I just got back from my local Dynojet tuner ( to get a custom map done ) I did quite a few dyno pulls and the results surprised me. I actually made more power approx 2.5hp across the range with the K&N filter vs the stock one ( max HP was 115.3hp )I have read the RC51 web page and expected the opposite. Anyone else done some dyno pulls with a K&N vs stock? Re my mods the culprit?
these are the mods on the 919 so far
TBR single side ( I know, I know )
port and flow and about 0.003'' of the head
520 chain conv
galfer SS all around
Personally, I buy them for the easy clean characteristics. Pop em out, hose em down with degreaser and let them sit before rinsing out. Pretty easy and you got a nice 'new' filter. Performance.............don't beleive K&N. My ZX10R probably gained an RCH, but then again......maybe not!
“In my opinion, the M1 rifle is the greatest battle implement ever devised.”
General George S. Patton
I think he his refering to the write up by the RCV51 guy who dyno'd a 919 w/ and w/o a K&N and lost power witht he K&N. I thought that wirte up didn't make sence. Its nice to see someone tried it out. I also tried with stock filter and without one all together. No filter gained power. Only 1hp but it was the 4th pull and the bike was getting hot. Cooler probalbly would have been more like 2 hp. It also leaned out the bike from 12.5:1 to 13:1 air/fuel.