How to tune off a/f gauge and VAFC?
 

Alright, here's what im planning on doing. Taking a 3rd gear pull on the HWY with my POS *cough* autometer A/F gauge and then make adjustments on the A/F gauge accodingly.

Most likely close to WOT because the gauge sucks, but i need some rough tuning before i get my wideband. Innovative https://honda-tech.com/forums/images/smilies/emthup.gif

I do this at WOT correct? or would part-throttle be better?

Any help's appreciated. Thank you

Also, I was thinking a "tuning" forum might be beneficial. It may help organize stuff. But im not the one doin it so ill keep quiet https://honda-tech.com/forums/images...es/emdgust.gif

Dan

Re: How to tune off a/f gauge and VAFC (racinskittle)
 

no WOT isnt accurate at all...the only time is partially close is at steady crusing and low rpms...once you are at wot it cant take readings fast enough to come up with an accurate a/f...do NOT tune based on that $30 guage

Re: How to tune off a/f gauge and VAFC (gritsak)
 

well what should i do then? just set it at base and then dont screw with it?

thanks for the reply

Re: How to tune off a/f gauge and VAFC (racinskittle)
 

well you shouldnt really drive the car hard till its tuned...way to many people blow engines doing that....whats your setup as it sits as far and your turbo, and fuel

Re: How to tune off a/f gauge and VAFC (racinskittle)
 

Me and my friend tuned my turbo d-series with a volt meter from walmart using 3rd and 4th gear wot.....from like 2500rpms to redline, we made the o2 readings around .92 .94.....when it was dyno time we were surprised to see how accurate it was...we were almost dead nuts accurate, we had to make one small change at 4500 rpms and it was good....put down 205whp at 6psi d16 using afc hack, we still use it to re-tune all the time, found it works well.....better than payin 100 bucks every week to dyno

Trav

Re: How to tune off a/f gauge and VAFC (racinskittle)
 

I use a dynotune volt meter.. works just like any a/f gauge except instead just of saying rich or lean it gives the number of volts travelling through the o2 sensor...and based on the volts travelling through it gives the estimated a/f ratio....

ive tuned with personal experience with this and safc with my jrsc and i must say it worked fairly well.............a wideband with data logning would work much better.. but this definatly works good enough to where u can prevent blowing ur motor at relativly low boost.... 6-12psi.....
costs on average of $70

Re: How to tune off a/f gauge and VAFC (greekspeed)
 

when u tune by volts what does full rich give you??? i get .000 volts when the car is running too rich is that normal???

Re: How to tune off a/f gauge and VAFC (RexSiT3)
 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by RexSiT3 &raquo;</TD></TR><TR><TD CLASS="quote">Me and my friend tuned my turbo d-series with a volt meter from walmart using 3rd and 4th gear wot.....from like 2500rpms to redline, we made the o2 readings around .92 .94.....when it was dyno time we were surprised to see how accurate it was...we were almost dead nuts accurate, we had to make one small change at 4500 rpms and it was good....put down 205whp at 6psi d16 using afc hack, we still use it to re-tune all the time, found it works well.....better than payin 100 bucks every week to dyno</TD></TR></TABLE>

Trav[/QUOTE]

yeah same idea as this guy except mine is just an actual thing made for it... but im sure it works the same............... i tune to about .900-.940 volts which about 13.2/1 and lower

Re: How to tune off a/f gauge and VAFC (Jockobo)
 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Jockobo &raquo;</TD></TR><TR><TD CLASS="quote">when u tune by volts what does full rich give you??? i get .000 volts when the car is running too rich is that normal??? </TD></TR></TABLE>

chances are its not hooked up properly.. because the higher the volt's the mroe rich ur running.... say u are over 1.000 volt.....that would be pretty damn rich.. Around 12.5/1 a/f and lower..

if its readin .000 at idle or .0xx then dont really worry about it.... but if its doing that at wide open throttle then something is wrong with the way u hooked it up...

Re: How to tune off a/f gauge and VAFC (greekspeed)
 

Alright, thanks for the replys. I've got a fluke voltmeter. Anyway to hook that up?

LMK thanks

PS A/F will be for sale soon. I think i'll go EGT instead https://honda-tech.com/forums/images/smilies/emwink.gif

I also have a VAFC...
T3turbo .60/.63
Starion FMIC
I MAY install the Walbro but im really tempted to try it without

Re: How to tune off a/f gauge and VAFC (racinskittle)
 

a narrow band o2 (stock) can't tell the difference between 11.5:1 and 13:1 A/F. You <u>can't</u> accurately tune with it. All it really reads is around 14.7:1 A/F. Shell out $50 or so bux and make a couple dyno passes with the wideband.

Re: How to tune off a/f gauge and VAFC (legendboy)
 

Damn, it's time for me to start pouring out the stupid questions.

How would i hook up a voltmeter in my car to read the voltage off my O2 sensor?

Re: How to tune off a/f gauge and VAFC (legendboy)
 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by legendboy &raquo;</TD></TR><TR><TD CLASS="quote">a narrow band o2 (stock) can't tell the difference between 11.5:1 and 13:1 A/F. You <u>can't</u> accurately tune with it. All it really reads is around 14.7:1 A/F. Shell out $50 or so bux and make a couple dyno passes with the wideband.</TD></TR></TABLE>

well it is just a volt meter.. there are charts that give rough estimates to give estimate a/f ratio...... i use it because its cheep and as long as my shit doesnt blow im happy...........and where i live there is no access to a wide band o2 unless i order one myself.. it is usleful if ur just worried about safety...i tuned my car at 10 psi with it and have had absolutly no problems and actually helped my car run a little better tuning off the volt meter readings......

but if u really want to make the best out of ur setup then get a wideband.........but this thread was just a question about how to tune with a regular a/f gauge...not on how much better a wideband is..

https://honda-tech.com/forums/images/smilies/embeer.gif https://honda-tech.com/forums/images...s/emcocktl.gif https://honda-tech.com/forums/images/smilies/emthup.gif

Re: How to tune off a/f gauge and VAFC (legendboy)
 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by legendboy &raquo;</TD></TR><TR><TD CLASS="quote">a narrow band o2 (stock) can't tell the difference between 11.5:1 and 13:1 A/F. You <u>can't</u> accurately tune with it. All it really reads is around 14.7:1 A/F. Shell out $50 or so bux and make a couple dyno passes with the wideband.</TD></TR></TABLE>

Exactly... Look at the difference in the response curves of an OEM Honda O2 sensor and an FJO kit w/ an NTK sensor. Sure that voltmeter will be spitting out numbers, but they won't mean anything except below, at, or above stoichiometry. Off a narrowband sensor you have like a .2V change from 10:1-14.7:1. The FJO has almost 10x as much detail within the same range. You are asking for trouble if you tune off a narrowband O2 sensor. There is a big difference being at 11.5:1 and being at 14.5:1 under boost http://images.honda-tech.com/set1//smile/emcrook.gif

http://www.hondata.com/images/techfjowbo2.gif

Re: How to tune off a/f gauge and VAFC (greekspeed)
 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by greekspeed &raquo;</TD></TR><TR><TD CLASS="quote">

well it is just a volt meter.. there are charts that give rough estimates to give estimate a/f ratio...... i use it because its cheep and as long as my shit doesnt blow im happy...........and where i live there is no access to a wide band o2 unless i order one myself.. it is usleful if ur just worried about safety...i tuned my car at 10 psi with it and have had absolutly no problems and actually helped my car run a little better tuning off the volt meter readings......

but if u really want to make the best out of ur setup then get a wideband.........but this thread was just a question about how to tune with a regular a/f gauge...not on how much better a wideband is..

https://honda-tech.com/forums/images/smilies/embeer.gif https://honda-tech.com/forums/images...s/emcocktl.gif https://honda-tech.com/forums/images/smilies/emthup.gif </TD></TR></TABLE>

Thanks for your help! I pmed you https://honda-tech.com/forums/images/smilies/emthup.gif

Re: How to tune off a/f gauge and VAFC (mskibbz-T)
 

there is no question as to how much better a wideband is....... cause it is....a lot better......but not everyone is in it for the same goals.... and it really matters on what ur needs are for the project......... mine was safty at decent boost and i got it with the 02 volt meter........

Re: How to tune off a/f gauge and VAFC (mskibbz-T)
 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mskibbz-T &raquo;</TD></TR><TR><TD CLASS="quote">

Exactly... Look at the difference in the response curves of an OEM Honda O2 sensor and an FJO kit w/ an NTK sensor. Sure that voltmeter will be spitting out numbers, but they won't mean anything except below, at, or above stoichiometry. Off a narrowband sensor you have like a .2V change from 10:1-14.7:1. The FJO has almost 10x as much detail within the same range. You are asking for trouble if you tune off a narrowband O2 sensor. There is a big difference being at 11.5:1 and being at 14.5:1 under boost http://images.honda-tech.com/set1//smile/emcrook.gif

http://www.hondata.com/images/techfjowbo2.gif </TD></TR></TABLE>


Damn, but what happned with rexsti he get lucky or what?

Also, what's the accuracy on that voltmeter they tested? I'd like to know the tolerance.....


Modified by racinskittle at 11:01 PM 9/18/2003

Re: How to tune off a/f gauge and VAFC (racinskittle)
 

you might be able to get away with ghetto tuning with a volt meter like some mentioned above have...but is it really worth blowing your motor over trying

Re: How to tune off a/f gauge and VAFC (greekspeed)
 

Thanks a lot for the help greekspeed https://honda-tech.com/forums/images/smilies/emthup.gif

Re: How to tune off a/f gauge and VAFC (gritsak)
 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by gritsak &raquo;</TD></TR><TR><TD CLASS="quote">you might be able to get away with ghetto tuning with a volt meter like some mentioned above have...but is it really worth blowing your motor over trying</TD></TR></TABLE>

I know but right now no other choice https://honda-tech.com/forums/images/smilies/emsad.gif SOMEONE TEST THE INNOVATIVE WIDEBAND ALREADY!!!!

Re: How to tune off a/f gauge and VAFC (racinskittle)
 

AEM's WBO2 is pretty ass cheap, just hook up your voltmeter and you're good to go. $360 @ KS Motorsports - http://www.ks-motorsports.com/...0eacb

Re: How to tune off a/f gauge and VAFC (mskibbz-T)
 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mskibbz-T &raquo;</TD></TR><TR><TD CLASS="quote">AEM's WBO2 is pretty ass cheap, just hook up your voltmeter and you're good to go. $360 @ KS Motorsports - http://www.ks-motorsports.com/...0eacb
</TD></TR></TABLE>

Cool, thanks for the help. How's that compare to the innovative one? It doesn't look like it can do datalogging.

I think i should have researched this b4 i put the turbo on https://honda-tech.com/forums/images...s/emhammer.gif

Re: How to tune off a/f gauge and VAFC (racinskittle)
 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by racinskittle &raquo;</TD></TR><TR><TD CLASS="quote">Cool, thanks for the help. How's that compare to the innovative one? It doesn't look like it can do datalogging.

I think i should have researched this b4 i put the turbo on https://honda-tech.com/forums/images...s/emhammer.gif </TD></TR></TABLE>

I don't know anything about the Innovative one, the AEM WB02 kit is just that, a wideband O2 sensor and controller. You can have it output 0-1V to work in conjunction with a stock ECU or 0-5V for greater detail with a standalone or voltmeter or whatever. Whatever you do, plan ahead, it sucks to replace parts because you outgrow them.

Re: How to tune off a/f gauge and VAFC (mskibbz-T)
 

I know this is a dumb question, but what voltage would I be looking to tune to if I tried this, and does it change based on the RPM or boost? This is based on a stock 0-1V O2 sensor.

Re: How to tune off a/f gauge and VAFC (luti)
 

around .90 roughly (this is on the safe side)