You lost your Memcal ID???

[1project2many]

There is a way to identify a memcal by the knock sensor board. Under the clear sealer is a code in purple, blue or black ink. I don't have a complete breakdown of the code but the second or second and third letters will identify the engine the ESC board was designed for. I have a partial list started by Ludis Langens and added to by myself and a man going by "pontiacjeff" on a few forums.

A is for 2.8L 60 deg V6
B is for 2.0L Turbo Sunbird
C is for 2.3L Quad 4
G is for 3.8 Buick V6
H is for 2.0L Turbo Sunbird
J is for 3.1L 60 deg V6, both NA and Turbo
K is for 3.3L Olds V6
R is for 5.7L TPI
V is for 3800 Buick V6
*or*
05 is for 3.3L V6 Olds
09 is for 3.1L V6
14 is for 4.3L V6 (Turbo)
19 is for 4.3L 90 deg V6
35 is for 3100 V6
36 is for 3.4L 60 deg DOHC V6

You guys with the later TBI trucks have a chance to check a few memcals and maybe add to the list. We'll need a few to compare to make sure there's a pattern. I have a BJYA memcal which has a 26. A post in another thread lists BJYL with a 26, along with BNKM = 34 and BDYT = 16. The more data we can get together, the better our skills when we're out at swap meets & etc.

[gregs78cam]

Got to make dinner, but later tonight I will check all the PCMs I have.

OK:
'7060 BAJW 1022293 '91 5.7L "LO5" AUTO (4L80E)
'6395 BJLL 1263305 '94 5.7L "LO5" AUTO
'7427 BJFC 1194159 '94 4.3L "LB4" MAN
'6395 BDXS 1194028 '94 4.3L "LB4" MAN
'6395 BBNT 1193137 '93 4.3L "L35" CPI AUTO
'8625 BBNT 1193014 '93 4.3L "L35" CPI AUTO
'6395 BHRJ 1193272 '94 4.3L "L35" CPI AUTO

So, if I had to guess, "194" is 4.3 TBI, and "193" is 4.3 CPI

[EagleMark]

BNKM 1345221 5.7L LO5 Auto

BPKY 2195059 4.3L CPI trans ALL

I also have one but cut chip out and didn't save and soldered in chip. 1263355

[kunsan1987]

well i lucked out a couple of years ago, i had an ECM without a memcal.i found that rockauto's online catalog has listings for memcals by vehicle application.i haven't checked this in a while.

[JeepsAndGuns]

So when looking at this number, the first number is not important, and the 2nd, 3rd, and 4th numbers are the memcal models? What about the last 3 numbers?

[1project2many]

Second and third are the identifiers. The last digits are more than likely a date code... 4159 = 159th day of 1994.
"19" is a 4.3 engine and it's very consistent. The "02," "26," and "34" codes for the 5.7 are worth noting as that engine seems to be the same across several years. Maybe GM did some fine tuning of the knock filters.

[RobertISaar]

i probably have a few 3.1 and 3.4 MEMCALs laying around, but not much else, though i know i have a 95 A-body 3100 one somewhere...

does this help at all? found it a LONG time ago, but have no real use for it.

http://imgur.com/9tFJR

[EagleMark]

Very Interesting?

[Tunedperformance]

p is for 5.0 Tpi

[Tunedperformance]

Aufr is U0 AYCH is 1L

[Six_Shooter]

BAAX ('7060 PCM, $D8) "02" for the KS circuit

I was hoping this would help narriow down an application for a MEMCAL I have, that has no BCC, but the KS circuit ID is non-readable, if it was even there at all.... FML

[RobertISaar]

post the BIN, it probably wouldn't be that difficult to figure out what it is...

[1project2many]

I got a pile of memcals from Grumpy a few years back which I still can't ID. I've figured out a few of them but the rest are just sitting in a box.

If you can see the numbers on the RFD chips you might be able to narrow things down a bit.

[EagleMark]

I got a pile of memcals from Grumpy a few years back which I still can't ID. I've figured out a few of them but the rest are just sitting in a box.
Can't you just read the prom and run it through bithoist? Then with a BCC you could match up to list being created?

[1project2many]

Bithoist is far from complete when it comes to US calibrations. And AFAIK it has no knowledge of overseas stuff. And, finally, there has to be a .bin file in the memcal to read. Heck, one of these is a complete custom made piece using a header from some type of industrial looking machinery. Neat stuff, but probably destined for a museum somewhere. :)

[Tunedperformance]

I will take any marked 16072665 16133420 :laugh:

[JeepsAndGuns]

The last digits are more than likely a date code... 4159 = 159th day of 1994.

Humm, if this is true, then the two BNKM memcals I have, one is made on the 066 day of 1996. Full number is 1346066. Other one is 2345110.

[EagleMark]

More info on V6 to V8 Memcals, this thread has a link back here to this thread for information as well.
http://delcohacking.net/forums/viewtopic.php?f=11&t=214

Link to good post on memcals
http://www.gearhead-efi.com/Fuel-Injection/showthread.php?1452-Ready-to-start-collecting-parts-for-GM-ECM-in-toyota-4runner&p=18185&viewfull=1#post18185

[EagleMark]

Dumping some Memcal, netres etc... files I've been collecting. Thanks to all that did the work for these files.

[RobertISaar]

a couple of those are quite interesting.... specifically the "FILTER BOARD RESISTANCE" and "netres pinouts info" archives.... can build your own knock filter AND netres...

[Tunedperformance]

A Australia company that makes cams crow cams makes there own netress boards you can see all surface mount resisters on there board kinda like a g1 . It's for there cam combination with the 808
http://i43.photobucket.com/albums/e390/brianlvs/image_zps6428efc4.jpg

[Tunedperformance]

Utilityguy2 did the resistance on the knock boards, Garry is a retard how can you tell squat for the resistance of capacitors.

[EagleMark]

I think the real question is why Moates doesn't build us one of these? Oh, wait they said they were?

[Tunedperformance]

That would be awesome if moates made these for popular gm ecms, copyright 2000 wow were behind the times.

[RobertISaar]

i uh..... i might be able to make that. my northstar memcal adapter is coming along nicely, i might think about it after that gets finished.

[EagleMark]

You may want to talk to Moates about both of these. I know they would be interested in your Northstar thing. But also know they were working on the netres thing awhile ago...

[1project2many]

I know a guy that makes netres boards for 2.5 liter engines. His company remans the engines for Postal vehicles and he sells them with DIS as an upgrade. The engine includes a calibration on a custom netres. He's offered to make V8 versions if someone can get an original netres for checking. The knock filter is the real trick, though.

I found some notes a while agou about actually tuning the netres for backup fuel. I'll have to see about digging those out if I ever get my free time back.

[Six_Shooter]

I have a couple custom MEMCALs, that have resistors installed that are to mimic AUJP. I bought them with the intention of doing bench testing on the LHM/RFD side of things to get a way to tune for modified engines. I just haven't got that far yet.

My electronics work bench is comming along now and plan to spend quite a bit of time at it after school is over, and learning more about the unknown side of the MEMCAL is planned.

Eventually I want to figure out what needs to be done to either build a Knock filter, ideally a tunable filter, or find someway to use some other device, like one of the aftermarket knock warning systems around.

In the firetruck I'm helping with (I'm taking care of the ECM and tuning side), we have decided to try the external knock filter, with the '7730 and see how that works out. I'd like to not sacrifice any of the V8 MEMCALs I have. I'll be modifying a V6 MEMCAL.

[1project2many]

http://www.diy-efi.org/gmecm/archive/html_gm_archive_num_12/threads.html#10693
Follow "memcals needing a good home"

--->More to be added if time allows

[Six_Shooter]

This has me intrigued:



In a P4, the MEMCAL can jumper TPS into a circuit that creates a fake MAP signal.

That would suggest a sort of quasi Alpha-N limp mode.I guess this relates a little closer to the MAF systems than I had thought, unless that was in reference to the MAF system specifically.

[RobertISaar]

well, the same ECM was used for both MAP and MAF at times, the 7727/7730 being a good and common example. since the ECM certainly didn't change between them, would need to get ahold of one of the MAF and MAP MEMCALs and compare the LHM chips to see if they changed.

[Tunedperformance]

between map and maf v8 the netress was the same part number.

http://www.thirdgen.org/techboard/dfi-ecm/301820-ecm-box.html

[RobertISaar]

and that was even with changing from the 7165 to 7730/7727...

[Tunedperformance]

All the 730 and 727 v8 use 16072665 and 16133420 I have just noticed this on some 89 165 v8's. The other 86-89 165 v8 ones are numbered 16055375 and the 16055376.

http://www.exatorq.com/ludis_obd1/calxref.html

[1project2many]

Additional links:
http://www.diy-efi.org/gmecm/archive/html_gm_archive_num_15/threads.html#00354
Read "more on netres"

Still looking for the post / info this is a followup to. Threads used to drift a bit over there...

Another attachment from an old ecm info page.

[1project2many]

memcal from 87 ZR1 / LT5:
4365

[RobertISaar]

87? so a GM prototype?

[1project2many]

Yes. It was supposed to be destroyed but instead got used as a racecar for a few years then ended up being restored by a Vette guy.

Actually, while searching for a proper link, I found it's an 88 MY produced in early 87 and the ZR1 RPO hadn't been assigned to the car at the time.
http://thepandatrap.com/gallery/ZR-1s

The car the memcal is from is the blue one near the bottom of the page.