Question about af/r.

[Coder]

Hi there i am using the cold air intake calibration that comes with
the hondata,but when i was tuning a few days ago i saw a
af/r dip around 4500-5000 rpm is this normal??

I use hondata prb ecu...see log...

I suppose i just lean it out??

[Spunkster]

Have you tried that yet?

[Coder]

No i haven't tried yet,but i am afraid it will knock if i lean it out to much.
I thought you have given the calibration that much fuel so it wont knock.


I think it is the vtec engaging which is making the fuel goes rich,so all is okey.

[Coder]

solution,raise vtec low boundary to 5000-5200 rpm
set vtec low and high to 3000 rpm adjust fuel.
set vtec low and high to 6500 rpm adjust fuel.


I didn't look at vtc crossover but the car runs nice.

Thanks hondata for all help.

in regards.