We take the '66 Bel Air Bracket Racer out to the track to do some testing and tuning. Plus, some tips on how to get better elapsed time slips when it's your turn on the drag strip!
My 1965 Bel Air GMPP 454 HO with cam, intake and other upgrades, dynoed at 558. Full manual TCI th400 super street fighter 10" converter, 3.73's Flowmaster super 44's 100% stock suspension without any upgrades on regular 275/60 radial T/A's went consistent low 12.90's. Once it pop through the carb and it acted like traction control and went a 12.60!
A 4000+ pound barge and a 3.50 gear doesn't help with acceleration. Toss a 4.11 gear in it and it will definitely perk up. Also the 502 was 502hp at the flywheel. Front drive and drive line parasitic losses are probably 20-30% so 350-400 to the tire is an probably a close horsepower number. Which translates to mid to high 12s in the quarter.