S15 t28 turbo - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

mikey0129 · 12-03-2007, 03:56 PM

I search and didnt come up with the answers that i was looking for

how much faster is the s15 turbo compared to the stock t25

im talkin about just stock vs stock

will u be able to feel that much push and boost with the s15 turbo

or will it be not that much noticable diference

SHIFT_*grind* · 12-03-2007, 04:37 PM

The short version: It's a big difference.

If you want the long version, search harder.

azndoc · 12-03-2007, 04:48 PM

Oh man....

Search here and google.

So much info out there.

And it's a big difference.

And also there's different variations of the S15 turbos also.

Each different ones came off different models and aren't all the same.

I'm tired. Search....

mikey0129 · 12-03-2007, 04:50 PM

like i said i already tried searching and didnt come upt with and info on dis

JDS Performance · 12-03-2007, 04:54 PM

I will put it like this - you will need bigger injectors (more fuel) plus more air = a new tune - so yeah big difference - and yeah a good bit more $$ than you were thinking I am sure.

and if you start talking in slang - nobody will help you on this forum ("info on dis")

Silvia_S13 · 12-03-2007, 05:01 PM

the difference is big, and big is good. not 500hp big, but t25 is small.

chad_everson · 12-03-2007, 05:03 PM

You can run with s15 turbo, up the boost run the same injectors and will be fine still without a tune.. A tune yes will make some more power, but is not ness. to run the s15 turbo.

-Chad

mikey0129 · 12-03-2007, 05:04 PM

im talking about stock .... not upgrading any injectors or anything

mikey0129 · 12-03-2007, 05:05 PM

will i feel alot of diference just slapping the s15 turbo on?

chad_everson · 12-03-2007, 05:07 PM

yes you will feel difference in spool time, your powerband, and the amount of power you get.. Especially when you up your boost levels..

-Chad

mikey0129 · 12-03-2007, 05:07 PM

ok kool thx for all your help

Def · 12-03-2007, 05:12 PM

Do not run over 9-10 psi on a T28/S15 turbo without bigger injectors, MAF, and a tune or some sort - you WILL run lean much past that point. it was 11 psi towards redline when my stock MAF would max out.

chad_everson · 12-03-2007, 05:19 PM

I ran 1 bar with my s15 turbo on my s13 blacktop with only a fuel pump. It ran slightly lean but nothing to take notice of.

Def · 12-03-2007, 06:09 PM

Mine started going lean as soon as the MAF max'd out(obviously). I would NEVER recommend someone do that with their engine, as that's really playing with fire.

At 1 bar you were probably revving out for a good 2-3k RPM with the MAF max'd... I would take notice of that regardless of how well you think it drives. You take that thing out on the track or something and it will pop.

chad_everson · 12-03-2007, 06:57 PM

The maf did not get maxed out with it. We had it on our dyno and was checking it to find out. My tuner knows what he is doing. I Managed Intec Racing/Silk Road USA ( our s13.5 is driven by Haraguchi in FD under falken) our mechanics and tuners build motors for the street and for race use. With running my setup you would not have to worry about anything..

-Chad

Hooorahh! · 12-03-2007, 09:45 PM

its kinda like comparing a sr20de with a det .. big dif. i wouldnt go past 12psi if i were u w/o upgradeing fuel system .. 1 bar i seen it happen but u are pushing it a bit and it depends on how healthy ur motor is as well ...
i also hope u have a upgraded fuel pump regardless if ur gonna run a T25 or T28....

Size · 12-03-2007, 10:18 PM

the stock maf and the stock 370cc are garbage for this set up,unless you only want to enjoy a tiny difference.

remember there is a reason why the stock s15 motors comes with 480cc injectors,..

s15 turbo, 370cc,stock sohc 240/sr maf no more than 8psi ( if you want to keep your healthy motor) and wait till you upgrade your injectors and maf or managment with a tune.

s15 turbo , 550cc, z32 maf with tune 10psi- 20psi no prob, daily beat the shit out of and enjoy seeing your rear tires burn with 94 octane gas, bkr7e v groove NGK plugs works well.

usdm180sx · 12-04-2007, 12:30 AM

Quote:

Originally Posted by mikey0129

like i said i already tried searching and didnt come upt with and info on dis

You suck at searching

tymlesxrs · 12-04-2007, 01:06 AM

Gas makes a big difference. California crap 91 is pretty bad. You may be able to get away with 1 bar in the Northwest, but it could be a problem here in socal. With an S14 turbo on my redtop, I maxed the stock injectors before 6 grand at 12 lbs. I wasn't knocking, but caution should still be taken. Now that I got my 550's in, car feels much better.

BTW how are you Mr. Everson? Can't wait to see that finished project of yours...

ALEXTHESUS*PECT · 12-04-2007, 01:13 AM

ugrade fuel system or don;t buy one! you don;t wanna detonate!

Doluck · 12-04-2007, 01:58 AM

Quote:

Originally Posted by mikey0129

how much faster is the s15 turbo compared to the stock t25

Good question! Its NOT!! I just put both turbos side by side on the street outside and watched for 15 min, neither one moved I guess they are both slow.....

Size · 12-04-2007, 03:20 AM

slow snails huh!

LOL

chad_everson · 12-04-2007, 09:03 AM

So anyone on here that is saying that they maxed out their injectors on here actually put them on a dyno and find out or just thinking that they maxed out? With the stock fuel pump it maxed out. With aftermarket one the stock injectors are fine. I ran 370 injectors up to high high 200whp before getting maxed out on the duty cycle. With that setup the only problem I was running ito was the motor running a lil lean. The fuel system was handling it though. We did this just to find this question out. After we put a power FC on and tuned.

-Chad

mikey0129 · 12-04-2007, 10:40 AM

Quote:

Originally Posted by usdm180sx

You suck at searching

if u aint ganna help den dont talk

harangatang · 12-04-2007, 10:50 AM

Quote:

Originally Posted by mikey0129

if u aint ganna help den dont talk

LOL...
if We "AINT GANNA help DEN"... wtf??
ENGLISH, DO YOU SPEAK IT??
You could have easily found this answer on here or google. And You have already had your question answered, if you didnt notice..

Def · 12-04-2007, 11:23 AM

Quote:

Originally Posted by chad_everson

So anyone on here that is saying that they maxed out their injectors on here actually put them on a dyno and find out or just thinking that they maxed out? With the stock fuel pump it maxed out. With aftermarket one the stock injectors are fine. I ran 370 injectors up to high high 200whp before getting maxed out on the duty cycle. With that setup the only problem I was running ito was the motor running a lil lean. The fuel system was handling it though. We did this just to find this question out. After we put a power FC on and tuned.

-Chad

I had an AFC reading MAF voltage and a Consult readout - both said the MAF max'd out on 11 psi(this was at sea level on a 90 deg F day).

The stock injectors have a bit more headroom than the stock MAF does. Depending on your BSFC, the MAF is only good for ~250-270 rwhp.

chad_everson · 12-04-2007, 11:37 AM

Well, for some reason my maf did not get maxed out when we did it.

((sr)) kelly · 12-04-2007, 11:40 AM

2871r ftw.....................

burnsauto · 12-04-2007, 06:30 PM

Quote:

Originally Posted by ((sr)) kelly

2871r ftw.....................

kelly...shut up, lol.

+1 with most of the other guys on here..i wouldnt go past 9-10 lbs max on stock injectors and a maf.

if you're really serious about sourcing out an s15 t28...i'd go with the spec-r (IMO)

tymlesxrs · 12-04-2007, 07:53 PM

I maxed out the stock injectors on the dyno, hooked up to a laptop through Power FC D-Jetro, so the MAF sensor is not my concern. I do have a Walbro 255 pump as well, but still wasn't enough. I'm not saying that stock injectors can't handle, but I'm just saying make sure it does, if not, upgrade.

12-03-2007, 03:56 PM	#1
mikey0129 Zilvia Member Join Date: Oct 2005 Location: torrance Posts: 278 Trader Rating: (0) Feedback Score: 0 reviews	S15 t28 turbo I search and didnt come up with the answers that i was looking for how much faster is the s15 turbo compared to the stock t25 im talkin about just stock vs stock will u be able to feel that much push and boost with the s15 turbo or will it be not that much noticable diference

12-03-2007, 04:37 PM	#2
SHIFT_grind Nissanaholic! Join Date: Nov 2004 Location: NWA Age: 42 Posts: 2,066 Trader Rating: (7) Feedback Score: 7 reviews	The short version: It's a big difference. If you want the long version, search harder. __________________ My seller review thread

12-03-2007, 04:54 PM	#5
JDS Performance Zilvia.net Advertiser Join Date: Jul 2006 Location: Concord, NC Posts: 3,127 Trader Rating: (53) Feedback Score: 53 reviews	I will put it like this - you will need bigger injectors (more fuel) plus more air = a new tune - so yeah big difference - and yeah a good bit more $$ than you were thinking I am sure. and if you start talking in slang - nobody will help you on this forum ("info on dis") __________________ http://www.240SXTECHDVDS.org http://www.JDSPerformanceTurbos.com

12-03-2007, 05:01 PM	#6
Silvia_S13 Zilvia Junkie Join Date: Jul 2005 Location: SD Age: 39 Posts: 331 Trader Rating: (0) Feedback Score: 0 reviews	the difference is big, and big is good. not 500hp big, but t25 is small. __________________ sddrift.com - smirkis - poweredbymax.net

12-04-2007, 01:13 AM	#20
ALEXTHESUSPECT Post Whore! Join Date: Oct 2005 Location: Soul cal!! Age: 47 Posts: 4,387 Trader Rating: (5) Rides Gallery: ALEXTHESUSPECT Feedback Score: 5 reviews	ugrade fuel system or don;t buy one! you don;t wanna detonate! __________________ *TEAM SUSPECT**

12-03-2007, 04:48 PM	#3
azndoc Post Whore! Join Date: Feb 2006 Location: Los Angeles Age: 43 Posts: 9,487 Trader Rating: (47) Rides Gallery: azndoc Feedback Score: 47 reviews	Oh man.... Search here and google. So much info out there. And it's a big difference. And also there's different variations of the S15 turbos also. Each different ones came off different models and aren't all the same. I'm tired. Search....

12-03-2007, 04:50 PM	#4
mikey0129 Zilvia Member Join Date: Oct 2005 Location: torrance Posts: 278 Trader Rating: (0) Feedback Score: 0 reviews	like i said i already tried searching and didnt come upt with and info on dis

12-03-2007, 05:03 PM	#7
chad_everson Banned from the Marketplace Join Date: Jan 2007 Location: oregon Age: 41 Posts: 367 Trader Rating: (0) Feedback Score: 0 reviews	You can run with s15 turbo, up the boost run the same injectors and will be fine still without a tune.. A tune yes will make some more power, but is not ness. to run the s15 turbo. -Chad

12-03-2007, 05:04 PM	#8
mikey0129 Zilvia Member Join Date: Oct 2005 Location: torrance Posts: 278 Trader Rating: (0) Feedback Score: 0 reviews	im talking about stock .... not upgrading any injectors or anything

12-03-2007, 05:05 PM	#9
mikey0129 Zilvia Member Join Date: Oct 2005 Location: torrance Posts: 278 Trader Rating: (0) Feedback Score: 0 reviews	will i feel alot of diference just slapping the s15 turbo on?

12-03-2007, 05:07 PM	#10
chad_everson Banned from the Marketplace Join Date: Jan 2007 Location: oregon Age: 41 Posts: 367 Trader Rating: (0) Feedback Score: 0 reviews	yes you will feel difference in spool time, your powerband, and the amount of power you get.. Especially when you up your boost levels.. -Chad

12-03-2007, 05:12 PM	#12
Def Post Whore! Join Date: Apr 2004 Location: Houston, TX Posts: 2,701 Trader Rating: (16) Feedback Score: 16 reviews	Do not run over 9-10 psi on a T28/S15 turbo without bigger injectors, MAF, and a tune or some sort - you WILL run lean much past that point. it was 11 psi towards redline when my stock MAF would max out.

12-03-2007, 05:19 PM	#13
chad_everson Banned from the Marketplace Join Date: Jan 2007 Location: oregon Age: 41 Posts: 367 Trader Rating: (0) Feedback Score: 0 reviews	I ran 1 bar with my s15 turbo on my s13 blacktop with only a fuel pump. It ran slightly lean but nothing to take notice of.

12-03-2007, 06:09 PM	#14
Def Post Whore! Join Date: Apr 2004 Location: Houston, TX Posts: 2,701 Trader Rating: (16) Feedback Score: 16 reviews	Mine started going lean as soon as the MAF max'd out(obviously). I would NEVER recommend someone do that with their engine, as that's really playing with fire. At 1 bar you were probably revving out for a good 2-3k RPM with the MAF max'd... I would take notice of that regardless of how well you think it drives. You take that thing out on the track or something and it will pop.

12-03-2007, 06:57 PM	#15
chad_everson Banned from the Marketplace Join Date: Jan 2007 Location: oregon Age: 41 Posts: 367 Trader Rating: (0) Feedback Score: 0 reviews	The maf did not get maxed out with it. We had it on our dyno and was checking it to find out. My tuner knows what he is doing. I Managed Intec Racing/Silk Road USA ( our s13.5 is driven by Haraguchi in FD under falken) our mechanics and tuners build motors for the street and for race use. With running my setup you would not have to worry about anything.. -Chad

12-03-2007, 09:45 PM	#16
Hooorahh! Zilvia FREAK! Join Date: Jan 2007 Location: california Age: 45 Posts: 1,195 Trader Rating: (0) Rides Gallery: Hooorahh! Feedback Score: 0 reviews	its kinda like comparing a sr20de with a det .. big dif. i wouldnt go past 12psi if i were u w/o upgradeing fuel system .. 1 bar i seen it happen but u are pushing it a bit and it depends on how healthy ur motor is as well ... i also hope u have a upgraded fuel pump regardless if ur gonna run a T25 or T28....

12-03-2007, 10:18 PM	#17
Size Join Date: Jul 2005 Location: Montreal Posts: 37 Trader Rating: (0) Feedback Score: 0 reviews	the stock maf and the stock 370cc are garbage for this set up,unless you only want to enjoy a tiny difference. remember there is a reason why the stock s15 motors comes with 480cc injectors,.. s15 turbo, 370cc,stock sohc 240/sr maf no more than 8psi ( if you want to keep your healthy motor) and wait till you upgrade your injectors and maf or managment with a tune. s15 turbo , 550cc, z32 maf with tune 10psi- 20psi no prob, daily beat the shit out of and enjoy seeing your rear tires burn with 94 octane gas, bkr7e v groove NGK plugs works well.

12-04-2007, 01:06 AM	#19
tymlesxrs Leaky Injector Join Date: Mar 2007 Location: Irvine, CA Age: 42 Posts: 56 Trader Rating: (3) Feedback Score: 3 reviews	Gas makes a big difference. California crap 91 is pretty bad. You may be able to get away with 1 bar in the Northwest, but it could be a problem here in socal. With an S14 turbo on my redtop, I maxed the stock injectors before 6 grand at 12 lbs. I wasn't knocking, but caution should still be taken. Now that I got my 550's in, car feels much better. BTW how are you Mr. Everson? Can't wait to see that finished project of yours...

12-04-2007, 03:20 AM	#22
Size Join Date: Jul 2005 Location: Montreal Posts: 37 Trader Rating: (0) Feedback Score: 0 reviews	slow snails huh! LOL

12-04-2007, 09:03 AM	#23
chad_everson Banned from the Marketplace Join Date: Jan 2007 Location: oregon Age: 41 Posts: 367 Trader Rating: (0) Feedback Score: 0 reviews	So anyone on here that is saying that they maxed out their injectors on here actually put them on a dyno and find out or just thinking that they maxed out? With the stock fuel pump it maxed out. With aftermarket one the stock injectors are fine. I ran 370 injectors up to high high 200whp before getting maxed out on the duty cycle. With that setup the only problem I was running ito was the motor running a lil lean. The fuel system was handling it though. We did this just to find this question out. After we put a power FC on and tuned. -Chad

12-04-2007, 11:37 AM	#27
chad_everson Banned from the Marketplace Join Date: Jan 2007 Location: oregon Age: 41 Posts: 367 Trader Rating: (0) Feedback Score: 0 reviews	Well, for some reason my maf did not get maxed out when we did it.

12-04-2007, 11:40 AM	#28
((sr)) kelly BANNED Join Date: Jun 2007 Location: Zebulon... NC Posts: 1,035 Trader Rating: (6) Feedback Score: 6 reviews	2871r ftw.....................

12-04-2007, 07:53 PM	#30
tymlesxrs Leaky Injector Join Date: Mar 2007 Location: Irvine, CA Age: 42 Posts: 56 Trader Rating: (3) Feedback Score: 3 reviews	I maxed out the stock injectors on the dyno, hooked up to a laptop through Power FC D-Jetro, so the MAF sensor is not my concern. I do have a Walbro 255 pump as well, but still wasn't enough. I'm not saying that stock injectors can't handle, but I'm just saying make sure it does, if not, upgrade.