What are your stock air fuel levels? - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

S13alldayyo · 07-19-2013, 07:41 PM

Trying to find out what the stock sr20det's afr's stand by, my completely stock sr20det blacktop swap with 255 pump, fmic and just full exhaust idles at 17.0-18.0 constantly, cruising around i get 13.5-14.5 and at full throttle it kreeps to 10.0 at i would say about 5,500 or 6000 rpm wich is way to rich (most likely richer as my wideband reads up to 10 only)

derass · 07-20-2013, 01:40 AM

My stock Sr and ecu would run ~10 afr at full throttle. It would cruise and idle around 14.7

S13alldayyo · 07-20-2013, 08:31 AM

What about idle? We need to get a fpr and turn spme psi down haha

mr.nismo. · 07-20-2013, 10:07 AM

idle:14.7
cruise:14.7-15.1
WOT: 10.5-11

my tomei fpr is 37 psi at idle and i have an o2 sensor plugged in. i have a blitz fmic and a 255 pump as well. 17-18 afr is detonation territory man

S13alldayyo · 07-20-2013, 11:08 AM

It idles at 17-18 and idles 100%perfect and picks up perfect, i think maybe my o2 is maybe too far for the sr20's little idle exhaust flow, its at the end of my down pipe, right infront of the test pipe , basically all the way at the end of the downpipe.

S13alldayyo · 07-20-2013, 11:10 AM

Mine at wot is 10 because i havnt turned down my fuel pressure i have the oem fpr

derass · 07-20-2013, 12:14 PM

the end of the downpipe is the correct location for turbo applications.

you shouldnt be turning down the fuel pressure, thats just the way the stock computer is programmed, rich for safety

S13alldayyo · 07-20-2013, 12:30 PM

My cruis is 13.2-14.0 and wot is under the 10s and my idle is lean.... Stock fuel pressure should be 43 without vaccumm on a stock pump if you put a big 255 pump your fuel pressure will raise and so will your afr.. (i tested this on my old ka-t swap the idle afr changed as i adjusted fuel pressure) so i honestly dont think the ecu will compensate and know that there is more fuel

slideslidegnarslide · 07-20-2013, 01:03 PM

Are you guys comfortably ripping on your cars at an afr of 10.0 to 10.6? My car dips that low under wot and it freaks me out. My oil smelled of fuel and I just got scared so now I won't even rip on it. Compression is great I'm just don't want the fuel to break down the oil and blow my shit up. I changed my oil but I still don't want to rip on it.

What do you guys think?

I'm just gonna get a retune when I have the money but should I not be so scared?

S13alldayyo · 07-20-2013, 01:13 PM

Get a fpr gauge and make sure its at oem spec first

mr.nismo. · 07-20-2013, 08:03 PM

my wideband is right before my test pipe as well. what angle is it at? if its below 3 or 9 oclock condensation could be fucking up your readings. 18 afr at idle? it should be struggling to stay alive. i made my mistakes on nistune with my ka and it would barely stay alive if it got that lean at idle

S13alldayyo · 07-20-2013, 08:55 PM

Its like at 3 o'clock

S13alldayyo · 07-20-2013, 08:57 PM

Its on the upper half for sure

mr.nismo. · 07-20-2013, 09:14 PM

what wideband do you have?

S13alldayyo · 07-21-2013, 12:37 AM

Aem wideband

mr.nismo. · 07-21-2013, 11:02 AM

Stock sr idleing at 17-18? Something's not right. Have you tried recalibrating the wideband?

S13alldayyo · 07-21-2013, 11:06 AM

Aem doesnt need recalibrating

cotbu · 07-21-2013, 11:45 AM

AEM widebands suck! because of this

Quote:

Aem doesnt need recalibrating

Beemer · 07-21-2013, 02:49 PM

My sr20 idled at 16:1-and maxing out the gauge and it ended up being a vacuum leak. It was barely running. When I bottomed out my sensor hit what ever i bottomed out and was damaged,its reading were really lean and it never read past 14:1. Maybe you have a damaged senor.I use aem ugeo.

S13alldayyo · 07-21-2013, 08:11 PM

I dont want to buy a sensor and ends up reading the same lol, all i know is that my car idles perfect and has no lag throghout rpm range

mr.nismo. · 07-22-2013, 01:43 PM

then your gauge is lying to you. theres no way it idles at 17-18 and is perfectly fine. i didnt get an AEM because of stories like these.

nickauger · 07-22-2013, 04:23 PM

Buy a innovate motorsport wideband !

mr.nismo. · 07-22-2013, 04:25 PM

Quote:

Originally Posted by nickauger

Buy a innovate motorsport wideband !

this^ get the mtx-l

07-19-2013, 07:41 PM	#1
S13alldayyo Zilvia Addict Join Date: Mar 2012 Location: Florida Posts: 653 Trader Rating: (3) Feedback Score: 3 reviews	What are your stock air fuel levels? Trying to find out what the stock sr20det's afr's stand by, my completely stock sr20det blacktop swap with 255 pump, fmic and just full exhaust idles at 17.0-18.0 constantly, cruising around i get 13.5-14.5 and at full throttle it kreeps to 10.0 at i would say about 5,500 or 6000 rpm wich is way to rich (most likely richer as my wideband reads up to 10 only)

07-20-2013, 01:40 AM	#2
derass Zilvia FREAK! Join Date: Jun 2010 Location: Toronto, ON Age: 36 Posts: 1,182 Trader Rating: (0) Feedback Score: 0 reviews	My stock Sr and ecu would run ~10 afr at full throttle. It would cruise and idle around 14.7 Last edited by derass; 07-20-2013 at 12:10 PM..

07-20-2013, 08:31 AM	#3
S13alldayyo Zilvia Addict Join Date: Mar 2012 Location: Florida Posts: 653 Trader Rating: (3) Feedback Score: 3 reviews	What about idle? We need to get a fpr and turn spme psi down haha

07-20-2013, 10:07 AM	#4
mr.nismo. Nissanaholic! Join Date: Feb 2012 Location: Oxnard, CA Age: 30 Posts: 1,890 Trader Rating: (31) Feedback Score: 31 reviews	idle:14.7 cruise:14.7-15.1 WOT: 10.5-11 my tomei fpr is 37 psi at idle and i have an o2 sensor plugged in. i have a blitz fmic and a 255 pump as well. 17-18 afr is detonation territory man

07-20-2013, 11:08 AM	#5
S13alldayyo Zilvia Addict Join Date: Mar 2012 Location: Florida Posts: 653 Trader Rating: (3) Feedback Score: 3 reviews	It idles at 17-18 and idles 100%perfect and picks up perfect, i think maybe my o2 is maybe too far for the sr20's little idle exhaust flow, its at the end of my down pipe, right infront of the test pipe , basically all the way at the end of the downpipe.

07-20-2013, 11:10 AM	#6
S13alldayyo Zilvia Addict Join Date: Mar 2012 Location: Florida Posts: 653 Trader Rating: (3) Feedback Score: 3 reviews	Mine at wot is 10 because i havnt turned down my fuel pressure i have the oem fpr

07-20-2013, 12:14 PM	#7
derass Zilvia FREAK! Join Date: Jun 2010 Location: Toronto, ON Age: 36 Posts: 1,182 Trader Rating: (0) Feedback Score: 0 reviews	the end of the downpipe is the correct location for turbo applications. you shouldnt be turning down the fuel pressure, thats just the way the stock computer is programmed, rich for safety

07-20-2013, 12:30 PM	#8
S13alldayyo Zilvia Addict Join Date: Mar 2012 Location: Florida Posts: 653 Trader Rating: (3) Feedback Score: 3 reviews	My cruis is 13.2-14.0 and wot is under the 10s and my idle is lean.... Stock fuel pressure should be 43 without vaccumm on a stock pump if you put a big 255 pump your fuel pressure will raise and so will your afr.. (i tested this on my old ka-t swap the idle afr changed as i adjusted fuel pressure) so i honestly dont think the ecu will compensate and know that there is more fuel

07-20-2013, 01:03 PM	#9
slideslidegnarslide Zilvia FREAK! Join Date: Mar 2010 Location: philly area Age: 34 Posts: 1,408 Trader Rating: (29) Feedback Score: 29 reviews	Are you guys comfortably ripping on your cars at an afr of 10.0 to 10.6? My car dips that low under wot and it freaks me out. My oil smelled of fuel and I just got scared so now I won't even rip on it. Compression is great I'm just don't want the fuel to break down the oil and blow my shit up. I changed my oil but I still don't want to rip on it. What do you guys think? I'm just gonna get a retune when I have the money but should I not be so scared?

07-20-2013, 01:13 PM	#10
S13alldayyo Zilvia Addict Join Date: Mar 2012 Location: Florida Posts: 653 Trader Rating: (3) Feedback Score: 3 reviews	Get a fpr gauge and make sure its at oem spec first

07-20-2013, 08:03 PM	#11
mr.nismo. Nissanaholic! Join Date: Feb 2012 Location: Oxnard, CA Age: 30 Posts: 1,890 Trader Rating: (31) Feedback Score: 31 reviews	my wideband is right before my test pipe as well. what angle is it at? if its below 3 or 9 oclock condensation could be fucking up your readings. 18 afr at idle? it should be struggling to stay alive. i made my mistakes on nistune with my ka and it would barely stay alive if it got that lean at idle

07-20-2013, 08:55 PM	#12
S13alldayyo Zilvia Addict Join Date: Mar 2012 Location: Florida Posts: 653 Trader Rating: (3) Feedback Score: 3 reviews	Its like at 3 o'clock

07-20-2013, 08:57 PM	#13
S13alldayyo Zilvia Addict Join Date: Mar 2012 Location: Florida Posts: 653 Trader Rating: (3) Feedback Score: 3 reviews	Its on the upper half for sure

07-20-2013, 09:14 PM	#14
mr.nismo. Nissanaholic! Join Date: Feb 2012 Location: Oxnard, CA Age: 30 Posts: 1,890 Trader Rating: (31) Feedback Score: 31 reviews	what wideband do you have?

07-21-2013, 12:37 AM	#15
S13alldayyo Zilvia Addict Join Date: Mar 2012 Location: Florida Posts: 653 Trader Rating: (3) Feedback Score: 3 reviews	Aem wideband

07-21-2013, 11:02 AM	#16
mr.nismo. Nissanaholic! Join Date: Feb 2012 Location: Oxnard, CA Age: 30 Posts: 1,890 Trader Rating: (31) Feedback Score: 31 reviews	Stock sr idleing at 17-18? Something's not right. Have you tried recalibrating the wideband?

07-21-2013, 11:06 AM	#17
S13alldayyo Zilvia Addict Join Date: Mar 2012 Location: Florida Posts: 653 Trader Rating: (3) Feedback Score: 3 reviews	Aem doesnt need recalibrating

07-21-2013, 02:49 PM	#19
Beemer Leaky Injector Join Date: Sep 2007 Location: regina,sask Age: 35 Posts: 94 Trader Rating: (0) Feedback Score: 0 reviews	My sr20 idled at 16:1-and maxing out the gauge and it ended up being a vacuum leak. It was barely running. When I bottomed out my sensor hit what ever i bottomed out and was damaged,its reading were really lean and it never read past 14:1. Maybe you have a damaged senor.I use aem ugeo.

07-21-2013, 08:11 PM	#20
S13alldayyo Zilvia Addict Join Date: Mar 2012 Location: Florida Posts: 653 Trader Rating: (3) Feedback Score: 3 reviews	I dont want to buy a sensor and ends up reading the same lol, all i know is that my car idles perfect and has no lag throghout rpm range

07-22-2013, 01:43 PM	#21
mr.nismo. Nissanaholic! Join Date: Feb 2012 Location: Oxnard, CA Age: 30 Posts: 1,890 Trader Rating: (31) Feedback Score: 31 reviews	then your gauge is lying to you. theres no way it idles at 17-18 and is perfectly fine. i didnt get an AEM because of stories like these.

07-22-2013, 04:23 PM	#22
nickauger Leaky Injector Join Date: Sep 2008 Location: Quebec city Posts: 121 Trader Rating: (2) Feedback Score: 2 reviews	Buy a innovate motorsport wideband !