Honda Civic Performance - JDM Discussion Engine tech, forced induction, springs, shocks, brakes, tires, etc.

apex i VAFC ? any info on these

Old 23-Apr-2007, 07:13 PM
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apex i VAFC ? any info on these

can anybody tell me wat this thing does and is and please dont waste space and tell me 2 get one or not id like a valid response as to why i shouldnt or should! thanks again !
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Old 23-Apr-2007, 09:47 PM
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I am pretty sure you can get better results with a tuned ECU as long as the person knows what they are doing. I have heard great things on here about Zeeman. It seems for the price of the apexi unit you cold get a nice tune on your ecu.
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Old 23-Apr-2007, 09:55 PM
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we tell us not to waste space.. but this thread could be answered with a simple search.

What this thing does is it allows you to adjust your ignition timing and fuel maps. Simply put.

There are way better options out there and I think hack's are an un-educated persons purchase.
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Old 23-Apr-2007, 11:05 PM
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actually i tried to search for the VAFC not II model but just the VAFC model and couldnt find a description. Could you guys give me some pro s and con s on using either a tuned chip vs a VAFC system thanks
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Old 24-Apr-2007, 12:22 AM
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Originally posted by chris_v2
What this thing does is it allows you to adjust your ignition timing and fuel maps. Simply put.

There are way better options out there and I think hack's are an un-educated persons purchase.
Actually VAFCs have no control over the ignition timing and it adjusts the fuel (+/-) by modifing the MAP sensor signal, and basically tricking the ecu into thinking its running under different conditions. This is what makes vafcs and other piggy back units crap. As you add fuel it changes the map sensor signal and adversely changes the ignition timing, which is bad, the whole point of tuning is to be able to adjust the fuel separately from the ignition timing. So as you need to increase/decrease fuel somewhere it will be changing the ignition timing, which usually results in a dip in the torque/power and sort of a choppy powerband.
Also, if you lower the vtec engagement point from say 5500 to 4500rpms (trying to make the car faster, which it won't) the ecu won't switch over to the vtec fuel/ignition maps until 5500rpms, so at 4500rpms when vtec engages you'll still be running off the non-vtec fuel/ignition maps. The same thing happens if you are setting the vtec higher than what its set to on the ecu. So if you have a chip with the vtec engagement at 5000rpms and you set it to 5800rpms with the vafc, from 5000-5800rpms you will be running off the vtec fuel/ignition maps (b/c the ecu will be switching over at 5000rpms where the vtec engagement is set to) but in actuality the engine will be running off the primary/secondary lobes (non-vtec lobes).


Like someone else mentioned, for the price of a vafc you can get a custom program made in crome (street tune).
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Old 24-Apr-2007, 10:52 AM
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awesome thanks man!!!
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Old 24-Apr-2007, 05:17 PM
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Originally posted by zeeman


Actually VAFCs have no control over the ignition timing and it adjusts the fuel (+/-) by modifing the MAP sensor signal
sorry mr tuner man. I'll give you a cleveland steamer next time i see you
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Old 24-Apr-2007, 05:31 PM
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promise?...lol
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Old 24-Apr-2007, 05:33 PM
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Yes m'am.

I still haven't seen the new place.. whenever i decide to get off my lazy *** and see it i'll give you a steamer, no worries! Maybe i'll bring italfag and frosian with me
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Old 24-Apr-2007, 05:51 PM
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well, what are you waiting for?...its been a while since a guy has rubbed his dick in the **** he just took on my chest....lol
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Old 24-Apr-2007, 08:05 PM
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hahaha please lock this PLEASEE!!! scary **** going on in my thread lol
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Old 24-Apr-2007, 10:33 PM
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Originally posted by zeeman
well, what are you waiting for?...its been a while since a guy has rubbed his dick in the **** he just took on my chest....lol
i haven't ever really had this done
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Old 24-Apr-2007, 10:37 PM
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hows tomorrow for you andrew?

maybe i'll throw in a Carl twist.
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Old 24-Apr-2007, 10:40 PM
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perfect
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Old 24-Apr-2007, 10:42 PM
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man.. do I ever have stories for you. lol you'd laugh like a girl if I told you what happened... oh wait.. you always laugh like a girl
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