salating
08-19-2008, 11:32 PM
Wideband Used
I use a Zeitronix Wideband System.
http://www.zeitronix.com/Products/zt2/zt2.htm
You can use whatever you want as long as you can data log.
Software Used
http://www.eecanalyzer.net/product_info/binary_editor.html
Tuning File Used
http://www.rangercustom.com/tuning.xls
This is what the guy who helped me used to tune my truck.
File was created by caroth.
http://rothfam.com/maf/salating/
Explanation
If you look at the first and second try sheets it shows volts in increments of .1 from 0 volts to 5 volts and the current flow rating in lb/min that the MAF thinks I am pulling in. He took the data I sent him and entered the AFR at that those voltages. You have to average the AF ratios for each voltage.
The desired AFR was 12.0. So in the corrected flow column is where your new lb/min values are calculated to get as close to 12.0. You would new enter those new values into the lb/min column in your tune for your MAF.
Before you go to data log
To make tuning a ton easier put a piece of screen right after the MAF to straighten the air flow out since the turbo causes it to swirl, it will make tuning more difficult when going through data. Also force your ecu into open loop so that the o2 sensor is not correcting the AFR. It is a lot easier to tune when the 02 sensor is not making changes.
Data logging
To data log and make it easier to tune, you want to get an idle to 2.0v on the MAF. Easiest way to do that it let the truck get up to temp and slowly increase the rpms will you see the data logger pull 2.0v.
Then get some data from the 1.3v to 2.6v range. You can do this in 2nd gear pretty easily.
Then get some 3rd and 4th gear WOT pulls.
Once you have all of your new values, enter those into the MAF Transfer function table and smooth out the curve my adjusting the lb/min values. You have to be careful doing this especially if you do not have a good idea on what you are doing.
Then go data log some more and do the same thing till you are running close to 12.0 AFR.
Once it’s close to 12.0 AFR change the open loop value back to 0 so the 02 sensor can make changes. Go data log and see where you are at and make changes accordingly.
There is a lot more to doing this, this is a very basic write up to give you an idea. I don’t expect everyone to understand it. It takes time to learn. But I will help as needed for those who are willing to learn and do things right.
The tuning procedures herein are Copyright of Caroth and used with his permission. Any duplication or redistribution of this material is subject to Caroths express consent. Published by Salating in conjunction with Caroth and under Fair Use.
I use a Zeitronix Wideband System.
http://www.zeitronix.com/Products/zt2/zt2.htm
You can use whatever you want as long as you can data log.
Software Used
http://www.eecanalyzer.net/product_info/binary_editor.html
Tuning File Used
http://www.rangercustom.com/tuning.xls
This is what the guy who helped me used to tune my truck.
File was created by caroth.
http://rothfam.com/maf/salating/
Explanation
If you look at the first and second try sheets it shows volts in increments of .1 from 0 volts to 5 volts and the current flow rating in lb/min that the MAF thinks I am pulling in. He took the data I sent him and entered the AFR at that those voltages. You have to average the AF ratios for each voltage.
The desired AFR was 12.0. So in the corrected flow column is where your new lb/min values are calculated to get as close to 12.0. You would new enter those new values into the lb/min column in your tune for your MAF.
Before you go to data log
To make tuning a ton easier put a piece of screen right after the MAF to straighten the air flow out since the turbo causes it to swirl, it will make tuning more difficult when going through data. Also force your ecu into open loop so that the o2 sensor is not correcting the AFR. It is a lot easier to tune when the 02 sensor is not making changes.
Data logging
To data log and make it easier to tune, you want to get an idle to 2.0v on the MAF. Easiest way to do that it let the truck get up to temp and slowly increase the rpms will you see the data logger pull 2.0v.
Then get some data from the 1.3v to 2.6v range. You can do this in 2nd gear pretty easily.
Then get some 3rd and 4th gear WOT pulls.
Once you have all of your new values, enter those into the MAF Transfer function table and smooth out the curve my adjusting the lb/min values. You have to be careful doing this especially if you do not have a good idea on what you are doing.
Then go data log some more and do the same thing till you are running close to 12.0 AFR.
Once it’s close to 12.0 AFR change the open loop value back to 0 so the 02 sensor can make changes. Go data log and see where you are at and make changes accordingly.
There is a lot more to doing this, this is a very basic write up to give you an idea. I don’t expect everyone to understand it. It takes time to learn. But I will help as needed for those who are willing to learn and do things right.
The tuning procedures herein are Copyright of Caroth and used with his permission. Any duplication or redistribution of this material is subject to Caroths express consent. Published by Salating in conjunction with Caroth and under Fair Use.