NOS power requirements

[66n2ocoupe]

I have a NOS fogger system that has been giving me trouble ever since it was installed. The Nitrous solenoid (cheeter) will not stay engaged or does not open at all. Fuel solenoid works fine and subsequently drowns the engine. I am only running a 125 shot, but can not get a clean run. I am running single fuel and nitrous solenoids with a single 16 port distribution block. I have a seperate fuel system and have the system set to 6 psi flowing pressure. I have varied the bottle pressure from 900 to 1050 with no real changes. The funny thing is the system seems to work fine on the street. Its only when I get the slicks on does it not seem to work properly?? I currently do not have a relay wired for the solenoids, but I do have a fused arming switch, and a full throttle micro switch. Do I have to run a relay to make this thing work? Is the cheeter solenoids a POS? I have checked the wiring several times and it all seems fine? Is there too much electrical load? Any help would be appreciated.

[memphis306]

the wot switch probably cant carry the current needed to hold the solenoid open.you really need a relay.also,those solenoids get gummy inside and might need be cleaned every once in a while.

[NMRAPaul]

Definitely put both solenoids on a relay. The power draw can be considerable, and WOT microswitches weren't designed to handle that much current.

Also, be glad that the nitrous solenoid is the one that's staying closed!

[brothern2o]

years ago had brand new big shot system wouldn't work rewried system new baterry, tried everything for months, finally replaced solenoid and never had a problem since. Sometimes solenoids just go bad or are just bad from manufacture had an nx fuel solenoid that was bad when new but that had a lifetime warranty. fyi

[66n2ocoupe]

Thanks for the information. I went to the track this weekend and have a little more information. It still did not work properly so I got a few other racers to help disgnose the problem. The fuel solenoid is working because it damn near drowns the motor. I have the only car that goes faster on motor than spray.lol... anyway if you disconnect one of the N2O fogger nozzles and hit the microswitch you get a relatively small spray out of the tube, and it is mostly air, it took about two or three seconds before the tube got cold and we saw some real liquid. I switched bottles for the next run, thinking I had a bad fill, but the results were the same. Back to the pits and we armed the system ran the car to about 3,000 RPM hit the micro switch and the car jumped to about 4,000 RPM.... The other guys said that was nothing and seemed convinced the solenoid was either bad ot there was a blockage. So as of right now I have rewired the system, added relays, verified throttle linkage adjustment, verified, both solenoids are actually engaging (can feel them click). The cheeter solenoid is practically new, but it could definetley be bad or resticted. My question I guess is... should I be switching to an NX, Proform or some other brand solenoid. This motor will only see 150HP shot max and I want to stick with the -4AN nitrous feed lines so any additional information and opinions would be appreciated. BTW the car weighed in ad 3200 lb and ran 11.88 at 114 this weekend. I would like to think this little street car has a high 10 sec pass in it with everything working. Thnkas again for your input

[Jeff88coupe]

I would just get a rebuild kit for your NOS nitrous solinoid. Rebuild it and it should be fine if you have the wiring taken care of.

[Joshua207]

the -4 will hold a 250 and no more

[brothern2o]

I agree rebuild solenoid or just borrow one from someone to try then you will know right away when you open a solenoid nos should flow like the niagara. IMO

[66n2ocoupe]

Thanks for the input. Has anyone else used the 2 to 16 distribution block? I will try anothersolenoid, but it might also be gummed up in the lines or distribution block??? If I could figure out how to post a photo I could show my setup.

[brothern2o]

nitrous system should be extra, extra clean if there is anything shouldn't be anything in block or lines I try not use pipe dope when putting everthing together instead I use pipe tape.

[NMRAPaul]

nitrous system should be extra, extra clean if there is anything shouldn't be anything in block or lines I try not use pipe dope when putting everthing together instead I use pipe tape.

Every installation sheet I've ever seen advises the exact opposite - never use teflon tape on a nitrous system, because the shredded bits can find their way into the jets.

[66n2ocoupe]

Yeah, I've always thought the same thing. I used the liquid teflon tape for this installation.

[brothern2o]

oops my bad had a plumber show me how to do the pipe thread parts so the tape would not break apart. Sorry, I guess just be carefull with pipe dope.

[sso2028]

have you looked inside your nos filters to make sure they are clean ? sounds like you may have had a contaminated refill tank, and your filter maybe plugged up with some rust, every once in a while everybody gets one so i am speaking from experience. the 50lb steel cylinders sometimes get rust build up inside and if the refiller doesn't have a good filter on his refill line right into your aluminum cylinder it goes. there should be one blue fitting with a real fine screen that threads into your nos solenoid that is your filter. also you should have one in your purge solenoid, usually that gets clogged first and purges funny and usually will continue to hold pressure in your line. does your purge solenoid work good or does it seem like its restricted? this should be very easy to determine. now if you didn't have any filter on your system then you better take everything apart and go through it piece by piece. chances are your wiring is fine and i really have never seen a bad solenoid maybe a worn or damaged plunger but thats about it, and your #4 line will be fine i have run #40 jets with #4 line which is 400hp just make sure its not kinked or crimped anywhere. hope this info helps i feel your pain it sucks to have stupid problems.

[66n2ocoupe]

Thanks sso2028, I borrowed another bottle at the track to eliminate the possible bottle contamination scenario with the same results. I did pull off the fogger system and tore down both solenoids, cleaned all the lines and fittings. I had one blocked fuel jet so everything was throughly cleaned. Mike Nelson at Nitrous Supply suggested I switch to the teflon plunger to eliminate any possibility of a solenoid problem. I should be up and running today. I do not run a nitrous filter, but I have not checked the purge solenoid. That inlet fitting may have a filter in it and it could be dirty. I will pull it out to take a look. Thanks again for your input.

[sso2028]

Thanks sso2028, I borrowed another bottle at the track to eliminate the possible bottle contamination scenario with the same results. I did pull off the fogger system and tore down both solenoids, cleaned all the lines and fittings. I had one blocked fuel jet so everything was throughly cleaned. Mike Nelson at Nitrous Supply suggested I switch to the teflon plunger to eliminate any possibility of a solenoid problem. I should be up and running today. I do not run a nitrous filter, but I have not checked the purge solenoid. That inlet fitting may have a filter in it and it could be dirty. I will pull it out to take a look. Thanks again for your input.

bottle contamination will usually all come out as soon as you crack open the bottle and go directly into your filter inlet fitting or to your purge inlet fitting,
so by changing the bottle doesn't help you because the contaminated bottle already did the damage by clogging all your stuff up.its not that the nos in the contaminated bottle is bad its just that the bottle had a little junk in there that got passed on to your solenoids. make sure that you have inlet fittings with screens in them going to all of your nitrous solenoids that is an absolute must. if you don't have them nos supply should. another good idea to avoid this problem and catch it before it goes to your nos solenoid is to put in an inline nos filter nos supply should also stock those.

[66n2ocoupe]

Well the problem is solved. The nitrous solenoid oplunger was bad. I switched to the tephlon plunger, cleaned everything up and BAM instant horsepower again. Ran a new best ever 7.10@98 last night on a 125 shot. Thanks everyone for your help.:) :) :) :)