Nitrous on demand?

[antirice]

ok, lemme run this idea by y'all

set up the N20 tigger so that it is attached to the go-pedal somehow so that when you have it floored (like when getting on the expressway/highway) it sprays. does this make sense?

[MJE95GAGT]

thats how most work already, spray at WOT

[antirice]

I mean, so that you don't have to trigger it yourself, just have the thing automatically kick in at a certain rpm and gear

[Travis99GT]

You can set a Window switch up so when the nitrous system is activated it auto sprays between certain RPM's, useful so you dont spray through the shifts which can tear apart a tranny really fast. But there are quite a few kits that spray only when the car is at WOT.

[TA^Guy]

The two most commons ways a N2O system is activated is either by a push button or micro switch.
On both systems you arm the system with a toggle switch of sorts. This supplys the solenoids with power. Then when you push the button the solenoids activate and spray. With a mircoswitch it's typically mounted to the carb or throttle body near the throttle linkage. A bracket is supplied or custom bent so it mounts the switch just behind the linkage. When the linkage rolls back to WOT it click down on the switch which will activate the solenoids.
Those are just basics, there are plenty of other setups and controllers for various uses.

[MagusXIII]

Well, you DO want that master arming switch that john says. At the very least, it will prevent an accidental spray. One time, I had my arming switch on, forgot about it, and did a spirited acceleration away from a stoplight. LOL, I almost ran right into the trunk of the person in front of me. SO u can see why you would at least want to determine if u wish to spray at all.

Almost all EFI kits today have that throttle mounted microswitch. The ZEX kit uses voltage off the throttle position sensor to determine WOT. Below is a pic of how my throttle microswitch is mounted.


Don

[antirice]

ok, then how about only spraying when it shifts into OD?

[LoneRangers15]

Why not just mount the button to the floor so that when you press the peddle all of the way down it will hit the button?

[Phantomus]

Why not just mount the button to the floor so that when you press the peddle all of the way down it will hit the button?

Durability my friend. A floor mounted switch, as tempting as it sounds, would have to endure the force of your foot while you race, which is to say the least, quite a few pounds. This would break your switch after a dozen or so races. A throttle body mounted switch is set up so that at WOT, the switch is being depressed with very little force or stress on the switch. This will keep your switch alive for many future races to come.

:)

[1995grandam]

ok, dumb question, but people keep saying WOT....whats that?

[Phantomus]

WOT is an acronym for "Wide Open Throttle". It basically means while you are flooring your car and the throttle body is opened to it's maximum.

[MagusXIII]

WOT also has a safety factor involved. In the event of a nitrous backfire, the throttle butterfly as well as the throttle body is less susceptible. Of course, it is best for performance reasons as the nitrous can be burned off faster (well DUH!!!! :P )


Don

[Phantomus]

ok, dumb question

No such thing as a dumb question, we're always learning.

:)

[1995grandam]

ok then, whats the difference between a wet shot and a dry shot of nitrous? is wet like the liquid from of it and dry is the gas?:???:

[MagusXIII]

Originally posted by 1995grandam
ok then, whats the difference between a wet shot and a dry shot of nitrous? is wet like the liquid from of it and dry is the gas?:???:
A wet shot means that fuel and nitrous are injected at the same time and location in the intake tract. The fuel supply to the injection nozzle or plate is supplied via a tap into the fuel lines or from a schrader valve fitting on the fuel rail.

A dry kit means nitrous only is injected into the intake tract. It is up to the injectors themselves to supply the additional fuel needed to support the nitrous. This is usually, but not always, done by applying vacuum to the fuel pressure regulator to force extra fuel to be injected.


Don

[Phantomus]

That pretty much sums it up 1995GrandAm. Try this link for a little more information. I think you'll like it.



http://www.grapeaperacing.com/GrapeApeRacing/tech/nitroushow.cfm

Try the technical info in this one...

http://www.barrygrant.com/nitrousworks/frames/

Hope you like it.:)