Guy's I am a new member to moparts and have been reading alot of very usefull info.I have a tube chassis 1991 dodge daytona with a 499 ci engine.The car started out with a 1971 440 engine with a solid lift 540/560 lift 284/294 cam.I had 850 carb headers ,mopar intake flat top pistons and a 9-1/2 convertor.This is a 2500 lb car with me in it the dana has 4.56 gears with 14 x 32 tires.I had my stock 346 heads re worked and had the machinist install a set of used k800 valve springs.I really thought i should have run mid to upper 6 sec range.I was very disapointed the first pass was 7.31 sec 8th mile at 91 mph i think.It ran 7.31 4 or 5 passes very consistant I went and changed to some elses cam (smaller). I returned to the track and it ran 7.15@ 97 mph passes .I then was told that I just didn't have enough compression.I decided to build a stroker motor a 499 ci .I built this motor and used the same heads ,trans,and convertor.I was told to run a 580/600 lift and 268/278 duration cam.The next trip to the track the car went a 7.03@99mph.I then had a mopar friend watch the car and he suggested getting a better convertor .I had a 8" built and went back to the track the car went a 6.86 @ 100mphafter advancing the timing a few passes later the car run 6.71 @ 102.5 mph.The car is better but shouldn't it be faster.I hate the post is so long but just looking for some good advice please help.
Mark