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Old 07-29-2005, 05:28 AM   #1
OB2
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Default S_AFC VS 550 injectors

I know somme of you like, no-coast-punk or 8Complex, did have ride 15 to 22psi (on RS-T) of boost on street setup with S-AFC, ITC and big injectors like 550cc.

What kind of maping do you have? What do it look like? Do you need somethink more to run that??

I need INFO fast becose I have a set of 555cc STI pink on the table and I want to install it today and have a good maping to begin tuning with!

thank in advance for the info
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Old 07-29-2005, 08:47 PM   #2
no-coast-punk
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-50% all the way across on both high and low maps.
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Old 07-29-2005, 09:05 PM   #3
Absubtle
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SO basically you are maxing out the Apexi Super AFC and the rest is for the computer. What about the throttle settings HI/LO/ May only need to take out 10 points at idle, but you have to configure your Throttle setup, so it can adjust fuel control at idle at 0% throttle.
Perhaps, we need better feed-back than that.
But, besides-the-point, every car DOES differ. It may come close, but sometimes on forced induction, it's a bit too far.
The S-AFC will be able to control the extra fuel at idle and cruising, just by taking out points and driving the car. While driving, you are basically trying to drive like it did before these changes.
A wideband oxygen sensor setup w/ read-out, knock read-out, etc would be nice when tuning....and that is truly what you are doing.
The S-AFC has a limited threshold of fuel injector compensation. But should make it drivable w/ those injectors. I always play it safe w/ a piggy-back, especially w/ S-AFC's. Baro differances, air temp, boost pressure, you sneezed while under boost, it can change those settings.
Um, rambling on. I could go on. BUt I am not on the clock. But will help if asked.

Absubtle
PA
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Old 08-02-2005, 05:27 AM   #4
OB2
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nobody have more info to give me???

Please Help me
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Old 08-02-2005, 08:05 AM   #5
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I've written all there is to write about this topic. Do a search.

-50% across the board is all you need to know.
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Old 08-03-2005, 04:43 AM   #6
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Yes, what no-coast-punk said, but also realize your gas mileage is going to take a huge dive, and cold start up is going to suck, and overall drivability is probably going to suffer as well. S-AFC is teh suck when it comes to tuning out larger injectors. I felt my car ran significantly better with n/a 2.2 injectors and lower boost vs. legacy turbo injectors tuned out with an AFC and more boost. Just my opinion though.
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Old 08-03-2005, 08:14 PM   #7
no-coast-punk
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I got 30mpg cruising on the interstate and 22 around town on the RS with the SAFC and 555's.
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Old 08-15-2005, 12:11 AM   #8
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I dont understand why I have to put all my S-AFC at -50%??

I now run 420cc WRX injectors and the lower setup I have is -11%.

The 555cc are 33% biger than the 420cc so I only have to subtract 33% 0f 11% setup. So I will run -15% and no more 11%. And I have to do the same thing for all my NE points??!!

Is it logic or I am wromg???
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Old 08-15-2005, 08:17 AM   #9
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Here's my old setup running 10 psis:

S-AFC Settings:

SETTINGS:

1) HI:

1000 -2%
3000 -19%
3500 -24%
4000 -26%
4500 -28%
5000 -26%
6000 -22%
6500 -18%

2) LO:

1000 +10%
3000 -12%
3500 -14%
4000 -15%
4500 -16%
5000 -14%
6000 -12%
6500 -10%

3) TH POINT:

a) LO: 20%
b) HI: 55%

4) NE POINTS:

1000
3000
3500
4000
4500
5000
6000
6500

5) DEC. AIR:

a) THR: 2.0%
b) NE1: 7.0%
c) NE2: 2.0%

Each car setup will require a different fuel curve. Just in case here's also my old setup:

-GT-28 Ball Bearing turbo
-Spearco TMIC
-Greddy BOV (Type S)
-WRX injectors (420cc)
-Supra TT fuel pump
-Vortech FPR (10:1)
-Custom turbo manifold/uppipe/downpipe
-Custom 3" piping (catless)
-HKS exhaust/muffler
-Apexi ITC
-Apexi S-AFC
-Apexi AVC-R (w/8-10 psis)
-NGK Iridium spark plugs (BKR7Eix-11)
-Unorthodox Racing underdrive pulley



Hope it helps a bit....
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Old 08-15-2005, 11:12 PM   #10
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seriously though, calculations on percenting your fuel settings are nice, but there is no answer here unless you give us a wideband o2 to really determine this. It gets worst when you swap blocks, go figure...
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Old 08-16-2005, 01:17 AM   #11
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stats are nice too... but get an o2 seriously

+75% sized injectors: ~220c.c. to 360c.c. legacy turbo fuel set @ 40psi
TD04-18t 9psi
Walbro 255lph fuel pump
3" MRT Open Exhuast
2.0 turbo block
NGK-BKR7e011

SAFC
thr% 0.5
ne1% 0.8 1500rpm
ne2% 2.5 2500rpm

don't even worry about referencing other people's fuel curves...
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Old 08-16-2005, 02:19 AM   #12
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whoops, my post included a monkey and poop. But in good humor.

Last edited by reddevil; 08-16-2005 at 02:38 AM.
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Old 08-16-2005, 11:32 AM   #13
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at least it knows how to use the toilet, mine just throws it at me
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Old 03-22-2006, 02:32 PM   #14
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Thanks Mariano for your first email and the setup you give me there it realy help.

Did you have the 2th email I send you (more question)???
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