sacario175

I have a SR20DET S13 redtop on my 1995 240sx. I'm running 15psi with a manual boost controller. I have a 2 1/2" straight back exhaust. Intake. Walboro fuel pump. Down pipe. Front mount intercooler. Stage 3 clutch. Short shifter. 13lb light fly wheel. Do you guys think its safe to run this much boost. He said 10psi is fine. What do you guys think?

Garber

your turbo wont last long at that level but since 11psi is stock... its not a big deal

lok

yeah it will totally be fine.

7psi is stock.

without injectors, maf and tune your motor wont last long.

spools420a

10-11 psi is stock not 7

Also I'd be more worrried about your injectors duty cycle then breaking a turbo,Go buy some larger injectors/t28 turbo and a wideband and even a upgraded maf why your at it and be worry free or turn the boost down to 11psi or so it will be just fine.

lok

yeah it is totally 11

sacario175

10-11 psi is stock not 7

Also I'd be more worrried about your injectors duty cycle then breaking a turbo,Go buy some larger injectors/t28 turbo and a wideband and even a upgraded maf why your at it and be worry free or turn the boost down to 11psi or so it will be just fine.

What recommendations you guys have for large injectors that will work with a t28 turbo upgrade. What maf also. I forgot to mention they did a wideband on my car when they boosted it up to 15psi. Thanks

Options13

as of the moment im running 480cc (s15 injectors) and z32 maf, which goes pretty nicely with the t28...

as for engine management, in running enthalpy

bottxo

wait, a stock redtop s13 t25 setup runs 10 psi stock?
i thought it was 7psi?? where does that confusion come from?

so what is ideal psi for a T25, Ive heard 14psi is pushing the life of the turbo, Ive heard 14 psi is perfect for some.. what gives??

Gdimension told me 10psi is the most you should push for a stock t25..

spools420a

yeah it is totally 7.......off the wastegate spring.

spools420a

really depends on your future goals as to what injector size,If you plan on just running stock internals and dont plan on making over 350whp youll be just fine with some 550's but if you plan on making a build and running serious boost on a fully built motor then of course thats when the big dog injectors come into play or even port fueler,theres quite a few sites if you google how to match injectors to hp,rule of thumb is dont run more then 85% duty cycle and your injectors will stay alive for a loooooong time.Ill let someone else chime in on the maf Ive only been driving a sr for not even a month so Im still kinda fresh to it and it was a spontanous buy so that makes me a noob lol,Anyways someone correct me if I'm wrong on the maf but I believe it was the z32 maf was perfect for under 400 hp.Also the part where you said "they did a wideband on my car when they boosted it up" Is it still installed on your car?If not thats gonna be your new best friend when you start buying these parts and trust me it literally pays itself off by worry free sleep at nights let alone the insurence of a propper a/f ratio.

s14driver

Your running 15 lbs on your stock motor and your wideband isnt running lean? Dosent make sense to me...

sacario175

My car is running perfect...im just making shure

sacario175

Let me reword it. I got my car back on monday. The gasket was messed up on my turbo manifold. A new copper gasket was installed and manual boost controller was set at 15psi. A wide band was used and they said 15psi it will be great. Just need the help, so I hope this gives more details and I can get better educated on teh topic I dont want to mess anything up.....

bottxo

t25? that sounds like a lot of boost. Ive personally never seen anyone go past 12psi on a T25 for daily.

id imagine your turbo probably screams when it hits boost

buentellomma

i ran 13psi on my old motor with a t25 and factory side mount intercooler and my motor lasted about 4 months before i destroyed the pistons. im keeping it safe on my new sr with 7psi until i get bigger injectors and a mafs

VNG704

question is a repeat... search button man. 12-13psi. The turbo itself will be good for up to 15psi or so but your fueling won't support it.

sacario175

Well too play it safe I just ordered 550cc injectors, s15 turbo, and z32 maf sensor. Getting it next week.

nismolvr

Change exhaust to 3" ,turbos dont like resrictive exhausts.go max 12ps on t25,anything past 12 and turbo is working past it efficiency range .Save money for a wide band 02 sensor with gauge,head gasket ,Cams,better turbo, injectors ,maf ,tune,then turn up the boost.

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s14driver

Yea im running 13 psi on my t28 an its perfect on the wideband. Anything more will set u into the 13 on a.f

nismolvr

ive seen many sr20s sent to the grave ,because of this .Ambient air temp also has a big thing to consider.Running a t25 higher than 12ps1,stock injectors with Side Mount Intercooler living in Arizona and racing around on low octane gas.Will only shorten the life of your hard earned swap.Investing in a wide band and learning about correct a/f ratios @ mid through WOT is key to preventing detonation and the destruction of your SR.Always protect your investments.

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buentellomma

never been to arizona but i did live in alabama for 22yrs up until i left for the military and it was summer time when i destroyed my sr 6 years ago. i learned the hard way and it took 6 years for me to have the time and money to get it back on the road.

nismolvr

live and learned ,dont feel bad ,I blew up a t28 from s15 because I was using a HKS SSQV,It was opening too late causing turbo surge/flutter.I finally purchased a new one and switched over to Synchronic BOV and recirculated it .No more pigeon sounds .Best BOV .And no more ricky racer swoosh sound.Dont need added attention by the police here in Ca.

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