Originally Posted by
TommyBlazin
p-7 firstline on-road..will the 7 port achieve better low-mid end over the 9 port eagles..etc.if not why the 7 port?
I have a P7, R7, and R9 (all of them black version). I ran them all with short header and JP 2015 pipe.
The P7 has great bottom, mid was good, top was ok but not as much as the R7 & R9 I tried a R03 crank in it and it gave me a lot more bottom, and a little more top. But it drank a lot more fuel.
The R7 has the most bottom out of the three motors. Mid was more than the P7 but only a hair more than R9. R7 didn't rev as high as the R9 on top but it was definitely higher than the P7.
The R9 has the least low end of the three (but it still holds its own with the right gearing). Not as much mid as the R7 but very close. Revs like crazy up top (most top end of the three).