"CALPAK" chips
Le Mans Master
Joined: Mar 1999
Posts: 9,637
Likes: 1,666
From: Fort Worth Texas
2024 Corvette of the Year Finalist - Unmodified
2023 C8 of the Year Winner - Unmodified
2020 Corvette of the Year Finalist (stock)
2019 C7 of Year Winner (stock)
Former Moderator
Cruise-In I-II-III Veteran
they are resistor networks. They are proprietary parts made for these memcals. I work for an electronics distributor and my product dept couldn't get a cross reference for these. They are made for GM and are not a standard part number on them. They probably only cost a few pennies, but nobody seems to be able to duplicate them at home.
Le Mans Master
Joined: Mar 1999
Posts: 9,637
Likes: 1,666
From: Fort Worth Texas
2024 Corvette of the Year Finalist - Unmodified
2023 C8 of the Year Winner - Unmodified
2020 Corvette of the Year Finalist (stock)
2019 C7 of Year Winner (stock)
Former Moderator
Cruise-In I-II-III Veteran
oh, forgot to mention what they do! The resistor networks feed the ECM with info like cylinder select (8 or 6 cylinder) and have some basic 'limp home mode' info in case the eprom doesn't work for some reason. since alot of GM ecm's are used in a variety of vehicles, the memcal chip is the only thing that makes the Corvette ECM different than a Chevette ECM! (I don't think a chevette ever used the same ecm than a vette, but you get the point!)
