excess fuel whether burned or unburned will register as rich, at least that's how my widebands work...

oxygen might not physically burn but it's converted into other compounds, if oxygen didn't get used up by a heat source and then converted into CO2 and various other emissions then combustion would be impossible

 

No, you have it backwards again. The O2 sensor reads excess oxygen.

So, if any cylinders goes through a misfire the O2 sensor will see excess O2 and therefore, the WB will report a lean reading because the O2 did not get consume. This is basic knowledge. All WB's work like that. It amazes me how so many people have their facts wrong.

 

So your saying my car going leaner after upgrading the ignition and changing nothing else is a misfire?

 

You could have had a false reading. All I am saying is whenever you have complete combustion the O2 WB will always report a RICHER condition. The O2 sensor does not care about the fuel mixture, it only measures the O2 content.

On the same logic, anytime you have unburned fuel, you will have excess O2 that will register as a LEAN reading.

If you still do not believe me, set your top end fuel map way rich like 8:1 AFR and go WOT. You will see the O2 WB spiking to the LEAN side even though you have commanded full rich operation.

 

From wikipedia

The sensor does not actually measure oxygen concentration, but rather the difference between the amount of oxygen in the exhaust gas and the amount of oxygen in air. Rich mixture causes an oxygen demand. This demand causes a voltage to build up, due to transportation of oxygen ions through the sensor layer. Lean mixture causes low voltage, since there is an oxygen excess.

 

I noticed the bumper beam vibrating a bit so I got some sweet little vibrations mounts from work

 

those things work wonders on loud fuel pumps... they'll take a chassis mounted a1000 from whining and vibrating to as quiet as a walbro lol

 

exactly, being rich means all air in the cylinder was consumed before the complete fuel mass was burned off, meaning there's an oxygen demand that cannot be met, conversely being lean means the fuel mass burned completely but there is still excess oxygen in the exhaust gasses.

 

And if it misfire all the fuel mass will not burn. You will still have excess O2 which will be reported leaner than it really is on the O2 WB.

 

Cant believe tech on wikepedia guys...

 

NGK's view on upgrading ignition systems:

http://www.ngksparkplugs.ca/tech-inf...stallation.cfm

Spark Plug Answer:

http://repair.alldata.com/online2hel...ensor_work.htm

Also, we get it - most people know there are both lean and rich misfires, what exactly is your point?

 

It was funny don't you think.

 

NGKs Link

 

Don't you know the fuel savers work too...

 

I thought the whole point of having an upgraded ignition system was to have the BIGGEST, STRONGEST possible spark for combustion. Why in the hell would you keep the gap smaller than necessary? By your logic we should all forget spark upgrades and just keep closing the gap until it fires, then leave it as-is cause it still burns the fuel. 0.0005 plug gap ok to run? Of course, it still sparks right...

 

You don't need to have the STONGEST ignition system. If we did, we would be changing eroded spark plugs every 100 miles...

I'll say it again, if there is no misfire in the first place then ''upgrading'' ignition components will NOT lead to higher power.

 

Does a smaller air gap put more stress on the entire ignition system???

If not, why?

 

Maybe, but when you keep having to go smaller and smaller on the gap, there comes a point where you cant ignite the mixture and cant keep making power. Being able to open the gap up helps with part throttle as well. So overall there is a net benefit even if what your saying is true

 

this thread has helped me alot! but..where do i find the Senditracing icm delete ?

 

I could make you one..

 

i just saw turbols sig on a different thread..LOL

 

Lol I know.

Its a simple darlington pair transistor circuit in a box.

The parts literally cost 5 bucks.

 

Soo I think I am having issues or my coil is bad.

Started at 0.032 gap, couldnt get to wastegate (15lbs) without crazy breakup. Gapped it down to .024, could run 25lbs but not high (33lbs). Gapped it down to original 0.018, can run about 29lbs before its starts breaking up.

My stock distributor easily exceeded these boost levels before I had to cut the gap down.

And now I noticed when the car is hot (200) from stop n go, it will randomly die on me. I thought i messed up the fuel mapping but I think its the ignition failing. I felt the coil and the box and neither were very warm.

I'm only thinking I did something wrong, or maybe the ground I made for the box is too weak?

 

A log of it just dying in the parking lot after I got it started again.

 

Do your RPMs stay consistent when you datalog? The only reason I ask is because according to your wiring diagram it looks like you are using additional wires from the box that aren't needed as recommended by Crane Cams instructions. Did you consult the wiring diagram provided by Crane? It is page 10 and 11 that you should be focusing on.