Turbo6Smackdown
Well-Known Member
- Joined
- Dec 31, 2005
Why don't your sensor last in high octane?
What A/F Gauge are you guys using?
- Thread starter vader87
- Start date
What he said.
- Joined
- May 28, 2001
We use[d] Sonoco 114 NOLED..
incubus2432
Douchebag
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- Jun 23, 2006
The Scanmaster shows w/b readout and KR on the same screen......just like it shows narrowband and KR on the same screen (which is still available if you'd like).
- Joined
- Feb 18, 2006
It's not octane that kills them. It's leaded fuel.
Turbo6Smackdown
Well-Known Member
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- Dec 31, 2005
Ah, it uses the same readout. very nice.
And yea, I know octane doesn't kill o2 sensors. I questioned, because I didnt think anyone would actually use leaded fuel on an expensive o2 sensor. Though...what's ANYone using leaded fuel for, for that matter lol. Use unleaded race gas. Or mix 94 with xylene.
And yea, I know octane doesn't kill o2 sensors. I questioned, because I didnt think anyone would actually use leaded fuel on an expensive o2 sensor. Though...what's ANYone using leaded fuel for, for that matter lol. Use unleaded race gas. Or mix 94 with xylene.
- Joined
- May 28, 2001
Though...what's ANYone using leaded fuel for, for that matter lol.
I like the way it smells!
I like the way it smells!
forcefed3.8's
Buckeye Bullet
- Joined
- May 26, 2002
You should have a way to display. On my only run this year, I was seeing no knock, but my wideband read 12.6, way too lean. If I had stayed in it, something would have melted. I traced it back to my 2nd fuel pump not kicking on, as I adjusted the hobbs switch with a very crude boost source. I had the GEN 2 set to add 40% extra fuel at high rpms hoping to be super rich, so 1 340 pump supplied almost enough for the 1/8 mile.
Turbo6Smackdown
Well-Known Member
- Joined
- Dec 31, 2005
If your car was lean, wouldn't it start to knock? And couldn't you have seen a lean condition with the standard O2 sensor?
So a scanmaster, with kr and wb 02's is ok? Just tryin to figure this out, so I can make one order, and not have to order more crap down the line.
And what's recording my run. The post above said the powerlogger. If that's true. then where in the plogger am I looking for the results after the run ?
mr go fast
Member
- Joined
- Aug 8, 2007
Powerlogger has a buffer that stores 20 sec of run data. More than that it gets stored to your computer.
A conventional narrowband is only sensitive within a few points of Stoichmetric whereas a wideband is sensitive over a wide range of A/F ratios.
darkred87T
Active Member
- Joined
- Oct 27, 2003
Turbo6Smackdown;2298622 Your powerlogger records it? So you look into the powerlogger after your run for the logs?[/QUOTE said:Exactly.
Turbo6Smackdown
Well-Known Member
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- Dec 31, 2005
I know the difference between narrow and wide but, would that matter if your run's lean condition still woulda showed on the narrowband? With maybe a 500 or something reading?
And the powerlogger has a readout screen? I didn't know that. And how long of a run can be stored on the laptop? Are those files big?
And the powerlogger has a readout screen? I didn't know that. And how long of a run can be stored on the laptop? Are those files big?
Problem with trying to interpret the NB signal is that they are far too inconsistent. A reading of 700 "might" equal a 12:1 while a readinf of 680 might be 13:1.
Small reading changes in a NB will likely be (will be) huge changes in actual A/F ratio.
All of us that run a Wideband in conjunction with a Narrowband can tell you just how bad it is.
Turbo6Smackdown
Well-Known Member
- Joined
- Dec 31, 2005
I see. I say this because as I read more, I keep hearing how stupid widebands are, and how people have been tuning just fine without them. I tend to think that's wrong but,,, the proof is there. People have indeed been tuning without them for years. Whaddy think?
Yes, and I was one of those. I've only been running a wideband for just over a year. And since I run both (narrow band to run the ECM in closed loop for idle and cruise) (wideband takes over at WOT), and have the opportunity to see both run in unison.
Trust me, I never realized how far off the tune can be, even though the narrowband numbers "looked good" you still really have NO idea.
Oh sure, you can tell with the narrowband (assuming it's working correctly) whether or not you're somewhat rich or lean on your WOT pass, but... and that's a big but, you have no real idea just how far rich or lean you really are.
Anything richer than 14.0:1 or leaner than 15.4:1 on the narrowband and the curve is so radical even small readout changes can equal huge swings in actual A/F ratio.
Fortunately my narrowband is still working perfectly because it's still able to maintain a perfect 14.7:1 A/F ratio in closed loop mode.
As soon as I go WOT my wideband takes over and maintains my desired (set) 11.4:1 WOT A/F ratio.
Turbo6Smackdown
Well-Known Member
- Joined
- Dec 31, 2005
I definitely see the point but... does it matter how far off (i'm just playing the devils advocate here, so I can learn. it's not me arguing whatsoever) the tune is, seeing as how either way, you still gotta bring it back lean if you're rich, and rich if you're lean, correct? Who care's how far from stoich you are?
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