Dyno T28 R/T SR W/Stock ECU, MAF, Injectors - Page 2 - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

*steve shadows* · 05-28-2008, 03:28 PM

Quote:

Originally Posted by !Zar!

You run the sensor right after the turbo ala 02 location?

What happened to all that talk about running the wideband sensor 18" or whatever down stream from the turbo?

for 100 yards? or one dyno pull its fine if you have stock turbo elbow.

Otherwise put it AT LEAST 18 inches to 1 METER away from the turbine wheel.

If you can weld in a bung. But just for death check on engine you can shove it in the elbow (if you have the fat 02 thread) and check it for one or two pulls down the street.

It's heat that kills widebands, so you should use a heat sink if your using them for extending periods of time (ie daily driving, race track etc).

*!Zar!* · 05-28-2008, 03:46 PM

Hmm.

Ok.

<3

95KA-Turbo · 03-19-2009, 12:25 PM

I know this is an old thread, but I like it when I search for things to have all of the answers in one place.

I just got a baseline dyno for my S14 SR20 - which, as you know, has a 'T28' turbo and 370cc injectors factory.

Baseline dyno before the cams go in:

The red is ~14psi and the blue is ~12psi....the air:fuel is too shady on the 14psi so 12psi is were it is staying, haha. This is SAE corrected and on a dynojet dyno.

This is a stock S14 SR20 with HKS filter, random jdm tubular manifold, 3" elbow/downpipe/cat and Trust DD exhaust (for NA SR), as well as an Evo 8 intercooler mounted in front of the radiator for super short intercooler pipes.

From the looks of the a:f on the red top, the S14 MAF/ECU is better equipped for higher boost on the stock turbo at higher RPMs (which always seemed obvious to me but now it is documented proof).

*slider2828* · 03-19-2009, 12:58 PM

There is a thread in this section for 2871r's but has all the tech specs and thread you are looking for.... Man that looks a little lean at some points...

What part of the MAFS are you looking at? MAFS is measured in Voltage and thats what it is a measurement to meter air nothing more.... So in order to tell what your mafs is doing, you have to look at the Voltage for AirIn... which a dyno won't tell you.

ROIDMONKEY · 03-19-2009, 01:15 PM

what r u waiting to get injectors.. u got all the other mods and running 370cc!!! NOOOOOO go get 740cc NOW and a stand alone ecu

95KA-Turbo · 03-19-2009, 02:01 PM

S14 SRs come with 370s...the motor is stock (minus FMIC, intake and exhaust). I just always wanted to compare a S14 SR to a S13 with T28, and this thread had the S13 info so I was just adding the S14 stuff.

740s are overkill for my stock turbo/easy cams/basically everything I have on the car. I also can't afford stand alone right now, so I'll probably get e-manage and some S15 injectors and work with that.

*slider2828* · 03-19-2009, 02:05 PM

At 14 psi bro you are running close to 100% Injector Duty Cycle. that is what he is talking about... you should know better.... Bad example

ROIDMONKEY · 03-19-2009, 02:25 PM

Quote:

Originally Posted by 95KA-Turbo

S14 SRs come with 370s...the motor is stock (minus FMIC, intake and exhaust). I just always wanted to compare a S14 SR to a S13 with T28, and this thread had the S13 info so I was just adding the S14 stuff.

740s are overkill for my stock turbo/easy cams/basically everything I have on the car. I also can't afford stand alone right now, so I'll probably get e-manage and some S15 injectors and work with that.

not overkill AT ALL always more than u gonna need near future. u can always adjust for whatchu need dude.
i was running a T28(s15) with 740cc nismo. no problem. i made a bit over 300WHP

95KA-Turbo · 03-19-2009, 02:38 PM

I guess I should point out I run 10-12psi regularly and that the dyno was just to see what the air:fuel looks like. I don't believe my boost gauge is extremely accurate so right now it reads ~10psi, so I assume it could be 11 or 12psi (because when I take the boost controller off it reads 5-6psi rather then 7). On the dyno runs the boost gauge read 12psi and 14psi....so those numbers could technically be from 14 and 16psi. The face of my boost gauge is convex so it looks different from different angles....not ideal but I use it to make sure I'm running around where it should be - rather then spiking up at 20psi, etc.

Again to clarify, I don't run the car at 14psi! It would be a short lived motor otherwise. I just wanted to directly compare it to the red top in this thread.

*blksylv* · 03-24-2009, 04:16 PM

im also gonna be running an s13 sr w a t28 and how would 550s, z32 maf and a safc fair, dont really have enough cash for a standalone at the moment, would that be safe for the moment, i also have an aem wideband

*blksylv* · 03-25-2009, 08:49 AM

anyone......

G240 · 03-25-2009, 09:41 AM

You probably would be better of with the Stock MAF and low boost before trying to run a Z32 MAF untuned. I really don't know enough of the SAFC to say if it would compensate for the Z32 MAF. Better to be safe than sorry.

BTW are you tuning it yourself with the SAFC or having a tuner do it? Also do you have an upgraded fuel pump and a FPR? Just curious

*blksylv* · 03-25-2009, 10:08 AM

i would probably be doing it myself for the moment until i got a chance to hit a dyno with it, itll also have a 255 walbro on it, the safc will allow me to run the z32

G240 · 03-25-2009, 12:11 PM

How about a FPR?

If you feel comfortable messing with the SAFC and it WILL compensate for the Z32. I would think the only issue at this point is making sure you have enough fuel so that you don't lean out.

Good Luck.

*blksylv* · 03-25-2009, 12:24 PM

was goin to stick with the stock one but i was hoping the 550s and the walbro which the safc to manage it would suffice for the fuel for the time being

95KA-Turbo · 03-25-2009, 01:33 PM

I wouldn't run 550cc injectors on a SAFC. Get some S15 injectors, keep your stock MAF, and get it tuned on a dyno with the SAFC by someone who knows what they're doing.

When you say you want to keep your stock fuel pump, are you talking stock Silvia pump or stock KA pump? There's a pretty big difference there. The stock silvia pump should be fine with S15 injectors...but I'm not 100% sure on that because I have not been able to find the LPH rating on it.

G240 · 03-25-2009, 01:36 PM

Quote:

Originally Posted by 95KA-Turbo

When you say you want to keep your stock fuel pump, are you talking stock Silvia pump or stock KA pump?

He was referring to a Stock FPR.

95KA-Turbo · 03-25-2009, 01:41 PM

Oh, a stock FPR is fine. haha

*blksylv* · 03-25-2009, 10:22 PM

kewl thanx for the input guys

insanemaniac · 03-25-2009, 11:07 PM

Quote:

Originally Posted by 95KA-Turbo

I wouldn't run 550cc injectors on a SAFC. Get some S15 injectors, keep your stock MAF, and get it tuned on a dyno with the SAFC by someone who knows what they're doing.

When you say you want to keep your stock fuel pump, are you talking stock Silvia pump or stock KA pump? There's a pretty big difference there. The stock silvia pump should be fine with S15 injectors...but I'm not 100% sure on that because I have not been able to find the LPH rating on it.

SFP will get you in trouble, especially if its got some age and isn't running the best efficiency. If you are up grading to anything more then 340cc injectors get a tomei/walbro tomei easier to install...

Unless you have access to plenty of dyno time, wait to get all your hardware in before you get it tuned on dyno by someone who knows what they are doing, you won't regret it. the last thing you want is blow your motor when your doing something fun like a big slide or pedal to the metal on the back straight of a track =)

bik · 03-26-2009, 01:33 PM

wich one is a safe afr??

I have stock black top with stop t25, 255 fuel pump... when i rise to 14 psi it goes down to 11 psi tru the red line, my afr says around 12.5, i heard that is a good safe afr ratio is right?

i use mexican 91 octane fuel

is this safe? O_o

ps. my english sucks

95KA-Turbo · 03-26-2009, 04:16 PM

12.5 is safe - basically as long as it doesn't go too far over 13 for an extended period of time you'll be fine. Mine got into the 14s on 14psi on my S14 SR (I'm only state this because my picture is not working above because I maxed out my photobucket bandwidth for march, haha!)

T25s shit out at about 14psi, so it will only maintain it for a short period of time (but it gives you a nice torque curve, haha).

Your English isn't bad at all...you write better on the forum then some people I know write in school!

S13 curtis · 03-27-2009, 01:38 AM

Quote:

Originally Posted by bik

wich one is a safe afr??

I have stock black top with stop t25, 255 fuel pump... when i rise to 14 psi it goes down to 11 psi tru the red line, my afr says around 12.5, i heard that is a good safe afr ratio is right?

i use mexican 91 octane fuel

is this safe? O_o

ps. my english sucks

you might wanna grab a Safc and add some more fuel.

*blksylv* · 09-10-2009, 09:43 AM

well sorry for bringing a thread back from the dead but finally got the car dynoed yesterday and it made 267whp on a stock s13 sr with a s14 t28, nismo fpr,walbro 255, z32 maf, safc1,fmic and 3" exhaust. the afrs under boost were around 11.98 on 11.5 psi.

*Sileighty_85* · 09-10-2009, 09:55 AM

Quote:

Originally Posted by blksylv

well sorry for bringing a thread back from the dead but finally got the car dynoed yesterday and it made 267whp on a stock s13 sr with a s14 t28, nismo fpr,walbro 255, z32 maf, safc1,fmic and 3" exhaust. the afrs under boost were around 11.98 on 11.5 psi.

whats your injector duty cycle? more than likely its around 100%
Which mean your injectors will probably crap out soon

*blksylv* · 09-10-2009, 07:43 PM

Quote:

Originally Posted by Sileighty_85

whats your injector duty cycle? more than likely its around 100%
Which mean your injectors will probably crap out soon

honestly i dont know wat the duty cycle was and 550s and a tuned ecu are in the works at the moment. on 10psi it made 252 and the afrs were in the mid 10s low 11s

05-28-2008, 03:46 PM	#32
!Zar! Yeast Join Date: Nov 2004 Location: Bakery Posts: 13,786 Trader Rating: (23) Feedback Score: 23 reviews	Hmm. Ok. <3 __________________

03-19-2009, 12:25 PM	#33
95KA-Turbo Post Whore! Join Date: Jul 2005 Location: VA Age: 28 Posts: 3,360 Trader Rating: (19) Feedback Score: 19 reviews	I know this is an old thread, but I like it when I search for things to have all of the answers in one place. I just got a baseline dyno for my S14 SR20 - which, as you know, has a 'T28' turbo and 370cc injectors factory. Baseline dyno before the cams go in: The red is ~14psi and the blue is ~12psi....the air:fuel is too shady on the 14psi so 12psi is were it is staying, haha. This is SAE corrected and on a dynojet dyno. This is a stock S14 SR20 with HKS filter, random jdm tubular manifold, 3" elbow/downpipe/cat and Trust DD exhaust (for NA SR), as well as an Evo 8 intercooler mounted in front of the radiator for super short intercooler pipes. From the looks of the a:f on the red top, the S14 MAF/ECU is better equipped for higher boost on the stock turbo at higher RPMs (which always seemed obvious to me but now it is documented proof). __________________ My Blog - knoop.sumospeed.com

03-19-2009, 12:58 PM	#34
slider2828 Premium Member Join Date: Oct 2004 Location: San Francisco, CA Posts: 5,244 Trader Rating: (12) Feedback Score: 12 reviews	There is a thread in this section for 2871r's but has all the tech specs and thread you are looking for.... Man that looks a little lean at some points... What part of the MAFS are you looking at? MAFS is measured in Voltage and thats what it is a measurement to meter air nothing more.... So in order to tell what your mafs is doing, you have to look at the Voltage for AirIn... which a dyno won't tell you. __________________ Turn and Burn!

03-19-2009, 01:15 PM	#35
ROIDMONKEY Nissanaholic! Join Date: Jul 2007 Location: HollyFLORIDA Posts: 2,021 Trader Rating: (4) Rides Gallery: ROIDMONKEY Feedback Score: 4 reviews	what r u waiting to get injectors.. u got all the other mods and running 370cc!!! NOOOOOO go get 740cc NOW and a stand alone ecu __________________ TRUE thing: True ////OFFSET\\\\ is acheived without spacers Running on E85 570whp Precision 5862....laggy as fuck. hate it

03-19-2009, 02:01 PM	#36
95KA-Turbo Post Whore! Join Date: Jul 2005 Location: VA Age: 28 Posts: 3,360 Trader Rating: (19) Feedback Score: 19 reviews	S14 SRs come with 370s...the motor is stock (minus FMIC, intake and exhaust). I just always wanted to compare a S14 SR to a S13 with T28, and this thread had the S13 info so I was just adding the S14 stuff. 740s are overkill for my stock turbo/easy cams/basically everything I have on the car. I also can't afford stand alone right now, so I'll probably get e-manage and some S15 injectors and work with that. __________________ My Blog - knoop.sumospeed.com

03-19-2009, 02:05 PM	#37
slider2828 Premium Member Join Date: Oct 2004 Location: San Francisco, CA Posts: 5,244 Trader Rating: (12) Feedback Score: 12 reviews	At 14 psi bro you are running close to 100% Injector Duty Cycle. that is what he is talking about... you should know better.... Bad example __________________ Turn and Burn!

03-19-2009, 02:38 PM	#39
95KA-Turbo Post Whore! Join Date: Jul 2005 Location: VA Age: 28 Posts: 3,360 Trader Rating: (19) Feedback Score: 19 reviews	I guess I should point out I run 10-12psi regularly and that the dyno was just to see what the air:fuel looks like. I don't believe my boost gauge is extremely accurate so right now it reads ~10psi, so I assume it could be 11 or 12psi (because when I take the boost controller off it reads 5-6psi rather then 7). On the dyno runs the boost gauge read 12psi and 14psi....so those numbers could technically be from 14 and 16psi. The face of my boost gauge is convex so it looks different from different angles....not ideal but I use it to make sure I'm running around where it should be - rather then spiking up at 20psi, etc. Again to clarify, I don't run the car at 14psi! It would be a short lived motor otherwise. I just wanted to directly compare it to the red top in this thread. __________________ My Blog - knoop.sumospeed.com

03-25-2009, 09:41 AM	#42
G240 Zilvia Junkie Join Date: Jan 2008 Location: Houston Posts: 310 Trader Rating: (5) Feedback Score: 5 reviews	You probably would be better of with the Stock MAF and low boost before trying to run a Z32 MAF untuned. I really don't know enough of the SAFC to say if it would compensate for the Z32 MAF. Better to be safe than sorry. BTW are you tuning it yourself with the SAFC or having a tuner do it? Also do you have an upgraded fuel pump and a FPR? Just curious

03-25-2009, 12:11 PM	#44
G240 Zilvia Junkie Join Date: Jan 2008 Location: Houston Posts: 310 Trader Rating: (5) Feedback Score: 5 reviews	How about a FPR? If you feel comfortable messing with the SAFC and it WILL compensate for the Z32. I would think the only issue at this point is making sure you have enough fuel so that you don't lean out. Good Luck.

03-25-2009, 01:33 PM	#46
95KA-Turbo Post Whore! Join Date: Jul 2005 Location: VA Age: 28 Posts: 3,360 Trader Rating: (19) Feedback Score: 19 reviews	I wouldn't run 550cc injectors on a SAFC. Get some S15 injectors, keep your stock MAF, and get it tuned on a dyno with the SAFC by someone who knows what they're doing. When you say you want to keep your stock fuel pump, are you talking stock Silvia pump or stock KA pump? There's a pretty big difference there. The stock silvia pump should be fine with S15 injectors...but I'm not 100% sure on that because I have not been able to find the LPH rating on it. __________________ My Blog - knoop.sumospeed.com

03-25-2009, 01:41 PM	#48
95KA-Turbo Post Whore! Join Date: Jul 2005 Location: VA Age: 28 Posts: 3,360 Trader Rating: (19) Feedback Score: 19 reviews	Oh, a stock FPR is fine. haha __________________ My Blog - knoop.sumospeed.com

03-26-2009, 01:33 PM	#51
bik Zilvia Junkie Join Date: Aug 2003 Location: Mexico Age: 37 Posts: 338 Trader Rating: (0) Feedback Score: 0 reviews	wich one is a safe afr?? I have stock black top with stop t25, 255 fuel pump... when i rise to 14 psi it goes down to 11 psi tru the red line, my afr says around 12.5, i heard that is a good safe afr ratio is right? i use mexican 91 octane fuel is this safe? O_o ps. my english sucks

03-26-2009, 04:16 PM	#52
95KA-Turbo Post Whore! Join Date: Jul 2005 Location: VA Age: 28 Posts: 3,360 Trader Rating: (19) Feedback Score: 19 reviews	12.5 is safe - basically as long as it doesn't go too far over 13 for an extended period of time you'll be fine. Mine got into the 14s on 14psi on my S14 SR (I'm only state this because my picture is not working above because I maxed out my photobucket bandwidth for march, haha!) T25s shit out at about 14psi, so it will only maintain it for a short period of time (but it gives you a nice torque curve, haha). Your English isn't bad at all...you write better on the forum then some people I know write in school! __________________ My Blog - knoop.sumospeed.com

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