What do you think of wide band '02??? - Team Camaro Tech
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post #1 of 20 (permalink) Old Jul 15th, 09, 04:59 PM Thread Starter
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What do you think of wide band '02???

I am trying to help a guy on another forum to get his holley to run right. He is telling me he's is running this wide band with an O2 sensor. I'm not familiar with it but the guy is all hung up on what it is telling him his A/F ratios are. Get this....he is running 72 primary jets and 66 in the back!!! He is telling me it's running rich at WOT!!! lol


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post #2 of 20 (permalink) Old Jul 15th, 09, 05:12 PM
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Re: What do you think of wide band '02???

Quote:
Originally Posted by dubs68camaro View Post
I am trying to help a guy on another forum to get his holley to run right. He is telling me he's is running this wide band with an O2 sensor. I'm not familiar with it but the guy is all hung up on what it is telling him his A/F ratios are. Get this....he is running 72 primary jets and 66 in the back!!! He is telling me it's running rich at WOT!!! lol
I love my wideband aem...
Whats is this guys a/f ratio at wot?
Perhaps he has a power valve in the secondary block and someone hogged out the pv channel restrictors and then attempted to lean out with a smaller jet size to compensate.

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post #3 of 20 (permalink) Old Jul 15th, 09, 05:17 PM Thread Starter
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Re: What do you think of wide band '02???

Get this....he has a PV plug. That thing should be super lean at WOT.


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post #4 of 20 (permalink) Old Jul 15th, 09, 05:28 PM
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Re: What do you think of wide band '02???

Whats his version of rich at wot??

George
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post #5 of 20 (permalink) Old Jul 15th, 09, 06:34 PM
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Re: What do you think of wide band '02???

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Whats his version of rich at wot??
Not trying to high jack this thread but im still getting this thing dialed in and i love this tool.

Hey George out of curiosity,
I have an Innovate AFR meter and at idle it is 14-14.5 at cruise its at 13's to 14 and at WOT if i can hold it that long it goes from smashing the throttle at 10.8 and at about 6,000rpms it leans out to 13.2.....

Some times when i see a lean spike it hits 16.0 but thats at low RPM and when i get that hesitation when im releasing the clutch. I think its my accelerator pump.

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post #6 of 20 (permalink) Old Jul 15th, 09, 07:25 PM
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Re: What do you think of wide band '02???

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Originally Posted by Skeeter55 View Post
Not trying to high jack this thread but im still getting this thing dialed in and i love this tool.

Hey George out of curiosity,
I have an Innovate AFR meter and at idle it is 14-14.5 at cruise its at 13's to 14 and at WOT if i can hold it that long it goes from smashing the throttle at 10.8 and at about 6,000rpms it leans out to 13.2.....

Some times when i see a lean spike it hits 16.0 but thats at low RPM and when i get that hesitation when im releasing the clutch. I think its my accelerator pump.
Skip..you have a big cam in a daily driver..not really low rpm friendly.
You have enough pump shot.Your #,s look good aside from your wot a/f.
Naturally aspirated ..I would shoot for 12.5/1 af ratio at wot.

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post #7 of 20 (permalink) Old Jul 15th, 09, 07:41 PM
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Re: What do you think of wide band '02???

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Originally Posted by fatblock View Post
Skip..you have a big cam in a daily driver..not really low rpm friendly.
You have enough pump shot.Your #,s look good aside from your wot a/f.
Naturally aspirated ..I would shoot for 12.5/1 af ratio at wot.
Thank you George, im still trying to get full throttle its about 90% fully opened... I may make a call to Patrick to pick his brain again on that WOT and my hesitation that spikes up to 16.0 when im releasing the clutch. The WOT may be closer to 12.8 but heck its kinda hard watching it when your at 120mph.... My primaries are 84 and my secondaries are 92 its flowing 972cfm on a 4150 holly 1000hp.

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post #8 of 20 (permalink) Old Jul 15th, 09, 07:48 PM
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Re: What do you think of wide band '02???

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Originally Posted by Skeeter55 View Post
Thank you George, im still trying to get full throttle its about 90% fully opened... I may make a call to Patrick to pick his brain again on that WOT and my hesitation that spikes up to 16.0 when im releasing the clutch. The WOT may be closer to 12.8 but heck its kinda hard watching it when your at 120mph.... My primaries are 84 and my secondaries are 92 its flowing 972cfm on a 4150 holly 1000hp.

Could the hesitations be the transition from primary accell pump shot and the power valve taking over? PV kicking in too late?

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post #9 of 20 (permalink) Old Jul 15th, 09, 07:57 PM
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Re: What do you think of wide band '02???

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Could the hesitations be the transition from primary accell pump shot and the power valve taking over? PV kicking in too late?
Yes very true... My power valve is a 6.5 so should i go with a 8 PV.

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post #10 of 20 (permalink) Old Jul 15th, 09, 08:19 PM
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Re: What do you think of wide band '02???

At low rpm with a big cam/minimal intake vacuum and limited signal to the carb..the main ckt is not engaged until there is sufficient pressure drop in the boosters to start the syphoning effect.With no flow from the main well thru the boosters..opening the power valve sooner will increase main well head pressure perhaps..but will not enrichen until flow is initiated.

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post #11 of 20 (permalink) Old Jul 15th, 09, 08:24 PM
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Re: What do you think of wide band '02???

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Originally Posted by fatblock View Post
At low rpm with a big cam/minimal intake vacuum and limited signal to the carb..the main ckt is not engaged until there is sufficient pressure drop in the boosters to start the syphoning effect.With no flow from the main well thru the boosters..opening the power valve sooner will increase main well head pressure perhaps..but will not enrichen until flow is initiated.
George i have about 10-12" of vacuum at 900rpm's what can i do to richen up this lean stumble at about 1300rpm's as i am releasing the clutch... At least i know now its a lean stumble/hesitation..

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post #12 of 20 (permalink) Old Jul 15th, 09, 08:26 PM
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Re: What do you think of wide band '02???

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Originally Posted by dubs68camaro View Post
I am trying to help a guy on another forum to get his holley to run right. He is telling me he's is running this wide band with an O2 sensor. I'm not familiar with it but the guy is all hung up on what it is telling him his A/F ratios are. Get this....he is running 72 primary jets and 66 in the back!!! He is telling me it's running rich at WOT!!! lol
Have you heared anything from your buddy.

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post #13 of 20 (permalink) Old Jul 15th, 09, 08:51 PM
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Re: What do you think of wide band '02???

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Originally Posted by Skeeter55 View Post
George i have about 10-12" of vacuum at 900rpm's what can i do to richen up this lean stumble at about 1300rpm's as i am releasing the clutch... At least i know now its a lean stumble/hesitation..
Skip..its vehicle specific and no one can tell you with any accuracy.You are not on the main ckt at 1300 rpm with your application.Rule that out.
You idle on the curb port and rely on the ifr,s/low speed air bleeds and a pump shot to transistion smoothly to the main ckt.Which one is giving you the fits??You may not like me for this..but I bet it is all in your left leg.That roller big block is just not happy at low rpm and will require you to slide the clutch out off the traffic light and keep the revs up.

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post #14 of 20 (permalink) Old Jul 15th, 09, 09:04 PM
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Re: What do you think of wide band '02???

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Skip..its vehicle specific and no one can tell you with any accuracy.You are not on the main ckt at 1300 rpm with your application.Rule that out.
You idle on the curb port and rely on the ifr,s/low speed air bleeds and a pump shot to transistion smoothly to the main ckt.Which one is giving you the fits??You may not like me for this..but I bet it is all in your left leg.That roller big block is just not happy at low rpm and will require you to slide the clutch out off the traffic light and keep the revs up.
Yeah you are correct about the clutch, i even rolled the clutch in and back out with the rpm's rising and it helps (because i could watch my Innovate AFR meter and when i see it starting to lean out i can give it more fuel or double clutch it so it smooths out.. But i know it can be better because at one time i almost got reed of the stumble. I guess i need to keep playing with it and maybe the air bleeds going from 76 to 84 might be to much.

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post #15 of 20 (permalink) Old Jul 15th, 09, 09:54 PM Thread Starter
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Re: What do you think of wide band '02???

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Have you heared anything from your buddy.
I've been trying to type for an hour but you hijacked the thread ya cyber terrorist!!! lol

It's late enough that the East Coast is in bed I think. Maybe he doesn't like the fact that I said when all else fails....read those plugs!!!

Just how accurate are those A/F sensors? Is there a % margin of error? Do you put the sensor in the collector?


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