Hi first thanks for accepting me in this forum.
I'm Italian and owner of a boat with 2 x BB 454 Gen IV (Mark IV) 1973 engines (Crusader version), Actually i'm rebuilding it and i got 2 new blocks remanufactured from USA plus all the other necessary parts (like the new distributors in this case).
I did buy 1x Pertronix D209800 and 1x Pertronix D200810 (1xSTD and 1xREV rotation ). Now the mechanic here is stopping on the Pertronix settings... they have a doubt on the spring and limiters for the maximum mechanical advance (none 12°/blu 16°/red 20°) to use for this model of engines.
We saw from documentation that the defualt is the silver spring as per attached in the installation manual (http://www.pertronix.com/support/manuals/pdf/billet.pdf ).
From orginal specs the blocks are for 4.400 rpm and are equiped with 4BBL Rochester.
Can someone help us ? Is the default silver spring the correct one to use ?
in this case wich limiter 12°, 16° or 20° should be used ?
really thanks if someone can help me. Isn't an easy task....
Kind regards.
Nick.
View attachment extract manual.pdf
I'm Italian and owner of a boat with 2 x BB 454 Gen IV (Mark IV) 1973 engines (Crusader version), Actually i'm rebuilding it and i got 2 new blocks remanufactured from USA plus all the other necessary parts (like the new distributors in this case).
I did buy 1x Pertronix D209800 and 1x Pertronix D200810 (1xSTD and 1xREV rotation ). Now the mechanic here is stopping on the Pertronix settings... they have a doubt on the spring and limiters for the maximum mechanical advance (none 12°/blu 16°/red 20°) to use for this model of engines.
We saw from documentation that the defualt is the silver spring as per attached in the installation manual (http://www.pertronix.com/support/manuals/pdf/billet.pdf ).
From orginal specs the blocks are for 4.400 rpm and are equiped with 4BBL Rochester.
Can someone help us ? Is the default silver spring the correct one to use ?
in this case wich limiter 12°, 16° or 20° should be used ?
really thanks if someone can help me. Isn't an easy task....
Kind regards.
Nick.
View attachment extract manual.pdf