Is a FPSS really needed?
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Teching In
Joined: May 2003
Posts: 11
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Is a FPSS really needed? I have a NOS 5177 kit and I'm contemplating not even using the fpss. It seems like it's a bigger headache than its worth. so do I really need to put this thing on or am I safe without it?
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Teching In
Joined: May 2003
Posts: 11
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Originally Posted by IntenseSS
Is it as much of a headache as installing a new motor???
TECH Junkie
iTrader: (7)
Joined: Nov 2001
Posts: 3,378
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From: From the Bowels of Hell!!! You want some of me bitch?!?!?!
Yeah, I have had problems with mine. I even tried to tweak it a bit and it still surged on me Screw em. Just make sure you have a good fuel system.
The Bull
Joined: Jun 2002
Posts: 3,578
Likes: 2
From: Grand Rapids, MI
This is the type of question where you will get a 50/50 response. Technically NOS and NX recommend it, however a great number of people have had issues with them. It's cheap technology and sometimes doesn't hold up well. It can be flaky for some and just as risky if you wire it up.
For instance, if the unit is flaky and it starts toggling your fuel on and off, or if your kit kicks on and off (wire the fuel and solenoids through the switch off a relay) you will have some heartache to deal with.
Personally I do not use them. I rely on good working equipment and a good eye on the gauges. I've seen others put it into their system and notice that they basically screwed both wires together to short circuit them. And others run them with no issues. In your case if you wire it in and it works, great. If not, try something else out. Let us know how it goes.
For instance, if the unit is flaky and it starts toggling your fuel on and off, or if your kit kicks on and off (wire the fuel and solenoids through the switch off a relay) you will have some heartache to deal with.
Personally I do not use them. I rely on good working equipment and a good eye on the gauges. I've seen others put it into their system and notice that they basically screwed both wires together to short circuit them. And others run them with no issues. In your case if you wire it in and it works, great. If not, try something else out. Let us know how it goes.
Damn it guys, i ordered a fpss with my tnt wet kit and im debating on whether to put it on now or not. I did not know people were having so many problems with them. this makes me kind of skiddish 
. Oh well
. Oh well 
I had issues with mine, till I adjusted it. Install it for piece of mind.
The one time you spray and your fuel pump dies, you are going to wish you had one.
I have all the safety devices, and have been running N20 for 2 years with no problems yet. <knocking wood>
The one time you spray and your fuel pump dies, you are going to wish you had one.
I have all the safety devices, and have been running N20 for 2 years with no problems yet. <knocking wood>
Originally Posted by Ed LS1 Vert
I had issues with mine, till I adjusted it. Install it for piece of mind.
The one time you spray and your fuel pump dies, you are going to wish you had one.
I have all the safety devices, and have been running N20 for 2 years with no problems yet. <knocking wood>
The one time you spray and your fuel pump dies, you are going to wish you had one.
I have all the safety devices, and have been running N20 for 2 years with no problems yet. <knocking wood>
On The Tree
Joined: Oct 2003
Posts: 100
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From: houston
What is a FPSS? Thanks , im considering nitrous b/c i have and offer for a NX wet kit off my friends Impala SS for 300 and he bought it new like 6 months ago for $6-700 so im thinking of buying it and spraying a 100 shot just so i dont have to worry about anything. But i have an M6 so im researching the best way to do this.
The Bull
Joined: Jun 2002
Posts: 3,578
Likes: 2
From: Grand Rapids, MI
Fuel pressure safety switch or otherwise known as a Hobbs switch. Basically it's a normally open electrical contact that is closed with X psi of fuel pressure. You use that contact to a relay so that you can disarm your nitrous if the fuel pressure goes below the predetermined pressure (X).
