Lean condition?
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5th Gear
Joined: Feb 2014
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From: NE Alberta
Lean condition?
Hey guys this might be an old or repeat post and apologize now if so but can anyone tell me if it's worth it to put on the PnP NAMZ ADJUSTABLE O2 ENRICHNER KIT for my 2007 Ultra. Was reading that there might be a lean condition and my pipes are rather blue when looking at the gap on the forward pipe and at the slip on seams. Any input on manufacturer, distributer or maker to buy from if they're worthy is appreciated.
Thanks in advance..
Thanks in advance..
Outstanding HDF Member
Joined: Jan 2010
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From: earth
Really, they all have a cruise AFR above stoichiometric, 14.7:1, right from the factory? Here we go, ye haw!
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Joined: Sep 2010
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From: Phoenix '53, '88, '09 Big Twins
a prime symptom of a lean condition is pinging- pre-ignition.
this is more likely to occur when pulling loaded up a grade ( not like you have any grades near you) or dragging a trailer.
it will sound like pebbles in a coffee can and is usually momentary as the ECM will detect it and retard ignition timing.
however this retarded timing will usually cause the rpms to drop ( less power produced per stroke)...and the rider to downshift.
those of us who DIY and know how the system works can take readings from the o2 sensors with a voltmeter and from that know if the mixture is rich, lean, stoich etc and under which conditions, rpm, speed, load, temperature
In my case I have a 96" and a ness big sicker, no cat headers and supertrapps.
and I needed tuning compensation.
I use nightrider.com xieds, cost is the US under $125
Mike
this is more likely to occur when pulling loaded up a grade ( not like you have any grades near you) or dragging a trailer.
it will sound like pebbles in a coffee can and is usually momentary as the ECM will detect it and retard ignition timing.
however this retarded timing will usually cause the rpms to drop ( less power produced per stroke)...and the rider to downshift.
those of us who DIY and know how the system works can take readings from the o2 sensors with a voltmeter and from that know if the mixture is rich, lean, stoich etc and under which conditions, rpm, speed, load, temperature
In my case I have a 96" and a ness big sicker, no cat headers and supertrapps.
and I needed tuning compensation.
I use nightrider.com xieds, cost is the US under $125
Mike
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From: Illinois
What stoichiometric are we talking about? Stoichiometric means the ideal afr for your goal.
Stoichiometric for the lowest exhaust emissions is about 14.6/1
Power stiochioimetric is 12.5/1. The lower the stoichiometric, the more fuel is burned and the more power can be produced. So the ideal power stoichiometric that bikers are looking for should be the ideal power stoich and not the ideal emmisions stoich.
Of course I'm just an old coot that knows nothing. But I do have 11 HD's that run cool, strong and will last longer than any bike running emmisions stoich.
I'll add another one.The ideal stoichiometric afr for a drag bike run wot for a 1/4 mile would be from 10 to 11/1 afr.
Stoichiometric for the lowest exhaust emissions is about 14.6/1
Power stiochioimetric is 12.5/1. The lower the stoichiometric, the more fuel is burned and the more power can be produced. So the ideal power stoichiometric that bikers are looking for should be the ideal power stoich and not the ideal emmisions stoich.
Of course I'm just an old coot that knows nothing. But I do have 11 HD's that run cool, strong and will last longer than any bike running emmisions stoich.
I'll add another one.The ideal stoichiometric afr for a drag bike run wot for a 1/4 mile would be from 10 to 11/1 afr.
Last edited by lh4x4; Feb 19, 2014 at 12:22 AM.
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From: Phoenix '53, '88, '09 Big Twins
ok define Stoichiometric, just so we use the term correctly:
Stoichiometric or Theoretical Combustion is the ideal combustion process where fuel is burned completely.
A complete combustion is a process burning all the carbon (C) to (CO2), all the hydrogen (H) to (H2O) and all the sulphur (S) to (SO2).
With unburned components in the exhaust gas, such as C, H2, CO, the combustion process is uncompleted and not stoichiometric .
Complete text ( and a nice read) here:
http://www.engineeringtoolbox.com/st...ion-d_399.html
air/fuel ratio and stoich are not the same thing
mike
Stoichiometric or Theoretical Combustion is the ideal combustion process where fuel is burned completely.
A complete combustion is a process burning all the carbon (C) to (CO2), all the hydrogen (H) to (H2O) and all the sulphur (S) to (SO2).
With unburned components in the exhaust gas, such as C, H2, CO, the combustion process is uncompleted and not stoichiometric .
Complete text ( and a nice read) here:
http://www.engineeringtoolbox.com/st...ion-d_399.html
air/fuel ratio and stoich are not the same thing
mike
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Joined: Mar 2009
Posts: 2,216
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From: Central Illinois
I see the brainiacs are throwing out their knowledge.
I also have an '07 and when I put on better mufflers and Screamin Eagle air cleaner I definitely needed some tuning as it seemed to have less power. I did the FuelPak and the bike ran much better. I do not know about the set up you are describing, have never heard of it before.
I also have an '07 and when I put on better mufflers and Screamin Eagle air cleaner I definitely needed some tuning as it seemed to have less power. I did the FuelPak and the bike ran much better. I do not know about the set up you are describing, have never heard of it before.