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Old 01-05-2020, 07:34 PM   #14
BUBBAS IGNITION
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Join Date: May 2010
Location: SPEEDWAY INDIANA
Posts: 4,148
Default Re: Flathead "spark knock" ???????

Quote:
Originally Posted by Brian View Post
Jim, Have you compared the advance rates yet?
Yes got both units tested on the machine. The crab (stock) was perfect with 22 degrees engine at 2500 rpm. Thats a good stock 11A unit.

The mallory ran well but only had 16 degrees at 2500 rpm. The mallory has a internal adjustable stop.

The customer wants the crab to be set up like the Mallory. Will look into it some more tomorrow and hopefully limit the crab 11A to be a 8 degree distributor
( maybe braze up the ring slots a bit )
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