Effects of modded air box

[Ivan]

Approximately, how much is it to have your fuel system remapped and how bad do the mpgs suffer?

You need a Power Commander and about 3 hours on a dyno.  I don't know how it would affect your mpg, my S2R1K gets around 42 mpg unless I'm really flogging it.

[Ivan]

True. But the gains at lower RPMs are more related to the remapping than they are to the open airbox. If you remap your bike you'll see gains down low because you are "fixing" the fueling restrictions that are in place in order to meet emissions requirements.

I should have qualified my statement, but it thought it was obvious...  IMO there is nothing to be gained by opening the airbox unless the fueling is modified accordingly.  Without a change in fueling, it will likely run worse at all rpms because an already lean engine will be that much leaner.


Edited to add:  I understand that some have had good results by just opening the airbox, but when I had my bike dyno'd with the stock ECU, no PC, and open airbox,  it showed that the AFR was higher than 18.  I think it is really a crapshoot, so if you're not going to invest the time/money to do it right, you're better off not changing anything.

[Scotzman]

Thanks for the input. I think I'll just leave it stock for now instead of dealing with remapping it. The beautiful sound of chopped exhaust is good enough for me now anyways. Plus, there's no issues getting to the safe and legal limit on the freeway .

[♣ McKraut ♣]

yeah, the sound is cool for sure, but i tried it on mine (stock mapping) for a little while and had to go back to a stock lid; it made already present popping condition even worse.  maybe some day if i decide to get my ECU flashed, or go the pcIII route again...