Vtec controller?

[aznstyler]

i got a b18c eg..
i already have a RSM, was thinking a VAFC

Any point in geting one? or pointless?
Does it make a differnce performance wise?
Is it bad to play with the vtec?

[vinnY]

yeah don't bother
better off spending the money on rego, at least it's useful

[DC2-PWR]

VAFC's are good and Bad.. depends what you want from them etc. APPARENTLY some OBD2 cars can re-learn around the VAFC's tuning parameters to essentially make it useless. I am not 100% sure of this I suspect it's an internet rumour LOL.

VAFC is limited as to what it can do compared witha proper stand-alone tunable ECU. it can only adjust the Air/Fuel Ratios and VTEC points (i dont think it can do ignition ?) and cannot alter your rev-cut etc.

there are cases where a VAFC is used in combo with an ECU but normally only for chipped ECU's (Spoon/Mugen/Hondata* etc) where some small changed to AFR and VTEC points are needed to allow for varying conditions or engine modifications etc.

I am considering a VAFC to ride piggy-back on my SPOON ECU as the Spoon ECU has the 180km speed limit removed, and a 9,000RPM rev cut - however I need some AFR tuning and want to RAISE the VTEC point - Spoon VTEC controller only allows you to LOWER the VTEC point.

*Hondata is just a chipped OEM ECU with the ability to have the chip re-flashed (and data logging ability).. but if you dont have all the hardware and software it's only as good as a chipped ECU as you cant alter the program set by your 'tuner'.

All the HARDCORE people will tell you that a VAFC is crap.. but for I/H/E modifications (or even a stock motor) with a competant tuner you can get some great results - i've seen 10-15 HP gain on an EK4 that completely changed the way the engine behaved (for the better!!).

http://www.d-series.org/forums/engine-management/77845-whats-vafc-good.html

http://www.jdmuniverse.com/forums/na-tech/82073-vafc-worth.html

http://www.b20vtec.com/forums/general-tech/39519-vafc-worth.html

http://www.sohchonda.com/forums/index.php?showtopic=9973

http://www.hondaprelude.to/forums/archive/index.php/t-12672.html

http://www.accordracing.com/showthread.php?t=5294

From experiance, it's usless on my b18c

[CRXDEL501]

vtec controllers are crap

[dness]

I wouldn't bother either.