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SUB2 stock bin - '95 4.9L E4OD
Posted: 2023 Feb 25, 15:16
by Sevensecondsuv
We were talking about pulling the stock bin off my truck in another thread. I figured I should start a new one. Here it is. Obviously this isn't broken out at this point. Somebody smarter than me will have to do that lol.
The truck this came out of is a 1995 F-150 with the 4.9L I-6, E4OD transmission, 4wd, federal emissions, speed density / batch fire and has the later computer-controlled dwell type of TFI module. The box code is SUB2 / SD-47A.
Re: SUB2 stock bin - '95 4.9L E4OD
Posted: 2023 Mar 08, 19:08
by efloth
I have started a list of changed parameters between stock A1C and Michael's tune so we can get a list of parameters that need to be broken out in SUB2
Re: SUB2 stock bin - '95 4.9L E4OD
Posted: 2023 Mar 08, 20:03
by efloth
I will update this as I can. Bytes and words for now:
Code: Select all
A1C Address Parameter Name
2e68 Ignition Degrees Per PIP - DEGPIP (Unactual)
43ca Code Patch
43e6 Code Patch
444b Code patch
4464 ?
A02C Code Patch
a40a DELHYST - ISCMOD_TPREL Hyst (DELRAT)
a40c ISCMOD_MAX - Idle Modulation Max
a40e ISCMOD_MIN - Idle Modulation Min
a410 KDNDT - Idle Mod Gain
a412 TC_OVER - IPSIBR Delay Idle Over
a416 ISCMOD_RPM - Idle Fuel Modulator RPM
a418 PSIBRM - IPSIBR Correction Max
a41c PSIBRN - IPSIBR Correction Min
a41e ITHBMA - Throttle Body Airmass
a420 DEBYCP - IAC Min Calc Flow Limit
a422 DASCTL - Daspot Max to allow Idle Control
a424 DASPTK - Dashpot Gain
a426 DELHYS - Dashpot TP
a428 RPMCTL - Idle ISC RPM Control (FBS Startup) (ISCFLG)
a434 UPDATM - ISCKAM Correction Rate
a435 MINMPH - Idle Control Max MPH
a440 ~IS_NUBASE - NEUTRAL IDLE RPM (NUBASE)
a442 ~IS_DRBASE - DRIVE IDLE RPM (DRBASE)
a446 BZZRPM - Startup RPM Adder
a454 TKDTN - Kick Down Time (FN826B) (TKDTM)
a455 BZZTM - Startup RPM Adder Time
a458 Failure Default RPM (NUBASE)
a81c IPSIDLY - IPSIBR Update Crank Delay
a820 SETLNG_TM - Idle Disturbance Delay (Dashpot Settling Time)
a822 AHISL - Injector High Slope (K-Constant)
a826 OPCLT3 - CL Delay Hot
a831 OPCLT4 - CL Delay Cold 2
a832 OPCLT5 - CL Delay Warm 2
a854 ?
a856 Lambse Base in OL ?
a858 MINPW - Injector Min PW Clip
a85a PIPOUT - Number of Pips Between Injector Outputs
a85c INJOUT - Injectors Per Output Port
a868 NLMT - Rev Limiter
a86a Rev Limiter Hyst
a86c VSLIM - Vehicle Speed Limiter
a86d MPH for Fuel Cut OFF Hyst
a87a WOTRPL - WOT Lambse Time Modifier RPM Min
a890 DFSECT - DFSO ECT Min
a89e Idle Spark Min Something (maybe tq)
a8a2 ~SPK_FBS_MIN - Idle Spark Min Clip (1 of 2)
a8a4 Idle Spark Max Something
a8a6 Idle Spark Min Something
a8b0 SPKCTL - SPK_FBS DSDRPM Adder Max Clip (Idle Spark)
a8b4 SPKINU - SPK_FBS Neutral Target Idle SpkAdv
a8b8 ?
ac3e CTHIGH - Hot Start ECT Min (OPCLT3)
ac3f CTLOW - ECT Threshold Cold (2 of 2) (OPCLT)
ac40 ?
ac41 ENGCYL - # Pips Per Rev (NUMCYL)
ac46 ~MHPFD - Signature PIP Difference Value
ac52 BASEMD - Engine Volume Liters (SARCHG) (cubic inches) (Idle Stability)
ac58 DELTA - PT Threshold
ac5e THBP2 - WOT Threshold
ac76 ISCDTY Default
Re: SUB2 stock bin - '95 4.9L E4OD
Posted: 2023 Mar 08, 20:28
by Sevensecondsuv
Wow thanks!
To be fair, Michael didn't make a lot of those changes, I did. Mostly trying to see what parameters would produce a noticeable change in idle performance. I.e. the trial and error method of tuning.
I would think the bare minimum to get started tuning SUB2 would be access to the VE table, injector slope and offset, and the spark table. Beyond that it'd probably be helpful to have trans type (since SUB2 is for E4OD and I'm running a stick), FN800, FN875, ITHBMA, Dashpot stuff, NUBASE, and the open loop fuel table.
Re: SUB2 stock bin - '95 4.9L E4OD
Posted: 2023 Mar 08, 21:11
by wwhite
I should post my SD48 that is nearly 100% broken out. Just needs ADX.
I think it is LADx that is the newest version of code, 1996. That would be best.
But A1c works on sd20, etc, happens to work on SD4x, with bugs.
Re: SUB2 stock bin - '95 4.9L E4OD
Posted: 2023 Mar 08, 23:12
by efloth
Cool. Do you know what type of TFI module it is set up for?
Re: SUB2 stock bin - '95 4.9L E4OD
Posted: 2023 Mar 09, 02:09
by wwhite
SUB2_cmt.txt
Code: Select all
3400 # 0 = Thick Film Ignition (TFI)
41f3 # Indicator of ignition type
41fa # 2 = Low Data Rate Distributorless dual plug (LDR_DIS)
a36f # 1 = Thick Film Ignition - Improved Computer Control Dwell (TFI_ICCD)
SUB2_dir.txt
From what I can tell, it is TFI_ICCD.
Re: SUB2 stock bin - '95 4.9L E4OD
Posted: 2023 Mar 09, 02:15
by wwhite
efloth wrote: ↑2023 Mar 08, 23:12
Cool. Do you know what type of TFI module it is set up for?
SUB2, KID2, LAD1 all set byte 1 (TFI_ICCD)
A1C and J1X set byte 0 (TFI)
Re: SUB2 stock bin - '95 4.9L E4OD
Posted: 2023 Mar 09, 11:36
by efloth
So do you guys want to focus on Sub2 then or adapting LADx? We could add the extended VE patch/datalogging to either one. SUB2 would take longer. Either way we should get a copy of your A1C tune that was only editied by Michael
Re: SUB2 stock bin - '95 4.9L E4OD
Posted: 2023 Mar 09, 12:25
by Sevensecondsuv
I can try to post the latest Michael tune later. I will note that it ran worse than the later one I posted. Mine at least has the VE table very close.
As to which strat to start with, I'm assuming LAD1 is off a V8 strat? While either one should be fully compatible with the SUB2 hardware SD-47A, I'm thinking there's going to be a LOT less tuning required if we start with SUB2. There's obviously a lot of differences in the tune between 6 cyl and 8 cyl.
All that said, I've never tried to break one of these out, so I don't have a good feel for how much work we're talking about. It's not lost on me that strangers are volunteering their own precious time to help me with this. For that reason, I'll be extremely grateful for whatever help/time you are willing to put in.