i was talking to SX7R awhile back and he reccommended a zex kit. anyone else have any thoughts?


Trevor

 

Really I can only vouch for NOS brand since that's all I have. Really, to be honest other than quality of the products, I have seen no big comments about differences.

I know some people swear by one or the other. If you think about it though, neither NOS nor NX makes the gas nitrous, so really if you have your system properly installed, you will get results. Which one lasts longer or easier to put in??? The jury is still out.

To answer your question; safest=dry, easiest to use= either. Any nitrous system is really activated by a combo of switches, no matter what KIND they are. You just activate it, nail the gas, and you're up and running. Pretty simple really.

 

From what I've found it seems to me that the Nitrous Express kit is safer and more effective because you don't have to tune it like you would with a dry kit. From what I've heard the only rumors about a wet kit not being safe actually came from the company NOS since they couldn't design a wet kit for our cars that worked properly all the time.

 

From what i have heard NX because it is a wet kit.

 

the only thing steering me away from a wet kit is what i know...
- it is direct port which requires tapping my manifold.
(i dont really want to do this because it is a more permanent setup and wont it leave holes when i try to sell the car without the kit?
- it is more expensive.
- it requires more upgrades right away
(i wanted to use a 50shot for the time being because i dont have the extra cash that i'll need for a new fuel pump, gauges, fpr, etc.


if any of this is wrong PLEASE correct me as i am quite ignorant when it comes to nitrous

Thanks!

Trevor

 

Dry kit is your way to go then

 

thats what i figured. maybe once i get my VI and i have my old manifold laying around i will tap it for direct port

 

Wise young grasshoppa

 

 

I know the Zex kit in and out and am happy with the ease of install and operation is very straight forward.

I would estimate it is a great way to run nitrous safely until you feel more comfortable to move up to some of the more involved.

The kit I have is set at a 65 shot right now and I may switch to 75 jets for the track meet coming up this weekend.

 

There is a single fogger wet kit made by NX, it's what Jime uses. I'm still debating whether or not to go DPI or just use the single fogger wet nozzle I have laying on my table. I want the DPI for looks mostly, but wouldn't use it much at all since the smallest I could run is like an 80 shot, and that's probably too much for the stock motor since the car is SC'd also. So I'll most likely end up using the single fogger I've got now and run a 35 or 50 shot with it.

 

Im also running a Zex kit and like it alot...the ease of instillation is great and more straight foward then a NOS kit (even though this is my biased opinion). The way the system is set up is that the management unit will not release the nitrous until it has an adequate amount of fuel so this by itself means its a safe kit to own..Although alot of people say the zex kit only has one solenoid compared to other companies products using more, i havent heard any complaints about it what so ever. Another high point i saw with the kit is that it taps directly into your Throttle Positioning Sensor and learns the power curve at WOT, this is also alot easier and more accurate than rigging up a WOT switch like NOS does. Like i said before these are my own opinions on a product that i have in my max and i cant speak for other systems out there...But if your thinking zex its a great choice..

Good luck,

Jon

 

The Wet NX kit install almost exactly the same as the NOS dry kit with the exception of having fuel going to the nozzle as well. It is just as easy to install, safer and no tuning required like NOS.

You do not have to go DP and I would not recommend it because of the complexity of install and tuning.

The NX kit can be run at a higher shot than NOS without requiring any upgrades at all because it uses stock fuel pressure.

There was just a recent group buy that had the NX import kit for $450 so the cost is not prohibitive.

My Son installed the NX DP kit the same time as I installed my NX Wet and after comparing he was convinced that he should have gone with my kit instead.

Zex is probably a little safer than NOS but its still a dry setup and after running both systems on my car I prefer wet because I feel it is safer, no bumping up the fuel pressure, no tuning required, just put in the jets for your fuel pressure and away you go.

 

As some people have stated, I will clarify a little:

Wet setup does not always mean Direct port. Wet just means that the nozzle (whether 1 or 6) shoots both nitrous and fuel at the same time. You can have a wet setup with a single nozzle (as Shadow was saying) or you can go all out and step up to the Direct port which has 6 nozzles (1 for each cylinder).

Dry setup has only 1 nozzle and it only shoots nitrous out of it. The additional fuel needed to work comes from the stock injectors. The stock FPR is tricked into pumping more fuel in when the system is activated and engaged (hence the suggestion of bigger fuel pumps for bigger shots).

Both have advantages over the other. Dry is usually limited to 100 shot (to stay safe), where Wet can go to 150. Dry is easier to tune, wet is safer once tuned. Both are easy to install.

Pick your poison....

 

Jeff...you do know that you have to run two separate fuel system if you are going to use a wet kit + SC. At WOT, the SC will raise the fuel pressure according to amount of boost. This will totally screw up the nitrous/fuel mixture for the nitrous nozzle. I believe you need to run another fuel pump and regulator just for the nitrous.

 

Why would he? DPI has all the advantage of the NX wet manifold kit and more. Tuning is the same procedure. Match up the correct fuel jet and nitrous jet. DPI evenly distributes the nitrous/fuel mixture to all cylinders. NX wet manifold kit can't. With DPI, the nitrous/fuel mixture takes less time to get into the combustion chamber. NX wet manifold kit has to travel through the TB, then all the upper intake manifold.

 

I do agree that the DP has a little better distribution but unless you are running higher than a 150 shot its really not advantageous.

Tuning is not the same. There is NO tuning required for a NX wet kit. With the DP you require a separate FPR that will run at less than 15 psi and you have to analyze the shot with that fuel pressure to calculate fuel and nitrous jet sizes for each cylinder. You also have about 15 zillion places where it can leak. Install is a biatch with DP and so is tuning.

The reason he said that he would sooner have the Wet is because of all the BS included with the install and tuning. Once that is done the DP is ok but if you have ever installed and tuned one then you know how much effort is involved. I don't think I have hear the F work spoken so frequently.

Another reason too is that we both bracket race and sometimes you want to down size the shot depending on certain conditions etc. On the wet system its two jets, on the DP its 12 and takes considerably longer, time at a race is not always at a premium.

 

What kind of car does he have? Is it carbureted? I run my DPI with OEM fuel pressure and OEM FPR. NX do provide better information on matching up the correct jets. NOS information is not as accurate. I do agree that it takes more money and time to change jets. With DPI, it takes me about 20 mins to swap out the jets. Those little jets aren't cheap from NOS either

 

He installed in on a VR6 so same setup as the Max. NX Direct Port runs at about 10 psi. Can't run without an aftermarket FPR and has to be calibrated very carefully. Can't use a SARD or comparable either because they won't regulate that low. He is fully sponsored by NX so he got the calibration kit etc free. Also had to get them to send up a flaring tool for SS as well because the regular ones are useless except for copper. All in all it wasn't easy compared to mine.

This is a pic of the plumbing.

 

That setup looks messy. I think i will stick with the regular NX kit.

 

I am running the NX wet kit i am debating wether ot not i want to do direct port instead. It does look a lot nicer. I have to admit being that i used both the nos and nx i have to say that the i like the nx better works well for me. Brian

 

It is messy and a lot of work to boot. Not for the feint at heart. 12 lines to cut, bend and flare. Also have to take off the intake manifold to drill and tap, its not a 2 or 3 hour job like the NX wet and NOS dry install is.

 

so let me get this straight....
-i can get the wet kit and not have to buy a fpr and high flow pump?
-i dont have to go through the process of adjusting fuel pressures after test runs and checking my plugs?
-i can run higher than a 50 shot without the high flow pump and fpr?
how hard is the install?
and if all this is true....why would anyone use anything else?
thanks a bunch guys.... my knowledge on N20 have tripled since i first saw the new forum yesterday...


Trevor

 

Search Jime's threads about the NX system. He provides a lot of very good comments and details. The kit is overall pretty easy to install as long as you do everything right and it comes with directions. Just make sure you dont have leaks and the system is activating. We went through a long stressful process with ejj's NOS system for a few days because he couldn't get it to work but hopefully the NX kit wont' have those problems.

 

Almost to a point.

1. You do not need an fpr because NX runs stock fuel pressure.

2. You will need a high flow pump, (not high pressure) if you exceed a 75 shot, up to that you should be ok depending on the stock pump.

3. No adjustments, just put in the jets recommended for the shot for the Max, it has been bench tested for proper air/fuel at the specific fuel pressure we run, ie 43 psi at WOT. I have tried every shot from 35 to 150.

4. Install is almost exactly the same as for NOS except you have to connect a fuel line to the nozzle as well. If you install a low fuel pressure cutoff switch then you are already 1/2 way there.

5. I had a NOS kit first then got the NX and there is no comparison, especially to quality and output. I ran a 13.6 with a 75 shot NX and 13.8 with a 100 shot NOS. My understanding is NOS is crank HP and NX is WHP, hence the difference.

DON'T BUY ANYTHING ELSE, ESPECIALLY NOW THAT YOU CAN GET NX FOR UNDER $500. They should give me a commission.

 

you guys have me all excited for this now. i WAS going to get the VI first but after seeing 2 of my friends not improve at all at the track i have kinda shyed away from that for now. i want something that will make a significant difference. im tired of being in the high 14s. if you can run a 13.6 in an automatic than i should be able to do the same if not better in my 5speed with a 75shot. i guess i better start saving up my pennies


Trevor

p.s. thank you very much! you have opened new doors for me.

 

NOS<NX can any of you guys running NOS hit high 12's with a 100shot or a 13.03 75shot. I know someone who has already with an NX kit but he doesn't want to share his setup. It looks really simple said it cost him a little over 680.00 total.

 

Honestly, I've seen both setups installed. I think some people are correct in feeling like the components in the NX kit are a little more higher quality manufactured. The solenoids look a little beefier, maybe some of the connections look a little more pro that are included in the kit. FYI, I have NOS kit, so it pains me to say that....jk.

With that said, the performance differences probably come from one of two sources; Installation, Nozzle design. If you take any kit and install it hap hazard, don't make good electrical connections, use weak switches, etc. You will have problems due to your sloppy install and not necessarily the equipment.

The nozzle variable is a biggie, but honestly not proven too reliably. If someone ran X with one kit, then switched and ran Y, it's hard to just attribute the better/worse to just the system. I know Jime has done this and I know he's probably gonna differ from my opinion. He is a dedicated racer and I could attribute his better numbers to age...I mean experience...and track conditions. I don't know, maybe NX does have better nozzles. Really, that would be the only real difference that could cause performance gains.

 

I agree, installation and experience is key. I also agree that, hands down the NX kit, quality and design wise, is a better kit.
I'm not 100% sure, but I don't think there's gonna be a major difference in performace as far as the two kits go.

During the beginning of the season, I started off with a 40shot dry and ran 14.1's consistantly. As time went on and I started to feel more comfortable with the setup, I bumped it up to a 50shot and ran 13.9's. Towards the latter half of the season, I went with a 60shot and ran 13.8's consistantly. I ran a 13.7 three times and a 13.6 twice. This is w/out slicks, radials or a window switch, just your basic NOS dry kit(5124) and a bottle heater.

All in all, I refuse to believe that one kit is better than the other as far a performance goes. Safety and system use is a whole nother story. I'm sure NX is a lot more user friendly than NOS, but then again I personally haven't experienced any problems. Just my humble opinion......

 

The reason NX pulls higher HP is because it is rated in WHP not Crank HP like NOS. I do believe the NX is higher quality but the main reason I like it is because its a WET system. I did compare both systems in the same car, same setup, the NX is much stronger using the same shot. NX guarantees their HP to be within 5%. You don't even need to go to the track to tell the difference it is very obvious. I knocked .5 seconds off my car running a 100 shot NX compared to NOS thats a huge difference.

You don't trick the FPR into running mega high fuel pressure and risk the chance of locking up injectors. It runs at stock fuel pressure and I believe it makes it much safer for the engine and doesn't require a High Pressure fuel pump. You do need more flow if you are going to go above a 75 shot but its still easier and safer running stock fuel pressure.

I also like NX's support and the fact that they have a lifetime guarantee on their solenoids and will in fact rebuild them for you free every year if you want for the price of postage.

 

OK, I think I see it through your eyes now. And with the price at what it is right now, it be crazy not to upgrade....
Really, the only thing that kept me from spraying above a 60shot is my FP and FPR. I don't have nor wanna spend the extra money on a new FP or regulator for that matter.

 

If I was to get a nitrous I wouls get the NX with the shark port cause all you need to do is tap into your intake. How would nitrous do with an auto.

 

Check my signature. (Woops we have no signatures anymore.) Mine did very low 13's with less than $1500 in mods.

 

same outcome sorta with a different car. my g/f's accord with her old accord motor ran low 17s. with a 50shot of NX..she was in the mid 15s all day.

right now im waiting on the new kit NX is going to offer. it replaces the fuel rail, and requires no drilling....one step above Direct port. so far they only plan on having a kit for the b16a honda motor.

 

that's one expensive kit!

 

How's that one step ABOVE direct port?

 

Wouldn't it do the exact same thing, just without the drilling?
It's a tiny, tiny bit closer to the cylinder since it sprays right with the injector, but I don't think that would make any difference performance or safetywise. Just much easier to install. It's even got these cool flexible nitrous lines instead of the steel tubing.

 

it doesnt require drilling. i didnt want to drill my manifold in the first place..but **** it..i did anyway..

 

That would only make it better if you are looking into the trade-in value down the road. I'm with Shadow, it may be a looks thing or a sneaky thing (in the sense you don't want anyone to know you've got it), but it's not going to offer any performance gains over traditional DPI. It is going to make a clean install easier for the masses since you don't have to bend/tap hard lines, so there's an asthetic advantage. I still wouldn't call it a step ABOVE DPI, maybe another option.

 

thats cool. but here in cali, having a DP kit when it comes down to a smog ref, isnt the greatest thing...