NItrous controlers

[8yourM5]

Ok so I am thinking about buying a FJO nitrous progressive controler. My question is if I am on the freeway will my nitrous still build up while the rpms build up. this controler makes it almost like a centerfugial supercharger in the sense it lets the nitrous build like boost. I also want to know what kinda shot I should run . I have a direct port nitrous and then setup a seprate full gas tank for race gas and a fully build 426. I am thinking about starting at a 250 and going to a 300 a little later. Thanks guys

[8yourM5]

no one???

[JonzMgnm]

I don't think anybody is taking you serious.................

[hemidup]

Progressive controllers are easy on hard parts. I was thinking of getting one to replace my 2 stage. I think a progressive controller with my supercharger would be the cat's meow.

[8yourM5]

Ok so can some one tell me a little more about them? how do tey regulate and so on. How will it very from highway to a race form a dead stop. thanks

[MOL SRT-8]

they regulate by flutering the solenoid open and closed quickly. imo this is not good for the solenoid, i personal would never use one that's why i am biulding a 2 stage system.

[Frozen_]

its doesn't build boost like a supercharger. It doesn't take a 200shot and make it a 50 shot then a 100 shot then a 150 shot then a 200shot. It takes a 200 shot and just sprays if for a few milliseconds and over time it increase the time that it is spraying. BUT IT IS SPRAYING A 200 SHOT THE WHOLE TIME!!

if you want less nitrous at a lower RPM run a dual or triple stage system.

and i don't really know what you mean about. how will it change from highway to race to dead stop.....umm it should never be running when your cruising down the highway. and it should never be run at a dead stop.

either I'm not understanding your question, or you really don't understand nitrous.

[Nightshade]

.... and it should never be run at a dead stop.

ACK.. I'm not supposed to be spraying idle at the light?

[Frozen_]

ACK.. I'm not supposed to be spraying idle at the light?

LOL

[HEMIDON]

You should NEVER spray nitrous under any conditions other than WOT. Nitrous produces combustion temps that will damage pistons, rings and spark plugs with continuous use. You should NEVER spray for more than 10 seconds without allowing a cool down. No matter how a nitrous system is controlled, there MUST be some type of WOT control.

Progressive controlers....

With a progressive controller actually pulse the system solenoids much like a fuel injector. By setting the maximum spray with jets the controller can than be programed for what % of max would be the starting point. There then must be a setting for when to turn it on. Most progressive controller "ramp ups" are based on time. A window switch can be used to turn the system on and off at different RPM settings. There are also other controllers available that can be set for a number of drive shaft revolutions.

What ever system or control you decide on, the max spray will be determined by what solenoids you use. Fogger nozzles are also limited to their capabilities. The size and length of the hose from your bottle to the solenoids will also limit what your max can be. The #4 line that comes with most systems is limited to about 250 HP. The factory fuel pump and lines are getting close to maxed out at 750 HP total engine output.

So, what ever you decide on doing, there are lots of things to consider when working with nitrous. Also keep in mind, depending on how its jetted, for our applications, you only get 3-5 seconds of juice per pound of bottle volume That's at most 5 to 6 1/4 mile runs on a standard LB bottle with a 100-125 shot.

[8yourM5]

Frozen thanks man but I have had nitrous for almost 2 yers now. I understand it fine I know you should ave more than 59 psi before you spray and my kt only works under wot. My kit now has a window switch where I cant skip first gear so I cant spray a 300 shot out of the hole. I know nitrous SHOULDNOT ever be sprayed unless at WOT. I thought the controler only opened the silonoid a little or somthing like that so I didnt knwo if I stabbed it on the free way would I feel a 300 shot at 4k rpms or would I not feel it till 5k rpms.
I guess my best bet is to just put a 100 shot from the hole( single fogger kit) and a 250 threw the direct port kit?

[8yourM5]

Hemidon I have 3 bottles I am not worried about psi dropping durning my runs. I know with a 300 shot I will only get a few passes with all 3 bottles open.

[Nightshade]

Hemidon I have 3 bottles I am not worried about psi dropping durning my runs. I know with a 300 shot I will only get a few passes with all 3 bottles open.

\

300 shot? Hope you are running a specifically built engine for spray then.. do 300 shot on a stock internals I would suspect it would not end well.. a few passes at 300 shot? I would like to see even one full run at 300..

Also.. 59psi? huh? you are missing some zeros right?

[HEMIDON]

Hemidon I have 3 bottles I am not worried about psi dropping durning my runs. I know with a 300 shot I will only get a few passes with all 3 bottles open.

Bottle pressure is not the only limiting factor of how much you can spray. If you are going any more than 250 you need to use a #6 line from the bottle so it can get enough volume. You will also need solenoids capable of spraying over 250. I could be wrong, I think the ZEX controller is limited to 175. I know the NOS sniper I have on my 1st stage is limited to 150. The passages and valve in the solenoids just are not big enough. Also, over 250 you will need a separate fuel pump so you can get the fuel volume. The OE fuel system line size and pump will limit what you can feed. The last thing you want to do is max out your fuel supply and run lean.

[Ray@NitroDaves]

Ok so I am thinking about buying a FJO nitrous progressive controler. My question is if I am on the freeway will my nitrous still build up while the rpms build up.

This will depend on how you program the FJO...it can either do time based or RPM based ramping

examples:
time based.
activate at 50% then ramp to 100% over 1.3 seconds
RPM Based
activate at 50% at 3500RPm then ramp to 100% at 6000 RPM

this controler makes it almost like a centerfugial supercharger in the sense it lets the nitrous build like boost. I also want to know what kinda shot I should run .

A progressive is not designed to be used as a HP controlling device, they are a traction control device. THey work by pulsing the solenoids...50% means the solenoid is open 50% of the time. Solenoids are either open or closed, nothing in between.

I have a direct port nitrous and then setup a seprate full gas tank for race gas and a fully build 426. I am thinking about starting at a 250 and going to a 300 a little later. Thanks guys

As long as the motor was built with nitrous in mind that power level should be fine. The key is in the tune, Timing, A/F ratio, and plug choice is critical at that power level.