Memcal for 1989-1990 3.1L turbo (LG5)

[sanderson231]

Anyone know where I can find a memcal for this engine? gmeprom does not have one. The ECM is a 7727. The broadcast codes are: ASAN, ASMF, ATMJ, ATMK, AUAD, AUAF or AZRC. Trying to stay with an original memcal for the knock sensing circuitry.

[sanderson231]

Found one on ebay - $101 (ouch!) but couldn't find an other option

[1project2many]

That's a lucky find.

The knock sensor circuitry is the same between NA and turbo 3.1 engines. The programming for the analog fuel delivery may be different due to the MAP sensor and injector differences. There is a code on the memcal which appears to indicate what engine the analog circuitry was designed for. This thread has a little more information:
http://www.gearhead-efi.com/Fuel-Inj...your-Memcal-ID

[sanderson231]

Good to know that the N/A engines used the same knock sensing. I wasn't sure that knock retard was used on the N/A engines.

The project is an electrically supercharged GM 2.8L V-6 (1986 Pontiac Fiero). I'll start with the 3.1L turbo EPROM and tune from there.

[Six_Shooter]

$100 for an impossible to find MEMCAL is pretty cheap.

Just for reference, certain V8 MEMCALS, that were produced in much higher numbers than the LG5 MEMCALs can fetch 2 to 3 times as much.

Did you need the LHM/CAL side as well? Otherwise you can use an NA MEMCAL and just use the bin files you can find here: http://www.gearhead-efi.com/Fuel-Inj...Information-8F

[sanderson231]

I already downloaded a bin from here. I plan to use a EEPROM with a Moates adapter in the MEMCAL I just bought.