06 LS2 to LS7 MAF conversion. HP Tuner File
07-07-2016, 03:59 PM
#1
07 LS2 to LS7 MAF conversion. HP Tuner File
Hi I have converted my ls2 intake to a ls7 k&N intake system with the ls7 slotted MAF sensor. So far I uploaded the MAF tables and IAT tables of the Z06.
The car starts but the AFR is kindof High. Also I attached my HP Tuner file of idol and driving slow down the road. The car wasnt doing good and I am worried i did damage. Can someone take a look at this log and give some guidence on what to do. I included a AFR error chart too in the log, Also wideband is in the log
The car starts but the AFR is kindof High. Also I attached my HP Tuner file of idol and driving slow down the road. The car wasnt doing good and I am worried i did damage. Can someone take a look at this log and give some guidence on what to do. I included a AFR error chart too in the log, Also wideband is in the log
Last edited by orripid; 07-08-2016 at 09:17 AM. Reason: updated scan after adjusting maf tables up 12%
07-07-2016, 04:05 PM
#2
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St. Jude Donor '15
You aren't going to hurt anything just driving around no matter how bad the MAF curve is
I'd increase the whole MAF curve by say 12% to get closer to the ballpark. Fuel trims are really high.
I'd increase the whole MAF curve by say 12% to get closer to the ballpark. Fuel trims are really high.
07-07-2016, 04:09 PM
#3
I attached the tune as well. Any help would be much appreciated.
So to get this right. If i raise the MAF tables I get more fuel less air?
Also I added the afr err chart can this help me tune my maf?
07-07-2016, 04:12 PM
#4
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St. Jude Donor '15
Charts aren't included in logs so I can't see what you're using
Yes, higher MAF = richer, lower MAF = leaner.
Fuel trims will try to bring AFR to ~14.7:1 if you are in closed loop (which you are, most of the time), so don't expect to change the MAF table 10% and then everything move richer 10% everywhere all the time.
Yes, higher MAF = richer, lower MAF = leaner.
Fuel trims will try to bring AFR to ~14.7:1 if you are in closed loop (which you are, most of the time), so don't expect to change the MAF table 10% and then everything move richer 10% everywhere all the time.
Last edited by schpenxel; 07-07-2016 at 04:17 PM.
07-07-2016, 04:17 PM
#5
Charts aren't included in logs so I can't see what you're using
Yes, higher MAF = richer, lower MAF = leaner.
Fuel trims will try to bring AFR to ~14.7:1 if you are in closed loop (which you are, most of the time), so don't expect to change the MAF table 10% and then everything move richer 10% everywhere.
Yes, higher MAF = richer, lower MAF = leaner.
Fuel trims will try to bring AFR to ~14.7:1 if you are in closed loop (which you are, most of the time), so don't expect to change the MAF table 10% and then everything move richer 10% everywhere.
Also I can make a new log what would you recommend i add to the charts to help tune this?
07-07-2016, 04:19 PM
#6
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St. Jude Donor '15
Add dynamic airflow and idle adapt advance.
The log is just the data that is recorded.. it doesn't include charts/graphs/etc. Those are stored in a separate file called a layout. I have my own that I am looking at.
The log is just the data that is recorded.. it doesn't include charts/graphs/etc. Those are stored in a separate file called a layout. I have my own that I am looking at.
07-07-2016, 04:21 PM
#7
Would you like me to attach the layout?
07-07-2016, 04:22 PM
#8
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St. Jude Donor '15
Not needed
07-07-2016, 06:46 PM
#9
07-07-2016, 10:41 PM
#10
Safety Car
As long as you are driving around in closed loop you aren't going to hurt a thing. Just make adjustments based on what you're seeing your fuel trims do in the logs.
07-07-2016, 11:58 PM
#11
If I have my fuel trim logs , what would be my first step on how to use that data to make adjustments ?
your help is greatly appretiated
07-08-2016, 12:22 AM
#12
Safety Car
First off, setup your scanner using schpenxel's guides here:
http://www.hptuners.com/forum/showth...tarted-Threads
Then the short story is that you'll want to take your fuel trim data from the maf graph and apply it to the maf curve. You'll want to multiply by the trim percentage. You want to multiply by 1+trim%, so if your trim in the cell you are trying to modify is 15%, you'll multiply by 1.15 (richen it up), if it's -15 you'll mulitply by .85 (lean it out).
You can just copy the data from the graph and go to paste special>multiply by percent but this can lead to a pretty spikey maf curve so I generally just look for trends in the data and do it by hand.
Ideally you'd be gathering data with a tune that has dfco and cfco disabled and disable ltfts in either the tune or the scanner; and then you'd apply a filter to the data to get steady state data which is actually good to tune with. Keep in mind this is only good for part throttle tuning. Wot tuning really requires a wideband.
The hptuners site is an amazing resource with alot of sharp people so I'd definitely head over there as well.
http://www.hptuners.com/forum/showth...tarted-Threads
Then the short story is that you'll want to take your fuel trim data from the maf graph and apply it to the maf curve. You'll want to multiply by the trim percentage. You want to multiply by 1+trim%, so if your trim in the cell you are trying to modify is 15%, you'll multiply by 1.15 (richen it up), if it's -15 you'll mulitply by .85 (lean it out).
You can just copy the data from the graph and go to paste special>multiply by percent but this can lead to a pretty spikey maf curve so I generally just look for trends in the data and do it by hand.
Ideally you'd be gathering data with a tune that has dfco and cfco disabled and disable ltfts in either the tune or the scanner; and then you'd apply a filter to the data to get steady state data which is actually good to tune with. Keep in mind this is only good for part throttle tuning. Wot tuning really requires a wideband.
The hptuners site is an amazing resource with alot of sharp people so I'd definitely head over there as well.
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orripid (07-08-2016)
07-08-2016, 12:56 AM
#13
First off, setup your scanner using schpenxel's guides here:
http://www.hptuners.com/forum/showth...tarted-Threads
Then the short story is that you'll want to take your fuel trim data from the maf graph and apply it to the maf curve. You'll want to multiply by the trim percentage. You want to multiply by 1+trim%, so if your trim in the cell you are trying to modify is 15%, you'll multiply by 1.15 (richen it up), if it's -15 you'll mulitply by .85 (lean it out).
You can just copy the data from the graph and go to paste special>multiply by percent but this can lead to a pretty spikey maf curve so I generally just look for trends in the data and do it by hand.
Ideally you'd be gathering data with a tune that has dfco and cfco disabled and disable ltfts in either the tune or the scanner; and then you'd apply a filter to the data to get steady state data which is actually good to tune with. Keep in mind this is only good for part throttle tuning. Wot tuning really requires a wideband.
The hptuners site is an amazing resource with alot of sharp people so I'd definitely head over there as well.
http://www.hptuners.com/forum/showth...tarted-Threads
Then the short story is that you'll want to take your fuel trim data from the maf graph and apply it to the maf curve. You'll want to multiply by the trim percentage. You want to multiply by 1+trim%, so if your trim in the cell you are trying to modify is 15%, you'll multiply by 1.15 (richen it up), if it's -15 you'll mulitply by .85 (lean it out).
You can just copy the data from the graph and go to paste special>multiply by percent but this can lead to a pretty spikey maf curve so I generally just look for trends in the data and do it by hand.
Ideally you'd be gathering data with a tune that has dfco and cfco disabled and disable ltfts in either the tune or the scanner; and then you'd apply a filter to the data to get steady state data which is actually good to tune with. Keep in mind this is only good for part throttle tuning. Wot tuning really requires a wideband.
The hptuners site is an amazing resource with alot of sharp people so I'd definitely head over there as well.
07-08-2016, 08:30 AM
#14
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St. Jude Donor '15
It is safe to drive; if it's in closed loop it's next to impossible to hurt anything at lower RPM / loads
Not sure what you mean by o2 sensors seem a bit crazy? They are supposed to oscillate from ~800mV to ~100mV which is exactly what they are doing
Next step is to get more data.. you can't fix a whole MAF curve at idle. So, start driving around and logging.
Follow my DIY for setting up a MAF Fuel trim graph. That will tell you how much each cell of your MAF curve needs to increase or decrease. Keep the MAF curve smooth.. you can look at it in graph view to see what it actually looks like. It should not have any weird spikes up or down or anything like that. It should be more or less like the shape the factory curve has..
Last edited by schpenxel; 07-08-2016 at 08:32 AM.
07-08-2016, 09:16 AM
#15
Fuel trims actually look pretty decent in that log
It is safe to drive; if it's in closed loop it's next to impossible to hurt anything at lower RPM / loads
Not sure what you mean by o2 sensors seem a bit crazy? They are supposed to oscillate from ~800mV to ~100mV which is exactly what they are doing
Next step is to get more data.. you can't fix a whole MAF curve at idle. So, start driving around and logging.
Follow my DIY for setting up a MAF Fuel trim graph. That will tell you how much each cell of your MAF curve needs to increase or decrease. Keep the MAF curve smooth.. you can look at it in graph view to see what it actually looks like. It should not have any weird spikes up or down or anything like that. It should be more or less like the shape the factory curve has..
It is safe to drive; if it's in closed loop it's next to impossible to hurt anything at lower RPM / loads
Not sure what you mean by o2 sensors seem a bit crazy? They are supposed to oscillate from ~800mV to ~100mV which is exactly what they are doing
Next step is to get more data.. you can't fix a whole MAF curve at idle. So, start driving around and logging.
Follow my DIY for setting up a MAF Fuel trim graph. That will tell you how much each cell of your MAF curve needs to increase or decrease. Keep the MAF curve smooth.. you can look at it in graph view to see what it actually looks like. It should not have any weird spikes up or down or anything like that. It should be more or less like the shape the factory curve has..
Here is the log of the drive into work.
I had a few AFR spikes.
Can you tell me what you think?
I was going to manually update it as schpenxel explained. Do you know where I can turn off the LTFT settings to make sure i am tunning accurate data?
Also If you have any info on where i can find your DIY for setting up a MAF Fuel trim.
Last edited by orripid; 07-08-2016 at 09:16 AM.
07-08-2016, 09:17 AM
#16
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St. Jude Donor '15
http://www.hptuners.com/forum/showth...er-V3&p=419231
No need to disable LTFT's. HPT has a parameter built in that combines STFT and LTFT's together, so just use that (shown in DIY)
No need to disable LTFT's. HPT has a parameter built in that combines STFT and LTFT's together, so just use that (shown in DIY)
Last edited by schpenxel; 07-08-2016 at 09:18 AM.
07-08-2016, 09:22 AM
#17
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St. Jude Donor '15
Here is a MAF Fuel trim one I made real quick.
07-08-2016, 09:34 AM
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07-08-2016, 09:41 AM
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St. Jude Donor '15
Right click inside graphs, click on graph Layout. In the window that pops up go to open layout file at the top, then open that file.
I also said "here is a MAF fuel trim one"... so pretty sure that means it's a MAF fuel trim graph
I also said "here is a MAF fuel trim one"... so pretty sure that means it's a MAF fuel trim graph
Last edited by schpenxel; 07-08-2016 at 09:43 AM.
07-08-2016, 09:43 AM
#20