i engineered the "dip" in ! of COURSE when you take a midrange motor and port/cam it you're going to eliminate all the work Honda did to fatten the mid. also, it's a torque dip but h.p. increases. there is no point where there is a dip in h.p., just a place where the h.p. gains are less. and i don't know until i see some of yours' 919 charts: maybe it's still making more than a stocker in that range. i don't care really, as it's only a 500 rpm band of less than ferocious power, below my normal operating range.
that dos based graph is in an unusably low resolution, or maybe eddy current dynos "smooth" much more than dynojets. i know that dynojets are "adjusted" to indicate a higher than actual h.p. and current eddy dynos are more realistic about peak numbers. but no engine on any real dyno makes power in straight lines, period. not internal combustion anyway. if you had a turbine or an electric motor, maybe. i've been reading dyno charts in the magazines for 30 years (so, maybe 1,000 dyno charts? ) and EVERY i.c. engine has lumps in the curve. like a well-fed anaconda! anyway, my bad i should've specified: honda 919s are my focus/concern.
no, my dyno tuner shouldn't be fired. there's only so much you can do with a/f ratio. the mechanical build of an engine counts for a lot and i designed away some of my midrange for drag racing. i use my midrange for approx. seven tenths of a second per run. remember: i've vowed to get into the nines with the wrong bike. we all love torque on the street, but in drag racing our wonderful torque-centric motor is not in its element.
if i was interested in playing trysies with my cam timing i'm sure i could make the curves look nearly anyway i want them to. and who knows? i may at some point. but that is the purpose of this forum exercise: i want to see the best parts and worst parts of all curves and compare. see if on average, i am happy with what i've got.
and no, when i did a 1.68 60foot, a 6.77/103.65 eighth mile, in the course of a [email protected]
quarter mile, i didn't feel a bog. the lengthened/lowered/piped z1000 that i beat didn't mention seeing me bog either.
nd4: dang right ! goes to show the integrated nature of engineering. change one thing, and everything else changes. i don't recall seeing a 919 chart without a trailing-off of H.P. before the limiter !