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Discussion Starter #1
Hi everyone. I have been researching for about a week and a half now and it seems like everyone seems to like the Zex dry nitrous kit. So i have decided that i will most likely get the Zex unless someone convinces me otherwise.

However, my question is can i run a smaller shot such as 50 with this kit (seems as though most are running a 75+)?

Also i have heard that a "nitrous tune" chip is some good insurance... who should i get this chip from? Lonnie?

And with a 50 shot do i need to upgrade my fuel system, as i have heard that getting injectors can actually confuse the Zex computer program from compensating for bottle pressure?

And my final question is there anything i am missing in this list? 1. Zex dry nitrous kit, 2. Bottle heater, 3. nitrous tuned chip?...

Thanks so much! I just dont wanna blow my motor (125K on it).
 

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However, my question is can i run a smaller shot such as 50 with this kit (seems as though most are running a 75+)?
i am currently running a 50 shot with my zex kit because i don't have a nitrous tune on my chip. I'll look around, i have the pill sizes that zex gave me.

And with a 50 shot do i need to upgrade my fuel system, as i have heard that getting injectors can actually confuse the Zex computer program from compensating for bottle pressure?
for a 50 shot you probably don't need to upgrade your fuel system, but it is cheap insurance. definitely upgrade if you plan to run a higher hp shot (have never heard of upgrading the injectors though).

And my final question is there anything i am missing in this list? 1. Zex dry nitrous kit, 2. Bottle heater, 3. nitrous tuned chip?...
a bottle blanket and a bottle pressure gauge are both nice to have (summit or jegs brand work perfect and are way cheaper than the brand name ones).
 

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I am in the middle of researching the same upgrade, and the ZEX DRY kit seems to be the best option and the one most recommended. It seems to me that it starts at a 75 shot now. Not sure if you are able to change and lower to a 50. I emailed ZEX with some questions, but they dont seem to be too interested in responding. A few in TCCOA have these on their cars. Use them like rented mules as a resource. Good luck and I will post any new info I come across.
 

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ok, found the info to run the 55hp shot (strait from zex). you'll need either a 49, or 50 jet for the fuel (cant remember which one i used) and a 32 jet for the nitrous. also here is the info for running a 65hp shot. 46 jet for fuel, and either a 35 or 36 jet on the nitrous. hope this helps ya out.

edit: you can buy the jets on ehey
 

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Discussion Starter #5
FordFanatic said:
ok, found the info to run the 55hp shot (strait from zex). you'll need either a 49, or 50 jet for the fuel (cant remember which one i used) and a 32 jet for the nitrous. also here is the info for running a 65hp shot. 46 jet for fuel, and either a 35 or 36 jet on the nitrous. hope this helps ya out.

edit: you can buy the jets on ehey
Cool thanks alot for the pill information! But when u say upgrading the fuel system is cheap insurance, what does something like this include? And is this difficult for a weekend mechanic to do? And just one more, with your 50 shot how much of a gain did u get from it (hp and 1/4 mile). Thanks again bro
 

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a high flow fuel pump and an adjustable fuel pressure regulator. can all be done with basic hand tools in your driveway.

with all my mods (gears, chip, underdrives, maf, j-mod) i was running a best of 15.3 na, with the 50 shot i ran a best of 14.2. couldnt tell you about the hp, never had it on a dyno.
 

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Discussion Starter #7
FordFanatic said:
a high flow fuel pump and an adjustable fuel pressure regulator. can all be done with basic hand tools in your driveway.

with all my mods (gears, chip, underdrives, maf, j-mod) i was running a best of 15.3 na, with the 50 shot i ran a best of 14.2. couldnt tell you about the hp, never had it on a dyno.
Okay sounds good. Thanks alot!
 

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FordFanatic said:
ok, found the info to run the 55hp shot (strait from zex). you'll need either a 49, or 50 jet for the fuel (cant remember which one i used) and a 32 jet for the nitrous. also here is the info for running a 65hp shot. 46 jet for fuel, and either a 35 or 36 jet on the nitrous. hope this helps ya out.

edit: you can buy the jets on ehey

I don't think so. Those jet sizes aren't even close!!!!! Each step up should be more nitrous and leaner on fuel.

The 55 HP should be in the Nitrous 32-Fuel 36, 65 HP shot nitrous 35 - Fuel 34. The updated 75 -100-125 shot are Slightly different than before. The 100 shot is Nitrous 46 - Fuel 40, and the 125 Nitrous 54 - Fuel 34. That is based on a ZEX dry kit, 4.6L with 19Lb injectors.

The 55-65-75 shot jets may vary somewhat but I can guarantee you they are close to what the initial jets were. This came straight from my packet years ago that I have in front of me.

Make sure you are getting the correct information for the correct system. If its a new system it should have the information in the packet.
 

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Discussion Starter #9
1MTNCAT said:
I don't think so. Those jet sizes aren't even close!!!!! Each step up should be more nitrous and leaner on fuel.

The 55 HP should be in the Nitrous 32-Fuel 36, 65 HP shot nitrous 35 - Fuel 34. The updated 75 -100-125 shot are Slightly different than before. The 100 shot is Nitrous 46 - Fuel 40, and the 125 Nitrous 54 - Fuel 34. That is based on a ZEX dry kit, 4.6L with 19Lb injectors.

The 55-65-75 shot jets may vary somewhat but I can guarantee you they are close to what the initial jets were. This came straight from my packet years ago that I have in front of me.

Make sure you are getting the correct information for the correct system. If its a new system it should have the information in the packet.
Wow it seems as though you really know alot about nitrous. I think when the time comes i'll just call Zex just to make sure... Not that i dont believe or appreciate what you just said but it's a just in case thing i suppose... But uhmm i was wondering if you could direct me in the right direction to what fuel pump and fuel pressure regulator i should get? (96 4.6 Liter) Thanks alot
 

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Wow it seems as though you really know alot about nitrous
yes, yes he does.

well i got that info by calling zex and asking them, but it was a couple of years ago. if the 75-125 kit has changed maybe they have changed their other jet sizes as well????? beats me, you have waaayyyyyy more experience with this stuff than me.

anyway steve, im running those jet sizes now for the 55hp setting, what hp shot size did zex tell me to put in there????

fuel pump i would get the 255
 

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I truthfully don't know who you talked to but they obviously didn't know WTH they were talking about.

The 75 shot should be Nitrous 38- Fuel 34.

The 100 shot should be Nitrous 46 - Fuel 40

The old 125 shot should be Nitrous 52 - Fuel 38. The new one is Nitrous 54- Fuel 34.

Remember thats for the 4.6L V8, DRY KIT, set for 19# injectors. If you've upgraded injectors, mods, etc, then some tweeking needs to be done with the jets.

For the smaller shots use the ones in the last post. If you plan to go larger step it up over time and see how the car reacts. If the engine is in good condition and state of tune there is no reason why it should not be able to handle 55-75 shot. I'd certainly recommend upgrading the Fuel pump and Fuel pressure modulator at a minimum along with a tune for the car with your mods to keep it safe.

Use the system appropriately. I've said before and will again, you go beating on it, it'll beat back. Know what you are doing when you use it and do so safely for you and the car.

Happy Modding!:)
 

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Remember thats for the 4.6L V8, DRY KIT, set for 19# injectors. If you've upgraded injectors, mods, etc, then some tweeking needs to be done with the jets.
nope, havent touched any of that. just upgraded the fuel pump and added the adjustable fpr like you recommended before. maybe the retard at zex thought i was talking about a wet kit.:zdunno:


anyway, thanks for the info, guess i'll change out the jets before i take it to the track again.
 

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Discussion Starter #13
OKay a couple more questions. I have seen various ADJUSTABLE fuel pressure regulators and many "high performance" fuel pressure regulators. Is an adjustable regulator really that much better than just a performance regulator? i also researched a bit on the Zex website and saw a set of their specialized spark plugs... are those worth getting also? (only about $50 or so). Thanks again!
 

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I was researching on Zex.com a little more and i was wondering if this http://www.compperformancegroupstores.com/store/merchant.mvc?Screen=PROD&Store_Code=ZX&Product_Code=82020&Category_Code=FUELPUMP is a better option than doing the intake Walbro high flow pump and regulator. As i dont have access to a lift (dropping the tank will be that much more difficutl without a lift) and my exhaust is in one piece so if i do have to drop the tank i'd have to cut the exhaust off and weld it back on. So just wondering if the Zex boost a pump is a valid option for a fuel upgrade. Thanks alot!
 

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scp has the regulators for a good price, go to page four on the link. http://www.supercoupeperformance.com/partBrowser.aspx?category=19

for the fuel pressure gauge i bought a summit brand one and then went to home depot and bought some brass fittings to screw it into the regulator. alot cheaper than scp's $50 setup.

as for the boost a pump, honestly i have no clue. tbirdmedic, if you have a stock exhaust dropping the tank is very easy.
 

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Thats my problem. The exhaust is aftermarket. I havent had it up yet to check, but from what I remember, I will have to move a lot to do it. I am going to get it on a hoist on Thursday to have it rustproofed again, so I will give it a good looksee. I am compiling as much info about the Nitrous as I can. I dont want to go into this blind. Though if I do manage to blow it up, I see a CRATE MOTOR in my future!!!!! VROOM VROOM
 

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is it a cat back kit, or custom made system? if its just a cat back system you can pull it off easy. i put my pump in before i had my new exhaust system made.
 

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Discussion Starter #20
Where should i get the chip from to retard the timing? Is going to Lonnie for help a good idea? Thanks
 
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