My Ultimate SAFC guide

Discussion on Turbo electronics including Boost Controller, Turbo Timers, WideBands, etc

Is this thread usefull to you?

Yea
200
97%
No
6
3%
 
Total votes: 206

User avatar
frosti108
Knows Some Stuff About 240's!
Posts: 428
Joined: Fri Feb 23, 2007 1:28 am
Location: south east PA and NJ shore

Post by frosti108 »

im running a stock ka24e with the following
stock ka24e auto ecu
N60 maxima mafs blowthrough
440cc injects
AFC neo
fmic
T3 running 6-7 lbs boost right now (will soon be going up to 10 lbs)
JAW wideband reader


so right now im set at 4 in 5 out. i just put my wideband in tonight and got wide open throttle at every RPM at about 11-12 to 1. which is good. but just cruising and idling is all way way lean.

what am i supposed to do with my low throttle settings? right now i have high throttle settings all around +30-40 to acheive the 11-12:1 AFRs at WOT under boost. so now how do i richen up the mid throttle areas? it seems like the only time its below 20:1 is full throttle, yet i can turn the low throttle settings all the way up and no difference.


should i even be on 4 in 5 out? this is kind of confusing...


im running open DP right now, and the wideband o2 is probly about a few inches from the end. could the uber lean readings be from the sensor being so close to open air?
rb20 s13
User avatar
drifty240
Dont Question My Nissan Knowledge
Posts: 577
Joined: Fri Aug 13, 2004 2:15 pm
Contact:

Post by drifty240 »

frosti108 wrote:im running a stock ka24e with the following
stock ka24e auto ecu
N60 maxima mafs blowthrough
440cc injects
AFC neo
fmic
T3 running 6-7 lbs boost right now (will soon be going up to 10 lbs)
JAW wideband reader


so right now im set at 4 in 5 out. i just put my wideband in tonight and got wide open throttle at every RPM at about 11-12 to 1. which is good. but just cruising and idling is all way way lean. "Duh, your going to get a super lean reading if your 02 sensor is that close to open air source and especially at idle and under deceleration"

what am i supposed to do with my low throttle settings? right now i have high throttle settings all around +30-40 to acheive the 11-12:1 AFRs at WOT under boost. so now how do i richen up the mid throttle areas? it seems like the only time its below 20:1 is full throttle, yet i can turn the low throttle settings all the way up and no difference.

460 INJECTORS ON A STOCK KA24DE WITH A 255 FUEL PUMP, FUEL PRESSURE REGULATOR AT 30 PSI, T3T4 HYBRID WITH A 50 TRIM AT 10PSI

NE Point. ----High Tro----Lo Tro
800. -27%. -25%
1400. -30%. -20%
2000. -30%. -30%
2600. -30%. -30%
3000. -30%. -30%
3600. -33%. -35%
4000. -30%. -30%
4600. -25%. -30%
5000. -12%. -24%
5600. -10%. -20%
6000. -15%. -25%
6600. -15%. -25%


Do not exceed 10psi if you want to drive more than one day on a AFC.




should i even be on 4 in 5 out? this is kind of confusing...


im running open DP right now, and the wideband o2 is probly about a few inches from the end. could the uber lean readings be from the sensor being so close to open air?
User avatar
frosti108
Knows Some Stuff About 240's!
Posts: 428
Joined: Fri Feb 23, 2007 1:28 am
Location: south east PA and NJ shore

Post by frosti108 »

ah ok i suspected that was the prob but when your seeing 20 and 30 to 1 ratioes you get caught a little offgaurd... lol.

with those settings you posted, are they supposed to be positives or negatives? if theyre negatives like they show, i should be putting my low throttle up higher than my high throttle?


it kinda sucks when you can only read AFRs under full throttle...
rb20 s13
User avatar
frosti108
Knows Some Stuff About 240's!
Posts: 428
Joined: Fri Feb 23, 2007 1:28 am
Location: south east PA and NJ shore

Post by frosti108 »

right now at 6 psi, my high throttle is set at 50% the numbers are about

+25 @2.5K rpm
+35 @3.5K
+37@4.5k
+44@6K

so what should i do with my low throttle until i can get the rest of my exhaust on? low throttle pont is at 10% i think. i cant raed the wideband right now under partial throttle so i need help on about where how much to add for now


this is an AFC neo by the way
rb20 s13
Mamba
240sx Wannabe
Posts: 104
Joined: Wed Mar 28, 2007 9:10 am
Location: Ottawa, On, Canada

Post by Mamba »

hey guys ive been looking around and can't seem to find anyone who knows what setting to go with. let me know if you have some ideas; at least so that i can drive to the dynoshop.
my setup:
stock block(cam,rods,pistons..all stock)
370cc injectors
stock fpr
stock fuel pump(upgrading to walboro 255 and zr2 fuel filter)
safc I for tuning
lc-1 wideband
garrett t3/t4 (.60a/r compressor and .82 a/rexhaust)
custom topmount manifold and 2.5" piping all around.
please let me know if someone can tune for these specs. just looking for a safe tune and low boost (10psi)
thanks in advance
Mamba
240sx Wannabe
Posts: 104
Joined: Wed Mar 28, 2007 9:10 am
Location: Ottawa, On, Canada

Post by Mamba »

no one ? :cry:
smokey8611
Dont Question My Nissan Knowledge
Posts: 516
Joined: Fri Mar 18, 2005 4:55 pm
Location: WPAFB
Contact:

Post by smokey8611 »

hmm. ddint know this thread was still up. ANyways . is any of this info transferable to the afc neo? I just bought one and was wondering
Evo 8 turbo
Forced Fab Dump/Downpipe
enthalpy ecu tune
550cc injectors
14 Kouki conversion

WWW.FORCEDFAB.COM
Mamba
240sx Wannabe
Posts: 104
Joined: Wed Mar 28, 2007 9:10 am
Location: Ottawa, On, Canada

Post by Mamba »

anyone?
s14zenKAT
Dreams of owning a 240!
Posts: 85
Joined: Thu Mar 13, 2008 11:22 am
Location: Oxnard, CA

Post by s14zenKAT »

hey wassup guys.

i wrote down alot of stuff from this thread and learned alot.

my afc neo is hooked up already but i have no experience with tuning. i havent driven my car for over a week now and it sucks, because it dies after boosting a little not even half throttle =/

my setup is
unknown turbo manifold.
stock sr turbo elbow.
stock maf
sr 370cc injectors
sr t25
3" DP
stock sr recirc valve.

if anyone could throw out a tune they used for there car, i'd really appreciate it.

thanks!
User avatar
s-14
Dont Question My Nissan Knowledge
Posts: 506
Joined: Fri May 12, 2006 9:43 am
Location: Uranus

Post by s-14 »

thanks a lot this helps quite a bit, this stupid kid said he'd hook up my afc wires for 200 bucks :lol:
User avatar
MTX450
Knows Some Stuff About 240's!
Posts: 444
Joined: Mon Sep 17, 2007 12:52 pm
Location: New York

Post by MTX450 »

I'm helping my friend tune his car with his SAFC and I can't get the damn thing to idle right. I tried all the tips listed here and it stalls unless I keep the DECEL AIR settings off completely. I have the LO and HI maps setup correctly. It also has a large amount of hesitation/stumbling coming out of idle For example, if we are stopped and then start to go, when my foot is barely on the throttle is when it will buck, but then after that it's fine. The plugs also black as ****, which could be a contributing factor. I don't wanna put new plugs in until we fix the super rich problem.

Any ideas?
EFI Tuner
Haltech Engine Management Systems
User avatar
s-14
Dont Question My Nissan Knowledge
Posts: 506
Joined: Fri May 12, 2006 9:43 am
Location: Uranus

Post by s-14 »

IS THIS ACCURATE!? I Found Another Post for a KA ECU SAFC2 Wiring and it's almost completely different explain why that is so. Is This Write up confirmed correct? the search function just got retarded (debug mode) so i cant look up the other one at the moment plz let me know i want to get it in asap.

For example you say the power wire goes to pin4 while the other guy says it goes to pin56?!?! and all the other wires are in completely different pins according to you and him so i dont get it.... i've read all the post here, and there... no one says it's wrong everybody replied to you and the other guy saying good job etc. no one is saying its wrong ( unless no one is really paying attention ) so im getting confused as hell who has the correct writeup. The only thing about the other guy is that he has pics so it makes it easier... "IF" its correct!
User avatar
s-14
Dont Question My Nissan Knowledge
Posts: 506
Joined: Fri May 12, 2006 9:43 am
Location: Uranus

Post by s-14 »

After headache and research i've found out that this only works for sr20 or 91-94 ecu's doesnt work for 95 up 240sx nice write up though. Do the settings still work for 95 ka24det's?
jmac636
Knows Some Stuff About 240's!
Posts: 414
Joined: Wed Aug 13, 2008 11:10 am
Location: TEXAS

apexi safc 2 wiring for s14

Post by jmac636 »

Here's a link-http://www.apexi-usa.com/pdfWiring/15.pdf

If that doesn't help then go to (apexi-usa.com/support_wiring.asp) then click on safc wiring diagram support(401-A907) the usa version should come up S14 is the N-1 diagram. The S13 is in the world n3-b diagram on another page. I hope this helps those of you searching for the diagram.

jmac636
Knows Some Stuff About 240's!
Posts: 414
Joined: Wed Aug 13, 2008 11:10 am
Location: TEXAS

s14 wiring

Post by jmac636 »

Here's a link for ecu pinout for many different cars. This should help those of you who don't search.


http://www.plxdevices.com/ecudatabase.htm
Last edited by jmac636 on Wed Aug 20, 2008 7:03 am, edited 1 time in total.
jmac636
Knows Some Stuff About 240's!
Posts: 414
Joined: Wed Aug 13, 2008 11:10 am
Location: TEXAS

S14 wiring for safc

Post by jmac636 »

when comparing 1995 manual on 240edge.com to the ecm N-1 on apexi's site I came up with the wiring pin # location. Though I haven't compared other years, I probably should.

56-power
48-ground (brown wire closest to ecu then black 1cm from that)
47-airflow signal (maf)
23-throttle signal (tps)
3-tach (rpm)


Double check then check it again cause you don't want to blow your ecu or safc2, Good luck!
Mamba
240sx Wannabe
Posts: 104
Joined: Wed Mar 28, 2007 9:10 am
Location: Ottawa, On, Canada

Post by Mamba »

just curiouse but where the dec setting are, what is the throttle percent? do i just leave it as **** or should i have it at like 15% ?? and if my car stubles and almost stall at 0.2% on NE1 i move it up one? as in 0.3%? and then make my NE2 1.3%?? or 0.4%?
User avatar
LigouriRd.
Encyclopedia-Nissan
Posts: 1048
Joined: Tue Oct 19, 2004 6:08 am
Location: Edgerton Wi.

Post by LigouriRd. »

Go back to the first page and try the first instructions on setting decel air. The "MORE DEC AIR SETTING HELP" did not work for me.

Essentially the Decel Air NE01 and NE02 settings should be close to the airflow readings that you get when revving the engine up to the first and second NE points. The throttle percentage is the amount of throttle where the decel air setting "turns on". It could be a low value (1%) just over the tps reading for throttle closed.
"There is no such thing as too much boost. You could have too little rod, piston, sleeve, head gasket or timing. But never too much boost."

'91 Nissan 240SX
'96 Nissan 240SX KA-T
'05 Grand Cherokee (4x2)
'85 Honda Nighthawk 450SC
turbo2nr
Dont Question My Nissan Knowledge
Posts: 809
Joined: Thu Jan 06, 2005 10:59 am
Location: jamaica queens n.y.

Post by turbo2nr »

so is their anyway safc will be able to correct 600cc? on a ka?

my 550cc craped out and im getting a set of 600cc.

i mean it will idle but it will prob be rich right?
Image
R.i.p. 97 s14
96 s14 ka-t
User avatar
LigouriRd.
Encyclopedia-Nissan
Posts: 1048
Joined: Tue Oct 19, 2004 6:08 am
Location: Edgerton Wi.

Post by LigouriRd. »

In theory if you used a larger maf in addition to the larger injectors it would lower the amount of correction needed. So if you used a Z32 maf and 600cc injectors but kept the maf settings like the stock maf (5in/5out) then the amount of correction needed should be reduced. What correction to use I have no idea.
In theory mind u...I mean in theory rotarys work too right1?
"There is no such thing as too much boost. You could have too little rod, piston, sleeve, head gasket or timing. But never too much boost."

'91 Nissan 240SX
'96 Nissan 240SX KA-T
'05 Grand Cherokee (4x2)
'85 Honda Nighthawk 450SC
ImporT-ProphetZ
Driving Mom's Station Wagon
Posts: 31
Joined: Sun Jan 13, 2008 12:10 am

Post by ImporT-ProphetZ »

I love this write up.... I am going to try it this winter.
ImporT-ProphetZ
Driving Mom's Station Wagon
Posts: 31
Joined: Sun Jan 13, 2008 12:10 am

Post by ImporT-ProphetZ »

Sticky this please!!! :D
driftfiend
Dreams of owning a 240!
Posts: 51
Joined: Wed Apr 09, 2008 7:17 am
Location: jerzy

Post by driftfiend »

does the ecu pin work for the neo 2???
User avatar
S13_JDrift
240sx Wannabe
Posts: 130
Joined: Mon Jul 28, 2008 1:04 pm
Location: Florida

Post by S13_JDrift »

Hey Guys, I have been searching around every where for a SAFC 2 wiring Install for a KA24E and cant find anything.

Can anyone tell me where can i find a wiring diagram to install my SAFC 2 in my single cam.
Its a 89 single cam, I dont know if this matters but just in case.
THanks
turbo2nr
Dont Question My Nissan Knowledge
Posts: 809
Joined: Thu Jan 06, 2005 10:59 am
Location: jamaica queens n.y.

Post by turbo2nr »

called up apex-i today

for ka24de with z32 maf the in out settings are

2in:6out


that will be all

2=z32
5=sr20
6=ka24
Image
R.i.p. 97 s14
96 s14 ka-t
User avatar
LigouriRd.
Encyclopedia-Nissan
Posts: 1048
Joined: Tue Oct 19, 2004 6:08 am
Location: Edgerton Wi.

Post by LigouriRd. »

turbo2nr wrote:called up apex-i today

for ka24de with z32 maf the in out settings are

2in:6out


that will be all

2=z32
5=sr20
6=ka24
For a S14 with a z32 maf the 2 in 6 out setting did work, however I needed to adjust my correction from -18 (370cc injectors) to -30 to get the fuel ration back to where it was before I installed the Z32 maf. I don't know if that has happened to anyone else, but that has been my experience.
"There is no such thing as too much boost. You could have too little rod, piston, sleeve, head gasket or timing. But never too much boost."

'91 Nissan 240SX
'96 Nissan 240SX KA-T
'05 Grand Cherokee (4x2)
'85 Honda Nighthawk 450SC
driftfiend
Dreams of owning a 240!
Posts: 51
Joined: Wed Apr 09, 2008 7:17 am
Location: jerzy

Post by driftfiend »

what about the n60?what the in and out
crxracer98328
Driving Mom's Station Wagon
Posts: 24
Joined: Wed Nov 26, 2008 1:24 pm

Post by crxracer98328 »

can anyone help me with this set up.

stock injectors, t3/4 turbo, 255lph pump, n60 maf, fmic. i am only running 5.6lbs of boost. i dont want to run anymore boost until i get my new motor built.
User avatar
Kfred
Belongs To The TOP CONTRIBUTING MEMBERS!
Posts: 3513
Joined: Sun Oct 29, 2006 8:12 am
Location: Baton Rouge, LA

Post by Kfred »

crxracer98328 wrote:can anyone help me with this set up.

stock injectors, t3/4 turbo, 255lph pump, n60 maf, fmic. i am only running 5.6lbs of boost. i dont want to run anymore boost until i get my new motor built.
Get bigger injectors, you are probably pushing the stock injectors past their limit.
RIP Nate(480sx)...
crxracer98328
Driving Mom's Station Wagon
Posts: 24
Joined: Wed Nov 26, 2008 1:24 pm

Post by crxracer98328 »

its runs fine and doesnt lean out. its just a little lean at idle and lower rpms. so i was trying to see what other people put for there settings.
Post Reply