second_2_none

iTrader: (6)

I have a low pressure stand alone for my nitrous so I'm unsure of what split I should use for my nitrous/fuel jets. Right now I have a .081Nitrous and a .073 fuel and its extremely rich. I've lowered the fuel pressure down to 4 psi and it got just a little better but not by much. Tomorrow I'm going to go by some more jets, just need to know what I should start with.

second_2_none

iTrader: (6)

Nothing? Even made a new post and till can't get a reply.

bmeyer40

iTrader: (5)

What plate or fogger are you running?

second_2_none

iTrader: (6)

A wilson manifolds pro flow plate kit.

bmeyer40

iTrader: (5)

How is your af off the spray? That spread seems it should be close.

second_2_none

iTrader: (6)

My afr on motor is right at 12.5. Yeah I thought the jetting seemed about right as well, but my afr says otherwise lol.

brandon6.0

iTrader: (32)

Read plugs. Call wilson and ask for jetting specs for that plate/shot.

bmeyer40

iTrader: (5)

My next move would be to take both solenoids apart and inspect. If you have a nitrous filter check that. Also try clearing the feed line.

NitrousExpress

iTrader: (4)

Best thing to do to get a basepoint and tune to your car from there. Reading plugs helps also. What he ^ said.

-Garrett

speedtigger

iTrader: (16)

On an 81 nitrous jet, I am running a 69 fuel jet with 5.5 lbs of fuel pressure. This is with a NOS Cheater plate. I have seen a lot of guys running a 14 jet spread with good results.

bmeyer40

iTrader: (5)

I would also keep fuel pressure constant and tune with the jets.

87silverbullet

iTrader: (11)

I have had an 82n/73f with 5.25 psi in a speedtech plate and it was still on the rich side. Might want to send that system to Steve Johnson and let him flow it and blueprint it just to make sure.

bmeyer40

iTrader: (5)

That's $400. I would try some simple things first.

WE TODD DID

iTrader: (2)

There is a few things I would do. First I would pull the nitrous solenoid apart and see if the plunger has a dimple. You may need to rebuild the solenoid, which is very easy. You didn't say what size solenoids that you have, but with the -4 feed line, I would suspect that you're going to need at least a 10-12 point jet spread at about 5psi.

87silverbullet

iTrader: (11)

Sometimes it's just easier to spend that 400 instead of wasting time and trying to figure things out when you don't have the correct tools to do the job. I've been down that road already chasing your tail.

I'm not saying you're wrong at all. I'm just saying you have to know when to throw in the towel and let somebody who does this for a living get their brain in on your problem. Just as you said though free is better than any amount of money. I did a Lil research on the bullet and found that his jet spread might need to be a Lil wider. Here you go OP.

http://www.yellowbullet.com/forum/sh...d.php?t=350613

brandon@nitrousoutlet

iTrader: (2)

With the -4 main feed line I would try to minimize the amount of 90 degree bends the nitrous side has to make. If it wont clean up, keep dropping fuel jet sizes with a consistent fuel pressure. Once you get it close with jetting you can fine tune it with the regulator. Some of these jet spreads I'm seeing are really conservative(FAT). For example our spray bar jetting(which will be similar to a spray bar style plate) called for an 82N/67F at 7 pounds of fuel pressure and I can tell you right now that's a rich tune up. Feel free to give me a call and I can help steer you in the right direction.

speedtigger

iTrader: (16)

I agree.

I learned about the modern nitrous jetting trends from the guys on The Bullet. The guys who run low pressure nitrous fuel systems mostly run around 5.25 lbs of nitrous fuel system flowing pressure. They do this so they can share tune jetting information with one another in a sort of standard format.

Most of the more knowledgeable group recommend a 10 to 12 jet split as a safe starting point. These same knowledgeable guys say they went leaner from there. Most of these experienced people also say they shoot for the same A/F ratio on nitrous as they do N/A. Some slightly richer.

I run an 81n/69f jet spread at #5.5. It puts me about .5 of a point richer than N/A on my wideband. But, my plugs are look excellent, so I am sticking with the 12 jet spread for now.

If it were mine, I would try to at least get in the ballpark with the jetting with others with similar setups before I went looking for other solutions.

second_2_none

iTrader: (6)

Sorry I haven't checked back for a while. Thanks so much for all the responses guys, def some good info! There are no 90 or 45 degree fittings on my nitrous feed line. I just recieved my new jet kit in the mail from Wilson. I actually have a sale pending on the car, I find out tomorrow weather the guy can meet me in TX to buy it. If he cant I will put in more of a jet spread with 5.25-5.5 psi and get it dialed in. Either way I will update this to let you guys know.