well i got a good deal on a zex kit out of a 2000 mustang. and well, im gonna make it work in my TBI camaro.

first question, where do i splice my tps wire from the control box? and second, i have the intake and regulator tubes T'd into one tube, where do i T this into?

also, could i just stick the fogger into my open aire element? or should i wait until i get a tbi nitrous plate?

thanks for any help!

Well, to start with, that thing is setup to work with roughly 40psi fuel pressure, you're car is probably running around 10psi… you'll need completely different fuel jetting (does the zex setup even have jets? I haven't actually had one in my hands)…

it is a dry kit...

it has a single nozzle if thats what you mean, with an 85shot tip on it.

I wouldn't feel safe running a dry kit on TBI. You should sell that kit and buy a holley TBI nitrous kit. It would be much easier to run a wet system with a plate. Safer to.

well too late im gonna make it work

im gonna buy the plate and hook it up.

just answer my quesiton if you can, i have the intake and regulator hose, T'd into one, but where do i T this one hose into?

OK, one more try and then I'll just let you blow your **** up however you want.

The zex kit is setup to add fuel to a car that uses a vacuum referenced FPR by applying pressure to the back of the diaphragm and forcing the fuel pressure to shoot up.

On your TBI car you do not have a vacuum referenced FPR, and even if you gutted the fuel metering body in the TB and added an external FPR, your fuel pressure is much lower then that setup is designed to work with anyway.

You want to "make" it work… open the box, splice into the wires that open the internal N2O solenoid and wire them to someone else's fuel solenoid, figure out the appropriate jetting and either how to mount a nozzle to spray down both bores or a plate that will work…

I bet that by the time you get all the pieces to work you'll have spent enough money to just buy a more appropriate N2O setup used.

Somebody with a clue could make this work 2 or 3 different ways, but someone with a clue would ditch it and save themselves the hassle and the money and use a more conventional setup.

well all i need to figure out now is how to run this tube? lets say if i didnt connect the hose to anywhere, and everything else was setup (wiring, nitrous plate, etc) and i used the nitrous because it is ment to run off of WOT, what would happen? would the nitrous inject?

You get no extra fuel. BOOM!

well im gonna call the dude i bought it from and see what he says. but if i blow it up, no big loss right? its only an l03. lol

just a reason to buy another 305 !

alright dude, blow up your motor, and then you'll be asking us how to replace it.

as crossfire has been trying to tell you, extra fuel isn't going to get injected along with the nitrous!!!
which means when you hit the nitrous your motor is going to be LEAN............
which is the opposite of good, esspecially with nitrous.
in other words you'll be saying " (BOOM) .....Hey guys, was that sound a connecting rod shooting through my oil pan?"

If it were me, i would keep the bottle, the bottle braket, and the AN nitrous line from the bottle to the solenoid. then buy a spray bar & solenoid kit (minus the bottle) from your local speed shop.

it would probably run you about $280 (i'm guessing).

FUEL would get injected with the nitrous, NO lean, NO boom.

I really suggest you do some more reading on nitrous, because your a blown engine waiting to happen.

They should really require an exam before selling nitrous kits.

well i have asked questions but got no answers. believe me im trying to learn as much as i can, i got this full kit for 300 bucks so i went ahead and bought it.

ok so is it possible to buy the parts i need for a TBI application? i know nos sells tbi specific nitrous for our cars, but i cant seem to find a parts listing or how it is set up so i can go ahead and order what i need. wanna help ?

Sell it to a mustang guy and buy a TBI kit. It is like 4XX$ but it will be the right kit.

It will be much easier to install and much safer.

well i really only need a couple things here i believe..

the injector plate which is about 85 bucks.

the only thing i need to figure out is how nos does their TBI application, and i would need their fuel solenoid and call it good right?

heres the plate i need

http://www.jegs.com/cgi-bin/ncommerc...75&prmenbr=361 (spread bore)

and this is the fuel solenoid i would need

http://www.partsamerica.com/PartDeta...goryCode=4009V



now if i bought those two things, about 160 bucks , i would just need to figure how to wire it into the zex system ?

don't ask questions and expect answers,

ask questions to your self, and search for the answers.

as for the zex setup... you need more than just the fuel solenoid, you also need the fittings and the lines.

and don't forget the correct size jets.

well i know i need lines and fittings, but thats a minimal cost..

i just need to learn how i would make the zex work with the nos fuel solenoid to deliver fuel as well as nitrous into the tbi spread bore

also i know it is possible to make your fuel pressure adjustable on the TBI, if i did that mod and adjusted it for high pressure, would the engine still run lean?

i could adjust it high pressure for the racing and when i dont plan to use it, set the pressure back down?

i just realized something.

i remember that i read that the computer will adjust to keep a 14.7:1 air/fuel ratio, so if i got a big shot of air all of a sudden, wouldnt the computer automatically inject more fuel?

no, no, and no.

TBI fuel injectors were made to run at about 16psi or so.

a multi-port system(such as the one that kit was designed for runs at about 45psi. big difference. so thats a big "no" on the AFPR.

and as for the computer sensing the 14.7 fuel ratio.

the computer does take readings from the oxygen sensor and does try to acheive a 14.7 air/fuel ratio, but only in CLOSED LOOP.

once the computer senses enough load, or that the throttle is open too much (i.e. wide open throttle) the computer kicks back into open loop, where it doesn't take readings and try to acheive a 14.7 A/F ratio. instead, it adjusts the amount of fuel based engine load, and preset levels. and 14.7 is way LEAN when your at WOT.
a good WOT A/F is about 12.5

So you need some other way of providing extra fuel when you hit the nitrous, the ZEX system does it by boosting the fuel pressure, which in turn injects more fuel through the injectors.

thats not an option for you, because you don't have a vacuum-reference FPR.

your going to have to add a fuel solenoid and figure out from one of the other manufactures what size jetting to use.

If it were me, i would sell the kit on ebay, they are going for like $300. and then spend the extra 80 to get a kit that will work right on your car.

Nitrous is great, but a wouldn't trust a hacked up system.

well i see this as a challenge, and im having fun learning all this as we go along, and if it works in the end, i see a tech article maybe.. lol


on the zex website it says they are self regulating and adjusts fuel pressure accordingly, does this mean anything?

Check your PM. You can make that kit work with a switch , relay , fuel solieniod , bottle heater , and tbi plate , plus braided nos an lines and jets. I'll let you crunch the numbers to justify not buying a 5153 kit and trying to resell your zex kit , but if you want anwsers to run it like you do I told you how in PM.
Start out with 32 26 jets like the pdf shows for v6.
http://www.holley.com/TechDocs/Instr...A5153-SNOS.pdf

you mean 36/26 jets right?

I dont mean to mess with your post. but what exactly is wrong with doing it right?

why piece together something so risky and bothersome when you can have a lab tested correct for your car kit?

Please dont tell me its about money because I know you got it for $300 but those zex kits are pricy and the import pilots would buy it right from you also the mustangers. then you could get the "right stuff"

btw the plate you showed is for carb not for TBI. there is a TBI specific kit that was actually made for trucks but the camaros employ the same hardware.


what you need is either the:

NOS part # 05153

or

the nitrous works one

ok here is a diagram i made that looks like will work once i get the nos fuel solenoid.

how does this look to you all?

i think this will be a fun project, and for the parts cost, should come out to about the same as a new kit if not a tad cheaper, 80 bux for the plate and 70 for the solenoid.

plus/minus 20 bux for the extra line for fuel feed

i was informed that the spread bore carb plate would work just fine, and its a hell of alot cheaper.

you have holley projection? or a stock TBI unit? because unless you have swithched intakes and used an adapter to put your TBI unit onto a carb intake then that is different otherwise whomever told you that is very mistaken.

here is what the plate made to fit the bottom of your TBI looks like, do you still think a huge sbreadbore will do it?

A spread bore carb plate WILL NOT work if you have a TBI manifold. Now if you have a carb manifold with a TBI adapter plate it would work fine. However I am under the impression you have a TBI intake. In which case a spread bore carb plate WILL NOT work. I repeat IT WILL NOT WORK.

I bet money you could easily sell that ZEX kit for 350$ and then save a little and but NOS-5153 kit and have everything ready to go.

Putting something together like your doing is for experienced nitrous experts who are custom building something to make the most power. But for you (and me) a kit made for our application is a much much better idea.

i was thinking of using a spread-bore plate on an aftermarket 4-barrel manifold

b4c is right, no dice with the spread bore plate, your going to have to get a tbi- plate

its stock, guess they were wrong.

those tbi plates are pricey though :S

wheres a good place to pick those up anyways?

how does a 6" x 6 " 4 bolt open 4bbl square carburator plate fit under a 2" x 4" 3 bolt closed 2bbl triangle TBI unit on a TBI intake with out the TBI to carb intake adapter and the carb intake?

http://www.holley.com/HiOctn/ProdLin...f13429NOS.html

their are a few reasons why i would rather keep this kit instead of selling it and buying the NOS kit.

1. i can hide it all in the zex control box.

2. it sounds like a fun project to put this together myself.

3. the automatic injection of nitrous at WOT is really cool

4. no hassle with selling this kit. i live in a small town and not many people could afford this kit.

i mainly want to do this for myself and for fun. i like puting things together myself, and this would be a nice project. so if you want to offer advice and brains with my project, i more then welcome it!

so basically, after anyone checks out my above diagram, it looks like im gonna need to purchase the proshot fuel solenoid, 2 1/8"(3AN) fuel lines, a T-ftting for the fuel line, the TBI injector plate.

and some custom wiring work to make the fuel solenoid turn on the same time the switch is armed.


one question i do have though. if i turn on the arming switch, is the fuel solenoid automatically gonna start injecting the extra fuel before i even go WOT to activate the nitrous?

Holy crap… somebody please shoot this thread in the head!

Man, do whatever you want… just try it. I told you exactly what you needed to do to make it work at the beginning. You apparently can't or won't listen.

Challenge my ***… the challenge is how much of the little bits of the engine that you'll have left can you carry home in a 5 gallon bucket. Just do us all a favor and when you do, please post the "how do I replace my engine" on some other board.

dont get offensive man. this is just a project for me now.

i did take your advice and that is why i am gonna turn this into a wet kit, i plan to remove the intake/regulator system in the zex control box, replace it with a nos fuel solenoid, tap the fuel line and with a tbi injector plate, create a wet kit. i will run the solenoid to the zex computer so it kicks on when the nitrous does or when i hit the switch (not sure how it works yet to have a final decision) and i will have a small 50shot in the tbi injector plate for starters, using the nos 36/26 nitrous/fuel jets .

dont get mad though. their is no reason to

You run the fuel and nitrous soleniods on the same hotwire so they are armed together. Then you can use a WOT switch also so when you go WOT the circuit is completed and both fuel and nitrous are sprayed into the engine.

I plan on running a switch inside the car that I can turn on and off and also run a WOT switch. That way I can break the circuit with the switch so everytime I go WOT I don't spray.

BTW have fun with the project and you mid as well look for another 305 like you said....why the hell would you get another 305 though?

why i would get another 305 is a different subject. lets stay on nitrous

i dont understand why i would have to look for another engine if im running a 50-100 shot

So does that purple box contain a nitrous solenoid and it opens when wot? If so for a cobled kit it could work. Yeah 36 26 that will give you a 50 shot on a tbi kit.

yes, you are correct, theirs a nitrous solenoid that opens at wot, and also some kind of vaccum solenoid thats supposed to raise the fuel pressure since its a dry system, but i figure once i take that out, their will be plenty of room for the nos fuel solenoid..

and in the end, i have a zex/nos kit

Sweet man , hey I dont know if you EBAY but Thoose tbi plates come up on there as do solienoids and an lines. BTW Lowes has brass Army Navy (AN) flare fittings . Good luck with it , dont forget that bottle heater Some people might say you can buy heaters at home depot but if you heat it you know just buy a heat kit from NOS etc.

DP

Oh yeah get the two solenoids to open in series. I assume you know that has to happen. If for any reason the zex kit couldnt do that a nos micro switch is a few bucks and will get the job done with a relay.

can you overlook this picture i posted a few posts up, does this look like its gonna be the way i set this up, and thanks for your support, i do use ebay however last time i did i got ripped off and now im sketchy about it..


also, i know the tbi plate is on the pricey side, so i wonder is their an alternative i can do to hold me over until then?
i hear some people drill holes in the ring around the TBI, would that be ok even with only one nitrous and one fuel line?

Well for the most part that drawing could work as long as the two solenoid grounds are together and the two power wires are together so they "click" open in series. I am not familiar with a zex circut. But like I said if it doesnt work in series just run it like the pdf 5153 file shows with a micro switch and a relay + the arming switch.

With regard to the tbi plate if you do get one , the nos holes spray down and the fuel holes in the lower bar spray "up". Thing is with the 5153 kit and all other nitrous kits on a stock tbi engine is that the dual plane manifold is kinda a nightmare to equal distribution. That makes it hard to run anything other than a plate , see because a soft plume or regular wet nozzle is going to spray down the manifold and only hit one bank. Really you have no other choice if you dont run a single plane manifold.

hey i realize you want to do this just cause it sounds fun, and you can prove something to yourself, but trust the experts... its not going to run right! and you gonna have $500 into it easily! you could probably buy a used kit for about the same price you could sell this one for, and it would work right.... if you jsut want a project so you can prove somethign to yourself buy the correct kit, and then turn it into a two stage kit thats 75 + 75. also as far as the full throttle switch every kit has one of those... the zex is cool how it uses TPS voltage, instead of being mechanical, but still does the same function as the $10-15 switch... lastly if you are 100% dead set on having just a project then i might be willing to trade you for my kit (i'll trade if i can sell yours for a profit)...its an edlebrock 100 HP kit for carbed cars.. with WOT switch!!!!!... but anyways to convert it all you'd need is a fogger nozzle $30 and fuel solenoids $20 if that...
then just screw the fogger nozzle into the top if your TBI lid and have it shoot straight into the top of the TB (must use straight shooting fogger nozzle)

i dont know if this would be cost-satisfactory, but could i T both the fuel and notrous lines so i have to lines running to each Bore?

hey stevedave454, if its for a carb'd car, then i would need the TBI plate still, and i would still need the fuel solenoid, and a nozzle. so it wouldnt be a good deal, also be bad cuz of shipping cost.

im not sure if your familiar with TBI units, but i realyl couldnt spray it top down.

No , see Im running it through my head for you and it just is to unsafe and unrealistic to run it that way. I say that because how can you ensure equal amounts of nitrous /fuel mixture is introduced into each plane of the manifold. I understand you want to get it on there cheap and have fun with it , but belive me with a tbi its a little bit tricker than a mpfi which has thoose nice plenums and intake tubes with single bore tb's.

Only other option is just as expensive if not way more than a plate unless you have them on hand and that is a tbi blower hat , std nos wet nozzle jet in a cai style tube.

Bite the bullet and either resell the kit before you hack it , or buy the 5153 plate and the other stuff.

do you know the cheapest place to buy the plate? i can only find them for about 200+ bux

plus the 60 dollar fuel solenoid.

how would i cut into the fuel line, i know the fuel line can be disconnected over the passenger side valve cover. do you know which T fitting i wuold need so i can run a line to the solenoid?

the solenoid is a 1/8" in/out let but im not sure what size our fuel lines are.

omg i got a great idea to bypass the tbi plate.. let me go photochop this and post it lol!!

im gonna blow something up haha

check this out. needs some fine tuning as which size T's i would need and where the flare jets fit (either the nozzle fogger or the T fitting)

but would this work if i drilled holes into the tbi ring for the tubes and ran the fogger so it sprayed down into each bore?

i think that would be a cool custom setup and save me about 100 bux off the TBI plate price..

I don't know if you meant this by the winky, but the flair fittings are cut with a 45* seat, where AN fittings are cut with a 37.5* seat. They'll seal sometimes, won't others, but do pretty much ruin the fittings when you mix and match.