I have a 2003 base coupe / 5 MT. I am going to install a 55 shot of nitrous, using a ZX dry kit more than likely. I have heard several different things about this. One is that I will be fine on stock fuel granted I dont go above a 55 shot. Another I have heard is I should have some sort of fuel mods. To be safe, please advise on this. Can I take this to mean I need an AFPR or larger injectors, and fuel pump?
Thanks!
Chris
2006 Cobalt SS I/H/E ZZP S2 HPT 2.8/60's Etc...13.8@105(I need to learn how to launch)
I'd reconsider actually. Go with a wet kit..there's your fuel mod right there. You could run a 55 with no problems, hell you can run 75 on a wet setup and be much better off than dry. No guarantees that you're not going to blow yourself up, but you have a lesser chance going this route
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Chris Dixon wrote:I have a 2003 base coupe / 5 MT. I am going to install a 55 shot of nitrous, using a ZX dry kit more than likely. I have heard several different things about this. One is that I will be fine on stock fuel granted I dont go above a 55 shot. Another I have heard is I should have some sort of fuel mods. To be safe, please advise on this. Can I take this to mean I need an AFPR or larger injectors, and fuel pump?
Thanks!
Chris
For a Zex dry kit you don't need any fuel mods at all. The Zex kit will raise you fuel pressure according to your bottle pressure as well as the size jet you are using to spray the correct amount of additional fuel needed threw your factory fuel injectors. Your factory fuel injectors, FPR and pump will be just fine for up to a 75 shot. Adding larger injectors or raising your fuel pressure with a AFPR would just make you run rich and lose power. You can install a higher volume fuel pump if you want but for the shot you want to run it isn't needed.
Gonzo (The Long Nosed One) wrote:I'd reconsider actually. Go with a wet kit..there's your fuel mod right there. You could run a 55 with no problems, hell you can run 75 on a wet setup and be much better off than dry. No guarantees that you're not going to blow yourself up, but you have a lesser chance going this route
Why try telling people what to do when you don't know what you're talking about? A dry kit supplys the extra fuel just like a wet kit does, so what makes the wet kit "much better off than a dry"? There is also no less chance of blowing your motor with a wet kit than there is with a dry kit, you are just wrong.
The simple fact is that the intake manifolds on our cars were designed to flow air only, not fuel. Fuel can puddle up in the intake manifold because of this from a wet kit. This actually makes dry kits the better choice on fuel injected cars assuming you're not running too big of a shot.
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Well I do appreciate the responses. I am actually going to go to a wet kit now, as the deal I will be getting is more appealing.
Though I would agree with Skilz, providing I didnt run more than that I would be fine. But I may eventually go bigger and that I am getting a better deal is making me lean towards wet.
Thanks!
Chris
2006 Cobalt SS I/H/E ZZP S2 HPT 2.8/60's Etc...13.8@105(I need to learn how to launch)
Skilz10179 wrote:Chris Dixon wrote:I have a 2003 base coupe / 5 MT. I am going to install a 55 shot of nitrous, using a ZX dry kit more than likely. I have heard several different things about this. One is that I will be fine on stock fuel granted I dont go above a 55 shot. Another I have heard is I should have some sort of fuel mods. To be safe, please advise on this. Can I take this to mean I need an AFPR or larger injectors, and fuel pump?
Thanks!
Chris
For a Zex dry kit you don't need any fuel mods at all. The Zex kit will raise you fuel pressure according to your bottle pressure as well as the size jet you are using to spray the correct amount of additional fuel needed threw your factory fuel injectors. Your factory fuel injectors, FPR and pump will be just fine for up to a 75 shot. Adding larger injectors or raising your fuel pressure with a AFPR would just make you run rich and lose power. You can install a higher volume fuel pump if you want but for the shot you want to run it isn't needed.
Gonzo (The Long Nosed One) wrote:I'd reconsider actually. Go with a wet kit..there's your fuel mod right there. You could run a 55 with no problems, hell you can run 75 on a wet setup and be much better off than dry. No guarantees that you're not going to blow yourself up, but you have a lesser chance going this route
Why try telling people what to do when you don't know what you're talking about? A dry kit supplys the extra fuel just like a wet kit does, so what makes the wet kit "much better off than a dry"? There is also no less chance of blowing your motor with a wet kit than there is with a dry kit, you are just wrong.
The simple fact is that the intake manifolds on our cars were designed to flow air only, not fuel. Fuel can puddle up in the intake manifold because of this from a wet kit. This actually makes dry kits the better choice on fuel injected cars assuming you're not running too big of a shot.
Agree on some of this. Zex is crap, it is supoose to raise fuel pressure, but does a crappy job of it. I have known of many J's blowing motors on Zex. I have seen dyno charts of the hp up and down on one run on a Zex kit. I would never go there. I wuld take my chances on a wet kit.
Yes puddling can happen with a wet kit. If you want to go serious do a direct port set-up.
FU Tuning
go for a wet kit... i myself use zex.
"zex is crap"
what do you base this off of? a couple of people you have read about who blew their engines because of their own inattention to their fuel pressure or a/f mixture, improperly installed the kit, or simply ran too much horsepower? the vast majority of nitrous failures are from user error, not from a malfunctioning kit.
another thing....alot of people on this forum like to think that fuel puddling from wet kits is a "harmless" side effect. it's not. backfiring from fuel puddling can be as destructive as lean detonation. it can cause fires in the engine bay, blow the hood open, or even cause internal engine damage. some happen to get lucky and ruin nothing more than a plastic manifold and intake pipe. its a gamble with either setup. both have equally dangerous consequences *see the vid in "other cars" forum of the z06 nitrous fire. theres your fuel puddling*
i do however agree that a wet kit is safer for higher horsepower shots such as over 75 and preferably direct port. i wouldnt trust fuel pressure alone to handle fuel enrichment for >75. that much hp from a dry kit is definitely asking for problems. 55 shot dry should not give anyone problems assuming everything is in good working order prior to spray
damned lack of edit option! anyways i meant to say that 55 dry should work fine with no additional fuel mods, assuming everythings in good condition and proper precautions are taken regarding spark plug heat range and higher octane gas.
