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Discussion Starter #1
Hey guys, :welcome:
I just bought a Barry Grant Nitrous Works 2 stage system, 100-425hp it has a 1/2" thick gold plate, it has 32 holes per bar, so 32Nitrous+32Fuel=64 holes.

I bought this system used and the guy gave me a jetting chart that says
Nitrous Jetting Chart

HP Setting Stage 1 N/F Stage 2 N/F
100/200 46/43 49/40
100/250 46/43 67/46
125/325 57/52 85/55
150/375 62/55 93/70
175/425 81/62 120/82

do these seem right?

I have wired the system up so that once I leave the line at wot the micro switch will activate the 1st stage and whenever I hit the push button the 2nd comes on and the 1st drops out, I did this because I only want to run a 100 off the line and 150 tops
so as of right now I have in the 1st stage: 46/43
and in the 2nd stage: 62/55
what do you guys think a good starting point?
or is this chart way out to lunch?
and what fuel pressure with these numbers?:confused:

thanks in advance!! :thumbup:
 

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You will get real good jetting and fuel pressure recommendations over in the Nitrous forum at Yellow Bullet Forums - Powered by vBulletin . Best place to ask IMO.

Both Monte Smith from originally NOS Systems and now Nitrous Supply and Steve Johnson from Induction Solutions hang out over there, Steve is the nitrous section moderator. Many more knowledgeable nitrous users over there than here at Hotrodders.

Jet charts and fuel pressures have been revised a few times as they learn more about what works and what doesn't, and have weeded out most of the old wives tale's and misinformation surrounding nitrous over there.

Your chart looks like a later revised chart, but I don't remember the fuel pressure recommendation for it, so I don't want to tell you something wrong
 

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Discussion Starter #3
Ok I'll try that thank you, I was actually emailing Monte a bit but he hasn't gotten back to me now for a few days so not to sure what's up, I imagine a busy guy lol I hope if I post there he wouldn't be offended...
 

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I'm sure it is his busy time, with all the grudge and Radial tire racing going on down south USA at this time of the year,...but there are a bunch of guys more than willing to help on that forum.
 

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Discussion Starter #5
Ya makes sense, thanks posted it there now, I guess it takes away before it shows up over there.
 

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Ya makes sense, thanks posted it there now, I guess it takes away before it shows up over there.
Make sure you post in the "Hi, I'm a Newbie" thread in the "Trash or Be Trashed" forum, they sometimes get rather anal about people not doing that right off. It's a "sticky" at the top of the section.
 

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Make sure you post in the "Hi, I'm a Newbie" thread in the "Trash or Be Trashed" forum, they sometimes get rather anal about people not doing that right off. It's a "sticky" at the top of the section.
Yeah that forum is too much! Great for info but you have to wade knee deep in scum to get to it.
 

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Discussion Starter #9
Ya I've noticed that as well lol my thread is still not up over there, how long does it usually take?
 

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Sometimes takes a while for new member approval, I joined way back when they didn't have that.

Tech sections aren't nearly as bad for BS as the "Trashed" section is.

I did a little searching on jetting and nitrous works plate systems over there, your jet chart is the later version, and most are starting out at 6.5-7 psi fuel pressure and then leaning down as they read fuel ring on the plugs. Most end up in the 6-5.5 psi range, some as low as 4.5 psi.

Most are starting off 900 psi bottle pressure, as that makes a difference on how rich/lean it ends up also.

Did you post it as a new thread, or add it to an existing thread? Posting fresh is the best way to get a response.
 

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Discussion Starter #11
I posted as a new thread I tried it twice but I guess I'll just have to wait and do some searching as well.

is that pretty normal to have such a big gap? Say for the 175 shot..81/62?
 

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I posted as a new thread I tried it twice but I guess I'll just have to wait and do some searching as well.

is that pretty normal to have such a big gap? Say for the 175 shot..81/62?
That looks like a big gap to me, but I'm using NOS Systems and Snipers, a lot of the references I've found to BG Nitrous Works show some wide spreads with high fuel pressure (7-8 psi) rather then closer splits and the 4.5-5.5 psi that most still in business are using.

Do you happen to have the part # for the kit you have?? That seems to make a difference also...hole count in bars, and individual hole sizes in the bars are important.

Seems BG Nitrous Works had their own special jets, with larger .188" shanks on them, so you can't use other company's jets.
 

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Discussion Starter #13
I cant seem to find a part # anywhere, not even on the solenoids, or plate, but there are 32 holes in each bar so 64 for both,
using my caliper I tried eye balling the holes looks like the small holes in the bar are approx. .030"+/-
The outside of the jets measure .188" like you said.
Where the jet slides in looks to be about .190".
Just inside of where the jets sit look to be about .117"-.120" be close.
My Y fitting on the side that goes to the plate, that center seems to be about .136".
And all 4 lines coming from solenoids are also about .117"-.120" should be very close, i found a electric wire that slid in with a very very little bit of side play.
 

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From what I can find, it appears you have the 2-stage "Billet Atomizer" plate system, with the nitrous being mixed with fuel at the nozzle for each stage and the mix then being fed into a separate spray bar for each stage.

It's different than most 2 stage systems, as most 2-stage have 4 spray bars, each stage has it's own separate nitrous and fuel spray bar. That could be why the jetting chart looks so different from everyone else.

Hopefully you can get a response from Steve or Monte over at the Bullet.
 

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Discussion Starter #16
Ya I hope so to, from the way mine is setup right now I have both nitrous solenoids on the same side both leading to a Y fitting then into one spray bar and the same with the fuel solenoids on the other side
 

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You could also join the forum at Induction Solutions website, I see a pretty good question and answer forum over there also.
 

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Discussion Starter #19
ok well I hope some of you are still with me on this..

I just started mounting the plate and lining up the lines and ran into another problem.
my nitrous lines come out to far the way they are bent right now and are touching the dizzy,:pain:
im guessing the guy before me had a smaller dizzy of some sort.

im not sure now if I should attempt to try bending them up? not sure how easy these lines kink.
or order some braided hoses?

I was looking at http://www.summitracing.com/int/sea...tOrder=Ascending&keyword=braided nitrous line
getting 2 at 18" and 2 at 12"
is the -3 an the size I would need?
I wonder what size the orifice are on these?
 

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Yes, -3 AN is the correct size hose.

You can get an inexpensive hand bender from NOS Systems and from most parts stores, it is the same size hard line as 3/16" brake line, just has a different 37° flare instead of the 45° flare that is used on inverted flare brake line.

Uses a standard 3/16" compression fitting ferrule at the solenoid end, if you have to cut the hard line shorter.
 
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