check out my vafc settings after wideband install
01-20-2004, 06:20 PM
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check out my vafc settings after wideband install
I got my wideband in today and was able to fine tune my vafc settings. I have a 99 si with a vortech supercharger at 8 psi with 440 injectors.
Before the wideband, settings were as follows
rpm low & high
1000 -40
1500 -40
2000 -39
2500 -39
3000 -38
3500 -38
4000 -37
4500 -37
and so on....you get the point
and i was gettin a high of .53 bar on my vafc...stayin around .49 as a high most of the time.
With the wideband here are my street tuned settings
rpm low hi
1000 -47 -40
1500 -46 -41
2000 -43 -41
2500 -43 -41
3000 -43 -41
3500 -43 -40
4000 -42 -40
4500 -41 -40
5000 -39 -39
5500 -39 -39
6000 -39 -39
7000 -40 -40
8000 -40 -41
9000 -42 -42
now i am gettin a high of .55 bar.
these settings yeild me about 14.5 out of boost and 12-12.5 in boost with it goin to about 10.5 at 7500rmp.
I was very suprised at how much i was able to lean it out in the high rpm's. When i first got the wideband in and took it for a test drive, from 4000 on at full throtel, the wideband just said rich. as rich as it goes is 10.0:1. I feel like i picked up quite a bit of top end power, and im not really gettin traction at all in 2nd (shitty tires)
Anyway, i just wanted to share
Before the wideband, settings were as follows
rpm low & high
1000 -40
1500 -40
2000 -39
2500 -39
3000 -38
3500 -38
4000 -37
4500 -37
and so on....you get the point
and i was gettin a high of .53 bar on my vafc...stayin around .49 as a high most of the time.
With the wideband here are my street tuned settings
rpm low hi
1000 -47 -40
1500 -46 -41
2000 -43 -41
2500 -43 -41
3000 -43 -41
3500 -43 -40
4000 -42 -40
4500 -41 -40
5000 -39 -39
5500 -39 -39
6000 -39 -39
7000 -40 -40
8000 -40 -41
9000 -42 -42
now i am gettin a high of .55 bar.
these settings yeild me about 14.5 out of boost and 12-12.5 in boost with it goin to about 10.5 at 7500rmp.
I was very suprised at how much i was able to lean it out in the high rpm's. When i first got the wideband in and took it for a test drive, from 4000 on at full throtel, the wideband just said rich. as rich as it goes is 10.0:1. I feel like i picked up quite a bit of top end power, and im not really gettin traction at all in 2nd (shitty tires)
Anyway, i just wanted to share
01-20-2004, 06:21 PM
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Re: check out my vafc settings after wideband install (slammin86)
Nice work. Looks like you really cleaned up the top end. Those things are worth every penny!
01-20-2004, 06:27 PM
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Re: check out my vafc settings after wideband install (slammin86)
Why are you keeping it so rich (10.5) from 7500 on up? I thought you could safely run it at about 12.0 to redline and pick up some more top end. Just curious.
01-20-2004, 06:27 PM
#4
Re: check out my vafc settings after wideband install (mctonyb)
Cool, just ordered the parts to make a WB. How is the A/F under part throttle/ part boost? What was your tuning method and how long did it take? any other changes you have noticed? Thanks!
01-21-2004, 02:50 PM
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Re: check out my vafc settings after wideband install (tjbizzo)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tjbizzo »</TD></TR><TR><TD CLASS="quote">Why are you keeping it so rich (10.5) from 7500 on up? I thought you could safely run it at about 12.0 to redline and pick up some more top end. Just curious. </TD></TR></TABLE>
Cause i was gettin tired that night so i stopped messing with it.
my new top end settings are as follows
4500 -40
5000 -40
5500 -40
6000 -42
7000 -44
8000 -47
9000 -47
as you can see there was still room for improvement.....lol
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Bailhatch »</TD></TR><TR><TD CLASS="quote">Cool, just ordered the parts to make a WB. How is the A/F under part throttle/ part boost? What was your tuning method and how long did it take? any other changes you have noticed? Thanks!</TD></TR></TABLE>
ive just been tweakin it as i drive....the main change i noticed is more traction problems...lol
Cause i was gettin tired that night so i stopped messing with it.
my new top end settings are as follows
4500 -40
5000 -40
5500 -40
6000 -42
7000 -44
8000 -47
9000 -47
as you can see there was still room for improvement.....lol
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Bailhatch »</TD></TR><TR><TD CLASS="quote">Cool, just ordered the parts to make a WB. How is the A/F under part throttle/ part boost? What was your tuning method and how long did it take? any other changes you have noticed? Thanks!</TD></TR></TABLE>
ive just been tweakin it as i drive....the main change i noticed is more traction problems...lol
01-21-2004, 03:31 PM
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Re: check out my vafc settings after wideband install (racinskittle)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by racinskittle »</TD></TR><TR><TD CLASS="quote">damn, that's awesome! Thanks for the comparison man. I always wanted to see a before and after 
</TD></TR></TABLE>
i also did some more fine tuning on my part throtel low end settings
1000 -49
1500 -46
2000 -45
2500 -45
3000 -45
3500 -45
4000 -45
4500 -44
i still cant believe how rich i was running before
</TD></TR></TABLE>i also did some more fine tuning on my part throtel low end settings
1000 -49
1500 -46
2000 -45
2500 -45
3000 -45
3500 -45
4000 -45
4500 -44
i still cant believe how rich i was running before
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01-21-2004, 05:10 PM
#8
Re: check out my vafc settings after wideband install (slammin86)
Ya the comparison is really interesting. What is your TH% for Hi and Lo throttle?
Can you really tune the low throttle much below 60%? I thought the ecu would take over once it switched back to closed loop.
Can you really tune the low throttle much below 60%? I thought the ecu would take over once it switched back to closed loop.
01-21-2004, 05:36 PM
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Re: check out my vafc settings after wideband install (Bailhatch)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Bailhatch »</TD></TR><TR><TD CLASS="quote">Ya the comparison is really interesting. What is your TH% for Hi and Lo throttle?
Can you really tune the low throttle much below 60%? I thought the ecu would take over once it switched back to closed loop. </TD></TR></TABLE>
the crossover from low to high is 70-71%
Im not having a problem leaning it out at low throttle
Can you really tune the low throttle much below 60%? I thought the ecu would take over once it switched back to closed loop. </TD></TR></TABLE>
the crossover from low to high is 70-71%
Im not having a problem leaning it out at low throttle
01-21-2004, 06:23 PM
#10
Re: check out my vafc settings after wideband install (slammin86)
woulden't the ecu try and bring it back to a leaner (than turbo needs) AFR anyway when in closed loop?
I wonder if you can richen up the part throttle because my turbo loves to boost 1-5psi at part throttle (under 30%). or maybe I'll just set my TH to 10% & 30% or something.
I wonder if you can richen up the part throttle because my turbo loves to boost 1-5psi at part throttle (under 30%). or maybe I'll just set my TH to 10% & 30% or something.
01-22-2004, 12:46 PM
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Re: check out my vafc settings after wideband install (Bailhatch)
That 47% at 1000RPM is what really interests me. That's exactly what I was talking about. I dont think you can do that w/the DSM 450's though.
Did Idle and startup improve drastically? I have a feeling it did.
Also, ur using RC injectors right?
Did Idle and startup improve drastically? I have a feeling it did.
Also, ur using RC injectors right?
01-22-2004, 01:30 PM
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Re: check out my vafc settings after wideband install (racinskittle)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by racinskittle »</TD></TR><TR><TD CLASS="quote">That 47% at 1000RPM is what really interests me. That's exactly what I was talking about. I dont think you can do that w/the DSM 450's though.
</TD></TR></TABLE>
I'll verify that you cannot. I've got the DSM 450 "black-tops" and I have my 1000 setting to something like -25 or -17. THats what yields the smoothest idle. At around -40% my car's struggling to idle at like 300rpm-500rpm.
</TD></TR></TABLE>
I'll verify that you cannot. I've got the DSM 450 "black-tops" and I have my 1000 setting to something like -25 or -17. THats what yields the smoothest idle. At around -40% my car's struggling to idle at like 300rpm-500rpm.
01-22-2004, 02:23 PM
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Re: check out my vafc settings after wideband install (racinskittle)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by racinskittle »</TD></TR><TR><TD CLASS="quote">That 47% at 1000RPM is what really interests me. That's exactly what I was talking about. I dont think you can do that w/the DSM 450's though.
Did Idle and startup improve drastically? I have a feeling it did.
Also, ur using RC injectors right?</TD></TR></TABLE>
I am using precision 440 injectors....
my idle is now at -47...idles very very smooth at about 700 rpm
the only problem i am having is code 13......any ideas on how to get rid of this
Did Idle and startup improve drastically? I have a feeling it did.
Also, ur using RC injectors right?</TD></TR></TABLE>
I am using precision 440 injectors....
my idle is now at -47...idles very very smooth at about 700 rpm
the only problem i am having is code 13......any ideas on how to get rid of this
01-22-2004, 02:25 PM
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Re: check out my vafc settings after wideband install (GPoodle)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by GPoodle »</TD></TR><TR><TD CLASS="quote">
I'll verify that you cannot. I've got the DSM 450 "black-tops" and I have my 1000 setting to something like -25 or -17. THats what yields the smoothest idle. At around -40% my car's struggling to idle at like 300rpm-500rpm.</TD></TR></TABLE>
Yeah the 450's have some lag in them. I brought up a topic like this before and that's what was explained to me. I've actually got mine at 35% and it's not too bad right now. But i've seen both setups work.
I'll verify that you cannot. I've got the DSM 450 "black-tops" and I have my 1000 setting to something like -25 or -17. THats what yields the smoothest idle. At around -40% my car's struggling to idle at like 300rpm-500rpm.</TD></TR></TABLE>
Yeah the 450's have some lag in them. I brought up a topic like this before and that's what was explained to me. I've actually got mine at 35% and it's not too bad right now. But i've seen both setups work.
01-22-2004, 02:52 PM
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Re: check out my vafc settings after wideband install (racinskittle)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by racinskittle »</TD></TR><TR><TD CLASS="quote">
Yeah the 450's have some lag in them. I brought up a topic like this before and that's what was explained to me. I've actually got mine at 35% and it's not too bad right now. But i've seen both setups work.</TD></TR></TABLE>
the only problem i have is if i am stopped and try to hold the rpm between 2000 and 4000 rpm....if i try to do this, it cuts out on me every few seconds....do you have a similiar problem?
Yeah the 450's have some lag in them. I brought up a topic like this before and that's what was explained to me. I've actually got mine at 35% and it's not too bad right now. But i've seen both setups work.</TD></TR></TABLE>
the only problem i have is if i am stopped and try to hold the rpm between 2000 and 4000 rpm....if i try to do this, it cuts out on me every few seconds....do you have a similiar problem?
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