1987 3/4 ton suburban 454 TBI
7747 ecm
Do yall think I can tune any power or mpg out of the factory tune on this vehicle.if so would I start with timing table.
1987 3/4 ton suburban 454 TBI
7747 ecm
Do yall think I can tune any power or mpg out of the factory tune on this vehicle.if so would I start with timing table.
Last edited by mdj; 04-19-2014 at 01:20 AM.
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