Nitrous pop
Nitrous pop Running the motor in my sig playing with this system some. Have nitrous outlet Stinger II plate. 100 shot running .052 n .039 f. 32 degrees of timing on motor with 12.5 afr. Running standalone with c16 fuel flowing at 7 psi. Pulling a conservative 6 degrees of timing. Br7ef plugs gapped at .032. The motor is popping real bad on the nitrous and afr is stupid rich at 10.6 afr. Bottle pressure about 925 psi. Am I being to conservative on timing and should I pull fuel out and how much? Thanks
Last edited by baronsmith98; Dec 10, 2016 at 01:45 PM. Reason: Added bottle psi
NOS Coil Dwell The information could be better, thus my guess.
The stated Spark Instant @ 32* with 12.5 AFR.
The normal Spark Instant is 26*
I would try 20 degrees.
I would like to know what EMS ?
That "standalone", any, REQUIRES TDC verification, did you do so ?
What is your Coil Dwell ?
Lance
The stated Spark Instant @ 32* with 12.5 AFR.
The normal Spark Instant is 26*
I would try 20 degrees.
I would like to know what EMS ?
That "standalone", any, REQUIRES TDC verification, did you do so ?
What is your Coil Dwell ?
Lance
TECH Junkie
Joined: Dec 2012
Posts: 3,614
Likes: 1,326
From: Iowa
What do the plugs look like? They'll tell a better story than a wideband ever will.
6 degrees AND 2 steps colder plug sounds like a lot to me for just a 100 shot. But without looking at the plugs it's gonna be hard to tell.
6 degrees AND 2 steps colder plug sounds like a lot to me for just a 100 shot. But without looking at the plugs it's gonna be hard to tell.
I didn't get a good look at the plugs I had to drive a little before I could shut it off. I just ran a 50 shot the other day and it worked great. I also added a nitrous filter, I need to check that. I also noticed my voltage dropped when I was trying to spray it. Oh the headaches
Did the car pick up at all? Just making sure the Nitrous solenoid opened.
Check out this flow sheet for a much closer starting point:
http://www.nitrousoutlet.com/media/t..._flow_data.pdf
Check out this flow sheet for a much closer starting point:
http://www.nitrousoutlet.com/media/t..._flow_data.pdf
TECH Junkie
Joined: Dec 2012
Posts: 3,614
Likes: 1,326
From: Iowa
So you upped the fuel jet and solved a rich mixture issue? you were at 10.6 afr, and still went up a fuel jet? I'd bet ether there was a spark blowout issue, or possibly a sticky solenoid.
Did you get a chance to look at afr after the changes?
Did you get a chance to look at afr after the changes?
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I believe my afr gauge is off. I know that I said it was rich so sorry for the misinformation I feel dumb haha. When I went to a .035 the popping got worse so I thought that maybe it actually needs more fuel. Put the .042 jet in and it works a lot better. Plugs look a lot closer now. Going to put a fresh set in and try to fine tune it. Thanks for all the help
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Something doesn't jive here. The standard 52/35@7psi jetting should be rich no matter the combination unless there is something else going on. Typically, popping out of the exhaust is rich or an ignition issue(its raw fuel hitting the header). We build the jetting around adequate fuel pressure. What did you use to set the flowing fuel pressure? Did changing the gap alone make the difference?
I have an Induction Solutions flow tool. No I regapped the plugs and tried it with the .035 jet and it still popped. I agree it sounds like it shouldn't work but this is the only thing that has made it possible to run with no popping
TECH Junkie
Joined: Dec 2012
Posts: 3,614
Likes: 1,326
From: Iowa
Something doesn't jive here. The standard 52/35@7psi jetting should be rich no matter the combination unless there is something else going on. Typically, popping out of the exhaust is rich or an ignition issue(its raw fuel hitting the header). We build the jetting around adequate fuel pressure. What did you use to set the flowing fuel pressure? Did changing the gap alone make the difference?
Or, leave the .042 pill in it and open up the gap to where it was before.
I'm gonna put a fresh set of plugs in and make another pull and cut them open. May be able to move down to .039 jet. After I gapped the plugs to .030" I tried the .035 jet (pop, pop, pop) did nothing but put the .042 in and the bitch screams now. I should have a better idea when I can get a good look at these plugs. I've already verified plug gap, fuel pressure, solenoids opening, filters clean. What else do I need to be looking at? I'm going to check my plug wires tonight.
I'm gonna put a fresh set of plugs in and make another pull and cut them open. May be able to move down to .039 jet. After I gapped the plugs to .030" I tried the .035 jet (pop, pop, pop) did nothing but put the .042 in and the bitch screams now. I should have a better idea when I can get a good look at these plugs. I've already verified plug gap, fuel pressure, solenoids opening, filters clean. What else do I need to be looking at? I'm going to check my plug wires tonight.
You are running carb like fuel pressure on the standalone. So, fuel and nitrous jets should be pretty close to each other.
If your standalone was high pressure, then your stated jetting may be more on par.
This may not apply since you are running a different system but just throwing it out.
Coils and Wire Upgrade for LS1 OK, good news.
You will find when the engine makes more power, there will be a point when more Ignition Energy is required.
Thus my original question : "What coil is fitted AND what is your coil Dwell ?
What "standalone" is fitted ?
YOUR report "10.6" states your UEGO is not connected correctly.
What is the Brand ?
Did you grease the Sparkplug wires ?
Lance
You will find when the engine makes more power, there will be a point when more Ignition Energy is required.
Thus my original question : "What coil is fitted AND what is your coil Dwell ?
What "standalone" is fitted ?
YOUR report "10.6" states your UEGO is not connected correctly.
What is the Brand ?
Did you grease the Sparkplug wires ?
Lance
Sparkplug Wire Grease The cost of using Silicon Dielectric Grease on the plug boots is small.
This will DOUBLE the "flash" resistance needed to retain the HT voltage reducing losses.
Those who have visited my shop observing the use of my Sparkplug Pressure Test Chamber will attest to this upgrade.
The MSD product should be able to be "read" stating Coil Dwell.
You could call Joe Pando @ MSD for information on the 6010.
You could state the Denso coil # for me to be sure ?
Lance
This will DOUBLE the "flash" resistance needed to retain the HT voltage reducing losses.
Those who have visited my shop observing the use of my Sparkplug Pressure Test Chamber will attest to this upgrade.
The MSD product should be able to be "read" stating Coil Dwell.
You could call Joe Pando @ MSD for information on the 6010.
You could state the Denso coil # for me to be sure ?
Lance
Small update I made a pass with some new plugs, made a pass and cut it off. 52N 42 F 31* timing pulling 6*. I made this pass on a backroad and it felt pretty good. I feel like fuel is pretty close you can see a light haze, I also feel like timing is safe. Do I make any changes to this tune? Comments?
