Where in the fuel line did you put your fuel pressure safty switch?

 

Fuel rail > fuel line > FPSS > Fuel solenoid

 

So you have the adapter for the FPSS connected right to the solenoid?

 

As far as I can remember I do. I can go check tomorrow if you would like me to.

 

If you don't mind. You don't have a pic of it by any chance do you?

 

Someone on the board gave me the idea of putting the fpss after the fuel solenoid (fuel rail-noid-fpss-nozzle). Then only have it grounding your n2o solenoid. The idea is that not only will it make sure your fuel pressure is ok, it will also make sure that the fuel solenoid actually opened. This could save a very expensive accident if the fuel solenoid swelled shut or didn't open for some other reason.

I have the switch at my house, does anyone know if this will work? I think I will put it on tomorrow and find out unless someone tells me that this is a bad idea.

Dustin

 

Dustin,
If Iitw works can you re-post on this topic so I'll know. I'm not real sure how I want to set mine up yet.

Thanks,

 

I think there's a pic in my cardomain link in my sig. I don't know if you can see the adapter and FPSS, though. I'll go look tonight because I'm booked all day.

About the FPSS on the other side of the solenoid. It sounds like a GREAT idea, but it's not seeing fuel pressure until AFTER the solenoid is opened. Therefore, if your FPSS was seeing no pressure, the solenoids wouldn't even open would they?

I'm sitting in class trying to not let the teacher see so I'm rushing so my reasoning might not be right. Be back on later.

 

"Someone on the board gave me the idea of putting the fpss after the fuel solenoid (fuel rail-noid-fpss-nozzle). Then only have it grounding your n2o solenoid. The idea is that not only will it make sure your fuel pressure is ok, it will also make sure that the fuel solenoid actually opened. This could save a very expensive accident if the fuel solenoid swelled shut or didn't open for some other reason.

I have the switch at my house, does anyone know if this will work? I think I will put it on tomorrow and find out unless someone tells me that this is a bad idea."

Nope, good thought but there is no pressure AFTER the fuel solenoid until after it opens therfore it would never activate them. Maybe a FPSS that waited 1 sec before it read the pressure?

 

That's ture, I didn't even think of that. I couldn't see the FPSS in your pics if it's in there. Your solenoids are in plane view, but I couldn't see the switch.

 

"Nope, good thought but there is no pressure AFTER the fuel solenoid until after it opens therfore it would never activate them. Maybe a FPSS that waited 1 sec before it read the pressure?"

This is what I thought at first too, but it should work the way I explained it (I may not have explained it good enough).

The ground for the fuel solenoid is not run to the fpss (if it was you are right he fuel solenoid would not be able to open). Only the N2o solenoid is. When all of the switches are closed (system arm, window, WOT etc) The fuel solenoid and the N2o solenoid both see power. The Fuel solenoid is grounded straight to the chassis so it will open. The N2o solenoid is grounded to the chassis but through a fpss. It will only be grounded if the fuel solenoid opens and the fuel pressure is acceptable.

I'm not sure how well I explained it but maybe that clears up what I was thinking. I am pretty sure that the logic of the idea is good and should work in theroy. Unfortunately it just started raining and is supposed to for the rest of the week so I don't know when I can try it out. I am going to go set it up this way now anyway.

Dustin

 

ohhhhh I see, hey that is actually a really good idea in theory. The nitrous would be delayed until fuel pressure was up not sure if you would feel the delay or not but I really like your idea. I may be re-wiring my system! What does everyone else think?

 

BTW, the FPSS is in my pics in the cardomain link. Scroll down to the one of the fuel solenoid with the guy's hand in the way, click on it to enlarge. You're welcome.

 

I saw it later. I was looking at the wrong picture.

 

I just hooked it up that way and if it is dry tomorrow I will go out and let you know how it works. I am thinking the delay will be almost too short to notice but we'll see.

Dustin