SAFC II question - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

vinhisbored · 06-23-2005, 11:36 AM

I know it's sort of a 'newbie' question like usual.. but I just bought my friend's SAFC II from him.. to run with my car. Uh, my question is this.. I'm going to run a KA-T.. and I know that SAFC II can only handle 50% -/+ on a car, or for the injectors. I believe the stock injectors are 270cc? So, that makes the most it can handle.. a little bit over the 400cc range. My question is this.. this device is able to work on various different cars, so how exactly will it know how much it will be able to run? I mean, it's not like the SAFC II can know that the 'stock' injectors SHOULD be 270cc. I'm not trying to risk it and slap like some 550cc + injectors on there, but I'm just wondering..

eyustfu · 06-23-2005, 11:47 AM

Quote:

Originally Posted by vinhisbored

I know it's sort of a 'newbie' question like usual.. but I just bought my friend's SAFC II from him.. to run with my car. Uh, my question is this.. I'm going to run a KA-T.. and I know that SAFC II can only handle 50% -/+ on a car, or for the injectors. I believe the stock injectors are 270cc? So, that makes the most it can handle.. a little bit over the 400cc range. My question is this.. this device is able to work on various different cars, so how exactly will it know how much it will be able to run? I mean, it's not like the SAFC II can know that the 'stock' injectors SHOULD be 270cc. I'm not trying to risk it and slap like some 550cc + injectors on there, but I'm just wondering..

it doesnt know how much to run, the user has to set it by making it lean/rich by percentages at the desired RPM. at 0% it should be the stock injectors that the ecu is programmed for

vinhisbored · 06-23-2005, 11:56 AM

So it would be 'possible' to run, but it would throw lots of code I'm guessing?

janko · 06-23-2005, 01:32 PM

If you hook it up right it won't throw codes. It sits between the mafs and ecu changing the signal sent to the ECU which in turn will cause the ECU richen or lean out the car based on the desired adjustment at each RPM interval. Obviously you can do serious damage if you don't know what you are doing but properly tuned and installed it will not throw a code. Also, I am not too sure about the 270cc -> 400cc thing you mentioned. It will raise or lower your AFR by +/- 50% not raise the maximum design flow rate of the injectors. If you're using a z32 mafs you're going to want to make sure you set the SAFC to be reading an actual z32 mafs but be sending the sr20 mafs to the ecu.

mellojoe · 06-23-2005, 04:48 PM

the way I understand it:

The S-AFC can tune out 50% of an injector's pulse. No, wait I didn't say that right. It can tune out pulse widths equal to 50% over the stock injector size. Get it? So, a car that comes stock with 270cc injectors; it can tune 405cc down to 270cc no problem. If your car comes stock with 440cc, then it can tune 660cc down to stock.

Get it?

From what I understand, anyway. I've seen people use 550cc injectors with a KA-T project and it seems to work with just an SAFC. So, I don't know for certain.

vinhisbored · 06-23-2005, 05:57 PM

Does anyone on Zilvia have a KA-T that is running a SAFC with bigger injectors than 370cc? If they do, please contribute anything. Standalone is out of the question right now, but I'll be getting that in the long run, so I don't wanna be getting an ecu upgrade.

ALTRNTV · 06-25-2005, 04:02 AM

Yea. I want to know more about this.

vinhisbored · 06-25-2005, 11:37 AM

Anybody? Please? Haha just trying to find out what would happen..

BillKlineVT · 06-25-2005, 10:51 PM

I run 550cc injectors (deastchwerks.com sidefeeds) and fuel is taken care of with just an safc2. People don't believe it is possible, but I'm not the only one that has done this... it is possible for sure... I had to make my z32 maf setting to 1 IN 6 OUT instead of 2 IN 5 OUT (recommended for s14 ecu to z32 mafs), but that may differ for you.

vinhisbored · 06-25-2005, 11:57 PM

Quote:

Originally Posted by BillKlineVT

I run 550cc injectors (deastchwerks.com sidefeeds) and fuel is taken care of with just an safc2. People don't believe it is possible, but I'm not the only one that has done this... it is possible for sure... I had to make my z32 maf setting to 1 IN 6 OUT instead of 2 IN 5 OUT (recommended for s14 ecu to z32 mafs), but that may differ for you.

So you are running an SAFCII on a KA-T right? (With stock internals?) How big is your turbine? Could you list your setup? How does it run? Please let me know for I am really curious because I plan on running with some mild injectors right now 400-500 cc range, as well as a 60-1 turbine. I just plan on running with stock boost though.

vinhisbored · 06-26-2005, 11:42 PM

Someone please help me..

ALTRNTV · 06-27-2005, 12:15 AM

LOL. Just go to KA-T.org

They can help you out more over there. That's where I get all my info on KA-T's.

06-23-2005, 11:36 AM	#1
vinhisbored Zilvia FREAK! Join Date: Apr 2005 Location: socal Posts: 1,359 Trader Rating: (15) Feedback Score: 15 reviews	SAFC II question I know it's sort of a 'newbie' question like usual.. but I just bought my friend's SAFC II from him.. to run with my car. Uh, my question is this.. I'm going to run a KA-T.. and I know that SAFC II can only handle 50% -/+ on a car, or for the injectors. I believe the stock injectors are 270cc? So, that makes the most it can handle.. a little bit over the 400cc range. My question is this.. this device is able to work on various different cars, so how exactly will it know how much it will be able to run? I mean, it's not like the SAFC II can know that the 'stock' injectors SHOULD be 270cc. I'm not trying to risk it and slap like some 550cc + injectors on there, but I'm just wondering..

06-23-2005, 01:32 PM	#4
janko Leaky Injector Join Date: May 2005 Location: NY Posts: 141 Trader Rating: (0) Feedback Score: 0 reviews	If you hook it up right it won't throw codes. It sits between the mafs and ecu changing the signal sent to the ECU which in turn will cause the ECU richen or lean out the car based on the desired adjustment at each RPM interval. Obviously you can do serious damage if you don't know what you are doing but properly tuned and installed it will not throw a code. Also, I am not too sure about the 270cc -> 400cc thing you mentioned. It will raise or lower your AFR by +/- 50% not raise the maximum design flow rate of the injectors. If you're using a z32 mafs you're going to want to make sure you set the SAFC to be reading an actual z32 mafs but be sending the sr20 mafs to the ecu. __________________ '92 G20 '96 240sx

06-23-2005, 04:48 PM	#5
mellojoe Zilvia Junkie Join Date: Jan 2004 Location: ARKANSAS Posts: 518 Trader Rating: (0) Feedback Score: 0 reviews	the way I understand it: The S-AFC can tune out 50% of an injector's pulse. No, wait I didn't say that right. It can tune out pulse widths equal to 50% over the stock injector size. Get it? So, a car that comes stock with 270cc injectors; it can tune 405cc down to 270cc no problem. If your car comes stock with 440cc, then it can tune 660cc down to stock. Get it? From what I understand, anyway. I've seen people use 550cc injectors with a KA-T project and it seems to work with just an SAFC. So, I don't know for certain. __________________

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06-23-2005, 11:56 AM	#3
vinhisbored Zilvia FREAK! Join Date: Apr 2005 Location: socal Posts: 1,359 Trader Rating: (15) Feedback Score: 15 reviews	So it would be 'possible' to run, but it would throw lots of code I'm guessing?

06-23-2005, 05:57 PM	#6
vinhisbored Zilvia FREAK! Join Date: Apr 2005 Location: socal Posts: 1,359 Trader Rating: (15) Feedback Score: 15 reviews	Does anyone on Zilvia have a KA-T that is running a SAFC with bigger injectors than 370cc? If they do, please contribute anything. Standalone is out of the question right now, but I'll be getting that in the long run, so I don't wanna be getting an ecu upgrade.

06-25-2005, 04:02 AM	#7
ALTRNTV Post Whore! Join Date: Mar 2003 Location: Western Conference Posts: 9,429 Trader Rating: (0) Feedback Score: 0 reviews	Yea. I want to know more about this.

06-25-2005, 11:37 AM	#8
vinhisbored Zilvia FREAK! Join Date: Apr 2005 Location: socal Posts: 1,359 Trader Rating: (15) Feedback Score: 15 reviews	Anybody? Please? Haha just trying to find out what would happen..

06-25-2005, 10:51 PM	#9
BillKlineVT Zilvia Member Join Date: Nov 2002 Location: Vermont / Virginia Tech Age: 36 Posts: 175 Trader Rating: (0) Feedback Score: 0 reviews	I run 550cc injectors (deastchwerks.com sidefeeds) and fuel is taken care of with just an safc2. People don't believe it is possible, but I'm not the only one that has done this... it is possible for sure... I had to make my z32 maf setting to 1 IN 6 OUT instead of 2 IN 5 OUT (recommended for s14 ecu to z32 mafs), but that may differ for you.

06-26-2005, 11:42 PM	#11
vinhisbored Zilvia FREAK! Join Date: Apr 2005 Location: socal Posts: 1,359 Trader Rating: (15) Feedback Score: 15 reviews	Someone please help me..

06-27-2005, 12:15 AM	#12
ALTRNTV Post Whore! Join Date: Mar 2003 Location: Western Conference Posts: 9,429 Trader Rating: (0) Feedback Score: 0 reviews	LOL. Just go to KA-T.org They can help you out more over there. That's where I get all my info on KA-T's.