Ignition module trick
#1
Thread Starter
Registered
Joined: Sep 2020
Posts: 216
Likes: 15
From: Kentucky
Has anyone ever heard of using a 4.3l merc ignition module on a gen 4 454 in place of its own v8 ignition module I was told it was an upgrade can anyone confirm or deny this
#2
Registered

Joined: Nov 2004
Posts: 14,108
Likes: 3,694
From: On A Dirt Floor
Yes. A ton of people here over the years. Since it has very little advance when used on a v8, mostly people with roots supercharges and those with very large cams naturally aspirated use them as it lets you put in a lot if initial advance.
Last edited by SB; 03-04-2021 at 09:13 PM.
#3
Registered

Joined: Nov 2004
Posts: 14,108
Likes: 3,694
From: On A Dirt Floor
Here is a good post from Griff on it and others. Includes the advance curve charts.
mercruiser ignition module question
mercruiser ignition module question



