Quote Originally Posted by joegreen View Post
The memcal or calpack or netres whatever you want to call it is like a super basic backup chip that can run the engine if the main chip fails. Its the chip that operates the engine when its in limp home mode. I think the chip is just a bunch of resistors or something. Anyway there are a few different varieties that will run 6 cyl or 8 cyl motors ect. You will need a calpack from an 8 cyl vehicle if you want to run an 8 cyl engine.
Okay, that explains it. I was going to ask if the limp home mode was the same as open loop settings, and after your explanation and some more research I think I understand, thanks! My 1227747 was from a 1991 5.7L truck, I should be okay to use it with the 239ci flathead.

Cheers