My dyno sheets
so what the heck, i need advice, one is in SAE one is in STD... it was about 70 or so when it was done maybe a bit cooler.
i chose the stock map for the first run when i brought it in and the other sheet is the tune done.
no map on power commander = 98hp?? d&d slip on which sounds well broken in and a k&n filter
it should of been a 250i dyno so shouldnt i have all sorts of information? like what gear, or does that not matter?
also my bike is stinky now, i assume that is normal, but would like confirmation. and is that air fuel mix good for a f4i?

i chose the stock map for the first run when i brought it in and the other sheet is the tune done.
no map on power commander = 98hp?? d&d slip on which sounds well broken in and a k&n filter
it should of been a 250i dyno so shouldnt i have all sorts of information? like what gear, or does that not matter?
also my bike is stinky now, i assume that is normal, but would like confirmation. and is that air fuel mix good for a f4i?

Last edited by RudyGT; Nov 20, 2012 at 05:50 PM.
Looks like you got alot out of it!
At first glanse on my sheet below you might think that i wasted my money on my tune judging by the curves on top.
However it seriously felt like a new bike. I got alot better low and midrange power.
My bike has K&N filter and full akrapovic titanium system but it does not run as great as yours.
At first glanse on my sheet below you might think that i wasted my money on my tune judging by the curves on top.
However it seriously felt like a new bike. I got alot better low and midrange power.
My bike has K&N filter and full akrapovic titanium system but it does not run as great as yours.
I'd agree with rob, on a n/a motor you should be at 14 or less afr. But my exp is from cars as well, maybe bikes are different but 17.5 afr would make me nervous. Running that lean would account for the higher hp numbers but may not be so good for engine life
as stated in the post im having my own doubts and im not sure if i am reading the a/f right, where it looks like 13 and 14, after dropping to 12 at 4k rpm.
it also smells like it is running really rich, i was told it always ran rich so maybe it is cooking off crap in the exhaust.
when i close the door to the garage it will stink up the place, more-so now than it did before.
im going to see if i can go to another dyno that gives me a real dyno sheet and can also measure a/f ratio's, i have no idea why it says max there when the numbers don't line up.
and when i say real dyno sheet, i mean one in color and alot more info on it like the one posted above, it was done on a dynojet freaking trailer so i dunno.
it also smells like it is running really rich, i was told it always ran rich so maybe it is cooking off crap in the exhaust.
when i close the door to the garage it will stink up the place, more-so now than it did before.
im going to see if i can go to another dyno that gives me a real dyno sheet and can also measure a/f ratio's, i have no idea why it says max there when the numbers don't line up.
and when i say real dyno sheet, i mean one in color and alot more info on it like the one posted above, it was done on a dynojet freaking trailer so i dunno.
Last edited by RudyGT; Nov 28, 2012 at 07:00 PM.


