is it true that engines with fewer ports generally have better bottom end than engines with more ports?
i have also found that engines with good bottom end, like a torquey big block like my Picco .27, does not need to be paired with a bottom end pipe. i made the unfortunate decision to pair my .27 with a JP-1 (i have a small track with no long straights, so you can understand my logic). sometimes i couldn't keep it from doing wheelies, so i recently bought a JP-2 to help smooth out the power delivery. this is with my truggy.
however, i have an RB S5 (5 ports) in my buggy paired with a JP-1 (also because i run on a short track). i may consider a JP-2 or JP-3 because i also have a good bottom end clutch setting. i'm not saying that my X1 does wheelies, i simply would like some better mid to top end power.