Finished about 7 hours on the Dyno (dynojet 150) last night with a friend who is a Bike Mech. Corrected SAE HP, but no corrections were made for humidity. It was humid so the numbers may have been a little low without the correction.
156HP with full micron, Yosh--+5,+5,0.
153HP with full micron, PC2--map.003
Modified airbox on all runs.
air filter BMC or stock no difference.
remove air box lose 1 hp or the same.
Micron/PC2 more power through midrange-45mph-110mph average 4-5 hp more. YOSH made 3hp more from 115mph - 158mph.(4th gear pulls)
Lubricate my neglected chain--2-3 HP!! won't neglect this anymore.
Stock ECM with full micron--155hp peak, crap idle terrible drivability, crap midrange.
We couldn,t get the PC2 to match the YOSH up high, but rec'd some tips today as to maybe why from DynoJet.
The Busa is very sensitive to airbox temp. According to DynoJet, this may have come into to play with variables between runs. They actually put a resistor in to fix the temp. for comparison purposes.
When the two maps were compared in "Race" mode (4th gear pulls) the PC2 bike wins due to the midrange.
But, I suppose if you were keeping it up there 10,000+ til shift the YOSH would have won. Drivability feels better with PC2 overall. We did compare the two using the dyno by making 2-6 gear runs. Thats the fun part!! (In race mode they are very close, could be driver error though)
Anyway, don't put too much weight in all of this. ONE NIGHT, ONE DYNO, ONE BUSA.
For the average guy, using the PC2 "as is" is the smart thing to do and make changes only after using a DYNO that can read RPM, Exhaust gas, and can load the bike so can evaluate the different throttle/rpm points. They did their homework and have a hell of alot more resources. Otherwise you will chase your tail for LONG time. Improving the low map is less difficult than making changes to the high and "going for a ride".
I gotta believe the PC2 will catch up and maybe pass after more work at the upper rpm's. OR, maybe the variables between runs is too great and thats the difference? We finished (quit) after midnight and made 30 runs of which 15 were used. 2nd pass is the keeper.
I will make many more runs in the future and now have the YOSH BOX too! (its quick and easy) If Anyone needs a quick change? I will do it cheap, but you have to come to me in Chicago, or secure the box with money if I ship it.
Now why only 156HP? I asked DynoJet and they say this bike is difficult to load on the street, due to its power, so it could take quite a few driven miles to fully break in. A good portion of the almost 15 hp increase they show on the chart, I rec'd from Micron, over stock is from break-in. My bike has 2100 miles. They began with a new bike. I may have to put the stock set-up back on for comparison.
I did receive an e-mail from badbus (see Yoshimure Fuel Mgt. Box settings)with his gif. file. His curve is very similiar to mine with the YOSH box on, chain not lubed. hehe
I am not going to send e-mails of these curves all over the place. If you have run on a DYNO with corrected SAE HP numbers, and have your DYNO sheets, I would happy to discuss this further. The missing part of all this numbers rhetoric is the drivability part of it.
Also--it is very easy to make the DYNO read what you want, if you want to.
SYNC. your throttle plates, biggest improvent in drivability for me as my 1&4 plates were out. This may have contributed to my hicup problem.
I'd like to think this DYNO was off, the humidity was high with no DYNO correction, and the ramair wasn't working. And, lets hope the breakin theory is right. Oh yea, and the moon was out.
But, reality now is 156HP peak, decent improvement in mid-range over stock.
Don't believe everybody without the Dyno sheets or E.Times in 1/4 mi. Especially if there is money to be made, or pride involved.
Bob
ramair1@flash.net
