Soley re-mapping ICU\'s for more HP, how does that work?

[OB_easyrider]

This is a serious technical question, I am not mocking anything this time.
How does remapping the ICU alone increase HP if the redline has not been changed? Are the current specs running lean or rich at certain spots? Did they do a poor job for the initial mapping? Without changing the exhaust how do they get the extra flow? It may be a dumb question but I thought power was related to how much air/fuel you could cram into the chambers and how high you compress the mixture. Without changing anything other than fuel injection how do you cram more fuel in without running rich and clogging? Or are they playing with the ignition timing? If they advance the timing won't we run into pre-ignition problems?
Tech help over here please?

 

[OB_Zarniwoop]

You're presuming that they are infact re-mapped and not replaced with something else.

Frats

Z

 

[Guest]

Easyrider, the general opinion is that to meet the fairly harsh pollution emmission requirements of the United States and most western world countries, Suzuki did what most of the bike manufacturers do and made the stock "map" a touch on the lean side.

Running a fuel injected engine a fraction lean reduces the emissions a few percent and increases fuel economy a few percent. Many car makes do the same with their fuel injected cars also.

A few people have found that just by "remapping" the fuel injection they have picked up some hp. This can be done on the 'Busa without buying a new ECM, but some people prefer to go one step more and get a PC2 which provides more fine fuel tuning.

 

[OB_easyrider]

thank you for your information.

Dale