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John at J&S John at J&S is offline
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Join Date: Dec 2005
Posts: 147

I found the amount of boost retard required varies with the amount of time you have been on the gas. Probably related to the temperature of the combustion chamber.

I turbocharged my Fiat sedan in 1980, and out of necessity, designed my own boost retard ignition. Marketed it as the TRAC II, before MSD had one. My day job I was a technician at Hughes Aircraft.

My turbo "system" was pretty crude, blow through the carb, no intercooler. The closer I got to work, the more boost retard I had to dial in keep it from knocking.

I started experimenting with knock sensors in 1982. Hughes "gave me the opportunity" to start my own business in '89. Individual cylinder knock control was released in '91.
Old 04-28-2008, 06:19 PM
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