So I am to the point where I have the wideband and need to start heavy tuning for my car. I am reading the stickies about maf tuning, and at this point need a good, and accurate starting point.

I have received a bin file, and an xdf file from a very helpful member which I plan on using, but he has modified these files so what I see in the stickies isn't exactly what I see when I look into tuner pro.

I am looking for an accurate and stock bin and xdf for my 86 corvette. From what I read, I want to go with arap since my car is an auto, and need the 6E definition file.

I have downloaded these files from tunerpro's website, and also from moates.net. I was instructed that for whatever reason these files weren't correct. So if I could have someone point me in the direction, or send me a correct file that they know is good, I can them work from there. Who knows, maybe it is my tunerpro program that isn't working correctly.

Thanks,
Craig

 

For a -86 stock *.bin you need a def file called 32.xdf
( 87-88 its 32B)
(89 its 6E )

But why dont you start with ARAP and 6E.xdf?

 

That's kind of what my plan. I have been reading, and basically what I understand is that the 6e is the best you can get. My problem is relating the 6e to the stickies. I have read through the maf tunning articles by funstick, and I think he used 32. So what I am trying to do is to actually get familiar with those tables, and then work from there.

I think I am capable of starting with 6e if I just learn some more table explanations. Then I can work from there.

 

funstck was using the PW tables in $32, which do not exist in $6E. Look for the MAF articles on the scalar tables. They will be what you will need to update for tuning the PW vs airflow.

RBob.

 

I will look into that. Thanks!

 

Are you referring to the MAF scaler tables?

 

I would start with understanding the MAF tables (1-6) in the "Tables / Functions" section of TunerPro; how each MAF sensor voltage reading corresponds to a particular airflow. For example, in MAF table 1, 1.46 volts corresponds to 22.28 grms/sec of airflow. The ECM will fuel according to that airflow #. If you were to change 22.28 to, say, 19, then the ECM would "think" there is less airflow at that voltage of 1.46 and therefore give less fuel at that particular voltage. There is definitely more to it, but that is how the tables basically work.

The scalar tables in the "Constants / Scalars" section are a little more advanced and likely don't need to be touched at this point. Those figures are much like "multipliers" for the MAF tables, though I don't have the exact formula.

 

Yes, the tables that 87 posted about. There are some additions to what he posted (which is why the articles), but the correct tables, and correct info.

Rbob.

 

Hey thanks guys. I have read maf articles about ten times now. I think I will start with table one, and adjust the numbers to see how they effect idle. From there I think I can work into my trouble areas, which by just driving the car I figure is in table 5 or table 6.

I guess I will find out on my own, but I thought i would ask. Do you guys typically change the values by a certain % across the table whether you are lean or rich or change individual values?

Thanks again guys!

Craig

 

Generally speaking, I like to pinpoint the individual areas where it is either rich or lean, make the adjustment for that value(s), and then smooth the adjacent values out a bit. So if I need to make a 7% adjustment for a certain airflow at a particular voltage, I'll also adjust maybe 1 or 2 fields above and below by a lesser percentage, in order to keep a smooth "curve".