probably get flamed pretty bad, but here's some partial answers:

1. Yes, but redline isn't the point of maximum horsepower.

2. The longer you hold down the button, the more stress and temperature will be introduced to the block. A full 15-17 second run is acceptable, but be warned that high cylinder temperatures can cause a piston or a valve to melt. You might want to consider an EGT gauge. Time must be allowed for the cylinder temperature to drop after nitrous assisted runs.

3. An A/F gauge and oil pressure gauge are almost worthless for nitrous. Oil is a general requirement for the engine. So long as your stock oil pressure sensor is functioning properly, the gauges most relevant are: Wideband O2 (Not the stock O2 sensor or A/F connected to the stock O2 sensor), EGT, Fuel Pressure, Nitrous Pressure.

-Brian

 

[Itzallstock]

I Shouldnt of said red line. I Meant to my "max line"

EGT, What will that gauge tell me to watch out for?

Wideband O2? What is that? Not the same thing as the a/f ratio gauge I bought?

When you say fuel and nitrous pressure, what do I want to look for on those gauges when the nitrous is running. I have a mechanical nitrous gauge but I belive it jsut sits up in front with me to let me know how much I have left in the tank.

Thanks for helping me,
Ben

 

[rys]

I Shouldnt of said red line. I Meant to my "max line"

EGT, What will that gauge tell me to watch out for?

Wideband O2? What is that? Not the same thing as the a/f ratio gauge I bought?

When you say fuel and nitrous pressure, what do I want to look for on those gauges when the nitrous is running. I have a mechanical nitrous gauge but I belive it jsut sits up in front with me to let me know how much I have left in the tank.

Thanks for helping me,
Ben

EGT = Exhaust Gas Temperature. It will let you know if you are going to melt something. It comes with a sensor, the sensor should be installed in the exhaust manifold near the head, on the hottest cylinder. (Closest to the timing belt).

You bought an A/F gauge that hooks up to the stock O2 sensor. Your car comes with Narrowband O2 sensors. A narrowband O2 sensor is not fast enough or accurate enough to let you know if the A/F ratio is correct. Widebands react fast enough, and are accurate enough to relay this information.

Fuel pressure should not fall below the factory specification for your vehicle, (I do not know what the pressure is for your vehicle). Under spray, if fuel pressure drops below what it should be, it may cause a lean condition and damage. Nitrous pressure helps ensure that your bottle pressure is at the appropriate PSI for your application Each nitrous system is built on a specific PSI from both the fuel and the nitrous bottle. If the pressure is not the same from both the fuel and nitrous bottle for each run, you will have inconsistencies between your runs. (The air/fuel ratio will change).

-Brian

 

[86MCSS]

No offense to you but after reading this and a couple of your other post. You do not have enough knowledge about nitrous to use or install it on your engine. Read a lot more and ask twice as many questions. This is what this "message board" is for. Im just saying this to save your engine because I can almost promise you will destroy it before you know what is going on...

Things to keep in mind when using nitrous..
1. Never use or hold the nitrous button for more than 15 seconds at a time. Nitrous adds a lot of heat to your engine and can melt the internals very quick.

2. Bottle temp. must be kept at optimum pressure at all times during use. I prefer about 1100*. If temps are not where they should be using the nitrous will be pointless and it will not add its full power that it should.

3. As mentioned before an EGT guage would be nice to have when using nitrous. EGT means exhaust gas temperature...if the temperature coming from the exhaust is getting to hott you know something is wrong.

There are many other things to look out for as well...Did you buy a new kit or used kit? If its new there is a handy booklet with new kits that is a good read and the what to do and what not to do when installing a nitrous kit. Read that book over 3-4 times and make sure you understand everything it says.

A few questions I thought of that I could not find the answers to......

1. Can you use Nitrous in 1st, 2nd, 3rd, and 4th gear to get your engine to the "red line" faster?

2. On a 1g N/T How long should you hold down a 75 shot? I Bought an NX kit and will be running a mechanical oil pressure gauge and A/F gauge.

3. As far as watcing the gauges, what do I want to look for to make sure i dont waste my engine?

Thanks guys, Dont flame to too bad..........
-Ben

 

[Itzallstock]

Thanks a ton man. I will read that book for sure many many times. When you said 1100* did u mean psi or degrees? I do not currently have a bottle heater.....
Explain a little more?
-Thanks
Ben

 

[ShadowWulf]

1100 psi. i normally sit at about 900-1000psi without a heater on a full tank

I find the oil pressure gauge useful for myself actually, lets me know EXACTLY whats going on at any time. A/F gague is a rough guestimate, nothing more, but it has its uses. The EGT gauge is a nice one to have.

And there right, i told you before man, 15 seconds is the absolute MAX you should safely use n20 for. Besides, relisticaly talking you should be able to run a 14.5 anyways And since spraying in 1st is pointless because youre going to break loose..........i figure no more that 12-13 seconds on any resonable run.

 

[DSMJim]

Read your nitrous book it will answer these questions.

As far as EGT goes, run your car without nitrous right to redline through a few gears and see what the EGT is. It will be hotter with nitrous as your buring a more volitile mixture but it should be with in a hundred deg or so (ish...) As long as it's consistant when your spraying then your ok. The number doens't matter much (as long as it's not off the chart) but that it's consistant when your doing the same thing and not all the sudden way higher one day, then you know it's a problem.

For a wideband (which is not an a/f gauge) www.innovatemotorsports.com have a peak at their website that will help you there.

NX claims you can spray as long as you want but remember that nitrous builds a lot of cylinder pressure and if you hit it at low RPM in a high gear (like 2000rpm in 5th) your motor does not have the ability to rev and that will blow it up. 2000rpm in 1st however is fine because your motor will easily rev to redline. After 1st try and spray around at least 3000rpm or better to be safe. You will notice redline comes a lot faster with nitrous than it did before.

 

[Itzallstock]

Thank you guys VERY much. I am still getting body work done, thanks a lot!
-Ben