<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by BoostedITR41 &raquo;</TD></TR><TR><TD CLASS="quote">in response to Liam:

I am maxing the 255lph HP out. that is the idea. max it out with 450's and you can run massive boost. the afc hack is junk. I am runnin 15psi with a 12.1:1 af ratio to low 11:1 af ratio across the board. I think if inline pro runs that set up on street driven 11 second cars it is a good system. talk to jinxproof and autoEX they BOTH ran this system to the 11's </TD></TR></TABLE>

lol whatever dude. Your just dumping raw gas in the engine at that point. Sure it might go that fast, but as far as drivablity its crap.

Im sure 99% of anybody on honda-tech will agree with me.

liam

 

Liam 821... Hey man, I was wondering if you had a decent starting point for me... I have a ls motor with a greddy turbo looking to push 10-11 psi using the afc hack...I already have 440s, in tank pump and a wideband installed on my car.....I just made a post about this, but just in case u did not see it, I thought I would ask u now So any help regaurding low/high throttle settings and fuel% to take out would be greatly appriciated...Thanks

 

thanks a lot for everyone's post. Thanks liam, starting to not doubt the vafc. Now another question, i want to use the profec b but will i have to change the fuel settings each time i switch from high to low boost and vice versa??

 

the amount of boost the hack is able to handle you won't need a high low boost setting. just set low and leave it there.

Liam- the FMU set up by far is more driveable. off boost it is totally like a factory car. no bucking, no leaning, no triming injectors so much it won't idle. none of that ****. on top of that I am runnin 15psi what do you run? how much power has the hack maxed at? I know turbotyper made 436whp on the 440's and FMU just like my set up. if you want to go fast screw the hack and use the FMU with the 440's and get the inline pro head gasket and block gaurd and then have some fun

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by BoostedITR41 &raquo;</TD></TR><TR><TD CLASS="quote">the amount of boost the hack is able to handle you won't need a high low boost setting. just set low and leave it there.

Liam- the FMU set up by far is more driveable. off boost it is totally like a factory car. no bucking, no leaning, no triming injectors so much it won't idle. none of that ****. on top of that I am runnin 15psi what do you run? how much power has the hack maxed at? I know turbotyper made 436whp on the 440's and FMU just like my set up. if you want to go fast screw the hack and use the FMU with the 440's and get the inline pro head gasket and block gaurd and then have some fun</TD></TR></TABLE>

FMU

 

liam, you are a dumbass.

I've been over this a number of times.

When you understand that Honda maps are in MAP by RPM format for the range of ~300 mBar to ~1000 mBar, and then take those stock NA maps and stretch them via a MAP voltage cut to cover ~300 mBar to 1600+ mBar, well, **** has a strange way of getting fucked. Most people pick stuff like this up better visually, so try graphing it out on paper.... or look at Ghettodyne 2.2 NA versus Ghettodyne 2.2 Boost maps; envision the NA headings on the Boost column headings (that's what I did with Ghettodyne 1.01 for the PM6 MAPhack basemap - original PR4 MAPhack was all done by hand calculation with a hex editor).

You want real numbers? PGMFI.org is covered up with them... if you notice my link to the MAPhack thread on PGMFI, none of the people who know wtf is going on with speed density EFI contradicted me. I don't mean to shove that in your face in a rude manner (lol), but if you went all the way through this without forming a tenative grasp of the subject then you need to be given good reason to rethink your current stance.

Hell, JalopySiR made, what? 206 whp on 6 psi with his B20B turbo chipped with one of my MAPhack chips?

If you'd so much as looked at a set of stock timing maps you'd know that low RPMs are far from advanced... *sigh* Your ignorance and blatant unwillingness to educate yourself disgusts me. I advise everyone to go back and re-read the HT AFC hack thread started by liam - it's pretty apparent he was the first to post it to HT, not the first to come up with it.

 

I dont understand this debate...

Fuel is Fuel. The FMU setup draws more fuel to the injectors to accomodate boost pressure. Why is a VAFC-HACK different? Fuel still needs to be added to accomodate Boost Levels. So the same strain on the fuel pump and fuel lines is present in each setup right?

What about stock injectors plus 2 extra 440cc injectors that are controlled by a mf2 fuel controller that provide fuel up to 9 psi of boost + BTM? Is this any different? Which one is bad? WHich is good?

 

Kack, the difference in the FMU setup and the AFC hack is that when you run larger injectors you don't have to run as high of fuel pressure. The afc allows you to harness those larger injectors that might not otherwise run properly (hence the -40% settings for the hack, the injectors are large enough to handle some good fueling).

When you run the FMu setup you get into some REALLY high fuel pressures, which is not so good. The base pressure etc... is meitoned in the beginning of this thread. So with base and 12:1 multiplied fuel pressure you are getting to 5 TIMES THE STOCK FUEL PRESSURE!!!

So with the AFC hack and bigger injectors you don't run nearly as much fuel pressure, because the larger injector has more flow and relies less on more pressure to accomodate to higher fuel quantity needs.

-Daniel

 

afc whit 310cc inyector works? 9psi in d16y7

 

J davis- Could you put your dispute with liams theory in laymans terms please? I am trying to learn about Honda fuel managment. Are you saying there is a problem with the resolution of the fuel maps? Like if there were 6 maps from atmosphere down to the lowest vacume. Then you strech them out to include boost, maybe 3 for vac and 3 for boost. Is this the problem? Please explain

Adam

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by liam821 &raquo;</TD></TR><TR><TD CLASS="quote">

hehe thanks

As for the 3bar map sensor mod. Ive heard it can work but when your pushing your motor that hard, and maybe you just done care, but having a good fuel system becomes ever more important. Personally i feel anything past 10psi and you should really start thinking about good fuel management. Its too easy to blow something up with bad tuning..and 10psi+ its just that much worse.

liam</TD></TR></TABLE>

With this 3 bar sensor mod - How much boost do u think an H22A vtec could run using 450cc injector and the VAFC hack. How much boost can you run before the ecu starts to see boost? I know reliablity would be an issue but it would be good to know the true limits of the hack in theory. I would be using the MSD BTM.

 

Liam821 - If you can also answer this - What happens in theory when you try to run more than 11psi with the stock map sensor. Would it throw a CEL? Would the ECU still see 11psi and start to run lean? Let me know

Thanks.

 

No CEL. The ecu just stop sensing the increase in boost when the map sensors limit is reached-- so, yes, you would lean out horribly because as you shove more air into the motor, it wouldn't be aware of it. I guess the only way around it is to run super rich come that 11psi limit and allow the boost to lean it out to a respectable level, or maybe the 1:1 regulator (stock) helps too. In theory, it shouldn't work-- but then again, that 300hp d series that was done a while back was at like 16lbs on the hack..!

 

Will the 450cc injectors from a 4g63 work in the 4th gen prelude vtec?