OK, here are the figures. 1957 T'bird, 341 y block making just over 400, weight is 3400 with driver, 456 mini spool, 28" tall slick, running a C4 and an 8" convertor. The 15 year old convertor was swapped out for a new one and the big "promised" .25 sec and 3 mph did not appear. The car runs right at 12.90 and 102 mph. The 60 foot is the same, launch feels OK, it was in similar track conditions to what we have run in the past. Guess my question is...did we have our hopes too high...was the sales guy a smooth talker...has nothing changed in convertors in 15 years???
First ( and sorry ) but its making 270 hp , not 400 , at 102 and 12.90 its about right , more HP ( in the 400range )would show as say 110-111, but there are many factors involved in reducing ET , 60fts , RPM's at the traps , Fuel Pressure TEMP , Humidity , Baro pressure , many tracks can vary 50 hp from good air to bad , I would want to see before and after time slips and the conditions when both were run