Stock S14 SR and Z32MAF = SLOW - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Pstl_pete · 07-11-2005, 12:11 PM

Having recently performed my swap I went with a Z32 MAF instead of using the stock one (hard to find) and ran a SAFC. I set up the SAFC as per the instructions and the car runs fine during normal cruising but at WOT it is lack luster at best.
I have an AEM wideband and the sucker shows full rich (greater than 11:1) @ 10psi. So I pulled some fuel out, 20% (isnt that alot?) in the upper rpm range, and finally its up to about 11.5:1 AFR. BUT the upon acceleration the car is still sluggish at certain rpm points. Right now it would require alot more tuning to smooth out the powerband which I dont really want to do.

I guess my main question is have people experienced these types of conditions when running the Z32MAF and using the SAFC to compensate it? I am thinking of getting an Enthalpy tune done rather than waste countless hours trying to tune the problems areas out with a SAFC.

Any advice would be greatly appreciated.

Relevent info:
S14 engine
FMIC
Walbro
Full 3-inch exhaust

BoostInnovations · 07-11-2005, 12:38 PM

the stock ecu does not like the Z32 MAF

TheSparo · 07-11-2005, 11:02 PM

i'd say countless hours is worth more than $500 tune for a stock SR

Dousan_PG · 07-11-2005, 11:18 PM

of course, its stock.
what did you expect?

420sx · 07-11-2005, 11:32 PM

ditch it, get SOHC ka maf for cheap. come on man, what the fuck...

Pstl_pete · 07-12-2005, 12:05 PM

The SOHC MAF dont work bro, I tried. I need to find an S14 maf.

And if the ecu is being sent out for a tune then Im going to add injectors into the mix. Im not going to throw money away just to retune a maf.

uno · 07-12-2005, 12:10 PM

what do you have the hotwire in/out settings set to?

Dousan_PG · 07-12-2005, 02:41 PM

yeah soch and s14 dont work so hot. dont waste the time

its stock so sure as hell wont be fast
whats your In/out on the safc?
i forget if s14 is 2/5 or something, im using a RB one have to put my z32 one back on one day...
i have a chuuki s14 motor

uno · 07-12-2005, 02:50 PM

on apexi's website it shows z32 maf is Hotwire 2 so set it to 2 in 2 out on your safc if you haven't already done that.

BoostInnovations · 07-12-2005, 08:13 PM

2/5 is for S13 i believe...maybe its 2/6 i cant remember

theicecreamdan · 07-12-2005, 08:14 PM

yeah, the out should be whatever MAF your ECU is expecting, 6 or 5

uno · 07-13-2005, 07:41 AM

yeah good point, i forgot about that. thanks guys. wonder if he ever got it fixed?

DoriftoSlut · 07-13-2005, 10:26 AM

ARGH YOU GUYS SUCK!!!

SAFC settings IN/OUT are so that the SAFC can read the IN setting from 1 MAFS and send the ecu the OUT signal from another MAFS. OUT is always going to coincide with what ECU you have. And IN will always be what MAFS you have!

For S14 ECU, the signal is 5. If you have an S13 Ecu the signal is 6. If you have a Z32 the signal is 2. Therefore, an S13 MAFS on S14 SR COULD work with a IN 6, OUT 5 setting. Trust me, that will run like ass. It will work, but it will run like ass. And you have an SAFC. And Z32. Might as well put 2 and 2 together....

IN 2, OUT 5.

2 is the MAFS signal from the z32 into the SAFC, which interprets all those little numbers and send out different little numbers to the ECU. In this case, S14 SR, OUT is 5 designation.

AGAIN!!!!

IN 2, OUT 5!

But your car will probably still idle like crap. Z MAFS has such a big diameter that our cars at idle sometimes don't draw enough air across the MAFS to give accurate readings. Thats also why you will need to adjust the fuel settigns on the SAFC in order for it to idle steadily.

Someone say something.

BoostInnovations · 07-13-2005, 04:12 PM

my stock S13 ecu with the Z32 MAF and SAFCII idles like crap and doesnt run good until the middle of the RPM range...also it doesnt seem to like it up high in range either...5k+...

WeldingHank · 07-13-2005, 08:23 PM

i don't have a problem with idle on my CA18 with the Z32 MAF. but i would agree with everyone else, its a pretty much stock SR, i wouldn't expect much. why not try upping the boost?

Pstl_pete · 07-13-2005, 08:35 PM

As I mentioned the car drives and idles fine. Probably because I have the correct 2 IN 5 OUT settings on the SAFC. The WOT is the problem.

I would up the boost but having the stock 370cc injectors, I am already close to maxing them out at 11 psi.

Im going to find an S14 maf and give that one a try to see how well it runs compared to the Z32 one. Ill keep you all posted.

SRfairladyZ · 07-14-2005, 09:15 PM

Strange, my 1998 S14 engine with Z32 maf and safc is set at 1in 6out right now. I just tried 2in 5out and the idle was about the same, took it for a boost and hit a fuel cut at 5000rpm. Any other setting makes my car stall and rev real rough. 1in 6out seems to be working fine for me. except for sometimes having alittle break up ONLY at low rpms sometimes. also feels i maybe missing some power. Its gotta be dumping fuel cause i get lots of backfires. Tried leaning out the SAFC some and i get no diffrence really. My power also seems to vary though out the rpms, but its not breaking up AT ALL at WOT. feels like my fuel is being played with. I have NGK-R temp # bkr6, gapped to .030. cleaned my Z32 MAF wires with alcohal too. Any other ideas? Thanks.

Pstl_pete · 07-14-2005, 10:03 PM

Quote:

Originally Posted by SRfairladyZ

Strange, my 1998 S14 engine with Z32 maf and safc is set at 1in 6out right now. I just tried 2in 5out and the idle was about the same, took it for a boost and hit a fuel cut at 5000rpm. Any other setting makes my car stall and rev real rough. 1in 6out seems to be working fine for me. except for sometimes having alittle break up ONLY at low rpms sometimes. also feels i maybe missing some power. Its gotta be dumping fuel cause i get lots of backfires. Tried leaning out the SAFC some and i get no diffrence really. My power also seems to vary though out the rpms, but its not breaking up AT ALL at WOT. feels like my fuel is being played with. I have NGK-R temp # bkr6, gapped to .030. cleaned my Z32 MAF wires with alcohal too. Any other ideas? Thanks.

The 1in 6out setting you are running is incorrect. I would reset your SAFC and input the 2in 5out as per the SAFC Manual, check below.
I dont think there is much you can do to fix the patchy-ness, it seems like the SAFC isnt doing that great a job converting everything. Im going to try an S14 MAF and see how much better the car runs WOT.

Now to kill any confusion about what settings to run here it is straight from the APEXi manual.

HitAndRunCrew · 07-14-2005, 11:03 PM

Hey are you still looking for a S14 MAF...I have a zenki one and a Kouki one, let me know which one you need if you do...Dave

SRfairladyZ · 07-15-2005, 12:54 PM

Welp, my settings maybe wrong, but my car runs and boost fine pretty much. The 2in 5out gives me a fuel cut at 5500, the same kinda cut i was getting with a Q45 maf. Not sure whats going on with that- but i'll stick with the 1in 6out setting for now.

SRfairladyZ · 07-15-2005, 01:47 PM

My bad, made a mistake in my last post. When my car is set to 2in 5out the car does not run at all, stalls.. hold the gas and the engine cant even build rpms..just a misfiring mess. The fuel cut i had happend when i tried a diffrent setting. I have a late S14 engine/ecu. just about the same ECU and harness as an S15. Actully wired up the car with a S15 manual since the late S14 manuals are totaly non existant. What the hell would make my car run fine 1in 6out but not even rev on the correct setting of 2in 5out??

Ahh, think ive found something. setting 6out is for a 96-99 rps13. Seems i have a late rpS13 engine rather then a late S14 engine! That still doesnt tell me why i get fuel cut with 2in though, and No fuel cut when set 1in. hmm

07-11-2005, 12:11 PM	#1
Pstl_pete Zilvia Junkie Join Date: Nov 2004 Location: LA,CA & Windsor, ON Posts: 443 Trader Rating: (4) Feedback Score: 4 reviews	Stock S14 SR and Z32MAF = SLOW Having recently performed my swap I went with a Z32 MAF instead of using the stock one (hard to find) and ran a SAFC. I set up the SAFC as per the instructions and the car runs fine during normal cruising but at WOT it is lack luster at best. I have an AEM wideband and the sucker shows full rich (greater than 11:1) @ 10psi. So I pulled some fuel out, 20% (isnt that alot?) in the upper rpm range, and finally its up to about 11.5:1 AFR. BUT the upon acceleration the car is still sluggish at certain rpm points. Right now it would require alot more tuning to smooth out the powerband which I dont really want to do. I guess my main question is have people experienced these types of conditions when running the Z32MAF and using the SAFC to compensate it? I am thinking of getting an Enthalpy tune done rather than waste countless hours trying to tune the problems areas out with a SAFC. Any advice would be greatly appreciated. Relevent info: S14 engine FMIC Walbro Full 3-inch exhaust

07-11-2005, 11:02 PM	#3
TheSparo Zilvia FREAK! Join Date: Sep 2002 Location: Athens/Chattanooga/ Cookeville/Morristown, TN Age: 39 Posts: 1,141 Trader Rating: (0) Feedback Score: 0 reviews	i'd say countless hours is worth more than $500 tune for a stock SR __________________ 89 240 SR powered... ummm i promise its stock

07-11-2005, 11:18 PM	#4
Dousan_PG Post Whore! Join Date: May 2002 Location: Orange County, California Age: 46 Posts: 16,640 Trader Rating: (23) Rides Gallery: Dousan_PG Feedback Score: 23 reviews	of course, its stock. what did you expect? __________________ Aaron Pink GodziRa www.geocities.com/pink_godzira

07-11-2005, 11:32 PM	#5
420sx Post Whore! Join Date: Jun 2004 Location: Texas Age: 42 Posts: 3,960 Trader Rating: (0) Rides Gallery: 420sx Feedback Score: 0 reviews	ditch it, get SOHC ka maf for cheap. come on man, what the fuck... __________________ hydropgrahics! ls1......

07-12-2005, 12:10 PM	#7
uno Zilvia Member Join Date: Mar 2003 Location: Castlewood VA Age: 43 Posts: 174 Trader Rating: (0) Feedback Score: 0 reviews	what do you have the hotwire in/out settings set to? __________________ CA18DET t25, 440CC injectors, Greddy FMIC, Greddy Hot Pipe, Greddy Type RS Bov ,Greddy Turbo Outlet, Trust DP, Motoria 3" Catback , XS Tubular Manifold, Nismo AFPR ,Nismo Engine and Transmission Mounts ,Apex'i SAFC 2 Walbro 255lph, LSD, SPL Subframe Collars, Tein S Tech Springs, Tein Tie Rods, Upper Front and Rear Strut Tower Braces. Black 180sx wheels.

07-11-2005, 12:38 PM	#2
BoostInnovations Zilvia Junkie Join Date: Jun 2005 Location: Moorhead, MN Age: 39 Posts: 322 Trader Rating: (0) Feedback Score: 0 reviews	the stock ecu does not like the Z32 MAF

07-12-2005, 12:05 PM	#6
Pstl_pete Zilvia Junkie Join Date: Nov 2004 Location: LA,CA & Windsor, ON Posts: 443 Trader Rating: (4) Feedback Score: 4 reviews	The SOHC MAF dont work bro, I tried. I need to find an S14 maf. And if the ecu is being sent out for a tune then Im going to add injectors into the mix. Im not going to throw money away just to retune a maf.

07-12-2005, 02:41 PM	#8
Dousan_PG Post Whore! Join Date: May 2002 Location: Orange County, California Age: 46 Posts: 16,640 Trader Rating: (23) Rides Gallery: Dousan_PG Feedback Score: 23 reviews	yeah soch and s14 dont work so hot. dont waste the time its stock so sure as hell wont be fast whats your In/out on the safc? i forget if s14 is 2/5 or something, im using a RB one have to put my z32 one back on one day... i have a chuuki s14 motor __________________ Aaron Pink GodziRa www.geocities.com/pink_godzira

07-12-2005, 02:50 PM	#9
uno Zilvia Member Join Date: Mar 2003 Location: Castlewood VA Age: 43 Posts: 174 Trader Rating: (0) Feedback Score: 0 reviews	on apexi's website it shows z32 maf is Hotwire 2 so set it to 2 in 2 out on your safc if you haven't already done that. __________________ CA18DET t25, 440CC injectors, Greddy FMIC, Greddy Hot Pipe, Greddy Type RS Bov ,Greddy Turbo Outlet, Trust DP, Motoria 3" Catback , XS Tubular Manifold, Nismo AFPR ,Nismo Engine and Transmission Mounts ,Apex'i SAFC 2 Walbro 255lph, LSD, SPL Subframe Collars, Tein S Tech Springs, Tein Tie Rods, Upper Front and Rear Strut Tower Braces. Black 180sx wheels.

07-12-2005, 08:13 PM	#10
BoostInnovations Zilvia Junkie Join Date: Jun 2005 Location: Moorhead, MN Age: 39 Posts: 322 Trader Rating: (0) Feedback Score: 0 reviews	2/5 is for S13 i believe...maybe its 2/6 i cant remember

07-13-2005, 07:41 AM	#12
uno Zilvia Member Join Date: Mar 2003 Location: Castlewood VA Age: 43 Posts: 174 Trader Rating: (0) Feedback Score: 0 reviews	yeah good point, i forgot about that. thanks guys. wonder if he ever got it fixed? __________________ CA18DET t25, 440CC injectors, Greddy FMIC, Greddy Hot Pipe, Greddy Type RS Bov ,Greddy Turbo Outlet, Trust DP, Motoria 3" Catback , XS Tubular Manifold, Nismo AFPR ,Nismo Engine and Transmission Mounts ,Apex'i SAFC 2 Walbro 255lph, LSD, SPL Subframe Collars, Tein S Tech Springs, Tein Tie Rods, Upper Front and Rear Strut Tower Braces. Black 180sx wheels.

07-13-2005, 10:26 AM	#13
DoriftoSlut Nissanaholic! Join Date: Nov 2002 Location: SoCal and Hawaii Age: 41 Posts: 1,986 Trader Rating: (0) Feedback Score: 0 reviews	ARGH YOU GUYS SUCK!!! SAFC settings IN/OUT are so that the SAFC can read the IN setting from 1 MAFS and send the ecu the OUT signal from another MAFS. OUT is always going to coincide with what ECU you have. And IN will always be what MAFS you have! For S14 ECU, the signal is 5. If you have an S13 Ecu the signal is 6. If you have a Z32 the signal is 2. Therefore, an S13 MAFS on S14 SR COULD work with a IN 6, OUT 5 setting. Trust me, that will run like ass. It will work, but it will run like ass. And you have an SAFC. And Z32. Might as well put 2 and 2 together.... IN 2, OUT 5. 2 is the MAFS signal from the z32 into the SAFC, which interprets all those little numbers and send out different little numbers to the ECU. In this case, S14 SR, OUT is 5 designation. AGAIN!!!! IN 2, OUT 5! But your car will probably still idle like crap. Z MAFS has such a big diameter that our cars at idle sometimes don't draw enough air across the MAFS to give accurate readings. Thats also why you will need to adjust the fuel settigns on the SAFC in order for it to idle steadily. Someone say something. __________________ Death Before Dishonor. www.pinkgodzira.com www.driftalliance.com

07-13-2005, 04:12 PM	#14
BoostInnovations Zilvia Junkie Join Date: Jun 2005 Location: Moorhead, MN Age: 39 Posts: 322 Trader Rating: (0) Feedback Score: 0 reviews	my stock S13 ecu with the Z32 MAF and SAFCII idles like crap and doesnt run good until the middle of the RPM range...also it doesnt seem to like it up high in range either...5k+...

07-13-2005, 08:23 PM	#15
WeldingHank Leaky Injector Join Date: Feb 2004 Location: Massachusetts Posts: 137 Trader Rating: (0) Feedback Score: 0 reviews	i don't have a problem with idle on my CA18 with the Z32 MAF. but i would agree with everyone else, its a pretty much stock SR, i wouldn't expect much. why not try upping the boost? __________________ 1989 240sx:CA18DET My Cardomain

07-13-2005, 08:35 PM	#16
Pstl_pete Zilvia Junkie Join Date: Nov 2004 Location: LA,CA & Windsor, ON Posts: 443 Trader Rating: (4) Feedback Score: 4 reviews	As I mentioned the car drives and idles fine. Probably because I have the correct 2 IN 5 OUT settings on the SAFC. The WOT is the problem. I would up the boost but having the stock 370cc injectors, I am already close to maxing them out at 11 psi. Im going to find an S14 maf and give that one a try to see how well it runs compared to the Z32 one. Ill keep you all posted.

07-14-2005, 09:15 PM	#17
SRfairladyZ Leaky Injector Join Date: Feb 2005 Location: nyc Posts: 56 Trader Rating: (0) Feedback Score: 0 reviews	Strange, my 1998 S14 engine with Z32 maf and safc is set at 1in 6out right now. I just tried 2in 5out and the idle was about the same, took it for a boost and hit a fuel cut at 5000rpm. Any other setting makes my car stall and rev real rough. 1in 6out seems to be working fine for me. except for sometimes having alittle break up ONLY at low rpms sometimes. also feels i maybe missing some power. Its gotta be dumping fuel cause i get lots of backfires. Tried leaning out the SAFC some and i get no diffrence really. My power also seems to vary though out the rpms, but its not breaking up AT ALL at WOT. feels like my fuel is being played with. I have NGK-R temp # bkr6, gapped to .030. cleaned my Z32 MAF wires with alcohal too. Any other ideas? Thanks.

07-14-2005, 11:03 PM	#19
HitAndRunCrew Join Date: Jun 2005 Location: Okinawa Japan Age: 46 Posts: 39 Trader Rating: (0) Feedback Score: 0 reviews	Hey are you still looking for a S14 MAF...I have a zenki one and a Kouki one, let me know which one you need if you do...Dave __________________ S14 Silvia Kouki Engine S15 Turbine Impul ECU Trust FMIC JUN Flywheel Nismo Coppermix Clutch Tein HE Coilovers Fabulous 18x10.5 +04 Rr 18x9 +14 Fr Dart Izumi Dual Tip Fence Pipes ATS 2 Way Diff Vertex Kit 326 power Graphix

07-15-2005, 12:54 PM	#20
SRfairladyZ Leaky Injector Join Date: Feb 2005 Location: nyc Posts: 56 Trader Rating: (0) Feedback Score: 0 reviews	Welp, my settings maybe wrong, but my car runs and boost fine pretty much. The 2in 5out gives me a fuel cut at 5500, the same kinda cut i was getting with a Q45 maf. Not sure whats going on with that- but i'll stick with the 1in 6out setting for now. __________________ 1971 240Z SR20det. 1989 300ZX VG30ET

07-15-2005, 01:47 PM	#21
SRfairladyZ Leaky Injector Join Date: Feb 2005 Location: nyc Posts: 56 Trader Rating: (0) Feedback Score: 0 reviews	My bad, made a mistake in my last post. When my car is set to 2in 5out the car does not run at all, stalls.. hold the gas and the engine cant even build rpms..just a misfiring mess. The fuel cut i had happend when i tried a diffrent setting. I have a late S14 engine/ecu. just about the same ECU and harness as an S15. Actully wired up the car with a S15 manual since the late S14 manuals are totaly non existant. What the hell would make my car run fine 1in 6out but not even rev on the correct setting of 2in 5out?? Ahh, think ive found something. setting 6out is for a 96-99 rps13. Seems i have a late rpS13 engine rather then a late S14 engine! That still doesnt tell me why i get fuel cut with 2in though, and No fuel cut when set 1in. hmm __________________ 1971 240Z SR20det. 1989 300ZX VG30ET Last edited by SRfairladyZ; 07-15-2005 at 03:12 PM..