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Rotor phasing

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BBFTorino
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Post  2 wicked January 29th 2023, 9:07 pm

Hey all, got a little dilemma. Working an a friend's motor. 604 ci bbf. Total locked timing 34 degrees. Pulling 15 on start up. Still wants to kick back quite a bit. Would getting an adjustable rotor help this situation and setting the phasing? Thanks cory

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Post  BBFTorino February 6th 2023, 4:30 pm

What's the compression? My 557 at 14.2:1 was doing this. No matter what I did, it would crash the starter very violently, it was tearing up the teeth on the starter and the ring gear.
I finally had to "unlock" the distributor and put a weight/spring/bushing kit in it give it a curve so it has a chance to actually crank while trying to start!

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Post  Dave De February 6th 2023, 7:13 pm

Establish cranking before ignition should solve this problem.
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Post  Kobelco February 7th 2023, 11:03 am

I did this on a MSD setup many years ago, works:

MSD Ignition Starter Saver Ignition Retard Box with Signal Stabilizer
Part Number: 8984

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Post  rmcomprandy February 7th 2023, 11:36 am

Getting the "rotor phasing" correct is a big deal with a performance engine ... especially one with higher cylinder pressure.

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Post  Curt February 7th 2023, 5:50 pm

Do you have a cap with a hole in it? You could be arching across two posts. I have found that sometimes less is better.
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Post  2 wicked February 7th 2023, 8:35 pm

The comp is right at 15, don't have a cap with a hole at #1. Was going to order a couple extras and drill one to check phasing. Do have a adjustable rotor on the shelf. Going to try phasing it when the caps arrive. Thanks to all of you for the info. Cory

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