The top one is poor, the bottom one is good! If the bottom one could pick up a little more torque below 3,500rpm it would be great.
Hammer Performance show several dyno curves using their 1250 kit with 2-into-1 pipes, each of which give good torque curves.
I know.....it's a hammer engine....hammer disagrees with your thoughts on these two dyno sheets.. of course it's pig rich hence it looses tq at mid rpm
I know.....it's a hammer engine....hammer disagrees with your thoughts on these two dyno sheets.. of course it's pig rich hence it looses tq at mid rpm
If it really is 'pig rich', sounds like it isn't properly tuned?! Post another graph after that has been corrected, so we can see it at it's best.