Too lean on nitrous
Thread Starter
Racer
Joined: Jun 2011
Posts: 405
Likes: 5
Too lean on nitrous
Details on the car
Intake only 02 z06
Hsw plate
Nx stage 6 lightning solenoids
Nx window switch
Lnc2000
Tr6 plugs
3000psi nano kit
.046 .028 jets
Aem wb02
Equal length lines from solenoids to plate
I've been working on the kit and the wiring for the last week or two. Took it out last night to test it out.
When the kit comes on at 4k Afr jumps up to 14.5-14.7. Got out of it the first time. Tried it again thinking it was just a lean spike and after about 1.5 seconds it starts breaking up I think. It kinda sounds like a rev limiter.
Upped the jet to .031 same thing happens. Then again on a .035.
Does this soynd like a specific problem to anyone. I didn't get much into diagnosing it last night. I'm wondering if I have a clogged fuel line to the plate or maybe fuel solenoid not opening.
Any other suggestions
Thanks
Intake only 02 z06
Hsw plate
Nx stage 6 lightning solenoids
Nx window switch
Lnc2000
Tr6 plugs
3000psi nano kit
.046 .028 jets
Aem wb02
Equal length lines from solenoids to plate
I've been working on the kit and the wiring for the last week or two. Took it out last night to test it out.
When the kit comes on at 4k Afr jumps up to 14.5-14.7. Got out of it the first time. Tried it again thinking it was just a lean spike and after about 1.5 seconds it starts breaking up I think. It kinda sounds like a rev limiter.
Upped the jet to .031 same thing happens. Then again on a .035.
Does this soynd like a specific problem to anyone. I didn't get much into diagnosing it last night. I'm wondering if I have a clogged fuel line to the plate or maybe fuel solenoid not opening.
Any other suggestions
Thanks
Burning Brakes
Joined: Apr 2009
Posts: 762
Likes: 2
From: Kopavogur in Iceland
Details on the car
Intake only 02 z06
Hsw plate
Nx stage 6 lightning solenoids
Nx window switch
Lnc2000
Tr6 plugs
3000psi nano kit
.046 .028 jets
Aem wb02
Equal length lines from solenoids to plate
I've been working on the kit and the wiring for the last week or two. Took it out last night to test it out.
When the kit comes on at 4k Afr jumps up to 14.5-14.7. Got out of it the first time. Tried it again thinking it was just a lean spike and after about 1.5 seconds it starts breaking up I think. It kinda sounds like a rev limiter.
Upped the jet to .031 same thing happens. Then again on a .035.
Does this soynd like a specific problem to anyone. I didn't get much into diagnosing it last night. I'm wondering if I have a clogged fuel line to the plate or maybe fuel solenoid not opening.
Any other suggestions
Thanks
Intake only 02 z06
Hsw plate
Nx stage 6 lightning solenoids
Nx window switch
Lnc2000
Tr6 plugs
3000psi nano kit
.046 .028 jets
Aem wb02
Equal length lines from solenoids to plate
I've been working on the kit and the wiring for the last week or two. Took it out last night to test it out.
When the kit comes on at 4k Afr jumps up to 14.5-14.7. Got out of it the first time. Tried it again thinking it was just a lean spike and after about 1.5 seconds it starts breaking up I think. It kinda sounds like a rev limiter.
Upped the jet to .031 same thing happens. Then again on a .035.
Does this soynd like a specific problem to anyone. I didn't get much into diagnosing it last night. I'm wondering if I have a clogged fuel line to the plate or maybe fuel solenoid not opening.
Any other suggestions
Thanks
could be your are maxing out your fuel system and loosing pressure
Baezi
Tech Contributor
Joined: Apr 2007
Posts: 10,924
Likes: 78
From: Forney Texas
Get those projected plugs out of there and run a set of BR7EFS gapped at .035"
Just because your wideband shows that you're lean doesn't mean it's true.
You could easily have cylinders dropping out due to ignition problems and they often won't show up until your cylinder pressure rises on the nitrous. A cylinder that doesn't burn the fuel will make the wideband show lean on the entire bank and make you think you need more fuel. When you add fuel, the car runs worse. Work to identify the true problem.
Just because your wideband shows that you're lean doesn't mean it's true.
You could easily have cylinders dropping out due to ignition problems and they often won't show up until your cylinder pressure rises on the nitrous. A cylinder that doesn't burn the fuel will make the wideband show lean on the entire bank and make you think you need more fuel. When you add fuel, the car runs worse. Work to identify the true problem.
Tech Contributor
Joined: Apr 2007
Posts: 10,924
Likes: 78
From: Forney Texas
Close the nitrous bottle off and just make a pull with the nitrous system engaged on fuel alone. Start from a high RPM so you will have the greatest demand for fuel and make a short hit. Have someone watch your gauge or video it so you can watch it and get an accurate view of what it's doing at WOT
Thread Starter
Racer
Joined: Jun 2011
Posts: 405
Likes: 5
Tr6 gone. Br7 in gapped .032
Bottled closed and system on the afr pegs at 10.0. So the fuel side is working.
I have went over wiring and checked the lnc again.
Changed to a 50 shot
31/18 and the car ran good. A little leaner on the afr then I liked. High 12s, no breaking up.
75ish shot
38/24 ran great Afr was high 11s low 12s
85-90?
41/26 no breaking up, but high 13s afr
How do I calculate what shot im doing, from the nitrous jet or the fuel jet? With the nano my nitrous jet is smaller then the standard size.
I want a 100 shot, so I'm thinking a 28f and 44n
Bottled closed and system on the afr pegs at 10.0. So the fuel side is working.
I have went over wiring and checked the lnc again.
Changed to a 50 shot
31/18 and the car ran good. A little leaner on the afr then I liked. High 12s, no breaking up.
75ish shot
38/24 ran great Afr was high 11s low 12s
85-90?
41/26 no breaking up, but high 13s afr
How do I calculate what shot im doing, from the nitrous jet or the fuel jet? With the nano my nitrous jet is smaller then the standard size.
I want a 100 shot, so I'm thinking a 28f and 44n
Tech Contributor
Joined: Apr 2007
Posts: 10,924
Likes: 78
From: Forney Texas
Tr6 gone. Br7 in gapped .032
Bottled closed and system on the afr pegs at 10.0. So the fuel side is working.
I have went over wiring and checked the lnc again.
Changed to a 50 shot
31/18 and the car ran good. A little leaner on the afr then I liked. High 12s, no breaking up.
75ish shot
38/24 ran great Afr was high 11s low 12s
85-90?
41/26 no breaking up, but high 13s afr
How do I calculate what shot im doing, from the nitrous jet or the fuel jet? With the nano my nitrous jet is smaller then the standard size.
I want a 100 shot, so I'm thinking a 28f and 44n
Bottled closed and system on the afr pegs at 10.0. So the fuel side is working.
I have went over wiring and checked the lnc again.
Changed to a 50 shot
31/18 and the car ran good. A little leaner on the afr then I liked. High 12s, no breaking up.
75ish shot
38/24 ran great Afr was high 11s low 12s
85-90?
41/26 no breaking up, but high 13s afr
How do I calculate what shot im doing, from the nitrous jet or the fuel jet? With the nano my nitrous jet is smaller then the standard size.
I want a 100 shot, so I'm thinking a 28f and 44n
running the test if the fuel solenoid is firing, but you need to know that your fuel system is capable of supplying the necessary volume and pressure while you're on the button. I would recommend redoing the test while getting some fuel pressure readings at the rail and doing it with the fuel jets you plan on using for the shot you're going to be running.
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Burning Brakes
Joined: Apr 2009
Posts: 762
Likes: 2
From: Kopavogur in Iceland
here you can calculate the jet sizes http://www.robietherobot.com/NitrousJetCalculator.htm
Last edited by baezi z06; Oct 19, 2012 at 05:24 PM.
Burning Brakes
Joined: Jun 2012
Posts: 1,240
Likes: 1
From: Orange County California
Tr6 gone. Br7 in gapped .032
Bottled closed and system on the afr pegs at 10.0. So the fuel side is working.
I have went over wiring and checked the lnc again.
Changed to a 50 shot
31/18 and the car ran good. A little leaner on the afr then I liked. High 12s, no breaking up.
75ish shot
38/24 ran great Afr was high 11s low 12s
85-90?
41/26 no breaking up, but high 13s afr
How do I calculate what shot im doing, from the nitrous jet or the fuel jet? With the nano my nitrous jet is smaller then the standard size.
I want a 100 shot, so I'm thinking a 28f and 44n
Bottled closed and system on the afr pegs at 10.0. So the fuel side is working.
I have went over wiring and checked the lnc again.
Changed to a 50 shot
31/18 and the car ran good. A little leaner on the afr then I liked. High 12s, no breaking up.
75ish shot
38/24 ran great Afr was high 11s low 12s
85-90?
41/26 no breaking up, but high 13s afr
How do I calculate what shot im doing, from the nitrous jet or the fuel jet? With the nano my nitrous jet is smaller then the standard size.
I want a 100 shot, so I'm thinking a 28f and 44n
At the Nitrous Express website they have a jetting chart broke down by vehicle.
I'm running a 150 shot and am using a 62n and 36f on a single nozzle system.
do you have a pressure gauge on your bottle...or a bottle warmer....I'm wondering if your bottle pressure is spraying too low and your fuel levels are to high for the amount of NOS your spraying, that, combined with projection tip plugs that have the effect of advancing the timing may be throwing things off.
Burning Brakes
Joined: Jun 2012
Posts: 1,240
Likes: 1
From: Orange County California
Get those projected plugs out of there and run a set of BR7EFS gapped at .035"
Just because your wideband shows that you're lean doesn't mean it's true.
You could easily have cylinders dropping out due to ignition problems and they often won't show up until your cylinder pressure rises on the nitrous. A cylinder that doesn't burn the fuel will make the wideband show lean on the entire bank and make you think you need more fuel. When you add fuel, the car runs worse. Work to identify the true problem.
Just because your wideband shows that you're lean doesn't mean it's true.
You could easily have cylinders dropping out due to ignition problems and they often won't show up until your cylinder pressure rises on the nitrous. A cylinder that doesn't burn the fuel will make the wideband show lean on the entire bank and make you think you need more fuel. When you add fuel, the car runs worse. Work to identify the true problem.
I thunk his fuel to nos mix is off and his plugs are'nt burning everything right.
Burning Brakes
Joined: Jun 2012
Posts: 1,240
Likes: 1
From: Orange County California
Thread Starter
Racer
Joined: Jun 2011
Posts: 405
Likes: 5
I'll look at my jet chart when I get home, but this seems like too big a fuel jet for your nitrous jet
At the Nitrous Express website they have a jetting chart broke down by vehicle.
I'm running a 150 shot and am using a 62n and 36f on a single nozzle system.
do you have a pressure gauge on your bottle...or a bottle warmer....I'm wondering if your bottle pressure is spraying too low and your fuel levels are to high for the amount of NOS your spraying, that, combined with projection tip plugs that have the effect of advancing the timing may be throwing things off.
At the Nitrous Express website they have a jetting chart broke down by vehicle.
I'm running a 150 shot and am using a 62n and 36f on a single nozzle system.
do you have a pressure gauge on your bottle...or a bottle warmer....I'm wondering if your bottle pressure is spraying too low and your fuel levels are to high for the amount of NOS your spraying, that, combined with projection tip plugs that have the effect of advancing the timing may be throwing things off.
the fuel jet probably seems big, but its because of the nano.
trying to tune again tonight, i've got dual widebands now so i can monitor both banks.
Advanced
Joined: Aug 2011
Posts: 82
Likes: 0
here you can calculate the jet sizes http://www.robietherobot.com/NitrousJetCalculator.htm
Burning Brakes
Joined: Mar 2010
Posts: 1,012
Likes: 7
From: Moore OK
Have you actually checked the plugs to see what its doing?
Before you do anything else, read this write up:
http://www.yellowbullet.com/forum/sh...d.php?t=415202
Before you do anything else, read this write up:
http://www.yellowbullet.com/forum/sh...d.php?t=415202