X2BOARD

I know the dangers of the FMU setup on stock injectors, but at such low boost (5-7psi), with 310 injectors + FMU would work, but so would 440s + Hack.

But since the hack has it's issues (some hesitation, advanced timing in the low end) I am wondering if the FMU setup (w/ btm/link) would be better at that boost.

Any opinions ?

X2BOARD

Bump for the daylight hrs...

psileepR

hesitation? if u mean bucking then ya... just learn to drive around it ...

my afc hack = smooth transition in and out of boost. pretty easy to setup. cheap and reliable

my vote is biased since ive only tried the hack . but it gets a

eg6turbo

the afc is a great alternative to fmu and check valves...i dynoed my car and with the fmu and hack and the a/f was much smoother and power much linear...

DXturbo

okay im running a fmu and 255 holley intank fuel pump and missing link. now i wanna run 6 psi and its currently at 5psi.... will my fuel setup handle it or should i do the hack?

scttydb411

go the hack route with btm. the advanced timing in the low end will only help you.

i love the hack...smooth like factory turbo car.

pip9

Im running 310's/FMU/missing link/safc. Never had any experience with the hack, but my setup is working pretty well, no hesitation, bogging down etc...

eg6turbo

for stock injectors and 6-7 psi is fine with the fmu setup...and with my vafc hack and the btm...i dont have any bogging, hesitating or hard starts....just pulls hard to red line....it take a whiel to tune on the dyno to get all the points set correctly....also...most setup arnt linear like i thot...most people say this:

my old settings...
1k -40%
2k-4k -38%
4k-5k -37%
5k-7k -35%
7k-8k -33%

my tuned settings
1k -23%
2k-3k -38%
3k-4k -36%
4k-5.5k -31% (when vtec kicks in)
5.5k-6k -34%
6k-8k -32%

after all this it gave me about a 12.2 a/f raito flat thru the rpm band which was really nice....i made 180 whp when it was tuned and 202 whp untuned....and if u were wondeing why i lost 20whp....it was 33 degrees hotter when i was tuning it then when i wasnt tuned....67 degrees compared to 100...if i came back on a nice and cool day i wouldve made 200+...but i just wanted my **** tuned....afc hack works very well especially for a max boost of about 11...anything more u would want a hondata....as u can see my settings were way off and i was running very very very lean when vtec hit....dropping it to -31 from -37 made a huge power increase....ill have my dyno sheet scaned up in the near future

spooned out

so which would you all recommend? VAFC+310cc or FMU+missinglink+stock injectors?

sporty240

do you still need an aftermarket pump when you use the hack?

redteg87

I'll recommend the s-afc w/450cc route.

I'm swapping over this weekend from a FMU setup. The problem with the FMU is that it isn't very tunable. One disc will run you a little lean with detonation and the next disc will have you wayyy too rich. With the s-afc you can tune to very close specs.

Just my $.02 ...

TravSi

afc hack + dsm 450's + either btm or lower your base timing to like 15 dgrees so when it advances it doesnt advance it as far....and i would recommend a fuel pump also.....

Trav

steroidguy

The FMU isnt as bad as all you guys make it out to be. Running low boost like he plans on doing is fine with FMU and 310's....its the same thing i do on my GSR and it works perfectly. Running boost over 10 you should get the afc and larger injectors.

spooned out

what ratio FMU do you have? IF anything i thought that would be way too rich with 310's and fmu.

X2BOARD

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by steroidguy &raquo;</TD></TR><TR><TD CLASS="quote">The FMU isnt as bad as all you guys make it out to be. Running low boost like he plans on doing is fine with FMU and 310's....its the same thing i do on my GSR and it works perfectly. Running boost over 10 you should get the afc and larger injectors.
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I would only run under 7psi on the FMU setup (I have run an FMU setup before)... beyond that... I'd definitely go hack... but I don't plan to go over 7psi right now.

As far as disc ratio... Vortec recommends a 6:1 for 30-37lb injectors, which is the recal kit I'd get for 310's. (Plus a fuel pump, of course)

Let me pose this question: If both setups cost you the same $$, would you rather hack or FMU for the intended boost level ?

VTC_CiViC

If you do run the FMU, don't forget the inline pump or at the very least, a hi-pressure intank. Then there's the fact that you'll still want an AFC to fine tune it.. or you can just spend the same $$ and get the hack from the begining..

DXturbo

with all this said... i think i wanna go with the hack. does anyone know if the new saf-c will work? which would be better the VAFC or SAFC?

VTC_CiViC

Unless you're running a VTEC equipped engine, the SAFC will be you choice.

redteg87

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by steroidguy &raquo;</TD></TR><TR><TD CLASS="quote">The FMU isnt as bad as all you guys make it out to be. Running low boost like he plans on doing is fine with FMU and 310's....its the same thing i do on my GSR and it works perfectly. Running boost over 10 you should get the afc and larger injectors.
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I've run it. The problem is the lack of fine tunability. It is great for street/daily driving but sucks at the track where higher boost and greater tunability is a must.

Snail Tuning

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by RexSiT3 &raquo;</TD></TR><TR><TD CLASS="quote">afc hack + dsm 450's + either btm or lower your base timing
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what i did before. on my b16a only my timing was stock for about 2 months at 8psi. no problems at all. my new setup in a civic dsm450cc injectors, safc or vafc which ever i can find cheaper. no fuel pump needed. also u can retard your timing by using your dizzy. just get a timing light and rotate it towards your car.

X2BOARD

Ok, well I already HAVE the following:

*DSM 450 injectors/resistor box
*FMU

I will need for an FMU setup: 310's ($170-$250), Inline pump ($150-$200), Recal kit ($30)
FMU Totaling $350-$480

For an AFC setup... all I'd need is: Clean injectors ($100), VAFC($150-$230)

AFC Totaling $250-$330

Well guys... retarded base timing...btm...w/e I use... I think I'm sold on the hack in my situation. Thanks for the input thus far !

ek9vboi

should i be worried? i just got a drag gen 3 kit and it comes with a vortec fmu, they tell me i can use it wit stock injectors...it is true? ima be boostin about 5-6 for now...