iLOVEmyEMone

Alright so i am thinking about gettin the apex'i VAFC II and i wanna see what you guys all think about so give me it all the positives and the negatives. please any help will be grately appreciated

ROK801

its black and shiny...

sicky

How's this for an answer:
Now for VAFCs or any other type of VTEC controller. They simply provide +12v to the VTEC solenoid at whatever RPM is specified. Some of you may think this is great. BUT (There's always a but isn't there) the VTEC controller does not communicate with the ECU in any way, shape, or form. The ECU has two separate sets of maps that it uses for VTEC applications. A low cam set when VTEC is not active and a high cam set when VTEC is activated. When ECU engages, the ECU switches maps to provide the engine with the correct ignition curves and fuelin for the higher cam lobes. Even though you can specify when the VTEC engages with a VTEC controller the ECU still switches maps at it's stock programmed point. If you set VTEC lower than stock you are in high cam while still running on the low cam maps until the ECU's programmed point. If you set VTEC higher than stock you're in high cam maps while you're still in low cam from the ECU's stock point until the VTEC controller's set point. Adjusting the VTEC point with a VAFC can cause a lean or rich condition and force you to use the VAFC to adjust fuel during the tuning process, which would adjust your ignition timing (as mentioned above) even more. Now, not only are you not in the correct maps, but the VAFC is changing the MAP sensor voltage and your ignition curve is going all over the place.

Try searching, would have found this for yourself.

GetawayInMoscow

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by sicky &raquo;</TD></TR><TR><TD CLASS="quote">How's this for an answer:</TD></TR></TABLE>

Excellent post!

sagron69

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by sicky &raquo;</TD></TR><TR><TD CLASS="quote">How's this for an answer:
Now for VAFCs or any other type of VTEC controller. They simply provide +12v to the VTEC solenoid at whatever RPM is specified. Some of you may think this is great. BUT (There's always a but isn't there) the VTEC controller does not communicate with the ECU in any way, shape, or form. The ECU has two separate sets of maps that it uses for VTEC applications. A low cam set when VTEC is not active and a high cam set when VTEC is activated. When ECU engages, the ECU switches maps to provide the engine with the correct ignition curves and fuelin for the higher cam lobes. Even though you can specify when the VTEC engages with a VTEC controller the ECU still switches maps at it's stock programmed point. If you set VTEC lower than stock you are in high cam while still running on the low cam maps until the ECU's programmed point. If you set VTEC higher than stock you're in high cam maps while you're still in low cam from the ECU's stock point until the VTEC controller's set point. Adjusting the VTEC point with a VAFC can cause a lean or rich condition and force you to use the VAFC to adjust fuel during the tuning process, which would adjust your ignition timing (as mentioned above) even more. Now, not only are you not in the correct maps, but the VAFC is changing the MAP sensor voltage and your ignition curve is going all over the place.

Try searching, would have found this for yourself.</TD></TR></TABLE>

owned...

sicky

Wasn't trying to own anyone, just educated some people that needed it.

tomej8

damn! definently ipressed with that answer! but, just because you have a vetec contoler doesnt mean its strickly for changing the low to high cam engagement point. ive seen 17 horse power out of a b16 just by remapping the fuel curve, by the way his vtec engagement is 50 rpms fewer than stock. also it can be used as an anti theft device. the vafc 2 has a special memory ship in it, i believe its called eprom, but i might be mistaken on the name, this allowes the unit to never loose memory even if their has not been power running to it for months at a time. thus allowing you to pull it every night. i do this and my car was recently stollen. the car ran so friggen horrible that they only made it two houses down. but from a tuning stand point i believe its a must for a semi budget honda builder. WOULD NEVER RECOMEND TOUCHING THE SETTINGS UNLESS ON DYNO ALONG SITH WIDE BAND 02!

AzntaggeR

or how about ditching that and getting a real fuel management system.

flood

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by AzntaggeR &raquo;</TD></TR><TR><TD CLASS="quote">or how about ditching that and getting a real fuel management system.</TD></TR></TABLE>

yeah get some side draft carbs...they rock

SkankyEJ7

hondata

do VAFC eliminate the speed govenor

komat

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by hondakid1 &raquo;</TD></TR><TR><TD CLASS="quote">hondata

do VAFC eliminate the speed govenor</TD></TR></TABLE>
no sir
but hondata will

flood

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by komat &raquo;</TD></TR><TR><TD CLASS="quote">
no sir
but hondata will</TD></TR></TABLE>

Wont Uber and Crome as well?

Slow EJ8

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by sicky &raquo;</TD></TR><TR><TD CLASS="quote">How's this for an answer:</TD></TR></TABLE>

Wow dude great info. I never even thought about the different maps and that the low cam map would still not be used until stock ECU VTEC point.

GetawayInMoscow

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by flood &raquo;</TD></TR><TR><TD CLASS="quote">

Wont Uber and Crome as well? </TD></TR></TABLE>

Hell yeah they will. All you have to do is uncheck a box.