early 427 Chevy mercruiser base timing

Farnswj

Recruit
Joined
Oct 25, 2020
Messages
5
I need to know the exact base timing for these rebuilt 11:0 Chevy Mercruiser engines in my 74' Concord boat. Currently they are set at 10° btdc. I removed the Thunderbolt ignitions, and replaced them with DUI mechanical advance marine distributors. Thanks
 

Scott Danforth

Grumpy Vintage Moderator still playing with boats
Staff member
Joined
Jul 23, 2011
Messages
51,014
Would have been 6BTDC with 24 degrees advance

What is your advance on the DUIs?
 

Bondo

Moderator
Staff member
Joined
Apr 17, 2002
Messages
71,264
Ayuh,..... Welcome Aboard,..... 11:1,..?? You really like flirtin' with disaster,.....
 

flashback

Rear Admiral
Joined
Jun 28, 2002
Messages
4,026
Ayuh,..... Welcome Aboard,..... 11:1,..?? You really like flirtin' with disaster,.....
Ii had a couple of those back in the day.. LOL it was disastrous.. on a serious note 11.1 is pushing the game.
 
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