vtec setting for ex with vafc 2?
Thread Starter
Joined: Jun 2003
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From: Macon GA
Rep Power: 300 




vtec setting for ex with vafc 2?
i am installing my vafc 2 tomorrow and i was wondering what the best vtec setting (or any other stiings i might need) for my 02 ex. if this has already been discussed could you please direct me to the right thread. i cant seem to find any for the ex only lx and dx and i know that the ecu for the ex is slightly different.
thanks
thanks
Joined: Sep 2002
Posts: 51,241
Likes: 20
From: NV
Rep Power: 811 










VAFCII tuning numbers: They only tuned the wide throttle, because the others were already pretty close. I have an auto, and they ended up using 2nd gear because 3rd didn't work well.
Also, they set the vtec to engage at 2800rpms, but I put it back to stock. I don't know exactly how the vtec works, but someone said you need 100% throttle to activate it and turning it on too low is bad (not enough oil pressure).
Wide High Vtec
2600 +4
2700 +4
3000 +4
3400 +4
3600 +3
4000 +3
4400 +3
4800 +3
5200 +3
5800 +3
6400 +1
6900 -2
vt cont (put back to stock ****)
L-->H 2800 rpms
H-->L 2700 rpms
Throttle
25% narrow, 80% wide
Also, they set the vtec to engage at 2800rpms, but I put it back to stock. I don't know exactly how the vtec works, but someone said you need 100% throttle to activate it and turning it on too low is bad (not enough oil pressure).
Wide High Vtec
2600 +4
2700 +4
3000 +4
3400 +4
3600 +3
4000 +3
4400 +3
4800 +3
5200 +3
5800 +3
6400 +1
6900 -2
vt cont (put back to stock ****)
L-->H 2800 rpms
H-->L 2700 rpms
Throttle
25% narrow, 80% wide
Joined: Sep 2002
Posts: 51,241
Likes: 20
From: NV
Rep Power: 811 










i would use the throttle settings but not the a/f numbers. No way will they be the same. That was done with a pnp head and header. Most people actually have those at negative.
the best way to mess with your air/fuel is spend the 200 or whatever dyno charge around you for a hour of tune and dyno time. I know around here is about 150 for a vafc tune and dyno. That gets you a good amount of pulls and they usally come up with 5-10 whp depending your mods you have at this point.
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