<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 91civicDXdude &raquo;</TD></TR><TR><TD CLASS="quote">what formulas are used to convert in/HG vacuum into mbar, and also how to convert your AFC percentage into the scaled numbers we see in pink?</TD></TR></TABLE>

I used the conversion found at http://xtronics.com/reference/convert.htm, or in the back of any physics textbook. As far as the numbers in pink... MAP sensor output is linear, and the AFC manipulation is linear... -40%, dude-a-rino.


<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by boostincoupe &raquo;</TD></TR><TR><TD CLASS="quote">So basically the AFC hack sucks? Sorry, I'm trying to dissect the info. and that's the main point I could gather. </TD></TR></TABLE>

Well, the large number of success stories tell you otherwise. Most AFC hack users run a little rich which masks the transitory ignition advance... just don't roll into boost from a low rpm/high gear where you spend a prolonged duration with ignition extremely advanced. That's what every AFC hack JRSC user does, and they can tell you about running super rich and still having tip in detonation.

All that said, I'm a big fan of the freeware ECU editors. It takes a little edjumucation, but you get a wonderful tool for less than half what new AFC costs.

Guys, I have no OBD2 experience beyond plugging in an OBD1 conversion harness and ECU, sorry. I wouldn't be surprised it it sets it's own base timing and you can't misadjust it, but i simply do not know.

As far as the pictures... looks like my hosting site redpepperracing.com is down. It should be back up within the day.

 

I promise you can do it with obd2.........

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by who00knows &raquo;</TD></TR><TR><TD CLASS="quote">I promise you can do it with obd2.........</TD></TR></TABLE>

you would know better than me b/c i have an obd1 car, if you say you can do it then i believe ya.

 

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

I used the conversion found at http://xtronics.com/reference/convert.htm, or in the back of any physics textbook. As far as the numbers in pink... MAP sensor output is linear, and the AFC manipulation is linear... -40%, dude-a-rino.


Well, the large number of success stories tell you otherwise. Most AFC hack users run a little rich which masks the transitory ignition advance... just don't roll into boost from a low rpm/high gear where you spend a prolonged duration with ignition extremely advanced. That's what every AFC hack JRSC user does, and they can tell you about running super rich and still having tip in detonation.

All that said, I'm a big fan of the freeware ECU editors. It takes a little edjumucation, but you get a wonderful tool for less than half what new AFC costs.

Guys, I have no OBD2 experience beyond plugging in an OBD1 conversion harness and ECU, sorry. I wouldn't be surprised it it sets it's own base timing and you can't misadjust it, but i simply do not know.

As far as the pictures... looks like my hosting site redpepperracing.com is down. It should be back up within the day.


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

Is that where the partial-throttle "buck" comes in? Or detonation?

 

very nice! pics wouldnt load for me though

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by who00knows &raquo;</TD></TR><TR><TD CLASS="quote">
Its a green plug by your ecu...might have a blue cover....you can use a paper clip if you dont have the honda jumper connector.</TD></TR></TABLE>

so this is on the ECU itself or near it? I'll take a look tonight - any chance it's near to the wiring harness plugs? My ECU's pretty buried behind the center console.

Any of you uberdata guys know of any base maps for the F23 motor using a P28 ECU? Does uberdata require a 2-wire IAC sensor? (hondata requires it, and the 6th gen accord has a 3-wire IAC)

thanks

 

Its on the right side of the car........Right by where the ECU mounts....

 

can we get the pics back please.....curious to look @ the graphs....thanks.

 

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

Is that where the partial-throttle "buck" comes in? Or detonation?</TD></TR></TABLE>

Great question, I would like to know too. Is the buck and detonation related or are they two separate things?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by LostCRX &raquo;</TD></TR><TR><TD CLASS="quote">just want to make sure, so are you saying that it would be better to retard the timing as the dizzy opposed to using a MSD BTM?</TD></TR></TABLE>
Here it is again just incase you missed it the first time. I cant tell if you are being sarcastic in your post or not.

 

I can't see the pics.... J. try using http://www.imageshack.us ... free host for anything 600k and under....

BTW.... I also would like to know... would running a BTM be not good then ? I can't tell w/o seeing the maps....

 

j-davis is a true stunna

good writeup. i always knew it was like this... just couldn't explain it really hehe

 

bump for good info.

 

I was joking about the MSD BTM, there is no point in one in this day and age when they don't do anything with the most popular engine management setups: AFC hack, Hondata, EMS, or a freeware tuner.

Looks like redpepperracing is back up... I appreciate the recommendation of a free hosting site, but Tom Lichti let me have the RPR gallery for free, and if you ever sift everything I have... it's extensive. Maybe ten or twelve imageshack accounts? http://www.repepperracing.com/gallery/syz BTW, if you ever need anything for a 1G CRX, or 3G Civic, http://www.redpepperracing.com has a killer little forum where you can do the Q & A bit..

 

So the best way to hack it is with full boost instead of 6 psi @ 7k with advance of 39 degrees?

Also i check out that bin you recomended on the hack thread, any ideas on where i should set the timing to work with a vfac hack on an obdo pr3?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by J. Davis &raquo;</TD></TR><TR><TD CLASS="quote">and if you ever sift everything I have... it's extensive. Maybe ten or twelve imageshack accounts? </TD></TR></TABLE>

Actually, no account req'd at imageshack.com.... only stipulation is the image must be 600k or less.... It's great for quick uploads.... for anyone else looking for a host...

 

isn't this problem inherent to the afc regardless if its using the hack or not?

lets say you have the afc hooked up like normal, using it to trim your bigger injectors, and because you are fooling the ecu to look at another part of the look up table for fuel, isn't this also happening in ignition table aswell?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SEFIxCivic &raquo;</TD></TR><TR><TD CLASS="quote">isn't this problem inherent to the afc regardless if its using the hack or not?

lets say you have the afc hooked up like normal, using it to trim your bigger injectors, and because you are fooling the ecu to look at another part of the look up table for fuel, isn't this also happening in ignition table aswell?</TD></TR></TABLE>

well i think that will happen regardless. as in it will affect both ignition and fuel maps. but by cutting it back that much (say -40%) it ends up being waaaaaay off interms of the maps. vs if u do like a -2% here or a +2% there. someone correct me if i'm wrong

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Mad Chemist &raquo;</TD></TR><TR><TD CLASS="quote">Also i check out that bin you recomended on the hack thread, any ideas on where i should set the timing to work with a vfac hack on an obdo pr3? </TD></TR></TABLE>

Those MAPhack .bins are stock programs with your ignition map recurved for the AFC hack. Keep timing at the distributor stock, and the tune your fuel as needed. The ignition map is tweaked so it retards under boost.

For those of you not following a discussion Mad Chemist and I had from another thread a couple days back, take a look at these sets of OBD0 ignition maps and look what I did before there were any freeware boost tuner applications. You are supposed to tune your fuel as per the traditional AFC hack procedure, but ther ignition tables have been altered so that instead of advancing ignition, your ignition is correct and it retards under boost. The original MAPhack ignition map, which is what is shown below, I did before there was a Ghettodyne... by hand, in hex. Old Skool, y0.

First, OBD0 LS ignition map:



MAPhack ignition map:



X2BOARD, thanks for the image shack clarification. Next time RPR is down, I'll throw the pics up so the thread isn't disturbed.


SEFIxCivic, you are correct about ignition altering along with the fuel with any AFC adjustment, but for minor changes the deflection is pretty insignificant. Most applications, it is harmless.

 

can obd2 auto ecu timing be messed with ?

 

Ok, so i am running a pr4 ecu in my car right now (91 dx hatch y8 swap) and i have it socketed for eproms. ive been wanting to jump on this turboedit or ghettodyne deal for a while, but i have no clue how to use it. i read your stuff and still ahve a hard time. i understand the ignition gets way too advanced using the hack at -40% right, bad deal. so, can i use the vafc to control my vtec and fuel and have say stock p28 fuel and ignition maps in my ecu, but have the ignition maps tinkered with to retard under the boost a little. would using the program in teh ecu keep the vafc from advancing the timing? or is that not possible when you use the vafc?

 

dont those maps seem still rather advaced? how did that bin work with the hack, where you able to emlinate detonation?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by who00knows &raquo;</TD></TR><TR><TD CLASS="quote">I promise you can do it with obd2.........</TD></TR></TABLE>
yup this guy is correct. You can change dizzy timing with obd2

 

J.Davis... how come you were able to alter timing with the obd0 bin and not fuel ?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Mad Chemist &raquo;</TD></TR><TR><TD CLASS="quote">So the best way to hack it is with full boost instead of 6 psi @ 7k with advance of 39 degrees?
</TD></TR></TABLE>