C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Looking for ABTB bin file.

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Old Jul 11, 2002 | 11:44 PM
  #1  
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Default Looking for ABTB bin file.

If it is out there. I'm told through gmecm@diy-efi.org that .....


From: removed@forthepost.com
To: <gmecm@diy-efi.org>
Subject: Re: [Gmecm] 1987 Corvette BIN (part 2)
Date: Tue, 9 Jul 2002 22:19:10 -0700
Reply-To: gmecm@diy-efi.org

87 and 88 are the same, I have an 87 with 4+3 (Used to be, now 6 speed).
The 87-88 code has never been completely hacked, but most of the way hacked.

Mark (My original was ABTB)

Any ideas on what to do? I've got my stock ABTB chip in my hands, not too much good that does though does it?


[Modified by scorp508, 10:45 PM 7/11/2002]
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Old Jul 11, 2002 | 11:57 PM
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Also....

I found the ABTB0315 32.bin 16Kb file from the gm-ecm FTP site, but am confused now since the other person said it has never been completely hacked.

Also isn't my program ID byte $32b, why does this file end in only 32? From the tunercat website...

32 = 86 Y & F CAR 5.0L / 5.7L TPI
32B = 87 - 88 Y & F CAR 5.0L / 5.7L TPI

The BCC search engine gives me...


BCC used in 1987. (Scroll down for more info)
BCC= ABTB0315 Scan id= 7741 Part number= 16070312
Release date= 06/13/86 Engine size= 5.7 Trans Type= Manual trans
ECM/PCM: ECM #01227165

Used in cars: Chevy
Possibly used in: CORVETTE

Options:
With G44 AXLE, REAR, 3.07 RATIO
With L98 5.7L GAS 8 CYL MFI
With MK2 MAN 4 SPD DOUG NASH CO 83MM 2.88
With NA5 FEDERAL REQUIREMENTS
With NM5 EMISSION SYSTEM, NON-CLOSED LOOP (CANADA)
Without VD1 PROVISION OPTIONS, EUROPE (EXPORT)
Which is completely accurate.


[Modified by scorp508, 10:58 PM 7/11/2002]
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Old Jul 12, 2002 | 01:13 AM
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Default Re: (scorp508)

Brian,

the ABTB0315 32.bin is what you're looking for. Most guys don't bother with putting the b on 32b bins since knowing the ABTB is from '88 it's a given that it's a 32b.

actually, looking at the BCC lookup page I emailed you the other day, it shows ABTB as being a non-closed loop Canada bin..... don't know if you really want that.


With NM5 EMISSION SYSTEM, NON-CLOSED LOOP (CANADA)
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Old Jul 12, 2002 | 01:30 AM
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Default Re: (Marcho Polo)

duh, I just noticed your cut-n-paste from the BCC lookup thing.... that says it's a non-closed loop bin, but the GM parts manual doesn't say ABTB is for import.... but these other bins may also interest you:

ABTC
ABTJ
ABTH


These are all showing to be 1987 4+3 bins, Federal emissions.






hmmmm.... and looking at the diy ftp site, I don't see any of those three.

But! I just browsed my own personal folder and I have ABTC.... I'll email it to you right now. :D
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Old Jul 12, 2002 | 01:49 AM
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Craig thanks. It appears taht ABTC is the "other" overdrive unit. I have an MK2 unit that came with the Z51 cars. I was using the MH6 (or is it MH5 listed in the lower on, arghhh) unit for 5k miles before it burned up on me last week and I swapped it out for my MK2 unit again last Monday.

I wonder what the difference is in the BINs because of it.

Thanks!


[Modified by scorp508, 12:51 AM 7/12/2002]
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Old Jul 12, 2002 | 01:50 AM
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Default Re: (scorp508)

might be when O/D engages since they are different... right? Didn't you say in another post about one being .60 and the other being .68?
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Old Jul 12, 2002 | 01:51 AM
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Default Re: (Marcho Polo)

might be when O/D engages since they are different... right? Didn't you say in another post about one being .60 and the other being .68?
Right.

MK2 = 0.68
MH6 (or MH5, I forget if they are the same) = 0.60

p.s.

If so, then the differences might only be in the convertor lockup tables, I dunno.


[Modified by scorp508, 12:52 AM 7/12/2002]
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Old Jul 12, 2002 | 01:57 AM
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Default Re: (scorp508)

I've always wondered if the O/D on a 4+3 was controlled in the TCC tables... but never had a 4+3 to play with to find out.


I'm guessing that one of those tables labelled for auto tranny functions is used in the 4+3 stuff too.
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Old Jul 12, 2002 | 01:58 AM
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Let me email you a file you may be interested in seeing....
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Old Jul 12, 2002 | 12:44 PM
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Default Re: (Marcho Polo)

I've always wondered if the O/D on a 4+3 was controlled in the TCC tables

Yes, definately. The TCC line coming out of the computer connects to the OD relay now. Everywhere in the code TCC is now OD, tables and code.

One of my main goals in life right now is to stop that @#$% ECM from kicking in the OD when I turn the first corner on the way to work, but I still want to keep the automatic kick down function. I can only see a code change to accomplish all this.

My BUB hack will assemble to a proper bin so that part is done ( now THAT took some time, LOL). I've isolated a couple hundred lines of code where I think the decision is being made... Soon, real soon.

I am thinking the next step would be APYP, the manual version of ARAP, though ABTP was recommended as a good manual bin from '88 and it was written with the 4+3 still in production. It is remarkable how much BUA/BUB code is reused in later versions, including ARAP/APYP.

Later,
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