with my old 5.3 (w/ls6 cam, bolt ons) i went a 10.2 @ 68-69mph then put in a precision 3000 stall in and dropped to 9.1-9.2 @ 73-74mph in the 1/8th mile. havnt run a 1/4 yet. Waiting for the trak to open to see what the new motor will do