Ok guys i have a vafc controller in my 00 si and im running 8 psi for now on this unit my question is when i go full throttle under boost my a/f drops to 10.0 on my apexi turbo timer. I dont know how accurate this thing is but i dont want to lean my engine out. I have 450 cc injectors but when im crusin my a/f ratio is 14.3 or 14.2 when im off the throttle is 15-16.3. on my fuel map im increasing my full throttle control but my a/f is staying the same so someone out there please help me on this thanks. I know people are going to say get a chipped ecu but i dont have the cash right now
VAFC tuning issue
- Thread starter cuzzfolk99
- Start date
dude, I don't mean to hack at you but, it'll cost you more money in the long run using that afc hack than using a piggy back or standalone ecu. With it's unrealiable nature, lean it too many times...blah blah.
what size of turbo are you running
jason_guy_yeah said:
The VAFC is a piggy back...
I do agree that you are much better of just selling it and going with a chipped ecu and letting someone knowledgable tune the car. If you even have to ask if your turbo timer is showing the right voltage or whatnot un WOT, then i would def recommend letting someone with experience in tuning get ahold of the car, or you will be paying for more than engine management soon.
The turbo timer you are using is junk for displaying A/F, so please don't try to adjust things going by what it says. You still are running an O2 sensor, so that is going to keep your cruising A/F in check.
93turbo16 said:
oh
my bad I thought it was a hack93turbo16 said:
Oh I thought hondata was a piggy back system and aem ems was a stand alone?
Some people called rom tuning a piggy back, but it has WAY more functionality than a piggy back, so I don't call it that. It isn't quite a standalone, but is getting there. It is basically turning your ECU into a mini standalone if you wish to call it that.jason_guy_yeah said:
how's it unreliable? people choose standalones because they are inexpensive, offer an overall better tune and offer more settings like launch control, rev limit etc. the afc is reliable, just not the best tuning device used todayjason_guy_yeah said:
missunderstanding dude, I was talking about the afc hack and not the piggy back/standalone.
you can stick with the vafc, but get a wideband to check before making adjustments, the a/f on that will be just from your stock o2 sensor Which cannot give an accurate reading from anything outside the range of 14-15 So get a tuner with a wideband or buy/borrow one. Even still, getting a chipped ecu could result in a lot safer tuning
if i were you id go with hondata or chipped ecu with crome or uberdata. They will work the best in the long run and they actually might get bigger numbers out of your turbo.
Hello my name is Tim I am new to honda scene,I also own a galant vr4.
I am having the same problems with my car I have a civic hatch with ls/vtec turbo at 10 psi.The car also has a VAFC and 450cc injectors. The car runs and drives fine,but when I get on it and take it past 5500rpm the car bogs out and does not pull to hard to redline.The air fuel ratio is 14.5 at idle and 11.75 before 5500 rpm,then at 5500 it goes to 10.0 because thats the lowest my wideband goes.I then have to pull over and unplug the ecu, other wise the car barely runs and wont rev freely. I have also tried another ecu it did not help.
Any help would be greatly appreciated thank you.
I am having the same problems with my car I have a civic hatch with ls/vtec turbo at 10 psi.The car also has a VAFC and 450cc injectors. The car runs and drives fine,but when I get on it and take it past 5500rpm the car bogs out and does not pull to hard to redline.The air fuel ratio is 14.5 at idle and 11.75 before 5500 rpm,then at 5500 it goes to 10.0 because thats the lowest my wideband goes.I then have to pull over and unplug the ecu, other wise the car barely runs and wont rev freely. I have also tried another ecu it did not help.
Any help would be greatly appreciated thank you.
first off "if" that turbo timer is accurat (probably not) 10:1 isn't lean, its rich. you need to get a wideband. i believe you can use that turbotimer as a display also.
chipped ecu is better in my opinion, cause you can tune timing also, people have have ok results with tha afc hack tho.
standalone is obviously tha best, but i'm not payin for that, when you can be just as reliable with a chipped crome map. it just takes longer to get right, and doen't have all the features.
chipped ecu is better in my opinion, cause you can tune timing also, people have have ok results with tha afc hack tho.
standalone is obviously tha best, but i'm not payin for that, when you can be just as reliable with a chipped crome map. it just takes longer to get right, and doen't have all the features.
Dude, old post "02-25-2007"
junk the vafc for boost...chipped or stand alone is best