Okay i just installed a V-AFC in my GSR and when would be the best spot to have the lo-hi VTEC and hi-lo VTEC engage??? someone said lo-hi - 5800 and hi-lo 5200??? also i heard that the stock VTEC engages at 4400... that correct??? 4400 sounds really low.

 

i thought stock hit at 5...good luck with the v-afc

 

can someone exlpain to me about what the V/T Unmatch fuel correction means exactly... in the V-AFC instructions i doesn't make any sense to me:

Hi<<L: this is when the VAFC turns the VTEC hi (on) but the ECU sets the VTEC Lo (off) (The engine will actually be set to the Hi cam.)

Lo<<H: this is when the VAFC turns the VTEC Lo (off) but the ECU sets the VTEC HI (on) (The engine will actually be set to the Lo cam.)

thats what the instructions say but its making no sense to me at this point... can someone explain to me what that actually means in easier terms?????

 

have a professional tune it on a dyno if you dont know what you are doing. stock is 4400.

 

leave at stock unless u have some mods done to it, otherwise it is pointless! and as stated above have some one tune it for u

 

yes i know have someone tune it for me.... all i was asking is for someone to tell me what that actually ment, i'm not going to fuck around with it... just would give me a good idea about what it actually does and how it performs...

need a better answer than "have a professional tune it on a dyno if you don't know what you are doing." thanks that helps me out a lot!!!!!

 

with my N/a set up i just raised my vtec engagement point to 5900 rpms and the difference was night and day as far as power and smoothness, but a VAFC should be one of the last things u should put on, cause i got that type of a gain only after i had done all of my cams, header, intake, and air intak and so forth and so on..

It basically alter the vtec engagment point and u can adjust the fuel ratios if needed, however the VAFC is very limited its it ablity to tune with.

 

in your first post you said:

that sounds like you want to mess around with it.

anyway....lo-hi is when the cam switches over to the big lobe, hi-lo is when it switches back to the smaller one.

 

ok the V/T Unmatch fuel correction is in % +/- 1%.... what does that mean

EDIT: i only got the V-AFC cuz i know if i didn't get it now i wouldn't ever probably get it... i'd be too into getting cams, intake mani, throttle body.... so now i don't have to worry about the V-AFC!!!!

 

if you have your stock intake manifold leave your vtec point where it should be...4400. when you get a new IM your going to have to raise the vtec point up due to getting rid of the secondaries. Only way to truely find out where your vtec should be is by taking it to the dyno and watching where your torque and hp cross or meet eachother.

as you can see since i put the skunk2 IM i need to raise my vtec point to about 5200, where i start gaining my power back