Ok first off, please do not answer to this thread if you are an uninformed jackass. I have a ZEX nitrous kit, purge kit, remote bottle opener, and spark plugs in the mail and it will be here on Thursday. I am going to be running the 55 shot for now and probably for a while til I get some other things taken care of. First off, I have been told by a couple people not to use the ZEX plugs because in high HP applications and at high rpms the electrodes poop out. Well I dont really think either of these cases are going to apply to me because Im only running a 55 shot and I drive an LS with a 6800 redline that I am going to stay safely away from when squeezing. What should I do? Use the plugs or get some colder NGKs? If I should get the NGKs, which ones should I get? Also, people have talked about the window switch by MSD. I checked into it and its gonna run approx $100 to add this after buying the pills and the unit. I know this is a good safety feature, but do I really need it or should I just not squeeze first gear and activate in 2nd to be safe? Ive read in some places that you should use teflon on all fittings, but today at a local auto parts store he said I didnt need to cause they are a certain kind of fitting that doesnt need it. What do you suggest. Ive read on the ZEX site that at 55 shot there is no need to retard timing but then it was suggested by somebody in the FI forum to do it, what have you done? Again, please dont post with stupid *** comments or thoughts, I am trying to get some solid answers so I would prefer them from people with knowledge and actual experience. Thanks for your time and sorry its such a long post. I know yur in a rage Chris but please dont lock this one.

 

I've been told by most people to just use the regular copper NGK's one step colder for a 50 shot and 2 steps colder for a 75+. As far as the window switch goes, it's a really nice thing to have. I know no one ever intends to hit their fuel cutoff, but it does happen sometimes when you aren't careful; well, if it happens while you're spraying...not good. It's better to be safe then sorry, $100 now or new block later. I would not advise spraying in first regardless of whether or not you have a window switch, it's going to be very difficult to get any kind of traction. And for the fittings, I don't really know, but again better to be safe then sorry...might as well ensure you don't have any leaks by teflon coating all the fittings. Timing, you don't have to retard for a 55 shot, but you can never be too safe...just two degrees should do it.

 

Ok well then it looks like Ill get the window switch. As for the plugs, on step colder is going to be enough or should I go two? And I will retard the timing by 2 degrees.

 

ZEX at 55 shot, stock plugs, STOCK timing.........

AN fittings DO NOT NEED teflon sealant.

BTW did I mention AC/Delco plugs?

 

plugs are fine , thats what i run , and im pushing more hp than that . . . .if not ngk has a good cold plug, i forget the part# though.
stock timing is fine .
they say to use teflon to seal them , but use paste if u need to . the tape will get in the and clog it up , but not really needed
you should be good to go .
watch out with that red line comment . . .. when spraying you get up there real quick hehehehe
good luck man . let us know how it goes.

 

ITR206, how long have you been using their plugs? So I should leave the timing and just run the zex plugs I bought then? Hey, if its good enough for an itr its good enough for my LS, lol. Whats your opinion on the window switch?

 

I was running with the same problem. I have the zex kit too ( not installed yet) and I was thinking of getting Denso Iridium Sparks. What do you guys think? By the way... does anyone know how to install the kit? I'm a 'do-it-your-self' type.

 

dont run with the iridium , i heard bad things . , , i think they are like platinum and platinum is baddddd. they ,melt and ?

i had my zex for a while now , at least since may or june . they are fine .
window swxes are cool , im gonna get one soon when i get time and money.
that way you arent limeted at open throttle to spray , you can set at rpm and spray at 3500 or whatever you want. . . its cool toy.
but yea man youll be fine . you wont even need to retard your ignition . . . . if you do decide to up the shot then get a dig 6 ignition from msd then preset the retard. . .. then you wont drive retarded all the time , only when spraying . . i tried it once and it kills performance biggggg time.

 

Ok so ive got a stupid question. With the window switch dont you still have to be at WOT in order to make the zex kit spray? Doesnt the window switch just make it so you cant spray unless you are at that particular rpm range?

 

iridiums are asking for trouble, not to mention throwing away $$. ngk coppers never go bad if changed regularly. The rule of thumb is one step colder for every +50 hp. But generally you can discount the first ~50 shot. A little bit of retard would be nice with a dry shot... but once again, not necessary. Basically I would only get new plugs and retard if you planned on occasionally pushing the 65 or 75 jets. Also, if you can't tune it perfect its been suggested that you use the fuel jet that corresponds w/ the next step shot higher. For example, w/ a 65 shot NOS use the 75 jet. This is only if you cant get it tuned by dyno or gauges, and if you don't mind running rich. Running rich is better than detonating rite? But once again its not really necessary on a 55 dry. Install on a dry kit is very straight forward. Do a search online.

 

I've had the ZEX kit for a while. Running a 65 shot on a 94 LS w/ 110+ miles. No problems yet. Copper NGK plugs (1 step colder) and premium gas, that's it.

Oh, and, I spray in first.


[Modified by ACIN, 2:39 PM 1/15/2002]

 

ACIN are you using a window switch? As far as the rest goes, I guess Ill use the ZEX plugs I ordered, leave the timing at stock, run premium like i always do, and just use the 55 fuel jet unless somebody thinks I should put the 65 in there. Im not planning on running it on a dyno, so should I be safe and run it rich? I realize this will make the shot a little weaker due to the added fuel, but Id rather be safe than sorry. Any other opinions on the plugs as to whether or not to use the ZEX or just NGKs?

 

Dude, what's all this about a fuel jet on a dry kit??? Did I miss something here?? I was reading, then all of a sudden the guy's asking what size fuel jet he should be using on his dry kit. I think everybody is just confusing this poor guy.

Geez man. Don't worry too much about your little 55 shot. That is so small, it couldn't even blow a sohc non-vtec motor(no offense to those guys). I even drove around with a 60-70 shot for like 8-9 months w/ ty compression in my 2nd cylinder, and it still didn't blow. Those single fogger kits aren't really that big of a deal. Not too much maintenance is involved with nitrous until you step to the direct port systems.

A window switch is not even necessary, just be very careful. I just got into the habit of not stomping into WOT until after 3000 rpm. The fuel cutoff of an LS is like 7200, so that's already like a safety precaution, since our redline is at like 6900 rpm, so just get into the habit of letting off at that. Then again, you have a newer one. I dont know if they changed that, just try it out sometime to be sure.

One thing I do recommend you getting is a bottle warmer. Just my opinion though.

Also, on the plugs, I just use the NGK coppers. I hear 50/50 good and bad about the zex plugs, I've never personally tried them. But I prefer the good ol' NGK coppers over any of the others. They do the job and they're damn cheap, 10 bucks a set. Can't go wrong with that.


[Modified by NOSed_b18b, 3:39 AM 1/16/2002]

 

Yeah I have been getting a little confused I guess. I was under the impression that there are some sort of jets that you swap in to provide additional fuel depending on what shot nozzle you are using. I dont even know, I think things will be a little more clear to me once I get all the stuff on Thursday and see what is all in there. Thanks for the help guys, any more input is appreciated.

 

Hey everybody Teken referred to nitrous as "Nos" haha. Sorry, jk Teken dont smack me, or decrease my user rating, lol. Ok, I was just sitting here doing some reading and I think I figured out that i was a stupid dummy about the whole fuel jet thing. Im thinking people were referring to wet setups when talking about that, so I got it now, I dont know wtf I was thinking, long days at work make me think stupidly.

 

lol, can I interest you in an APR wing and some underbody neon to go along with that nozzzz Teken? haha

 

fuel jet...........


ZEX uses it as a restrictor orfice. ZEX uses some of the bottle pressure to boost fuel pressure to apply pressure on the FPR. By using a smaller jet, less goes into the vacuum port on the intake and more onto the FPR.

Be safe and use the 65 fuel jet when using 55 nos on ZEX kit.
Richer is safer!

BTW SOHC non-VTEC blown after 2nd bottle......




Can't spary a 1.5L for long.


[Modified by Mista Bone, 6:09 AM 1/16/2002]

 

I've been reading all of this info on the Zex kit, and I was wondering what advice you have if I were to throw it into my GSR with i/h/e & cam gears. Oh yeah, it's almost at 100k miles now too. The advice being when to squeeze, what gear, and what about squeezing near redline.

 

squeeze above 3000 rpm, what ever gear you choose. Limit runs to 15 seconds (no all out high speed runs on NOS!) or less.

About the redline issue. I had my ECU rechipped via Locash Racing. I went from 7200 rpm fuel cut to 8500 rpm fuel cut. I also run a MSD 6AL with a 7600 or 7800 rpm revlimter chip. That way I will cut the ignition WAY before fuel cut can kick in. N.O.S. makes a rpm window switch. With a GSR motor I would set it at 3000 or 3500 on low end and 7800-8000 on high end.

BTW if you desire a high speed run, choose a SAFE location. Run up without the spray till in 5th gear, the arm the nos. Speedain, anything gonna hurt at 100+ mph. I have done 140+ with a SOHC Z6 on spray. Ever since that day, I've not been in the triple digits.

 

mistabone,
you seem to be pretty informed about the different type of window activiated switches. Would you mind also filling us in alittle? What switch provides the safest options? Which unit is easiest to unstall? How bout price???

Thanks

 

I see. Zex uses a "fuel jet" to regulate some amount of vacuum to the fuel regulator eh?? Pretty worthless if you ask me. On the NOS dry kits, it's just a straight vacuum line. No so called "fuel jets" used; so you'll always run rich on the bottle. I appreciate the knowledge given to appease my ignorance on this product.

 

when ZEX kit is on, is sends NOS pressure to the FPR to boost fuel pressure. The jet regulates how much the pressure it raised. NOS kit does same thing, but with the bleed jet. That is way the NOS 5122 kit always runs rich as crap.

 

MSD makes a window switch for about $75.
Only rated for 1.5 amps so you'll need to use a Bosch style relay.