WAFFLES

I've got one on the way. I know it's not going to give me the same tuning capabilities as the Hondata. I simply got this as part of a trade I worked, and I was wanting to play around with it a bit. So please, spare me the "get Hondata" replies...cause I'm just looking to play around with it for a bit then sell it.

Ok here are my questions:
1) It has the ability to add/subtract fuel like the VAFC. Now we all know the VAFC tends to only be able to subtract fuel, and it really sucks at adding it. Does the Field's unit suffer from the same problem?
2) I have heard these Fields units tend to "crap-out" over time. Is there any truth to this? If so, what goes wrong? No longer able to adjust fuel, or not able to adjust VTEC or both?

Anyways, to those of you that have used this and have any experience with it on the dyno, let me know. How well does actually tune?

Thanks
Blake

Black Sheep

Blake, I'm pretty sure the Apexi can do more than the Fields, as for sucking when adding fuel I can't confirm this, bigger injectors maybe?

try running a search, I'm sure you'll find lots of stuff about this.

WAFFLES

I tried searching, and all I could find were FS posts, lol. I hope that doesn't mean anything.

I'll keep searching.

WAFFLES

I will answer my own questions for anyone who is trying to keep up with this. I found some more stuff while searching.

I havent heard anything regaurding the units ability to add/subrtact fuel.

THe crapping out tends to happen from weather(extreme hot or cold) and from a bumpy ride. The unit sometimes throws codes(mainly for map sensor).

I'll give this a try, and if I have any problems with it I will just sell it.

Anyone elses imput is appreciated.

ITR#132

1. Same as the VAFC, Cant really add much.
2. Gives Map codes, Wont hold idle, Stuttering, bogging.

Grandprix

so it sounds like a FPR should be used to raise the pressure, and then the preferred electrical device should be used to lower fuel at certain rpm

Qwikrex

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Grandprix &raquo;</TD></TR><TR><TD CLASS="quote">so it sounds like a FPR should be used to raise the pressure, and then the preferred electrical device should be used to lower fuel at certain rpm</TD></TR></TABLE>

Thats what I did on my setup, It seems to be working out fine.

WAFFLES

Sweet. I already have a B&M adjustable FPR and gauge installed. I'm also running the Mugen program on a p28. So should this work pretty well?

sgT

i have had mine for 6 years now and it still works.

i have never had problems with field units, whereas i have problems with about 3/5
vafcs. also one feature that the sfc has that the afc does not is a map voltage
limiter. being designed specifically with hondas in mind, they know that map
voltage should not exceed 2.8V and doesnt allow you to exceed that, and hence
throw a CEL for the map sensor.

WAFFLES

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by sgT &raquo;</TD></TR><TR><TD CLASS="quote">i have had mine for 6 years now and it still works.

i have never had problems with field units, whereas i have problems with about 3/5
vafcs. also one feature that the sfc has that the afc does not is a map voltage
limiter. being designed specifically with hondas in mind, they know that map
voltage should not exceed 2.8V and doesnt allow you to exceed that, and hence
throw a CEL for the map sensor.</TD></TR></TABLE>

Cool. Have you been able to add fuel with it? I don't think my particular setup will need more fuel, but I was just curious.

Padawan

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by WAFFLES &raquo;</TD></TR><TR><TD CLASS="quote">Cool. Have you been able to add fuel with it? I don't think my particular setup will need more fuel, but I was just curious.</TD></TR></TABLE>

The SFC and VAFC add/subtract fuel by intercepting and modifying the MAP signal. The computer uses the MAP signal to determine how much air is entering the engine, and then introduces a specific amount of fuel depending on the airflow.

To "add" fuel, the SFC and VAFC intercept the MAP signal and send a new signal that simulates what the MAP would send if there was a greater amount of air entering the engine. The computer is fooled by this signal into thinking that the engine is taking in more air, and thus adds more fuel to compensate. Of course, since the airflow is not actually increasing, the mixture is richened.

This leads to the problem with "adding" fuel. The concept works basically fine as long as there is room to manipulate the MAP signal. In other words, once the MAP is sending it's "max" airflow voltage, the SFC and VAFC can no longer artificially add to the signal. In these instances, the most common solution is to use an adjustable FPR to increase fuel pressure across the board, and then use the SFC or VAFC to reduce the MAP signal (and thus subtract fuel) at the necessary points.

Since both units operate similarly in that the alter the stock MAP signal to "fool" the ECU, both should have similar/identical functional limits in terms of their ability to "add" fuel at a particular point.

1.8T_EG

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by sgT &raquo;</TD></TR><TR><TD CLASS="quote">also one feature that the sfc has that the afc does not is a map voltage limiter. being designed specifically with hondas in mind, they know that map voltage should not exceed 2.8V and doesnt allow you to exceed that, and hence throw a CEL for the map sensor.</TD></TR></TABLE>

... sounds like the map voltage limiter could be useful for vafc hackers... anyways, i was wondering what the +/- limit is for the fields sfc... i know that the apexi vafc is +/- 50%... so what is the sfc?... i have read 30%, but i just wanna confirm... thanks...

WAFFLES

30%

wreckyou

Anyone actually use the SFC now? my buddy bought a used one and we wired it into his '00 Civic Si. Kind of a MF beotch, really. We had to cross-reference a few manuals and online resources for ECU pinouts, etc. because all the directions we could find (that were actually in english) were for wiring it into a EG civic ECU. But we got it, if anyone needs install directions, email me since im a trial user 4 now.

SFC Manual==&gt; http://asia.vtec.net/beystock/....html

JjuuN R

i've been using the Field unit for a few years now and haven't had a single problem with it. right now i just have it installed basically for the digital RPM read out as i don't want to mess with the JUN ecu settings of course.

1: very very easy to use
2: it's a lot smaller then the Apex-i unit, fits in better viewable places
3: it looks 10x better then the bulky Apex-i unit
4: has amber digital read out to match the rest of your dash board lighting

migs

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by wreckyou &raquo;</TD></TR><TR><TD CLASS="quote">Anyone actually use the SFC now? my buddy bought a used one and we wired it into his '00 Civic Si. Kind of a MF beotch, really. We had to cross-reference a few manuals and online resources for ECU pinouts, etc. because all the directions we could find (that were actually in english) were for wiring it into a EG civic ECU. But we got it, if anyone needs install directions, email me since im a trial user 4 now.

SFC Manual==&gt; http://asia.vtec.net/beystock/....html</TD></TR></TABLE>

Wow, new member, brought back up an old thread as his first post. That rocks! (not that Im a search ****)