A9L2 Base Calibration

Vehicle specific forum for tuning the Foxbody Chassis Mustangs utilizing the LUX0, GUFA, GUFB, and GUF1 Strategy

A9L2 Base Calibration

Unread postby decipha » Sun Feb 23, 2014 4:44 pm

Wow! Just realized i never made an a9l2 sticky!!!


The A9L calibration as well as all the stock foxbody calibrations are not optimal by any means. Henry's engineer's working on the foxbody calibrations obviously did not fully understand the functioning of the ECU's, this is evident by the 'band-aiding' they did to the fuel table and WOT multiplier to get fuel where they wanted it. The stock calibrations require extensive changes in order to sucessfully calibrate a vehicle even in bone stock form. The A9L2 base calibration, is a theoretical stock calibration for the foxbody ecu's created by decipha. This base calibration is adjusted for highly modified naturally aspirated and boosted engines including: turbocharged, supercharged, and nitrous, as well as bone stock factory engines. This base calibration can be used on ALL 1989-1993 foxbody mustang ECU's. However, for Tweecer users you cannot change strategies. If you have a tweecer and wish to use this calibration verify your ecu is a GUFB strategy ecu.

A9L2 write up is on the homepage

http://info.efidynotuning.com/a9l2.htm
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Re: A9L2 Base Calibration

Unread postby decipha » Tue Apr 08, 2014 10:18 pm

updated and posted the A9L2 base cal, now idle air correction isn't saved, this prevents many idle issues from ever being possible with cold enrichment, this is identical to the 'mechanical' idle control but still allows the ecu to stabilize idle, best of both worlds
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Re: A9L2 Base Calibration

Unread postby g3mustang » Mon Apr 14, 2014 8:43 am

so do you still have to dial in idle air?
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Re: A9L2 Base Calibration

Unread postby decipha » Mon Apr 14, 2014 9:24 am

not really, just need to adjust the throttle body set screw correctly to get IPSIBR below 0.05 at a warm stabilized idle and your done
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Re: A9L2 Base Calibration

Unread postby g3mustang » Thu Apr 17, 2014 9:41 am

why has Z_afr changed from gasoline to e10?
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Re: A9L2 Base Calibration

Unread postby old_skool_fox » Fri Apr 18, 2014 6:36 am

decipha wrote:updated and posted the A9L2 base cal, now idle air correction isn't saved, this prevents many idle issues from ever being possible with cold enrichment, this is identical to the 'mechanical' idle control but still allows the ecu to stabilize idle, best of both worlds


Just to clarify, all of the red text in Idle Air 101 can be ignored because of this, right?
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Re: A9L2 Base Calibration

Unread postby decipha » Fri Apr 18, 2014 10:44 am

i went with e10 because gasoline doesn't exist in most parts of the country

no, the red text in the idle air 101 used to not apply with the first revision of the mechanical idle control but thats not the case with the new final mechanical idle control

basically you still do it all the same except you don't have to worry about negative trims causing idle issues from cold to warm, i'll update that write up when my new screen comes back in
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Re: A9L2 Base Calibration

Unread postby rvh345 » Thu Apr 24, 2014 3:53 pm

Michael - just wanted to see if these updates were made to your idle air 101 write-up. Trying to ramp up on this area and it is making sense, but curious about how it would change. Thanks for the time to keep us newbies in the learning process.
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Re: A9L2 Base Calibration

Unread postby decipha » Thu Apr 24, 2014 8:43 pm

yep updated
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Re: A9L2 Base Calibration

Unread postby mustanghl » Mon Jun 09, 2014 1:47 am

where do i find Z_afr setting ?
Thank you
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Re: A9L2 Base Calibration

Unread postby decipha » Mon Jun 09, 2014 9:08 am

I see now your using tunerpro, dont think dex added it to that def

maybe one day when i finally get around to it ill add it in
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Re: A9L2 Base Calibration

Unread postby mustanghl » Mon Jun 09, 2014 1:43 pm

Hi,
so i can not use A9L2 ?
because i don`t use e 10 gasoline !?
Thank you
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Re: A9L2 Base Calibration

Unread postby decipha » Mon Jun 09, 2014 1:51 pm

you can use it no prob

just tune it as u would otherwise
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Re: A9L2 Base Calibration

Unread postby David » Sun Jun 15, 2014 2:24 pm

Just ordered a Moates QH and I'm planning to load the A9L2 tune. Right now I have 0 driveability issues or issues otherwise ( other than annoying loud ass dronemasters ).
Looking forward to seeing how this affects the vehicle !
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Re: A9L2 Base Calibration

Unread postby decipha » Wed Jun 18, 2014 11:13 pm

cool, be sure to post back i'd like to know and im sure others would as well, transition should be smooth
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Re: A9L2 Base Calibration

Unread postby David » Wed Jun 25, 2014 10:08 pm

I got the A9L2 tune loaded. I made zero changes to it, just ran it, and well unfortunately it doesn't run so great. Idle is all over the place, and part throttle is whacky too.. didn't even go near WOT before I brought it back in.
The car is basically a 'stock' fox, just the explorer heads/intake, still has 19lb injectors, and has a C&L 73mm, but with the 19lb 'calibrated' flow tube. Runs fine with the stock tune... not really sure where to start here. After reading all through the 101s several times, I can't really see what else should be done other than setting the idle.
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Re: A9L2 Base Calibration

Unread postby decipha » Thu Jun 26, 2014 7:21 am

you got me curious now

can u start your own garage thread and post a datalog

Explain in that thread what it was doing at idle and part throttle
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Re: A9L2 Base Calibration

Unread postby sly5paul1 » Wed Aug 20, 2014 6:50 am

I was comparing the old A9L2 cal with the updated one and the only change concerning the type of gas being used is the e10 being selected in the Z_AFR slot. I thought there were other changes that needed to be made to use e10.

Would you list the parameters that need to be modified when going to e10 from gasoline? Also I want to go to the new A9L2 and interested to know what will it take to make the switch? Will I have to manually go in and update every field to the tuning that I have already done or do I start tuning all over again?

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Re: A9L2 Base Calibration

Unread postby decipha » Wed Aug 20, 2014 4:07 pm

only the z_afr scalar needs to be updated when going from gas to e10, NO OTHER CHANGES ARE REQUIRED

just copy over the info in the instructions from your existing tune and youll be good to go
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Re: A9L2 Base Calibration

Unread postby sly5paul1 » Wed Aug 20, 2014 9:32 pm

Thanks a lot!

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Re: A9L2 Base Calibration

Unread postby xr4x4ti » Mon Mar 30, 2015 11:49 am

Hey Decipha,

First, thanks for all of the very valuable information you have on this site.

Is it possible for you to list all of the "hacks" that are built into the A9L2 base tune? For example the ACT/ECT timing retard, etc.

Also, you have referenced in several posts that maybe there are changes to some tables and scalers that are not acceptable with the existing open GUFB def file. Is it possible to elaborate more on this?

Thanks in advance,
Tim
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Re: A9L2 Base Calibration

Unread postby decipha » Mon Mar 30, 2015 11:56 am

all the hacks are listed in the A9L2 write up, most notably the ECT spark retard function and the ACT spark retard table
just bear in mind that with the A9L2 they are swapped, so in the GUFB definition file it will say ACT spark retard function and ECT spark retard table which is inaccurate for the A9L2, this gives you SIGNIFICANTLY better spark control, these parameters don't usually require messing around with

http://info.efidynotuning.com/a9l2.htm

All the other "background" hacks made by sailorbob or myself I've managed to make all play nicely with any tuning software you use, if you have any questions about anything your unsure of don't hesitate to post back
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Re: A9L2 Base Calibration

Unread postby xr4x4ti » Mon Mar 30, 2015 2:21 pm

Thanks once again for your quick response.

The reason I asked the question, is that last fall I tried an experiment after I swapped to a blow through slot MAF. What I did was take my existing tune and do a "compare" with the A9L2 tune in BE and changed everything in the A9L2 tune that was vehicle specific, like MAF transfer, injector size, idle air, etc. This didn't work at all and the car would barely run. I then took my 2 year old tune and put in the new MAF curve and it fired up and I drove it around. I thought I was pretty good at this stuff and I went through every variable that was different between the two tunes and I couldn't remotely find one that should cause it to go from running great to almost not running. I had already done most of you suggestions to the old tune so there really wasn't that much different and that is what didn't make any sense.

Thoughts?
Tim
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Re: A9L2 Base Calibration

Unread postby decipha » Mon Mar 30, 2015 2:30 pm

thats due to the fact that the A9L2 tune has code changed in the background that you don't have access to

anyone that has ever tried to imitate a decipha tune usually fails miserably at it, such as you experienced first hand

you should have downloaded the a9l2 and just copied the info in the write up from your original tune to it and you would have been good to go
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Re: A9L2 Base Calibration

Unread postby olddog » Sun May 31, 2015 8:44 pm

I down loaded the A9L2 last fall and I'm just now getting all my mechanical changes done to the car. So now I am back to looking over the A9L2 and reading some of your write ups. In the timing write up for GUFB it states "NEVER allow the ACT spark function to add timing only retard timing." So I checked the ECT table. The Values showing are positive numbers. 90=1, 96=2, 130=3, 190=4, etc. The ACT table which is actually ECT does have negative numbers in it. So I am a bit confused with the ECT table (A9L2 is actually for the ACT). As my air charge temp increases is this table going to add or subtract timing with positive numbers in it?

Also are the numbers in the table realistic for temp reading in the MAF meter (in the pipe)?
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Re: A9L2 Base Calibration

Unread postby decipha » Sun May 31, 2015 9:55 pm

theres only one table and in the A9L2 tune its ACT

if ACT is in the inlet pipe just copy the 190 column to 130 and all is well
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Re: A9L2 Base Calibration

Unread postby olddog » Mon Jun 01, 2015 7:37 pm

Bear with me I'm new at this. I think I miss-used the term "table" when I should have used "Function."

In the A9L2 these two functions have been switched.
PT Spark Adder for ACT FN126
PT Spark Scaler for ECT FN1133

PT Spark Adder for ACT FN126:
|-256 | 0 |
|-256 | 0 |
| 224 | 0 |
| 234 | -4 |
| 254 | -8 |

PT Spark Scaler for ECT FN1133:
|-65536 | 0 |
| 86 __ | 0 |
| 90 __ | 1 |
| 96 __ | 2 |
| 130 _ | 3 |
| 190 _ | 4 |
| 210 _ | 5 |
| 254 _ | 6 |
| 65534 | 6 |

So FN1133 has positive numbers in it. Is this going to reduce timing as the air temp increases?
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Re: A9L2 Base Calibration

Unread postby decipha » Mon Jun 01, 2015 7:44 pm

thats not FN1133, that's just the scaling function for FN1133, FN1133 is a table

go check out the table FN1133 and it will all make sense
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Re: A9L2 Base Calibration

Unread postby olddog » Mon Jun 01, 2015 9:32 pm

Yes that makes much more sense now. Still a little confused on the move the 190 column to the 130, as in FN1133 table both columns are full of zeros. At first I thought you intended in FN1133 to copy paste each column one spot to the left, but re-reading I'm not sure. Are you meaning I should be changing the scaling function or changing the FN1133 table?

While I'm asking questions. Does the A9L2 pull timing out based on both engine temp and air temp, or just air temp? FN126 Pt spark Adder for ACT - is this being used to pull timing based on ECT or not? I thought it did, but a few things confused me.
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Re: A9L2 Base Calibration

Unread postby decipha » Mon Jun 01, 2015 10:32 pm

yes fn126 pulls timing when ECT exceeds 224 degrees

Fn1133 pulls timing for ACTs, copy the 210 and 254 values over to 130 and 190, so the ecu will begin pulling timing when ACTs exceed 96 degrees
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Re: A9L2 Base Calibration

Unread postby olddog » Tue Jun 02, 2015 7:29 pm

Done. Thanks a lot for getting me straightened out.

I left the 254 column the same as the 210. I doubt the air could get to 210 anyway. I'm pretty sure that was what you intended.
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Re: A9L2 Base Calibration

Unread postby olddog » Sat Jun 06, 2015 9:37 am

In the A9L2 write up, it stated "FN875N must be set to all 0.6"
The table now has:
row ; des rpm; lb/min
1 ; 0 ; 0
2 ; 0 ; 0
3 ; 0 ; 0
4 ; 0 ; 0
5; 800 ; 1.148
6; 4080; 1.992

I see the need to change row 4 and 5 (I assume row 2 and 3 wouldn't matter either way). I'm hesitate to change row 1 or 6 as often it is warned not to change the bottom or top rows (or are these warning only for the scaling). Do I change all rows?

Also I was reading the mechanical idle section of the idle air write up. It list all the things to change to do this on your own. I noticed not all of these are set in the A9L2 as listed in the write up. I assume that is because the A9L2 handles some of this differently than an A9L or other factory GUFB tune. I just wanted to verify that with you.

Sorry to be such a pain, but I am very green at this. I am trying to learn and understand what I am doing, not just get by. I expect understanding more is going to come in handy real soon. Again thank you very much for everything you do for all of us.
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Re: A9L2 Base Calibration

Unread postby decipha » Sat Jun 06, 2015 11:00 am

your not a pain at all, the more questions the better thats how we learn a lil clarification never hurt anyone and after all thats what this forum is here for

I just updated A9L2 you can go ahead and redownload it and it will all be taken care of, you can see what i meant by the .6 you'll see now its all .6s

the idle air write up will give you all the specifics as to how it functions what not, if theres a part in there that isn't 100% clear just let me know and i'll clarify
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Re: A9L2 Base Calibration

Unread postby olddog » Thu Jun 11, 2015 5:14 am

I was going through the New A9L2 finding the stuff associated with the idle and making those changes to the Old A9L2 (from Sep 2014) that I have already modified for my engine. I noticed that there is more changes than just the idle air. I tried using the compare tool, but it flags every memory location. Not sure why.

Should I continue to use the older file or should I take a copy of the newer and start over putting in my modifications?
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Re: A9L2 Base Calibration

Unread postby decipha » Thu Jun 11, 2015 10:36 am

start with the new, always use the latest and greatest

I have some of my own special hacks in the latest a9l2 so you want to use it

Just copy over the steps from your old tune to the a9l2 and youd be good to go
Be mindful of the sealevel spark scaling, the table axis changed, dont just copy and paste it
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Re: A9L2 Base Calibration

Unread postby olddog » Thu Jun 11, 2015 7:24 pm

Done. Now to get all the parts back on it and start tuning.

A couple trips to the hospital for kidney stones (boulders) has de-railed my efforts.
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Re: A9L2 Base Calibration

Unread postby GT_Rich » Sun Dec 06, 2015 8:21 am

Decipha,

In the A9L2 tune, why do you have the Adaptive Control ACT Minimum (AFACT1) set to 258F. Did you purposely do this to keep the adaptive fuel table from updating? If so, what's the benefit?

Thanks,
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Re: A9L2 Base Calibration

Unread postby decipha » Sun Dec 06, 2015 12:25 pm

its not, its set to -254 to null the clip, the memory location is a signed byte so it is impossible to have a value of 258, your definition file is showing the value incorrectly

welcome to the forum
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Re: A9L2 Base Calibration

Unread postby decipha » Sat Jan 09, 2016 7:50 pm

Ive always been aggitated with the small size of FN020C the ECT scaling for the isc multiplier table

given that one must have a multiplier of 0 for overheat protection the measly 5 row function becomes reduced to 2 useable rows, unacceptable if someone runs a colder than 195 thermo

In any case, I reduced FN800 the isc multiplier by 2 rows and increased FN020C by 4 rows to 9 rows now

this means absolutely nothing from a user standpoint other than your def file will incorrectly display the functions

I'll be incorporating it into the base A9L2 within the next few days
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Re: A9L2 Base Calibration

Unread postby 85GT » Wed Feb 24, 2016 10:07 pm

decipha wrote:its not, its set to -254 to null the clip, the memory location is a signed byte so it is impossible to have a value of 258, your definition file is showing the value incorrectly

welcome to the forum

Hey, i see this too. Been using the Crey8's Rev 94 def forever and that's how it shows it, 258. It also comes up with
Z_WSPKSW Spark - WOT Mode Spark Control Enable/Disable is enabled. Think the that slightly older def is doing that?

Yet an older version of your A9L2 shows 20 degrees and control disabled.
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