ECU size question

[Ghoste]

I'm just being curious here, but why do units like the Pertronix and Firecore require so much less physical space than the Mopar ecu?

[Pete in NH]

The original Mopar ECU's were built with old style discrete electronic components on a printed circuit board. These older through hole parts where much larger than today's very small surface mount parts. Look inside your original car radio ( through hole components) and then inside your computer or any other modern electronic device ( surface mount)  and you'll see the difference immediately.

[Ghoste]

Okay, that makes perfect sense.  I had wondered if the stand alone unit offered any features the internal one did not.

[A383Wing]

Okay, that makes perfect sense.  I had wondered if the stand alone unit offered any features the internal one did not.

mainly ease of replacement in my opinion