BADMOFO

I can't seem to get a straight answer on this one. I have a dry system on my 5.3 Silverado, and I need to know the jet size needed for a 75 shot and for a 100 shot. I've had several people tell me that a wet system needs a smaller jet to attain the same power level compared to a dry system. One guy (on LS1Tech) just told me that a 75 shot wet needs a 47 jet, and a 75 shot dry needs a 96 jet . I'm confused on how wet or dry would make any difference. I even linked the jet chart found above in the sticky to this guy in a PM and he said that those jets sizes/power levels were for a wet system?? Also, wouldn't a dry shot need less of a jet (if there were any variance) since I would expect it to be a tad leaner if anything then a wet system??? Somebody with some experience help me out, as I'm off to the track this Sunday and would like to know what I got before I get there. Thanks.

koolrayz

iTrader: (26)

Just use the jet chart in the sticky (colonels nitrous files)
http://home.ican.net/~jsetter/nitrous.html
There are alot of variables that will decide what you see at the rear wheel. Bottle pressure A/F etc. Youre just spraying a small shot dont sweat it. Use the chart not what somebody (you dont even know) tells you

BADMOFO

I know that the "variables" will play into it, and not every car will pick up the same, but there has to be a "set standard" as far as this goes. I know this subject has been beaten to death, but there still doesn't seem to be a straight answer. I've read the sticky, I've done searches and ready every post on the subject. Some say that the .47 jet in a duel nozzle set up like the NOS will need to be doubled in a single nozzle set up to duplicate the same power, but I just don't know. I just don't want it to be TOO small of a shot. Hell if the above is true, and I use a .47 jet in a single nozzle, I'll be lucky to get another 50hp out of it. Thanks for your time.

koolrayz

iTrader: (26)

Some say that the .47 jet in a duel nozzle set up like the NOS will need to be doubled in a single nozzle set up to duplicate the same power.
I disagree with that statement and so does the chart.
The chart says
100 shot=.047 single jet or .032 double
75 shot=.042 single jet or .028 double
Take the 100 shot .047 is not twice the .032 from the double.
The actual way to compare flow rates of different orifices is a method of squaring the nozzle size. For instance .047x.047=.002209 this is the single nozzle
.032x.032=.001024 per nozzle. there are 2 nozzles so you multiply by 2 =.002048
Thats how you would calculate it. there is a small difference between the 2 but this chart isnt designed to navigate a man to the moon its just a guide. Again read the chart it shows the shot for single N2O setups and for dual N2O

Worm

iTrader: (2)

What jets are you using kool?

BADMOFO

Thanks for your help explaining the whole concept. I feel much more comfortable now. I never really was afraid of running too much of a shot, more so too small of one. I got a 6.0L motor that has been sitting on the floor since April and I figure this might give me some "incentive" to get off of my *** and get it in. This 5.3 is just running so good, I haven't really "needed" the 6.0 yet. This might all change this weekend. Thanks again.

koolrayz

iTrader: (26)

The first stage is a dual nozzle with .047 jets
The second stage a single nozzle with a .056 jet
run 1150 to 1200 psi bottle pressure

Magic Chicken

iTrader: (1)

When all else fails, call the manufacturer of the nozzle you are using. I'd take their word over anyone elses.

koolrayz

iTrader: (26)

Well spoken Eric

98TXFBODY

also remember that NOS measures there gains at the fly-wheel and NX measures theres at the wheels.

SickToo

Why would you square it? That’s not how cross sectional area of a round hole (jet) is calculated.

The radius of the inside diameter squared x Pi = cross sectional area of a round hole

And it’s why (2) .032 orfice flow about the same volume as (1) .047 as stated in the chart

: )

gametech

iTrader: (1)

Nitrous guys have to deal with some of the worst bs in the world. It is generally assumed that nitrous people are "Fast and Furious" type idiots. This being said, It is simple math. If you can't do simple math, don't spray nitrous oxide.

rpturbo

iTrader: (47)

But lots can't do the math, and wonder why the hell it blew up.

Doug G

Nitrous Oxide fuel Jet size and HP Calculator nos n2o (robietherobot.com)