red_ek_hatch

im running a itr ecu with my b16 swap . currently my vtec kicks in at 5500 rpm's . is it worth getting a apexi VAFC ? would i be able to adjust my vtec to kick in at a lower rpm with the VAFC ?

jlacoy82

Yup, you would be able to adjust it. The likelihood you would gain power is small to none, but sure, you could change it.

red_ek_hatch

i have a adjustable fuel pressure regulator and adjustable cam gears . both are at stock settings . friend of mine told me to get a vafc and get all of that tuned at the same time and that i should gain around 15 hp at the wheels . is he right ? so what would be the maine purpose to get the vafc ? like i said im running a itr ecu wich makes my vtec kick in at 5500 rpm's . what difference will that VAFC do ?

WildPig

I would say that the main purpose in your application would be fuel leaning/enrichment. The VAFC is a piggyback fuel controller too that can set fuel settings by rpm increments so it's not only for vtec settings.

And I agree with your friend, get a vafc and get it all tuned at the same time on a dyno, it could possibly help you out as much as 15 whp.

red_ek_hatch

currently im runing intake , comptech header , test pipe, catback exhaust , skunk 2 intake manifold , b&m fuel pressure regulator , aem cam gears , ground kit . so the VAFC will do a difference in performance ? theres a guy selling one for $180 . is that a good
price ? its the 1st gen VAFC . i might go pick it up today but i want to make sure its a right desicion by askin the pro's here in H-T so worth it ?

red_ek_hatch

whats the lowest rpm range i can set the vtec at if im already running a itr ecu ? currently its kickin in at 5500 rpm's .

WildPig

It's not "how low can vtec be set at", it's what the optimal vtec crossover point?

If you set your vtec point the lowest you can, you WILL NOT see a performance gain, in fact it will most likely hurt your engine.

Like I said before, get it dyno tuned by a pro and they'll set it to the best and optimum crossover point for horsepower which probably isn't far from 5500 rpms.

Research how vtec works before you try to mess with it yourself.

red_ek_hatch

well no matter what im goin to get it tuned by a "pro" along with the fpr and cam gears . is $180 for a used VAFC 1st ver. a good price ?

red_ek_hatch

bump

omg_miiiike

yes. i think it's worth getting. i have mine set at 5500 on a b16a, i have found the higher the better, but then again i have cams..