My VAFC2 + LC-1 wideband Tuning
10-11-2009, 07:21 PM
#1
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My VAFC2 + LC-1 wideband Tuning
Current tuning Setup:
-Innovate LC-1 (wideband)
-VAFC2
Current Performance:
-00vi w/DEK injectors
-Warpspeed y pipe w/wideband bung
-Automatic transmission
Runs are in 2nd gear, starting as close to 3000k and ending in 5100rpms.
Notice the lean spikes in the 3k-4k area. Looks like i took out a bit too much fuel there. (I know RPM isn't shown but the log ranges from 3k-5100rpm, so just estimate) I think i need to move some fuel points in the VAFC2 to the low end and spread out the top. Mid range seems to be more sensitive to the larger injectors and not interpolating between points well enough.
BTW, im not done. I had to get out of there after 8 runs with a snapped b pipe to avoid attention. good tuning practice though.
-Innovate LC-1 (wideband)
-VAFC2
Current Performance:
-00vi w/DEK injectors
-Warpspeed y pipe w/wideband bung
-Automatic transmission
Runs are in 2nd gear, starting as close to 3000k and ending in 5100rpms.
Notice the lean spikes in the 3k-4k area. Looks like i took out a bit too much fuel there. (I know RPM isn't shown but the log ranges from 3k-5100rpm, so just estimate) I think i need to move some fuel points in the VAFC2 to the low end and spread out the top. Mid range seems to be more sensitive to the larger injectors and not interpolating between points well enough.
BTW, im not done. I had to get out of there after 8 runs with a snapped b pipe to avoid attention. good tuning practice though.
Last edited by shadyonedeath; 10-11-2009 at 07:57 PM.
10-11-2009, 09:15 PM
#3
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ill get that for you in a bit, i need to go outside and write it down.
3100 - (-7)
3300 - (-8)
3500 - (-9)
3700 - (-9)
3900 - (-10)
4100 - (-10)
4300 - (-11)
4500 - (-11)
4700 - (-11)
4900 - (-11)
5000 - (-11)
5100 - (-11)
I think those two lean spikes in the beginning are the -9's.
3100 - (-7)
3300 - (-8)
3500 - (-9)
3700 - (-9)
3900 - (-10)
4100 - (-10)
4300 - (-11)
4500 - (-11)
4700 - (-11)
4900 - (-11)
5000 - (-11)
5100 - (-11)
I think those two lean spikes in the beginning are the -9's.
Last edited by shadyonedeath; 10-11-2009 at 09:25 PM.
10-11-2009, 09:41 PM
#4
Cool I think the most I've taken away is -5. That was all guessing though. Ive been looking around for a thread like this to give me an idea how much fuel I need to remove but couldnt find one. Good info and keep us updated. Are you planning on dynoing anytime soon?
10-11-2009, 10:26 PM
#5
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You're on a 3.5 and 290cc injectors, correct? Would the 3.5 affect AFR compared to my 3.0?
TBH, I dont know if it would be safe to use my fuel corrections. Im assuming you dont have a wideband, did you get your AF from a dyno? Was their wideband stuck in your muffler? (which would give you a leaner read out)
Ill update Thursday when my catback gets put in. I decided to just go ahead with a crimp setup since NA doesn't really gain much from the b pipe. Once thats done, ill tune 3k-6500rpm.
TBH, I dont know if it would be safe to use my fuel corrections. Im assuming you dont have a wideband, did you get your AF from a dyno? Was their wideband stuck in your muffler? (which would give you a leaner read out)
Ill update Thursday when my catback gets put in. I decided to just go ahead with a crimp setup since NA doesn't really gain much from the b pipe. Once thats done, ill tune 3k-6500rpm.
10-12-2009, 08:22 AM
#6
You're on a 3.5 and 290cc injectors, correct? Would the 3.5 affect AFR compared to my 3.0?
TBH, I dont know if it would be safe to use my fuel corrections. Im assuming you dont have a wideband, did you get your AF from a dyno? Was their wideband stuck in your muffler? (which would give you a leaner read out)
Ill update Thursday when my catback gets put in. I decided to just go ahead with a crimp setup since NA doesn't really gain much from the b pipe. Once thats done, ill tune 3k-6500rpm.
TBH, I dont know if it would be safe to use my fuel corrections. Im assuming you dont have a wideband, did you get your AF from a dyno? Was their wideband stuck in your muffler? (which would give you a leaner read out)
Ill update Thursday when my catback gets put in. I decided to just go ahead with a crimp setup since NA doesn't really gain much from the b pipe. Once thats done, ill tune 3k-6500rpm.
10-12-2009, 01:54 PM
#8
You're on a 3.5 and 290cc injectors, correct? Would the 3.5 affect AFR compared to my 3.0?
TBH, I dont know if it would be safe to use my fuel corrections. Im assuming you dont have a wideband, did you get your AF from a dyno? Was their wideband stuck in your muffler? (which would give you a leaner read out)
Ill update Thursday when my catback gets put in. I decided to just go ahead with a crimp setup since NA doesn't really gain much from the b pipe. Once thats done, ill tune 3k-6500rpm.
TBH, I dont know if it would be safe to use my fuel corrections. Im assuming you dont have a wideband, did you get your AF from a dyno? Was their wideband stuck in your muffler? (which would give you a leaner read out)
Ill update Thursday when my catback gets put in. I decided to just go ahead with a crimp setup since NA doesn't really gain much from the b pipe. Once thats done, ill tune 3k-6500rpm.
AJ has a super flat A/F line, it acutally kind of wierd.
10-13-2009, 08:39 PM
#9
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Would it be possible to EASILY wire up my Transmission control to let me hold a certain gear? I've remember people making manu-matic boxes that are controlled by the cruis control buttons but that was long ago.
I want to be able to hold 2nd or 3rd without it down shifting at WOT to tune below 3k @ WOT.
I want to be able to hold 2nd or 3rd without it down shifting at WOT to tune below 3k @ WOT.
10-16-2009, 10:08 AM
#10
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Slight confusion. I managed to get a smooth 13.5-13.8 AFR in 2nd gear but when I tested it in 3rd, my AFR dropped to 12's.
Do I really want the most power in 3rd? Or should I stick with 13's in 2nd?
Do I really want the most power in 3rd? Or should I stick with 13's in 2nd?
10-16-2009, 04:22 PM
#12
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Im just comparing data. Like i said, after completing street tuning in 2nd, i got a nice flat 13.4-13.8 AFR line, but when i logged the data in a 3rd gear pull, it came out in the 12's.
10-16-2009, 08:37 PM
#13
That means I'll be going 100mph before my datalog is over...
Good luck on your tuning man it's fun stuff
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