Hey guys, a buddy of mine got a ZEX Nitrous kit for his '01 3500 auto. The kit didn't come with a purge valve. Anybody know if he needs to have one? I would think so, but I've never messed with NO2 before.
Cheers

 

I wouldn't think it would matter on a dry system.

 

"dry system" Is that because it's injected into the intake horn and not directly into the combustion chamber?
Thanks Mike D !

 

I believe "dry system" is a system that only injects nitrous and no extra fuel.

 

No I think dry system is when it is injected into the intake with the air. Wet system is when it's mixed with the fuel, then injected.

 

no need to worry about a purge set up, we really can't run the motor to lean.

 

Thats correct.I have never purged mine and I run a good amount

 

Wet to ricers means injected into the cylinder. Wet to the NO2 supply houses means fuel system upgrade that adds an extra shot of fuel with the shot of NO2. If you don't purge, you risk the chance of pushing a little compressed air into the engine intake system when the solenoid opens until NO2 gets down there. {Prolly not a problem since all of us are trying to get as much compressed air in there as we can}

 

I really appreciate all the info ! My buddy will be happy he doesn't have to buy anything else....well for that system anyway!

 

the diffrence between wet and dry right here . "A fuel injected dry manifold system uses a spray nozzle to deliver only nitrous oxide to the intake. A wet manifold system introduces fuel and nitrous into the intake manifold. With a dry manifold system, the additional fuel is supplied by increasing fuel delivery from the injectors when the nitrous system is activated. It is called a dry manifold system because there isn't any fuel present in the intake manifold." taken from http://www.nitrouskits.co.uk/Technical/wet-dry.htm or for more take a look at edelbrocks site heres a link to both wet and dry kits with pics http://www.edelbrock.com/sportcompac..._efi_dry.shtml
http://www.edelbrock.com/sportcompac..._efi_wet.shtml

and back to the main topic there is really no need to purge then on our trucks , but if you were at a drag strip would really be the only time that the lag would matter/ be noticed. and it will only be as long as it takes the gas to get the from the solenoid valve , to the jet in the intake so roughly a 1' of hose or so. hope the info helps. cole

 

I have never seen a nitrous system that injects nitrous directly into the cylinder. You would need to redesign the head to accommodate a nitrous injector.

Wet means that fuel is mixed with the nitrous to correct for the lean situation that nitrous creates. This is for gassers as we would not want extra diesel being added by anything other than the fuel injector itself. On gassers all of the higher hp kits are wet to compensate for the extreme extra amount of oxygen. Dry type systems are typically lower hp setups where the gassers factory fuel system is capable of supplying the extra fuel when the nitrous is activated. Dry systems will have one line running to the nozzle, wet systems will have two.

As to the original post, be sure to purge the line before you hook it up to the nozzle to make sure the line is clear. Hook it up and don't worry about it, the purge valve is not required, unless you just want to show off.