Whoa!
That's a shitload of advance with an AFC on part throttle, even at WOT!

I suppose this is one of rare good things of FMU.. no taiming advance, at least for low boost, as it's only good for that (I'm now at limit of it's usability.. 7psi) - but I don't have retareded my timing at all (stock, no BTM), and have no detonations..

So, actually ppl with AFC and 440cc injectors if have max boost at, let's say 6psi, end up few degrees in advance at WOT.. dam.. didn't know it really advances *that* much.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JDogg &raquo;</TD></TR><TR><TD CLASS="quote">obviously you dont understand how the vafc hack effects the timin map of the stock ecu. at the point where you need the most retard.. low boost 0-8 or so psi.. the btm isnt gona pull enough timing.. you would have to set it at the max retard per lb to do anything usefull in this area. however at full boost 10-11psi, you dont need as much retard, because the area of the ign map the ecu is reading from has alot lower timing there anyway.. </TD></TR></TABLE>

this makes perfect sense.. but the way i see it , an MSD 6 PLUS would do a better job. Why? Because you can pull timing all across the RPM range and help negate the advanced timing as a result of tricking the map.... and in the AFC hacks case it looks like it might be the better way to go. You see there are many people running the hack with NOTHING to controll their ignition and who dont have problems. Well it would be SAFER to have something to just back off that timing so your even safer then with nothing..

 

why don't you just throw the FMU on the car with the 450cc injectors like I did. I run 15psi daily on that set up no problems and my 1/4 times dropped .7 seconds and I picked up almost 3mph in the traps over the hack. and you never have to worry about timing advance. turbologist ran 11.2 on that set up...when someone on the hack runs 11.2 then I will say it is better

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by BoostedITR41 &raquo;</TD></TR><TR><TD CLASS="quote">why don't you just throw the FMU on the car with the 450cc injectors like I did. I run 15psi daily on that set up no problems and my 1/4 times dropped .7 seconds and I picked up almost 3mph in the traps over the hack. and you never have to worry about timing advance. turbologist ran 11.2 on that set up...when someone on the hack runs 11.2 then I will say it is better</TD></TR></TABLE>

im considering it actually

 

if you do that you will need some sort of check valves or whatnot so the map does not see boost.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by twkdCD595 &raquo;</TD></TR><TR><TD CLASS="quote">if you do that you will need some sort of check valves or whatnot so the map does not see boost btw... </TD></TR></TABLE>

but then i read about how many people hate FMU's and say hack is def a better set up.. im very confused. in the end i will probly end up witht he hack unless i can get very good arguements why the FMU set up would be preferable over the hack.

 

here is the best argument- the FMU doesn't advance timing and drives at part throttle much better than the hack

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by BoostedITR41 &raquo;</TD></TR><TR><TD CLASS="quote">here is the best argument- the FMU doesn't advance timing and drives at part throttle much better than the hack </TD></TR></TABLE>

Yep, but it also raise's your fuel pressure by an extreme. Not to metion puts added stress on your fuel components. Why not just save the $$ and get proper management. hen, you don't have any headaches at all...

 

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

Yep, but it also raise's your fuel pressure by an extreme. Not to metion puts added stress on your fuel components. Why not just save the $$ and get proper management. hen, you don't have any headaches at all... </TD></TR></TABLE>

it depends what ratio FMU you get.

 

BoostedITRs set up interests me. Adjustable FMU, 450cc injectors, 255lph fp, check valves, and an S/VAFC..

Now my question is, using this FMU set up in collaboration with an AFC, would this still lower map voltage and cause the ecu to throw ignition timing up? Basically i guess my question is, whenever you use a S/VAFC to tune fuel injectors does it always cause the ecu to do that, or does it only occur when on the hack.

OR could u use the hack , and missing link/check valves to do away with the timing problem?

 

Or just save up for Hondata, or just try Uberdata. Hmmm, what's more logical?

 

im running the vortech FMU, walbro 255lph hp pump and V-AFC, a greddy turbo kit (bov/FMIC etc)on a 99 civic ex auto. set at factory boost but gets up to to 7 psi sumtimes. timing hasnt been played arond with 2 much

as of now its untuned, stock exhaust, but i got my 450cc injectors and cat back system sitting at home and waiting for dyno soon

i detonate at 50% throttle around 5 psi like crazy..havnt been able to floor it for a long time, short on cash until now

i was gonna do the AFC HACK, but from wat ive been reading on this post, is my current setup better? the FMU over the injectors. My goal is 7-8 psi.

i wanna do it right, last thing i wanna do is install the injectors and rip out the fmu, and have a tuner tell me it still pings or have hp/tq # that suck ***

how good/relaible/tunable is the AFC HACK for 7-8 psi.....wat kinda hp/tq can be pulled out of this kinda setup? i cannot afford hondata, like i said my goal is 7-8 psi, i wont be doing internals or anything

 

I use 10:1 FMU and inline fuel pump... and have no detonations whatsoever @stock timing.

At 1st I tried to use larger injectors, but at part throttle I had problems... and it just didn't feel smooth (car was still NA). After fiddling with that for about a month or so I ditched that and got FMU, etc...
Now, with FMU I run 7psi, and car runs sooo smooth in boost or out of boost, and transition in boost is also smooth. I'm a happy man
However, I was (and still am) getting worried about higher fuel pressure when at full boost.

AFC hack is just that - a hack.. it does work, but has some side effects (advances timing, shitty at part throttle). FMU also works, and has it's own flaws (lack of tunability, high fuel pressure).

Only real tuning is a real standalone (AEM, hondata,...).

 

wat do u mean problems at part throttle, like ya part throttle, does it suck?
cause most of the time ill be boosting off lights, maybe until 5000-6000k at 50-60% throttle, not racing or anything but ya

i dotn wan my car running like ****

man shoulda saved up for honadata ***.....i cant afford to sell the v-afc, i got it for a good deal but u never get wat u paid for and hondata will cost at least 1000 cdn, with the ecu etc

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DawgPoUnd &raquo;</TD></TR><TR><TD CLASS="quote">wat do u mean problems at part throttle, like ya part throttle, does it suck?
</TD></TR></TABLE>

When just like keeping speed in 2nd gear at let's say 4000rpm I'd feel sputtering, as it just cuts of fuel.. also, for some reason I has occasional missfires also at ~4500rpm range.
It sucked... at 1st used SMT5 and 310cc injectors (came of honda prelude).. that tried to make my own custom made $hit that did same thing as AFC.. but there were still some issues... after that, ditched everything, stuck back original injectors and was happy again how smooth it was compared to before.
It's my daily driver, so I want it to be smooth. I dont plan to make huge amounts of boost (7psi now), so FMU will suffice.
I kno may people $hit on FMU's here... but for lower boost they work. I have it now for a 'lil more that 4 weeks, and am really happy how works. Smooth ride... even my mileage increased.... and needless to say how much better it drives now!

 

well i guess now my question is, would using a fmu check valves set up along with the use of an AFC , **** up your timing. Because we know that for the afc hack the afc causes the ecu to throw the timing up, and thats not what i want to happen. someone must be able to answer this

 

FMU will keep stock timings. while not in boost.
When in boost, it'll keep timing that is set in ECU for 0psi (check valve makes shure ECU doesn't see bost) at that rpm/throttle position.
So, from 0psi to let's say 7psi you have same timing.
While with AFC you'd be advancing at 0psi, and still at 7psi there would be some advance...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Nick7 &raquo;</TD></TR><TR><TD CLASS="quote">FMU will keep stock timings. while not in boost.
When in boost, it'll keep timing that is set in ECU for 0psi (check valve makes shure ECU doesn't see bost) at that rpm/throttle position.
So, from 0psi to let's say 7psi you have same timing.
While with AFC you'd be advancing at 0psi, and still at 7psi there would be some advance...</TD></TR></TABLE>

I see what your saying, but can you combine the use of an fmu, check valves, AFC, and a BTM and have a nice reliable set up, without having the timing issue that the hack gives you.

i would like to use the FMU/check valves set up with a BTM because basically you eliminate any ignition issues, THEN use the AFC to help tune and lean out..

 

yeah you can buy all that ****..... then what.. you spent enough $ to get some real managemnt and have a MUCH better running car

 

bump to get more oppinions

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JDogg &raquo;</TD></TR><TR><TD CLASS="quote">yeah you can buy all that ****..... then what.. you spent enough $ to get some real managemnt and have a MUCH better running car</TD></TR></TABLE>

I know... I told him this already, but some people just don't listen. I suggest spending all that $$ on a WBO2, and try Uberdata.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by BoostedITR41 &raquo;</TD></TR><TR><TD CLASS="quote">why don't you just throw the FMU on the car with the 450cc injectors like I did. I run 15psi daily on that set up no problems and my 1/4 times dropped .7 seconds and I picked up almost 3mph in the traps over the hack. and you never have to worry about timing advance. turbologist ran 11.2 on that set up...when someone on the hack runs 11.2 then I will say it is better</TD></TR></TABLE>


450s on a stock ecu must idle like ****. MY problem is im an OBDO b16a, i think i want to run the hack but turboedit seems pretty sweet and from what ive seen, uberdata too. There has to be away to compensate for this timing problem

 

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


450s on a stock ecu must idle like ****. MY problem is im an OBDO b16a, i think i want to run the hack but turboedit seems pretty sweet and from what ive seen, uberdata too. There has to be away to compensate for this timing problem</TD></TR></TABLE>

The timing problem can be controlled with a MSD BTM..

 

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


450s on a stock ecu must idle like ****. MY problem is im an OBDO b16a, i think i want to run the hack but turboedit seems pretty sweet and from what ive seen, uberdata too. There has to be away to compensate for this timing problem</TD></TR></TABLE>

idle is just like stock.....I am done posting on this thread cause people think the hack is beat all end all in set ups that aren't a stand alone. I know I have tried both and the FMU beats the hack in every way shape and form...period

 

thanks for your help guys. but because of this iffy feeling im having over the fmu set up and afc hack set up i decided im going with hondata for sure. i just got a price quote from wiredspeed.com and it seems very resonable...