does anyone know the exact vtec engagment of a 99 si ?....from lo to hi and lo to hi
cuzz when i initialize and reset the vafc...its lo to hi 5800 and hi to lo 5400

 

my question ...what is the oem ..stock...factory setting........again the vafc..on initial setting says lo to hi cam 5800 and then hi to lo 5400
so what is stock with no vafc ?

 

i would put it on 5500 like the man said, its not like afc knows what kind of car you have. thats why your there, to help teach it. good luck

 

The reason why you do not have VTEC engagement and disengagement at the same point is this: Imagine if it engages and disengages at exactly 5500, and you are driving right in that range, 5455-5600 RPM. The VTEC is going to rapidly turn on and off and your car will buck like mad. Instead if it comes on at 5800, and stays on even if you're at 5500 etc until you drop below 5400, no bucking. I worked with an aftermarket EMS for a time and there are a vast number of features that are controlled this way to prevent the feature from rapidly switching on and off, though I forget the correct term for this method of prevention.

 

what is the oem ..stock...factory setting

 

I think its 5700 rpm is the stock setting

 

its 5600 i kno for sure i have the 00 si 5600 trust me

 

does anyone have a lkink to like honda or something..i already did a search and cannot find it

 

anyone???/...........

 

For your cars safety and to save yourself some headaches just don't use the vafc, don't change any settings, don't do anything. May as well just unplug it or enjoy the pretty readouts if you're not going to let someone who knows what they are doing, a tuner, mess with it. Just trying to help out here.

 

why dont u just hook up a vtec light indicator? I know it might sound RICER like, but it works and i know exactly when my vtec engages when my led goes on.

 

I can hear mine... no mistaking it...

 

u don't need a light for a si. just put an intake on it and you will clearly tell when engagement hits.

 

only with the headers installed, thats when i could here it. I was under the impression that vtec engages at 5500 rpm on my stock d16z6. with the light and the headers installed. light and sound kicks in at 5000 rpm.. oh wells..

 

vtec is getting married?

 

u guys are not understanding my question ..with the preset initializing for the vafc..before i touched it ...it reads and it also i can hear it engage at 5800 and shut off at 5400...then i did the same on a s2k ..same thing...so the question is ..what is the stock setting ??

 

i thought is was like 5500 but yeah u should be able to hear it