(I am not a tuner and not trying to pose, just curious!)

Hey Guys,

Recently made some changes to my 99 GSR. It has 100,800 miles on it
and it has a pretty strong engine for being stock. I had some parts
lying around so I figured I would throw 'em in. I noticed right away
some unfavorable results and I wanted to make a few adjustments.
Last night I decided to put in my VAFC thats been sitting in a drawer
for almost 2.5 years! (I can explain )

Based on previous experience I have seen that an OBD2 GSR tends to
run lean. This is usually pronounced when adding more camshaft with
the stock bolt ons. (when I put in CTR cams I remember the wide
map running from 15.2-14.4 from 3800-8000 on my previous
GSR when it was stock)

My motor right now has a BPI/6"k/n, stock header, skunk stage 1 cams
and full stock GSR exhaust. All else currently stock.

Cams are at 0,0 and base timing at 17btdc.

I noticed there was a hole when vtec engaged at 4400 up to about
when the IAB opened at 5800. The top end also felt flat. I figured I
would do a few things and see where it got me:

1.) I raised vtec to 5200 and unmount at 4900

2.) Then I created the Ne points. I took out 4% at idle tapering that off
to 0% by 4500rpm on narrow throttle, adding 1% to 3% by 7000rpm.



3.) On wide throttle, I started at 0% at 4000 and by 5000 have +6% by
7000 I have +9% and at 7600 I have 11%.



It is a different car, much smoother and much more drivable I
do intend to sit it on a dyno and get an A/F readout this weekend.

My question is what if any risks would there be in running a 'richer' table?
I know its not ideal to make adjustments to the AFC portion unless you have
a wideband. Since I am not taking away fuel, I felt like before I keep these
settings I would run it across a few minds here.

Any thoughts?

Thanks in advance,

Mike

 

I calmed the settings down until I can hit a dyno and get with a pro.
Just wanted to throw this out there

 

I would say that your biggest "risk", so to speak, is going to be less fuel economy. Sure, if you really dump the fuel in there it will bog and be less productive, but I don't see that happening.

At least you are not at as great of a risk for ping and detonation.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SuzukaBlueAP2 &raquo;</TD></TR><TR><TD CLASS="quote">I would say that your biggest "risk", so to speak, is going to be less fuel economy. Sure, if you really dump the fuel in there it will bog and be less productive, but I don't see that happening.

At least you are not at as great of a risk for ping and detonation.

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


well first of all you need to understand your running a piggie back system and eventually your obb2 comp will learn and cancel out this piggie system

if i were you i would get rid of that band aid and get your self a p28 or what ever ecu and get it chipped and tuned if you really must have this vafc then just hook it up for monitoring not for adjustments

as for running a rich map


<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SuzukaBlueAP2 &raquo;</TD></TR><TR><TD CLASS="quote">I would say that your biggest "risk", so to speak, is going to be less fuel economy. Sure, if you really dump the fuel in there it will bog and be less productive, but I don't see that happening.

At least you are not at as great of a risk for ping and detonation.

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

also lets not forget the extra carbon build up lol and all of the above

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SuzukaBlueAP2 &raquo;</TD></TR><TR><TD CLASS="quote">I would say that your biggest "risk", so to speak, is going to be less fuel economy.
</TD></TR></TABLE>

hold on change that less fuel economy to running a vafc.

 

I still have it in and learning the interface. I have an 94 OBD1 P72 already with the harness for my car. I just haven't had it prepped for hondata/crome or whatever method I will eventually go with. It seems to be helping for the drivability. I cooled the settings back, took a bit of fuel out on the narrow map up to about 5100. The wide map I have scaled it down to:

Wide/Hi
5100: 0%
5300: 1%
5500: 1%
5800: 2%
6200: 3%
6800: 3%
7200: 4%
7800: 5%

Narr/Low
1000: -5
1300: -4
2000: -3
2600: -3
3400: -3
4500: -2
4800: -1
5100: -1

lighting vtec at 51-5300 has made a big difference with these 255/11.8cams.
I set the throttle point that seemed appropriate for my driving also seemed to
help me conserve. when testing the richer settings I managed to drain my
tank! haha... I usually get about 120 miles out of my first half tank.

I have 17s and ITR/B16 3,4,5th and a lightened flywheel so my mpg hasnt
been great. Also I bet I need new valveseals by now as well

I managed to get 68 miles out of the first 40% of the tank and on the last
10% or so I got up to 100 mi. I noticed my heavy foot needed adjustment
for

Anyhow, just some thoughts. Thanks for your comments