John Millican

iTrader: (1)

I want to know if the memcals are the same for a 305 and 350 from a '90-92 speed density setup.

I know the programming is differant, not worried there.

I just want to know if the basic memcal is the same between the two. I can't tell by GM part number because the have differant broadcast codes so the p/n's will be differant.

I am concerned because the EST circuits are in the memcal.

Thanks!

leirch

Yep, the memcals are basically the knock sensors also so they are different from 305 to 350.

John Millican

iTrader: (1)

A memcal is a knock sensor?

I ask because my friend has a 305 memcal (home burned prom) in his 355 engine, it does not set any codes like a wrong knock sensor.

The question is still open, are 305 and 350 memcals ('730 ECM) the same minus the program in the chip??

John Millican

iTrader: (1)

50 views and no-one?

I of course searched and found nothing. I know many people have swapped from 5.0 to 5.7, did you just do a reburn of the prom or buy a new one?

Knock sensors are differant and I imagine the EST circuitry inside the memcal would be differant as well.

Team FTS

Yes the Memcals are different

From Traxion's article:

The limp home mode chips (netres, short for network resistors) and possibly the ESC Filter ('90-'92 TPI F-Bodies, aka Knock Module) are different for the 305 and 350 and these are located in the Memcal.

John Millican

iTrader: (1)

Thanks so much. I must have read that thing a dozen times last year but didn't remember seeing it there (the answer).