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Hondata Reflash FN2

Posted: Sat Jul 18, 2009 1:08 pm
by Akula
Hello Hondata,

One question, why the reflash fn2 is so rich under 3800rpm ? (under the vtec)

Thanks in advance, best regards!


Posted: Mon Jul 20, 2009 9:21 am
by Hondata
Do you have a dyno graph? If it is running rich under 3800 rpm then it could be the AFM signal is getting altered by the intake configuration.

Posted: Thu Jul 23, 2009 1:30 pm
by Akula
thanks for the reply,
my fn2 is stock, i have a normal BMC panel filter only, (like K&N)

here a dyno graph:


here another one, reflash on my fn2 vs another fn2 stock


Best regards!

Posted: Thu Jul 23, 2009 1:51 pm
by Hondata
The ECU will run closed loop for some time under full load conditions - normally until 3800 rpm, but sometimes there is a time factor as well.

Posted: Thu Jul 23, 2009 2:02 pm
by Akula
thanks for the fast reply!

you mean that with passing of the time under the 3800 the ecu will change and become less rich or run more better ?

Best Regards!

Posted: Thu Jul 23, 2009 5:53 pm
by Hondata
The time frame is in the order of 0-10 seconds. The ECU runs closed loop for a while after you give it full throttle, then switches to open loop. It also seems to switch at 3800 rpm to open loop.

Posted: Fri Jul 24, 2009 9:40 am
by Akula
ermm, sorry Hondata but .. :)
what do you mean with "closed loop" and "open loop"