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  • MAF tuning....low freq hz?

    Ok so I am following RussK's maf tuning guide, so far so good. The only thing I don't get is the lowest cells that I don't hit while filling the histogram at part throttle. How do I adjust these? I don't understand this part:

    For the low end of the Maf table that you didn't enter, just enter the error % from the lowest airflow hz cell that you did enter.

    From his guide. Can anybody enlighten me? Thanks!

  • #2
    Re: MAF tuning....low freq hz?

    you talking about your idle cells? Are you using a wideband or not?
    http://www.bowtiev6.com/

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    • #3
      Re: MAF tuning....low freq hz?

      I don't seem to hit them even at idle. I am talking about cells 1500-2125 in the MAF - AFR error % histogram.

      Yes I have a wideband.

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      • #4
        Re: MAF tuning....low freq hz?

        Use the lowest cell that you do hit to adjust those the same as that cell.
        sigpic

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        • #5
          Re: MAF tuning....low freq hz?

          Originally posted by bigbrian442 View Post
          Use the lowest cell that you do hit to adjust those the same as that cell.
          I know I am supposed to use the lowest one I hit. But how exactly? Do I just enter the number of the lowest cell I hit after I paste special in the Maf Table? Or am I supposed to use the paste special somehow to adjust the number with the lowest cell from the histogram in the Scanner?

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          • #6
            Re: MAF tuning....low freq hz?

            no after you use the paste special and have your lowest number...copy that and paste it into those lower cells that you havent hit...for the other cells that you don't hit at part throttle, you can use the interpolate button between the two closest numbers to that point you missed....

            2002 SOM Z28 Camaro - 12.9 @ 104 mph
            1996 3800 Camaro - 13.43 @ 100.77 mph


            Project Cars | How To Guides | Scratch Repair | Synthetic Oil

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            • #7
              Re: MAF tuning....low freq hz?

              I haven't even messed with those parts of tunning in 9 years since I have owned HPtuners, never had a need to , only when I ran my powerdyne I justed 2 -3 cells in the lower part of the maf to make it idle better for the extra air at idle. Right now N/A it is just left stock and have no problems running 27-28 degrees of timing.
              08' L76 6.0L 4X4 Chevy EXT.Cab LTZ Vortec MAX with Snug top cover, Dynomax exhaust,Hptuners& K&N intake
              96' Camaro M5 to A4 conversion, alot of mods . GT35R Turbo full suspension. Built engine

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              • #8
                Re: MAF tuning....low freq hz?

                Ok, so just to make sure I have this right. The lowest cell I hit was 2250. After the paste special this cell is at .65. The 2125 cell reads .47, and I did not hit this one in my histogram.

                So I should set 2125 and below all to .65. Right?

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                • #9
                  Re: MAF tuning....low freq hz?

                  yes...

                  2002 SOM Z28 Camaro - 12.9 @ 104 mph
                  1996 3800 Camaro - 13.43 @ 100.77 mph


                  Project Cars | How To Guides | Scratch Repair | Synthetic Oil

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                  • #10
                    Re: MAF tuning....low freq hz?

                    haha. ok. Thanks. I am slow sometimes :twak:

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                    • #11
                      Re: MAF tuning....low freq hz?

                      Originally posted by dgreet77 View Post
                      haha. ok. Thanks. I am slow sometimes :twak:

                      its ok...took me forever to get maf calibration tuning...mine still isnt 100%...Im still working on getting it smooth...I think its cause my injectors arent dialed in 100%

                      2002 SOM Z28 Camaro - 12.9 @ 104 mph
                      1996 3800 Camaro - 13.43 @ 100.77 mph


                      Project Cars | How To Guides | Scratch Repair | Synthetic Oil

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                      • #12
                        Re: MAF tuning....low freq hz?

                        Yeah. Between work and a crap laptop battery I don't make much progress too fast....I am sure I will have more problems as I go.

                        I was kinda hoping to get my MAF tune done a bit before I get my pulley for my powerdyne because I know I will want to work on that instead...

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                        • #13
                          Re: MAF tuning....low freq hz?

                          Originally posted by LETZRIDE View Post
                          its ok...took me forever to get maf calibration tuning...mine still isnt 100%...Im still working on getting it smooth...I think its cause my injectors arent dialed in 100%
                          I'm in the same boat as you man. I couldn't get a straight answer from anyone as to what my injectors were rated at. Even the guys that sold it to me from Intense said they're rated at about 42.5. I was hoping for something a little more accurate other than "about". :rolleyes:

                          Originally posted by dgreet77 View Post
                          Yeah. Between work and a crap laptop battery I don't make much progress too fast....I am sure I will have more problems as I go.

                          I was kinda hoping to get my MAF tune done a bit before I get my pulley for my powerdyne because I know I will want to work on that instead...
                          You'd have to re-calibrate the MAF after you install a new pulley anyways right? Unless it's the same size.
                          Last edited by Blizzard242; 08-02-2009, 11:44 PM.

                          TEAM C6V6

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                          • #14
                            Re: MAF tuning....low freq hz?

                            Ok. So heres another question. Is the symptom(s) of injectors not being dialed in having a hard time achieving 14.7 while Maf tuning? Or you Fuel Trims not locking at 0 while Maf tuning or what? Because as far as I can tell, I got 42.5 Green Tops in and set them at ~44 across the board and my car seems to like it just by sotp feeling....that and as far as I know, the small amount of Maf tuning I have accomplished is going well...

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                            • #15
                              Re: MAF tuning....low freq hz?

                              Originally posted by dgreet77 View Post
                              Ok. So heres another question. Is the symptom(s) of injectors not being dialed in having a hard time achieving 14.7 while Maf tuning? Or you Fuel Trims not locking at 0 while Maf tuning or what? Because as far as I can tell, I got 42.5 Green Tops in and set them at ~44 across the board and my car seems to like it just by sotp feeling....that and as far as I know, the small amount of Maf tuning I have accomplished is going well...
                              From what I've heard, you should really have your injectors correctly tuned or you're doomed from the start. However, some people have tuned with their injectors at different MAP points.

                              In my opinion, i'd rather have my injector table set solid then tune the MAF table. I've got a straight injector table with my 42.5 lucas injectors at about 42.25 across the board. And after tuning the MAF it's still adding fuel. I'm pretty sure my wideband sensor is f'd.

                              TEAM C6V6

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