My Ultimate SAFC guide
- Covertpolarbear
- Knows Some Stuff About 240's!
- Posts: 346
- Joined: Sat Nov 20, 2004 6:55 pm
- Location: Houston TX
My Ultimate SAFC guide
Well, ive been searching forever on starting out settings for a SAFC-II, with wiring to the ECU, and everything.. so heres what ive compiled from multiple boards, all from turbo'ed / modified KA's and KA-t's
Enjoy
-
Chuck
===============================================
DEC AIR SETTINGS
""when the car is completely cool start it up. have the safc mointoring throttle %, air flow, and rpms. have the engine at 1000rpms and write down the air flow. then have the engine at 2000rpms and write down the throttle % and air flow.
now go to the dec. air settings. the THR setting is the throttle % you documented at 2000rpms. the NE1 setting is the air flow you had at 1000rpms. the NE2 setting is the air flow you had at 2000rpms. this will get you very close to the settings you need. may not be perfect but very close. this will allow you to run an atmospheric bov without stumbling between gears""
=====================================================================
AIR FUEL RATIO HELP
14.5:1 is insanely lean on a boosted motor. You need to be around high 11's to low 12's if your under 12-15 psi. Anyone who tells you to tune your car to 14.5:1 is an idiot...maybe if it was NA
Rick
=====================================================================
TUNING SUGGESTIONS FOR 370cc injectors with a stock MAF
For both high and low throttle at each rpm point adjust the setting to ~-27% and thats it.
As for the decel air, just leave it alone for now you will need that only if you have an open atmosphere blow off valve...or a crappy recirc that doesn't open till 5 psi or so. Anyway the Th should be **** or 0%.
I didn't see a knock setting in the SAFC manual (http://www.apexi-usa.com/pdfInstallation/18.pdf) so it might not have one.
=====================================================================
INJECTOR SIZING EQUATION MADE BY ME, COVERTPOLARBEAR
To determine the flow correction injector percentage,
(OEM injectors/new injectors=X ::: 1-X=Y :: move decimal 2 over, and thats your percent.)
(270/370=.73 ::: 1-.73=.27 ::: 27%)
(270/440=.61 ::: 1-.61=.39 ::: 39%)
(270/500=.54 ::: 1-.54=.45 ::: 45%)
(270/550=.49 ::: 1-.49=.51 ::: 51%)
Engine fuel pressure at stock is 34 psi with vaccum hose connected
Engine fuel pressure at stock is 43 psi with vaccum hose disconnceted.
=====================================================================
MORE DEC AIR SETTING HELP
Hotwire air flow meter equipped engines do some funky stuff when you put open air blow off valves on them. The Decel Air function of the SAFC/SAFCII allows you to correct this. Once you have it set right, the car should stop backfiring or stalling on deceleration.
Start when the car is cold. (after an overnight rest is the best way, but at least several hours without running)
Turn key on, go to decel air settings.
Set throttle to 1%.
Set NE1 to about 4.
Set NE2 to about 5.
Start car.
Adjust NE1 until you get a smooth idle while the engine is still cold. Now start turning it down as low as possible while still maintaining a good idle.
If the car starts sputtering and getting rough, you just went too low. Turn it back up very slowly until it smooths out. You want to leave NE1 on the lowest possible point with a good idle.
Now set NE2 to be about 1 higher than NE1.
This formula should eliminate any stalling or popping from the BOV being open.
Theory: Throttle setting tells the SAFC whenever the pedal is depressed less than 1%, the SAFC should control fuel and ignore everything else (including the MAF)
NE1 is the first RPM point you have selected in your NE Point settings. I put mine at 1000 rpm. I set NE2 at 3000, then NE3 at 4000, and so on in 1000 increments. Setting NE1 down at 1000 gives you the ability to control fuel at idle really well. Besides, you probably don't need to adjust anything between 1000 and 3000. (turbo spools after that, right?)
Setting the air flow percentage at NE1 is basically telling the SAFC a number to use whenever it reaches that RPM and less than the throttle setting. So, as the throttle is let off, the SAFC looks at the NE1 and NE2 points. As RPM rolls back, there is going to be a reduction in air into the engine, yet the MAF has already seen it. The stock ECU is attempting to send the fuel for that air that is now missing... hence your stalling and backfiring. The SAFC catches that signal, ignores it, then tells the ECU exactly how much air flow you have according to your DEC AIR settings at those RPM points. Get it?
RPM comes down, hits NE2, SAFC sees 10%. It tells the ECU it needs 5%. (because you picked that number.) Now the RPM won't dive so hard like it was. It reaches NE1, SAFC sees 6%, you told it 4% and it tells the computer only 4%. The idle sets steadily down to where its supposed to and everybody is happy.
The SAFC is all about tricking the ECU into doing what you want it to.
=====================================================================
ECU PINOUT HELP
SAFC-II Wiring Diagram for S13 KA24DET
SAFC-II Wire Color - ECU Pin # - ECU Wire Color - Function
White wire - ECU pin 16 - white wire - MAF Signal Input from MAF (You actually cut the ECU's wire in half)
Yellow wire - ECU pin 16 - white wire - MAF Signal Output to ECU*
Grey wire - pin 20 - white wire - TPS
Purple wire - pin 27 - white wire - Knock Sensor
Green wire - pin 2 - yellow/red wire - Tach Signal
Red wire - pin 4 - black/white wire - Power
Black wire - pin 39 - black wire - Ground (Further from ECU 1cm from brown SAFC wire)
Brown wire - pin 39 - black wire - Ground (closer to ECU 1cm from black SAFC wire)
=====================================================================
HERE ARE SOME SETTINGS THAT MULTIPLE MEMBERS HAVE MADE ON THERE SAFC POWERED RIDES
NE Points: 1000rpm, 2500rpm, 3000rpm, 3500rpm, 4000rpm, 4500rpm, 5000rpm and 6000rpm
Throttle Point: Lo - 10% / High - 43%
Low Throttle Fuel Correction: -25% across ALL NE Points
High Throttle Fuel Correction: 1000rpm -17%, 2500rpm -17%, 3000 -16%, 3500rpm -15%, 4000rpm -15%, 4500rpm -15%, 5000rpm -15% and 6000rpm -15%
My turbo system is, SSAutochrome Manifold, SR T25 Turbo, SR Turbo Extension, Megan Racing 3" Downpipe, SR 370cc Injector's, Megan Racing Fuel Pressure Regulator, 300zx Fuel Filter, SR SMIC, Walboro Fuel Pump, GReddy Type S BOV (atmospheric) and the SAFC (buttons)
-------------------------------------------------------------------------
With my setup I am using a t28 .60a/r comp and .86a/r turbine, 255lph pump, 555cc injectors. Afr's are constantly watched with a plx m-300 wideband.
Lo map is -50% across the board, which gives me 14.5-15.5 afr's while cruising around town.
High map is -50% from 1000-2200rpm's, -45% at 2800rpm's and -35% 3400-7000rpm's which gives me afr's of 12.5 during spool and 10.8 to 11.5 during full boost, which is at about 10.5psi.
NE points are 1000,1600,2200,2800,3400,4000,4600,5200,5800,6400,7000, and 7600rpms
Dec settings are 1.1,1.4, and 2.0. I have no stalling problems at all.
Throttle point is 10% and 33%
All These settings are working really good for me, I have excellent streetability and it pulls like hell at WOT. However, i'm not to certain about the NE points, I have not touched them
-------------------------------------------------------------------------
I didnt not set the DECEL SETTINGs becoz it seems fine to me. is in factory default..
and my
Throttle point is: Lo 44%, Hi 45%
NE POINTS: 1000, 1600, 2200, 3400, 4000, 5000, 6000, 7000
LO : 25%, 25%, 25% , 26% , 26% , 27% , 27%, 28%
HI : 31%, 31%, 31% , 32% , 32% , 33% , 33%, 33%
everything runs fin my A/F readings are 14-14.7 when cruising but chokes when boosting.
-------------------------------------------------------------------------
-27% across the board means that for each throttle point on both HI and LO settings, set it to -27 to make it basically equivalent to what the 270s put out for fuel, but you'll be using 370cc's so you need to pull -27% counteract the size change.
This is the setup I got from a fellow BillKlineVT
under etc. menu)
Sens. Type: Hotwire
Car type: 4 cyl, arrow up and to the right "/"
do knock set just like the manual says to do
(under settings)
Th-Point: Lo 15% Hi 50%
RPM: Hi-Thrtl: Lo-Thrtl:
800 -20% -20%
2000 -20% -20%
2600 -20 -20
3200 -25 -22
3800 -24 -22
4400 -21 -16
5000 -27 -15
5200 -26 -15
5400 -26 -15
5600 -26 -15
5800 -25 -15
6400 -23 -15
Ne Points: 800,2000,2600,3200,3800,4400,5000,5200,5400,5600,5800,6400
-------------------------------------------------------------------------
stock ecu/550cc injectors/walbro/z32maf/stock FPR
ETC Menu:
Sensor type: Hot-wire: 1in 6out: 2in ADDout
Car Select: 4 cyl thr -> (arrow pointing up)
Initialize (this is the menu you use to reset the safc)
Setting Menu:
Low Throttle:
1k -50%
2-8k -40%
Hi throttle (low boost 15psi):
1-3k 0%
4k -24%
5k -30%
6-8k -31%
High Throttle (high boost 19psi)
1-3k 0%
4k -33%
5k -41%
6-8k -32%
THR Point:
20% low 40% high
Dec. Air:
Thr 2.0%
Ne1 .7%
Ne2 2.0%
-------------------------------------------------------------------------
z32 MAF
370cc injectors
walbro 255lph fuel pump
91 ka24de ecu
apexi SAFC
apexi AVC-R
apexi turbo timer
MSD 6BTM
MSD blaster coil
Split second EGO signal conditioner
ssautochrome bottom mount manifold
Garrett T25 from a red top sr20det
hks style turbo outlet
hks SSQV BOV
3 in SR downpipe, 3 in SR resonator test pipe, 3 in s13 catback exhaust
21x9x3 FMIC
2 1/2" piping
airinx type air cleaner
MAF type = Hotwire
Setting = 2in and 5out
# Of cylinder and throttle signal type, 4 and up arrow to the right
boost on average @ 7 to 8 psi with an occasional spike up to 11 psi.
lo throttle point 20%
hi throttle point 40% (fast spooling turbo)
low map -24 across
high map +20 to 21 across
on the innovate wideband, AF is steady at low 12 to mid 11 and high 10.
-------------------------------------------------------------------------
t3 @10psi
370cc injectors
stock ka maf
vpsl fmic
Throttle Point
lo - 10%
hi - 75%
Dec. Air
THR 15%
NE1 20%
NE2 16%
mess around with these and your NEPOINT settings to get the car to drop rpms correctly
Fuel Correction Maps:
Lo Throttle
RPM | COR
____________________
1000 | -35%
2000 | -13%
3000 | -7%
4000 | -4%
5000 | -1%
6000 | 0%
7000 | 0%
HI Throttle
RPM | COR
____________________
1000 | 0%
2000 | 0%
3000 | -3%
4000 | +5%
5000 | +13%
6000 | +17%
7000 | +14%
runs a bit on the rich side but it works good
-------------------------------------------------------------------------
right now I have it at -50 up to 2000 and the hi throttle to -38 accross the board, just to play it safe. by the way the rest of my setup is:
KKK K26 turbo
38MM wastegat
Walbro
Z32 MAF - Blow through
SAFC2
550cc injectors
People on the boards were telling me that the k26 was to small and not worth the time. I had the MAF maxed out @ only 7 psi. What HP level does the MAF max out at anyway. The k26 runs fine @ 12psi without dropping off so we'll see how high it can boost without falling off once I get the Wideband.
===============================================
I hope this helps more than just me.. but if not, oh well, at least someone may get some sort of info out of this..
thanks
Chuck
Enjoy
-
Chuck
===============================================
DEC AIR SETTINGS
""when the car is completely cool start it up. have the safc mointoring throttle %, air flow, and rpms. have the engine at 1000rpms and write down the air flow. then have the engine at 2000rpms and write down the throttle % and air flow.
now go to the dec. air settings. the THR setting is the throttle % you documented at 2000rpms. the NE1 setting is the air flow you had at 1000rpms. the NE2 setting is the air flow you had at 2000rpms. this will get you very close to the settings you need. may not be perfect but very close. this will allow you to run an atmospheric bov without stumbling between gears""
=====================================================================
AIR FUEL RATIO HELP
14.5:1 is insanely lean on a boosted motor. You need to be around high 11's to low 12's if your under 12-15 psi. Anyone who tells you to tune your car to 14.5:1 is an idiot...maybe if it was NA
Rick
=====================================================================
TUNING SUGGESTIONS FOR 370cc injectors with a stock MAF
For both high and low throttle at each rpm point adjust the setting to ~-27% and thats it.
As for the decel air, just leave it alone for now you will need that only if you have an open atmosphere blow off valve...or a crappy recirc that doesn't open till 5 psi or so. Anyway the Th should be **** or 0%.
I didn't see a knock setting in the SAFC manual (http://www.apexi-usa.com/pdfInstallation/18.pdf) so it might not have one.
=====================================================================
INJECTOR SIZING EQUATION MADE BY ME, COVERTPOLARBEAR
To determine the flow correction injector percentage,
(OEM injectors/new injectors=X ::: 1-X=Y :: move decimal 2 over, and thats your percent.)
(270/370=.73 ::: 1-.73=.27 ::: 27%)
(270/440=.61 ::: 1-.61=.39 ::: 39%)
(270/500=.54 ::: 1-.54=.45 ::: 45%)
(270/550=.49 ::: 1-.49=.51 ::: 51%)
Engine fuel pressure at stock is 34 psi with vaccum hose connected
Engine fuel pressure at stock is 43 psi with vaccum hose disconnceted.
=====================================================================
MORE DEC AIR SETTING HELP
Hotwire air flow meter equipped engines do some funky stuff when you put open air blow off valves on them. The Decel Air function of the SAFC/SAFCII allows you to correct this. Once you have it set right, the car should stop backfiring or stalling on deceleration.
Start when the car is cold. (after an overnight rest is the best way, but at least several hours without running)
Turn key on, go to decel air settings.
Set throttle to 1%.
Set NE1 to about 4.
Set NE2 to about 5.
Start car.
Adjust NE1 until you get a smooth idle while the engine is still cold. Now start turning it down as low as possible while still maintaining a good idle.
If the car starts sputtering and getting rough, you just went too low. Turn it back up very slowly until it smooths out. You want to leave NE1 on the lowest possible point with a good idle.
Now set NE2 to be about 1 higher than NE1.
This formula should eliminate any stalling or popping from the BOV being open.
Theory: Throttle setting tells the SAFC whenever the pedal is depressed less than 1%, the SAFC should control fuel and ignore everything else (including the MAF)
NE1 is the first RPM point you have selected in your NE Point settings. I put mine at 1000 rpm. I set NE2 at 3000, then NE3 at 4000, and so on in 1000 increments. Setting NE1 down at 1000 gives you the ability to control fuel at idle really well. Besides, you probably don't need to adjust anything between 1000 and 3000. (turbo spools after that, right?)
Setting the air flow percentage at NE1 is basically telling the SAFC a number to use whenever it reaches that RPM and less than the throttle setting. So, as the throttle is let off, the SAFC looks at the NE1 and NE2 points. As RPM rolls back, there is going to be a reduction in air into the engine, yet the MAF has already seen it. The stock ECU is attempting to send the fuel for that air that is now missing... hence your stalling and backfiring. The SAFC catches that signal, ignores it, then tells the ECU exactly how much air flow you have according to your DEC AIR settings at those RPM points. Get it?
RPM comes down, hits NE2, SAFC sees 10%. It tells the ECU it needs 5%. (because you picked that number.) Now the RPM won't dive so hard like it was. It reaches NE1, SAFC sees 6%, you told it 4% and it tells the computer only 4%. The idle sets steadily down to where its supposed to and everybody is happy.
The SAFC is all about tricking the ECU into doing what you want it to.
=====================================================================
ECU PINOUT HELP
SAFC-II Wiring Diagram for S13 KA24DET
SAFC-II Wire Color - ECU Pin # - ECU Wire Color - Function
White wire - ECU pin 16 - white wire - MAF Signal Input from MAF (You actually cut the ECU's wire in half)
Yellow wire - ECU pin 16 - white wire - MAF Signal Output to ECU*
Grey wire - pin 20 - white wire - TPS
Purple wire - pin 27 - white wire - Knock Sensor
Green wire - pin 2 - yellow/red wire - Tach Signal
Red wire - pin 4 - black/white wire - Power
Black wire - pin 39 - black wire - Ground (Further from ECU 1cm from brown SAFC wire)
Brown wire - pin 39 - black wire - Ground (closer to ECU 1cm from black SAFC wire)
=====================================================================
HERE ARE SOME SETTINGS THAT MULTIPLE MEMBERS HAVE MADE ON THERE SAFC POWERED RIDES
NE Points: 1000rpm, 2500rpm, 3000rpm, 3500rpm, 4000rpm, 4500rpm, 5000rpm and 6000rpm
Throttle Point: Lo - 10% / High - 43%
Low Throttle Fuel Correction: -25% across ALL NE Points
High Throttle Fuel Correction: 1000rpm -17%, 2500rpm -17%, 3000 -16%, 3500rpm -15%, 4000rpm -15%, 4500rpm -15%, 5000rpm -15% and 6000rpm -15%
My turbo system is, SSAutochrome Manifold, SR T25 Turbo, SR Turbo Extension, Megan Racing 3" Downpipe, SR 370cc Injector's, Megan Racing Fuel Pressure Regulator, 300zx Fuel Filter, SR SMIC, Walboro Fuel Pump, GReddy Type S BOV (atmospheric) and the SAFC (buttons)
-------------------------------------------------------------------------
With my setup I am using a t28 .60a/r comp and .86a/r turbine, 255lph pump, 555cc injectors. Afr's are constantly watched with a plx m-300 wideband.
Lo map is -50% across the board, which gives me 14.5-15.5 afr's while cruising around town.
High map is -50% from 1000-2200rpm's, -45% at 2800rpm's and -35% 3400-7000rpm's which gives me afr's of 12.5 during spool and 10.8 to 11.5 during full boost, which is at about 10.5psi.
NE points are 1000,1600,2200,2800,3400,4000,4600,5200,5800,6400,7000, and 7600rpms
Dec settings are 1.1,1.4, and 2.0. I have no stalling problems at all.
Throttle point is 10% and 33%
All These settings are working really good for me, I have excellent streetability and it pulls like hell at WOT. However, i'm not to certain about the NE points, I have not touched them
-------------------------------------------------------------------------
I didnt not set the DECEL SETTINGs becoz it seems fine to me. is in factory default..
and my
Throttle point is: Lo 44%, Hi 45%
NE POINTS: 1000, 1600, 2200, 3400, 4000, 5000, 6000, 7000
LO : 25%, 25%, 25% , 26% , 26% , 27% , 27%, 28%
HI : 31%, 31%, 31% , 32% , 32% , 33% , 33%, 33%
everything runs fin my A/F readings are 14-14.7 when cruising but chokes when boosting.
-------------------------------------------------------------------------
-27% across the board means that for each throttle point on both HI and LO settings, set it to -27 to make it basically equivalent to what the 270s put out for fuel, but you'll be using 370cc's so you need to pull -27% counteract the size change.
This is the setup I got from a fellow BillKlineVT
under etc. menu)
Sens. Type: Hotwire
Car type: 4 cyl, arrow up and to the right "/"
do knock set just like the manual says to do
(under settings)
Th-Point: Lo 15% Hi 50%
RPM: Hi-Thrtl: Lo-Thrtl:
800 -20% -20%
2000 -20% -20%
2600 -20 -20
3200 -25 -22
3800 -24 -22
4400 -21 -16
5000 -27 -15
5200 -26 -15
5400 -26 -15
5600 -26 -15
5800 -25 -15
6400 -23 -15
Ne Points: 800,2000,2600,3200,3800,4400,5000,5200,5400,5600,5800,6400
-------------------------------------------------------------------------
stock ecu/550cc injectors/walbro/z32maf/stock FPR
ETC Menu:
Sensor type: Hot-wire: 1in 6out: 2in ADDout
Car Select: 4 cyl thr -> (arrow pointing up)
Initialize (this is the menu you use to reset the safc)
Setting Menu:
Low Throttle:
1k -50%
2-8k -40%
Hi throttle (low boost 15psi):
1-3k 0%
4k -24%
5k -30%
6-8k -31%
High Throttle (high boost 19psi)
1-3k 0%
4k -33%
5k -41%
6-8k -32%
THR Point:
20% low 40% high
Dec. Air:
Thr 2.0%
Ne1 .7%
Ne2 2.0%
-------------------------------------------------------------------------
z32 MAF
370cc injectors
walbro 255lph fuel pump
91 ka24de ecu
apexi SAFC
apexi AVC-R
apexi turbo timer
MSD 6BTM
MSD blaster coil
Split second EGO signal conditioner
ssautochrome bottom mount manifold
Garrett T25 from a red top sr20det
hks style turbo outlet
hks SSQV BOV
3 in SR downpipe, 3 in SR resonator test pipe, 3 in s13 catback exhaust
21x9x3 FMIC
2 1/2" piping
airinx type air cleaner
MAF type = Hotwire
Setting = 2in and 5out
# Of cylinder and throttle signal type, 4 and up arrow to the right
boost on average @ 7 to 8 psi with an occasional spike up to 11 psi.
lo throttle point 20%
hi throttle point 40% (fast spooling turbo)
low map -24 across
high map +20 to 21 across
on the innovate wideband, AF is steady at low 12 to mid 11 and high 10.
-------------------------------------------------------------------------
t3 @10psi
370cc injectors
stock ka maf
vpsl fmic
Throttle Point
lo - 10%
hi - 75%
Dec. Air
THR 15%
NE1 20%
NE2 16%
mess around with these and your NEPOINT settings to get the car to drop rpms correctly
Fuel Correction Maps:
Lo Throttle
RPM | COR
____________________
1000 | -35%
2000 | -13%
3000 | -7%
4000 | -4%
5000 | -1%
6000 | 0%
7000 | 0%
HI Throttle
RPM | COR
____________________
1000 | 0%
2000 | 0%
3000 | -3%
4000 | +5%
5000 | +13%
6000 | +17%
7000 | +14%
runs a bit on the rich side but it works good
-------------------------------------------------------------------------
right now I have it at -50 up to 2000 and the hi throttle to -38 accross the board, just to play it safe. by the way the rest of my setup is:
KKK K26 turbo
38MM wastegat
Walbro
Z32 MAF - Blow through
SAFC2
550cc injectors
People on the boards were telling me that the k26 was to small and not worth the time. I had the MAF maxed out @ only 7 psi. What HP level does the MAF max out at anyway. The k26 runs fine @ 12psi without dropping off so we'll see how high it can boost without falling off once I get the Wideband.
===============================================
I hope this helps more than just me.. but if not, oh well, at least someone may get some sort of info out of this..
thanks
Chuck
- nissanfanatic
- SuperMod
- Posts: 5078
- Joined: Sat Nov 20, 2004 1:16 pm
The biggest problems with these threads is that every setup is different. The main problem with SAFCs is the users fear of using it. People are so worried that they will set it wrong. There are no right or wrong answers. There is a fine line of safe and unsafe. Thats it. And that line moves.
Basically, if you have a wideband, there is no reason you need anybody elses settings. Go out and tune your car. Period.
But, damn, good of you to put in all that time posting to help people out! That is awesome!
Basically, if you have a wideband, there is no reason you need anybody elses settings. Go out and tune your car. Period.
But, damn, good of you to put in all that time posting to help people out! That is awesome!
- Covertpolarbear
- Knows Some Stuff About 240's!
- Posts: 346
- Joined: Sat Nov 20, 2004 6:55 pm
- Location: Houston TX
-
- Knows Some Stuff About 240's!
- Posts: 200
- Joined: Wed May 04, 2005 9:04 am
- Location: cincinnati, OH
-
- Dont Question My Nissan Knowledge
- Posts: 516
- Joined: Fri Mar 18, 2005 4:55 pm
- Location: WPAFB
- Contact:
can any of this infor be used for the emanage. im having problem finding info on hooking it up. all the info is always about sr
Evo 8 turbo
Forced Fab Dump/Downpipe
enthalpy ecu tune
550cc injectors
14 Kouki conversion
WWW.FORCEDFAB.COM
Forced Fab Dump/Downpipe
enthalpy ecu tune
550cc injectors
14 Kouki conversion
WWW.FORCEDFAB.COM
- aaronlee97
- Encyclopedia-Nissan
- Posts: 1018
- Joined: Wed Nov 30, 2005 1:55 pm
- Location: Houston, TX
- Efini~FC3S
- 240sx Wannabe
- Posts: 128
- Joined: Tue Mar 29, 2005 11:42 pm
- Location: Ames, IA
-
- Driving Mom's Station Wagon
- Posts: 23
- Joined: Wed Nov 16, 2005 1:06 am
- Location: Calgary, Alberta, Canada
Re: My Ultimate SAFC guide
does this mean safc2 can only handle 550cc injectors max?Covertpolarbear wrote:INJECTOR SIZING EQUATION MADE BY ME, COVERTPOLARBEAR
To determine the flow correction injector percentage,
(OEM injectors/new injectors=X ::: 1-X=Y :: move decimal 2 over, and thats your percent.)
(270/370=.73 ::: 1-.73=.27 ::: 27%)
(270/440=.61 ::: 1-.61=.39 ::: 39%)
(270/500=.54 ::: 1-.54=.45 ::: 45%)
(270/550=.49 ::: 1-.49=.51 ::: 51%)
Engine fuel pressure at stock is 34 psi with vaccum hose connected
Engine fuel pressure at stock is 43 psi with vaccum hose disconnceted.
- ispentallmymoneyontires
- Encyclopedia-Nissan
- Posts: 1463
- Joined: Tue Apr 26, 2005 7:46 pm
- Location: south florida
- Contact:
thirded for sticky
thirded?(word? probally not)
I'll be sure to link all the repetative questions towards this post.
lmao---^
i dont have a safc but if i did id probally think it was helpfull
thirded?(word? probally not)
I'll be sure to link all the repetative questions towards this post.
lmao---^
i dont have a safc but if i did id probally think it was helpfull
There are many paths to Enlightenment: but no one said they can't be taken sideways.
89'hatch rustolum black/96'motor s13 new trans/OBD1 convert/F1 flywheel/DSS steel driveshaft/headers, testpipe, egay N1dual/ JGS poly engine, tranny/ Cory's Coil mod
RIP 480sx
89'hatch rustolum black/96'motor s13 new trans/OBD1 convert/F1 flywheel/DSS steel driveshaft/headers, testpipe, egay N1dual/ JGS poly engine, tranny/ Cory's Coil mod
RIP 480sx
-
- Driving Mom's Station Wagon
- Posts: 29
- Joined: Fri Sep 23, 2005 1:43 pm
- Location: Melbourne FL
Re: My Ultimate SAFC guide
SAFC can only correct for + or - 50% of stock injector size. Example: SR20 comes with 370cc stock so the max for that motor is 740cc.vietdood wrote:does this mean safc2 can only handle 550cc injectors max?Covertpolarbear wrote:INJECTOR SIZING EQUATION MADE BY ME, COVERTPOLARBEAR
To determine the flow correction injector percentage,
(OEM injectors/new injectors=X ::: 1-X=Y :: move decimal 2 over, and thats your percent.)
(270/370=.73 ::: 1-.73=.27 ::: 27%)
(270/440=.61 ::: 1-.61=.39 ::: 39%)
(270/500=.54 ::: 1-.54=.45 ::: 45%)
(270/550=.49 ::: 1-.49=.51 ::: 51%)
Engine fuel pressure at stock is 34 psi with vaccum hose connected
Engine fuel pressure at stock is 43 psi with vaccum hose disconnceted.
Also, i like my conversion formula better ( NewInj - OldInj ) / NewInj
Re: My Ultimate SAFC guide
because the stock KA ECU is designed to run close to 14.7:1 AFR a -27% will make your car run close to 14.7 (too lean) under boost. to be on the safe side i'd recommend -20% to -15% across the board on both Low and Hi throttleCovertpolarbear wrote: TUNING SUGGESTIONS FOR 370cc injectors with a stock MAF
For both high and low throttle at each rpm point adjust the setting to ~-27% and thats it.
Here is the link to the updated pin-out diagram for US models. I doulble checked the pin-out with my FSM and it looks like it is correct (I have a S14)
http://www.apexi-usa.com/pdfInstallation/20.pdf HA HA...Hope this helps!
http://www.apexi-usa.com/pdfInstallation/20.pdf HA HA...Hope this helps!
just wondering, would an safc 2 plug up into the ecu harness that was used for an safc 1? been doing some searching and i was wondering if i could technically just swap out the safc one for the safc 2 without having to resauter the wires and stuff.......
It's cheaper to hook up your car, than to have a girlfriend.
-
- Knows Some Stuff About 240's!
- Posts: 204
- Joined: Sun Jul 17, 2005 9:32 am
- Location: SFL
-
- Knows Some Stuff About 240's!
- Posts: 242
- Joined: Mon Apr 18, 2005 2:22 pm
- Location: Nash, TN
- Contact:
thats the same set up i will be running, but did he retard the timing or used at MSD BTM? thats the thing i am worried about. I dont know if i should save up and get the MSD BTM or just run without it.t3 @10psi
370cc injectors
stock ka maf
vpsl fmic
Throttle Point
lo - 10%
hi - 75%
Dec. Air
THR 15%
NE1 20%
NE2 16%
mess around with these and your NEPOINT settings to get the car to drop rpms correctly
Fuel Correction Maps:
Lo Throttle
RPM | COR
____________________
1000 | -35%
2000 | -13%
3000 | -7%
4000 | -4%
5000 | -1%
6000 | 0%
7000 | 0%
HI Throttle
RPM | COR
____________________
1000 | 0%
2000 | 0%
3000 | -3%
4000 | +5%
5000 | +13%
6000 | +17%
7000 | +14%
runs a bit on the rich side but it works good
and i am assuming he has the walbro fuel pump, right?
Safc z32 in and out settings
Can somone explain the in and out settings for the Z32 maf?
I have seen the following diffrent settings:
1. 1 in - 6 out 2in addout
2. 2 in - 6 out
3. 1 in - 7 out
4. 4 in - 6 out
thx,
J
Would like a poll, who is running what and how did it change your other settings?
I have seen the following diffrent settings:
1. 1 in - 6 out 2in addout
2. 2 in - 6 out
3. 1 in - 7 out
4. 4 in - 6 out
thx,
J
Would like a poll, who is running what and how did it change your other settings?
-
- Driving Mom's Station Wagon
- Posts: 37
- Joined: Sat Apr 15, 2006 6:15 am
driftin2trance wrote:thats the same set up i will be running, but did he retard the timing or used at MSD BTM? thats the thing i am worried about. I dont know if i should save up and get the MSD BTM or just run without it.t3 @10psi
370cc injectors
stock ka maf
vpsl fmic
Throttle Point
lo - 10%
hi - 75%
Dec. Air
THR 15%
NE1 20%
NE2 16%
mess around with these and your NEPOINT settings to get the car to drop rpms correctly
Fuel Correction Maps:
Lo Throttle
RPM | COR
____________________
1000 | -35%
2000 | -13%
3000 | -7%
4000 | -4%
5000 | -1%
6000 | 0%
7000 | 0%
HI Throttle
RPM | COR
____________________
1000 | 0%
2000 | 0%
3000 | -3%
4000 | +5%
5000 | +13%
6000 | +17%
7000 | +14%
runs a bit on the rich side but it works good
and i am assuming he has the walbro fuel pump, right?
I too would like to know more about this, I'm gonna use the same setup aswell.
Will this set up be ok to run an atmosp. bov ( hks sqqv )
BTW:I think this should be a sticky
hey i have a question too. i'm somewhat familiar with my safc, and the corrections are based on our factory injectors, thus 270/550=x, then x-1 to get our correction. Now what is that based off of?? For a ka the max is 550's on a safc, but on an SR the max is like 680. Is that based on ecu??
I don't know if that made sense, like my s14 has a jwt ecu for 550's and z32, does that mean that I can control bigger injectors with my jwt ecu?? So with my tune for the 550's and I bump up to some 720's would I be able to control them via safc?
I don't know if that made sense, like my s14 has a jwt ecu for 550's and z32, does that mean that I can control bigger injectors with my jwt ecu?? So with my tune for the 550's and I bump up to some 720's would I be able to control them via safc?