SR20DET raising boost and ...??

For the RWD SR20DET cars! Sponsored by Wiring Specialties.
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Mathdes8718
Posts: 15
Joined: Sat Apr 26, 2008 8:19 am
Car: nissan 240sx 1995 and cadillac CTS 03

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hey guys I have been looking arround a bit at the setups that most of the guys have on zilvia and nico..

I was wondering if I had to upgrade my injectors to 550cc if I raised the boost up to 13psi on the stock T25?

Should i get an Apexi S-AFC?

And what kind of power should i expect from setup like this?

as of now i have :

3" downpipe3" straight pipe exhaustaftermarket turbo elbow(dont know the brand it came with the motor)FMIC (soon to be installed)and boost at 13lbsVLSD

the car is in storage right now and I can't get it out till the snow melts so i can't get it to any shops to see how much power it puts down to the wheels, but I am curious to see what you guys have to say! thank you!!


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mRodiek
Posts: 2153
Joined: Fri Mar 07, 2008 9:42 am
Car: Stock Hatch
Location: CHICangeles
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I think youll be fine with just a fuel pump & boost controller, but search around here before you go doin it.

FYI After 13-14psi the T25 runs outta power

S14toRPS13
Posts: 2333
Joined: Mon Apr 03, 2006 1:11 pm
Location: Back to CA

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You should be fine with the stock injectors. They would be close to maxing out though. I suggest you get an ecu tune but wait until you have more upgrade parts before you get the tune though ie, turbo upgrade, bigger injectors, Z32 maf.

goalguy02
Posts: 140
Joined: Fri Dec 28, 2007 2:35 pm
Car: '92 240

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I ran my t-25 at 13lbs for a while. You should atleast get a better fuel pump before hand. 13lbs is close to getting out of the efficiency range of the t25

Emperor_Tha
Posts: 834
Joined: Wed Nov 22, 2006 12:56 pm

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U should be fine with the stock injectors. The stock maf max out first before the injector. I safc tune people car and at 13+ psi the air fuel reads 12.5+13 with a fuel pump and a regulator. When I run my turbo at 14psi with a z32 maf and a safc set at zero I get 10.6 when full boost to redline.

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Mathdes8718
Posts: 15
Joined: Sat Apr 26, 2008 8:19 am
Car: nissan 240sx 1995 and cadillac CTS 03

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forgot to say i have a walbro 255lph fuel pump...i was just a little bit worried that my injectors wouldn't keep up with the rest..and power wise what should I expect from this kind of setup as for quarter mile times with brand new tires and HP/TQ wise? thanx a lot for your answers!!

S14toRPS13
Posts: 2333
Joined: Mon Apr 03, 2006 1:11 pm
Location: Back to CA

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You'll probably be around 230 to 240 whp. Depending on your suspension and tires, your car should be around mid to high 13's. Now if you're on stiff coilovers and all season tires, expect low 14's.

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redsx13
Posts: 748
Joined: Fri Aug 03, 2007 12:32 am
Car: 93 240sx 03 350z

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Mathdes8718 wrote:hey guys I have been looking arround a bit at the setups that most of the guys have on zilvia and nico..

I was wondering if I had to upgrade my injectors to 550cc if I raised the boost up to 13psi on the stock T25?

Should i get an Apexi S-AFC?

And what kind of power should i expect from setup like this?

as of now i have :

3" downpipe3" straight pipe exhaustaftermarket turbo elbow(dont know the brand it came with the motor)FMIC (soon to be installed)and boost at 13lbsVLSD

the car is in storage right now and I can't get it out till the snow melts so i can't get it to any shops to see how much power it puts down to the wheels, but I am curious to see what you guys have to say! thank you!!
you need some sort of engine management, then have it tuned and you will be golden.(do not turn up your boost anymore, if anything run it at 11-12 to be on the safeer side)

btw, if you are worried about your injectors, buy a fuel pressure regulator and up the pressure a little, its not great for your injectors, but its better than running lean.

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Mathdes8718
Posts: 15
Joined: Sat Apr 26, 2008 8:19 am
Car: nissan 240sx 1995 and cadillac CTS 03

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well right now im on KYB's and eibach shocks(came with the car) i am probably going to slam on some coils and good rubber for summer!! thanx for you advice guys its greatly apprceciated!!


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