so no relays or whatever for me. 
why relays for nitrous
why relays for nitrous May sound like a stupid question but im still learning some thihgs here. What/why are realys used for the solenoids? I know what they do and how they work but how critical is it to use um? Reason i ask is because every kit comes with them and i know a hand full of people that dont use um and there system works fine. I got one for my kit, its a 40/30 amp one. For instance my buddy has the NX MAF kit and his noids are pretty big and hes not using any relays, got it wired from the micro switch and it works fine. Fill me in on the tech part of that. thanks 
They are used to keep your switches from having to handle the full amperage needed by the solenoids. If you don't use them you will destroy the switches. They are only designed to handle a few amps.
Originally Posted by slow trap
i don't use any relays and mine worked fine for a year or so but unfortunately right now i have a problem either in the switches or microswitch.
Launching!
Joined: May 2006
Posts: 217
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From: Huntington Beach CA
You can run it with out a relay if the arming switch is capable of handling the amperage. NOS started using relays on the fuel injection kits as a c.y.a. thing they didn't want to potentially be on the hook for frying someone’s computer. But the plate kits still came with just an arming switch.
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A couple reasons why relays are a good idea. Yes, some of the small low amp draw noids work fine with out a relay. However, even then, if you have a problem do you want the high amp wire in your interior? Have you guys ever had a melt down from a high amp wire in the interior, not good, a safety reason to have high amp wires in the engine bay only.
Another reason, especially on higher amp noids, is to have the battery 12v source as close to noids as possible. You have have less current draw through having less resistance by keeping main power wire short, and noids will work better and last longer this way.
I wire all my devices this way. The low amp side of the relay only requires a few milla amps to activate the high amp side. So, all your low amp switched 12v sourced relays can be supplied by one keyed 12v source in the interior and they all won't add up to one amp, very, very safe and efficiant to do it this way.
Robert
Another reason, especially on higher amp noids, is to have the battery 12v source as close to noids as possible. You have have less current draw through having less resistance by keeping main power wire short, and noids will work better and last longer this way.
I wire all my devices this way. The low amp side of the relay only requires a few milla amps to activate the high amp side. So, all your low amp switched 12v sourced relays can be supplied by one keyed 12v source in the interior and they all won't add up to one amp, very, very safe and efficiant to do it this way.
Robert
Originally Posted by steveo346
i just bought a relay for my kit, cost me $24 bucks....we use the relay from some recalls for cavaliers...they work just fine
here's a $5 one. http://cgi.ebay.com/RELAY-and-with-S...QQcmdZViewItem
