Ive been reading around and a lot of people have said that a VAFC is "junk" Why r they junk? I just want something that I can tune the car to get my A/F a little better and to change my VTEC engagement point. What other options are there that are decently cheap.

 

They aren't junk. For their price, they serve their function well. Its just that most people who are into modifying and tuning their cars prefer products such as hondata, neptune, or even crome to get the most power out of their ride. With these systems you have a plethora of variables to tune. Nothing wrong with a VAFC at all.

 

I think its just because you could get a hondata for not much more money. It was cool back in the day but now theres more out there and a VAFC is just kinda outdated.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Rosko &raquo;</TD></TR><TR><TD CLASS="quote">I think its just because you could get a hondata for not much more money. It was cool back in the day but now theres more out there and a VAFC is just kinda outdated.</TD></TR></TABLE>

correct me if im wrong, but the s200 is about the same price

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by hu &raquo;</TD></TR><TR><TD CLASS="quote">They aren't junk. For their price, they serve their function well. Its just that most people who are into modifying and tuning their cars prefer products such as hondata, neptune, or even crome to get the most power out of their ride. With these systems you have a plethora of variables to tune. Nothing wrong with a VAFC at all.</TD></TR></TABLE>

With these systems, dont you need to know how to tune your own car then? I was under the assumption that the VAFC is just very user/Newbie friendly

 

Even with a VAFC you should tune on a dyno. That way you can get your air/fuel at an optimum level instead of guessing. With the VAFC you can only lean out the mixture. If you wanted to add fuel at all, you would need a fpr. For Neptune, you have to have someone who is licensed to carry the product, tune it. I am not sure about Hondata. Crome is a free program, and I know nothing about tuning with crome.

 

What have you done, mod wise to you car? Your goals as far as modifying your car should determine which tuning system you go with.

 

Im gonna say this....if you have big horsepower plans for your car in the near future your best bet is to invest in a standalone fuel management system. VAFC is for tuners who have limited modifications and is a great system for starters and low horsepower engines that dont require much fuel and timing alteration. Hondata S300, Neptune, Crome, ect are all capable of realtime datalogging and come with far, far more tuning capabilities compared to a VAFC.
I am personally going with the Hondata s300 unit.

 

yes...my VTEC hits at 5k RPM and i love it. I'm not into hardcore tuning and i still love my old VAFC.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by curbsmacker &raquo;</TD></TR><TR><TD CLASS="quote">Im gonna say this....if you have big horsepower plans for your car in the near future your best bet is to invest in a standalone fuel management system. VAFC is for tuners who have limited modifications and is a great system for starters and low horsepower engines that dont require much fuel and timing alteration. Hondata S300, Neptune, Crome, ect are all capable of realtime datalogging and come with far, far more tuning capabilities compared to a VAFC.
I am personally going with the Hondata s300 unit. </TD></TR></TABLE>

better watch your nomenclature there friend..hondata's are not standalone...anyway go with something like crome(free) or hondata...its the same if not a little more in price and youll get more out of the tuning without a ceiling of tuning (the vfac only can add so much fuel)

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Boarderx192 &raquo;</TD></TR><TR><TD CLASS="quote">What other options are there that are decently cheap.</TD></TR></TABLE>

OBD1 freeware editors...like Crome, or Uberdata. Crome seems to be all the rage these days though.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Featherfire &raquo;</TD></TR><TR><TD CLASS="quote">

OBD1 freeware editors...like Crome, or Uberdata. Crome seems to be all the rage these days though.</TD></TR></TABLE>

some tuners ive spoke with tend to favor crome..they say its easier to work with..
but some still like uberdata...ask your tuner what he likes before you order it

 

Here are my cars mods:
Drivetrain Mods:
Center force dual friction clutch
Fidanza Flywheel
Quaife LSD
New axles

Engine modifications:
New engine with less than 9k before build up
Crower springs and valves
OEM retainers but Crower titanium retainers included.
MSD 8.5mm red spark plug wires
Short ram intake
DC 4-2-1 header

Doesnt seem like a lot but I plan on getting cams and a better header in the future. My car runs rich as **** right now so I need to tune it a little but. When I hit VTEC, You can see a big cloud come out of my exhaust.

 

I'm looking to hit the 250 hp range......right now I have basic bolt ons, but I also have an sh, so I don't want to lose the ATTS system.

my build goal are:
type S pistion
rebuild bottom end
skunk 2 stage 1 cams
45 degree valve angle
mild p&p
smsp header
Euro R intake Man.

I already have a fuel rail with, a pressure regulator and cams gears (so any cam adjustment suggestion with stock cams is welcome), will a VAFC suffice a 250 hp goal with the setup I metioned. Is there anyother aftermarket piggyback sys. that will allow better fine tuning of the ecu stock parameter.

also hows tuning options for the e-manage; could it enrich fuel, adjust ignition timing, and Vtec engagement.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by LINK76 &raquo;</TD></TR><TR><TD CLASS="quote">I'm looking to hit the 250 hp range......right now I have basic bolt ons, but I also have an sh, so I don't want to lose the ATTS system.

my build goal are:
type S pistion
rebuild bottom end
skunk 2 stage 1 cams
45 degree valve angle
mild p&p
smsp header
Euro R intake Man.

I already have a fuel rail with, a pressure regulator and cams gears (so any cam adjustment suggestion with stock cams is welcome), will a VAFC suffice a 250 hp goal with the setup I metioned. Is there anyother aftermarket piggyback sys. that will allow better fine tuning of the ecu stock parameter.

also hows tuning options for the e-manage; could it enrich fuel, adjust ignition timing, and Vtec engagement.</TD></TR></TABLE>

anywhere near 250 you will lose your atts...a vfac could add enough fuel for bolt ons and mild cams but thats about it your gonna need to go to a piggyback or if you wanna shell out you can get an emanage...

biggest problem you have is that setup...it will not get you to 250 id say at the most youll see around 235 and that all depends on whos doing your "mild port and polish" youre gonna need more compression, bore, and/or stroke bigger cams and a seriously good head porter like Brad @ RLZ to crest the 250 whp h22 mark

 

sorry for going of the topic, but how much is the head job from RZL. and what kind of porting techique does he do that's better than other; becuase it can be so controversial as far as roughing up the runners or smoothing out the runners.
I was thinking of sending mine's to R&D where its CNC computerized porting (guarntee 15 whp just with p&p on stock setup)


Also is that AEM standalone compatiable with ATTS............Man only if I got the green backs. all of this decimating guess work will be out of the picture.

 

thats a negative..

yea i was talking to the wheels...whos got an engine dyno laying around anyway?

 

my whole idea about Vafc, there are used when the achievement its to change that big dip in the (H22) to more straight line going up in your dyno. they average about 5-10 ponies more than untuned but the more benefitial factor its to change that big dip.see the dyno in this page.

http://absoluteprelude.com/for...ID=83

 

i'll be more than happy if I can get 235 whp. so I guess with that setup I mentioned is more than enough to hit the 235 whp zone.

I really want a streetable car where drivablity and emission is not a problem, but I also what to be able to have the capabilities to change map setting for the track.

what is the most whp with the ATTS operational? which leads me to my next Q.. is it true that you can get over 250 whp with the ATTS unit intact but it will be inop. but I'm guessing that alot of that excessive hp will be lost thought the diff. setup on the sh and will probably hinder the ATTS unit down the line. so thier really no point in reach that range of hp.

 

thank for the in depth hyperlink of the VAFC.
after reading the capabilities it offer for it price; it's actually not bad at all.

 

yea its not that bad but i looked at it like i can spend about 100 more and have a hondata setup

 

Because Apex is garbage!

 

but if u got the money a better choice is P72+hondata(whatever stage)for a h22(remember 5th gen Ecu is obd2 so cant be use for hondata but u could use p72 or a p28 odb1 for the 5 gen)(for the newbies ) it would most likely give more hp than Vafc (it all depends in your mods done) and if you get it well tuned. and thats .02cents for yall.


Modified by Dameltajo at 9:43 PM 2/2/2006

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Dameltajo &raquo;</TD></TR><TR><TD CLASS="quote">but if u got the money a better choice is P72+hondata(whatever stage)for a h22(remember 5th gen Ecu is obd2 so cant use it, one of the Ecu's obd1 that would work for the secondaries in the intake would be p72)(for the newbies ) it would most likely give more hp than Vafc (it all depends in your mods done) and if you get it well tuned. and thats .02cents for yall. </TD></TR></TABLE>

wrong..wrong...and WRONG

you can use it with a 5th gen just get an obd1 jumper harness(my brothers 96 has one) and you can get away with using a p28..you can either wire it up to do secondaries or you can suck it up and leave the secondaries open all the time..its what i did and its not like i have v8 gas milage

 

Well its junk because it alters the map sensor signal and this affects timing and fuel at the same time. When you are full load, you cannot add fuel or retard timing. All you can do is take away fuel and advance under full load. So when you make modifications where your bringing in alot more air and maybe raise compression/turbo you need more fuel and different timing advances, and it doesnt do that.....soo its junk. Hondata or other programs can make adjustments to both fuel and timing maps seperately, and thuse yu will have a proper and safe tune. So apexi can work with slight mods and take away fuel and advance timing when its needed because on stock cars sometimes they make them too safe and overly richen/retard timing. So blah its junk. It depends on your modifications. I/H/E ok use a vafc even though it barely helps. If you mod further...........no way to vafc.