mods:
- Apexi AFC Neo
- home made single exhaust
- K&N drop in filter
- modify eBay intake snorkel

stock air/fuel was pig rich, it was dipping into the 10's on the top end. vtec xover is set at 5500, anything lower and it would loose power. air/fuel could be smoother at certain point but i have a wideband in my car, so i'll do some street tuning to smooth it out a little more. the highest gain is between 8k-9k, more than 20whp. you can see there's gain at just about every point on the graph.

i knew that the vafc would alter timing, so i used my friends OBD2 scanner to keep track of timing to make sure it doesn't advance too high. stock timing was around +21 deg on the top end. after AFC tuning it ended up around +24 deg.

next mods will be testpipe and maybe header, then back to the dyno to see if it made any gain.

AFC Neo settings.
1500/0; 2000/-3; 2500/-6; 3000/-9; 3500/-9; 4000/-12; 4500/-12; 5000/-13; 5500/-12; 6000/-6; 6500/-7; 7000/-9; 7500/-10; 8000/-16; 8500/-18; 9000/-19
-vtec crossover is 5700
-throttle point is low 40%: high 70%
didn't tune for low throttle point yet, which i'll be doing street tune.

hp and tq graph



tq vs. hp graph



tq vs. air/fuel graph






Modified by rice4life at 7:35 PM 7/10/2008

 

pretty decent numbers on a dynapack.

 

nice gains with a simple setup, especially for a little girl like yourself.

 

nice numbers... was this on a conservative tune?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Chris. &raquo;</TD></TR><TR><TD CLASS="quote">nice numbers... was this on a conservative tune?</TD></TR></TABLE>

not sure what you mean by conservative tune. you can see the target air/fuel ratio. as for timing, i can't actively change it although the vafc does passively change it.

 

Post your AFC settings! You have some sweet gains here from just that. I might actually have to hook my W/B up and install this VAFC I have sitting around. Are you data logging with the W/B, going off the dyno sniffer, or just going by eye?

On another note, I didn't know the OBD2 tool would tell you the timing in real time! This is just the standard OBD2 tool?

 

Every cars different so i wonldnt really run the same settings as the poster does. Hit the dyno and get it tuned correctly if your going to install it. When we tuned mine all we did was lean the settings from 7500 and up sine ap1's run rich up top. we also lowered my vtec to 5400 which smoothed out the dyno graph and picked up 6 hp.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by White Smoke &raquo;</TD></TR><TR><TD CLASS="quote">Post your AFC settings! You have some sweet gains here from just that. I might actually have to hook my W/B up and install this VAFC I have sitting around. Are you data logging with the W/B, going off the dyno sniffer, or just going by eye?

On another note, I didn't know the OBD2 tool would tell you the timing in real time! This is just the standard OBD2 tool?</TD></TR></TABLE>

i can post my settings tonight but it's not going to useful because it's different for every car even with the same mods. you'll have to tune on a dyno or at least street tune with a wideband.

i use dyno wideband when tuning on the dyno to be able to log air/fuel with dyno graph. i use my wideband for street tuning which i can log with a laptop if need to, but i usually just read it by eye.

the more expensive obd2 scanner (around $70) will show live data. you can find them on ebay.

 

I don't need to wast $$ on the dyno when I can't change the timing. Just setting up the fuel properly on the street will be plenty for me. I just wanted to see what settings this guy used to achieve these great results.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by rice4life &raquo;</TD></TR><TR><TD CLASS="quote">not sure what you mean by conservative tune. you can see the target air/fuel ratio. as for timing, i can't actively change it although the vafc does passively change it. </TD></TR></TABLE>

yea i meant as far as timing

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by rice4life &raquo;</TD></TR><TR><TD CLASS="quote">

i can post my settings tonight but it's not going to useful because it's different for every car even with the same mods. you'll have to tune on a dyno or at least street tune with a wideband.

i use dyno wideband when tuning on the dyno to be able to log air/fuel with dyno graph. i use my wideband for street tuning which i can log with a laptop if need to, but i usually just read it by eye.

the more expensive obd2 scanner (around $70) will show live data. you can find them on ebay.

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

It's good you are using a second W/B to ensure you are not going leaner then expected at any point. I never put 100% faith in the sniffer, or any one WB for that matter. In my civic I have the AEM in all the time and once every month or so I will install my innovate unit and make sure they are both on the same page. It's nice being able to log both at the same time with the AEM. I don't have the analog cable for the LM1 to be able to data log RPM's and what not.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by White Smoke &raquo;</TD></TR><TR><TD CLASS="quote">I don't need to wast $$ on the dyno when I can't change the timing. Just setting up the fuel properly on the street will be plenty for me. I just wanted to see what settings this guy used to achieve these great results.</TD></TR></TABLE>

spending money on a dyno is never a waste, unless you just want to show off your peak whp.

there are times where going leaner wont make any more hp, so it's safer to run richer and you won't be able to see this unless you're on a dyno. but street tune with a wideband is the second best thing.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by rice4life &raquo;</TD></TR><TR><TD CLASS="quote">there are times where going leaner wont make any more hp, so it's safer to run richer and you won't be able to see this unless you're on a dyno. but street tune with a wideband is the second best thing. </TD></TR></TABLE>


Yeah but not running pig rich is better on gas millage IMO putting my personal S2000 on the dyno is a waste bro. Different strokes for different folks I guess. If I am gonna pay for dyno time I am strapping my Civic or 240 back on. Car's I am looking for maximum power on. I don't really care how much power my S2000 makes. I don't care to squeeze every possible bit of power out of it. I want it to be very reliable, get great gas millage, and be quick at the same time. All while looking great and turning heads. I don't have the time or $$ to track this car much at this time so I am focusing on other projects. I have an AFC sitting at home that I don't use. Might as well put it to use if I can get a little performance or better gas millage from it. I dunno, just my opinion...

 

somone help me can i street tune with a vafc without a w/b?


Modified by Black S2K at 2:04 PM 7/10/2008

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Black S2K &raquo;</TD></TR><TR><TD CLASS="quote">somone help me can i street tune with a vafc without a w/b?
</TD></TR></TABLE>

Basically, no... What is it that you are trying to achieve? You could incorporate changes based on others settings (WB tuned). But this is risky as what works for one may not be so great for another. I'm sure you could find someone local to you who might be willing to let you borrow their WB. Where in PA are you?

 

how do you tune anything without knowing the a/f....wait till you get a w/b or able to hit the dyno

 

neer northeast philly in mongomery county. I got a Berk header so i have a extra bung for a w/b

 

Sorry, I am no where near you bro. Try the regional forums and see if someone is willing to loan you a WB. Or even better, see if someone is willing to help you street tune. If you wanna come down my way I would be more then happy to help you with it. If you wanted dyno time I am sure I could set that up with Joe @ Tempest for you as well.

 

^ thanx but i can get dyno time around here. Ill deff hit u up to help me street tune when i get evryhting hooked up. you think its worth putting in an ecu from a 03 into my 00 if im gona use a vafc?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Black S2K &raquo;</TD></TR><TR><TD CLASS="quote"> you think its worth putting in an ecu from a 03 into my 00 if im gona use a vafc?</TD></TR></TABLE>
I don't think you would benefit at all from doing that! If you are mostly stock and only working with the VAFC there is not really all that much you can do as far as adjustments go anyway.

 

cause i read somewhare that the 02-03 ecu has better midrage and doesnt run as rich as my 00. So i picked one up but havent programmed my key to it so its not in my car yet. But i was thinking if i get the vafc and w/b im gona be [freak]ing with the a/f so it wont really metter what ecu im working with right?

 

See, I didn't know that! I have an 02....Hummm
Some back to back testing would be sweet, too bad you are so far from me!

 

yea plus im not stock i got berk header tp and bcspecIII single brop in k&n plus snorkel and gutted box. search on s2gayi ull see alot of 00-01 owners switch to a 02-03 ecu

 

AFC settings are posted on the top now.