psi on the sr20 factory turbo

[mofo240]

me and this guy keep debating about how much psi the factory turbo on a sr20 puts out says near 16 but i think he is wrong. if u can tell me i appreciate it.

[JasonNagra]

I believe the stock S13 SR has 7 lbs boost. In terms of max boost on stock setup I think 14 lbs is safe.

[Steeles]

your arguing the wrong things. you can crank the turbo to 30psi but its not doing anything worthwhile that high. what you should be arguing about is where the efficiancy range on the stock T25 runs out. which is somewhere around 15psi (some say 14 some say 16)

[240silvia]

7lbs is stock. It can go up to 16 and still kinda have a purpose, but I'd say that 15 is as high as I would go. Stock injectors knock out at 12lbs without air/fuel management.

[DudeYourSoOOJDM]

It's funny to see how people react to "safe boost" questions.

You'll have the people that will run 9-10 just to be safe...and you'll have those that will crank it up because they hear 14lbs it's "ok"

there are a few other factors.....

Some people are maxing out their MAFS at like 10lbs.....

Some people run 90% plus duty cycles w/ like 10lbs.......

you could have a dirty fuel system leading to clogged injectors.....what if you have an aftermarket ECU you dont know about?

......sometimes you can never know.....

[nrcooled]

That's very true. I dyno'd my car at 14lbs and my a/f was perfect. This is with stock injectors and stock FP...go figure:p

[DudeYourSoOOJDM]

Interesting nrcooled.....i've heard of that too.

Most people I know that run more than 10 have; FMIC, Fuel pump, and at least an AFC...

[DuffMan]

Originally posted by Steeles
your arguing the wrong things. you can crank the turbo to 30psi but its not doing anything worthwhile that high. what you should be arguing about is where the efficiancy range on the stock T25 runs out. which is somewhere around 15psi (some say 14 some say 16)
Haha, it wouldnt ever hit 30lbs, even if you disconnect the wastegate.

The best efficiency range of the T25 is actually already being exceeded at stock boost. And you can boost up to 14psi or more, but it wont even be able to hold it through to redline. The real problem is that it has to spin way too fast even at 14psi, and though you can do it, it will decrease the lifetime of the turbo significantly. No big deal though, blowing a t25 only decreases its value by like 50 bucks.

[mofo240]

thanks. i was arguin with him because he was talkin about turnin the boost up and puttin out 300hp out a stock sr20. and i was lookin at him as if he was smokin some crack.

[Steeles]

Originally posted by nrcooled
That's very true. I dyno'd my car at 14lbs and my a/f was perfect. This is with stock injectors and stock FP...go figure:p

yeah I really wished I'd gotten an A/F rate when I dynoed mine at 14psi. but it was a free dyno run.. :) so I cant really complain I guess. 7psi was plenty rich. I gotta turn it back down. with the temp drop its pushing higher already.

[Steeles]

Originally posted by DuffMan
Haha, it wouldnt ever hit 30lbs, even if you disconnect the wastegate.


yeah but I bet it'd sound cool as shit trying to spin 30psi!!

[DuffMan]

yeah, its kind of tempting to try just to see what would happen :D

[Steeles]

hehe maybe I'll try it before I slap this new turbo sitting on my desk on. although when I was setting up the HKS wastgate actuator for 14psi (a trial and error process) I had it up to 21psi. but I backed out the second it ran over 15 and was like WHOAH

[steve shadows]

Lets clear a cople things up here for the tards....

jason your wrong... most of you are wrong...if you dont own an sr20det and the only one youve been around is your friends who you stabbed in the back dont go around giving advice on them.

heres a couple of things to remeber kids...

1. The sr20det stock boost is dependent on one thing only and that is the condition of the stock internal wastegate actuator. Ive done swaps where the wastegate actuator is a mess or is old and only allows 5-6 psi of boost and i have seen that are stiffer and will go to 7-8. the factory spec is 7 psi. It is also typical of the internal gates to spike.

2. The sr20det REDTOP and BLACKTOP kouki motors utilized a 86 ar t25 turbocharger with a horridly inefficent compressor wheel map that has a peak power output around 6k rpms on the 2 liter 86mm by 86mm stock sr20det. This turbos make efficiency is around 1 bar at max or 14.7 psi. When you go over 15.0 psi you are only increasing the turbine wheels velocity and increasing exaust temp and intake temps and could potentially cause detonation. I have seen stock turbos over boost and spike to 25 psi and not break but you are only losing hp after the 1 bar mark.

3.the stock injectors are maxed out at approx 12.5 psi on pump gas for the sake of safe runing conditions and no detonation. 90% duty cycle doesnt mean you are safe and still cannot experience detonation. here are the best ways to safe gaurd and make the most hp out of an sr20det with elevated boost.

-get a adjustable fpr. they are about 75 dollars to 130 dollars from tomei or hks. Most bolt right onto the stock fuel rail, get a fuel pressure gauge for it and set the fuel pressure at idle to 50psi

MAKE SURE YOU HAVE REPLACED YOUR FUEL PUMP WITH AT LEAST A 225LT/HR FUEL PUMP, 255 recomended i use a 295lt/hr denso unit in my car as well as customers cars...

-Get a s-afc I or II and get a z32 aif flow meter change the input to 2 in 6 out instead of stock 6 in 6 out and get a greddy air fuel ratio gauge that is basically like a wideband tuning device you can even do some base tuning over the fuel map on the afc with this setup.

this setup with a STOCK t25 turbocharger allowed an sr20det to run a [email protected] mph with dot legal drag radials, the car is set up for road racing and is currently sitting on tien hes with strut tower braces, rear ladder bar, etc. The 60ft wasnt even that great thanks to the rough suspension it was a 2.0...

be safe, and be nice to the sr

-steve

[JasonNagra]

Originally posted by rpsports
Lets clear a cople things up here for the tards....

jason your wrong... most of you are wrong...if you dont own an sr20det and the only one youve been around is your friends who you stabbed in the back dont go around giving advice on them.




HAHAHAHA! You're a joke. Anyway the stock S13 SR has 7lbs of boost. Not wrong there. Most people concur that somewhere close to 14lbs of boost (maybe 15 maybe 16) is safe on stock setup. Hmmmm, geuss Im not too wrong.

[DuffMan]

Originally posted by rpsports
blah blah blah
-steve


OMG! WORST ADVICE EVAR!!!

[Steeles]

wait..... what were we wrong about?

[JasonNagra]

I dunno!

[DuffMan]

I dunno either, but I cant count on one hand the wrong things in his post.:eek:

[Steeles]

Originally posted by DuffMan
I dunno either, but I cant count on one hand the wrong things in his post.:eek:

haha what trips me out is he didnt say anything that disputes a damn thing we said...

[JasonNagra]

I was hoping he'd come back and teach us all how we were wrong. Meh oh well!:rolleyes:

[steve shadows]

14psi is not safe on a "stock setup"

you need more fuel pressure(fpr), a bigger fuel pump, and preferably a fmic(to safegaurd against detonation and high intake temps) with an aftermarket bov.

if you dont belive me go try a completely stock sr swap with 91 octane and 15 psi...

this is why i dont post on zilvia normally

you guys are arrogant

and please point out any where in which my post is wrong in any way, id love to hear what you guys have to say about how wrong i am. I believe i quoted the ar specs for the t25 incorrectly i will admit that.

Btw the stock bypass valve will start bleeding boost out at about 9 psi...and the stock smic is worse than just having no ic at all. Ive done the dyno with air temp sensors in the piping when we were doing shakedown runs on our co2 cooling ic system, that stock ic is worse than no ic in a lot of situations.

oh and i didnt say ALL of you were wrong i was basically pointing out that certain people were being way too unspecific in their advice.

Its like saying bigger injectors will work great with a bigger turbo...that should work fine

but if you dont elaborate on all the hundreds of fine details that go along with that how are you going to give advice that will allow someone to have a good runing, clean , efficent and SAFE setup....

this is another reason why there are so many slow sr20det swaps rolling around. there are so many shops that think that they know what they are doing when they follow heavy throttle faq section and just hand it back to the customer with wires hanging everywhere and the ecu throwing codes and the customer doesnt know the diff..

its the attention to detail that allows a car to run and properly with only the small upgrades it has...

for ex. i saw a car tuned and swapped by a very reputable shop runing 1 bar at the drag strip runing 14.2s @ 98 mph. That is rediculous, our shops stock sr20dets roll out with stock smic upgraded fp and fpr and 1 bar pull worst times of 13.5s with crappy launchs at that. And the person behind the wheel of the car was very skilled laying down some very nice 60fts on open diff and shifting faster than our 13.5 driver...

-steve

[JasonNagra]

Originally posted by rpsports
...our shops stock sr20dets roll out with stock smic upgraded fp and fpr and 1 bar pull worst times of 13.5s with crappy launchs at that. And the person behind the wheel of the car was very skilled laying down some very nice 60fts on open diff and shifting faster than our 13.5 driver...

-steve

What shop do you speak of?

[steve shadows]

try reading

[Steeles]

Originally posted by rpsports

you guys are arrogant

oh and i didnt say ALL of you were wrong i was basically pointing out that certain people were being way too unspecific in their advice.
-steve

there is a difference between being unspecific and being wrong. your first post failed to convey that and as such YOU came off as arrogant. you wanted to clear it up for the tards.. we wanted to make them find the answers on their own. all this has been covered 1,193,857,329,348,342,343.5 times already. as you said they are all sheep blindly following whatever they read on the web. dont be a shepard make um learn.

[bob marley]

Originally posted by rpsports

2. The sr20det REDTOP and BLACKTOP kouki motors utilized a 86 ar t25 turbocharger with a horridly inefficent compressor wheel map...

Are you sure about that? I thought it was .80?

Johann

[steve shadows]

we were all tards once im just trying to help, being a humble tard doesnt mean you don't need help, being a pompus tard is another thing

i said in my last post that i was incorrect one only one thing to my knoweldge in the origonal post and that was the ar spec of the t25. it is .80 ar thanks for clearing it up.

-steve

[bob marley]

Originally posted by rpsports
we were all tards once im just trying to help, being a humble tard doesnt mean you don't need help, being a pompus tard is another thing

i said in my last post that i was incorrect one only one thing to my knoweldge in the origonal post and that was the ar spec of the t25. it is .80 ar thanks for clearing it up.

-steve

I think the 86 you got was from the GtiR turbo.

Johann

[bl200sx]

hummmmmmmm.........ya, well there are many ways to tune a car, most seem to think you can tune your car just like somebody else had tunned there car, with the same setup, and be good to go, there is only one safe way to see how safe your setup is, or how much boost you can run, and be safe with it, take it to a DYNO!!!!!! have the EGT's checked, or buy a wide band O2, watch your Exhaust temps, this should be your first mod done to your car, next get a Techtom check your duty cycle on the injectors, and your volts on the MAF.

[DudeYourSoOOJDM]

Next RPS is gonna teach us how to pull the wheels in his s13....cuz he means to....


and if we make him madder, he's gonna threaten to stab us w/ a machete like he did on FA.

He is well known for blabbing on and on making no sense.....I still think of him as DETrimental, or DETeatsvipers, or kid w/ a big mouth.

[JasonNagra]

ROFLMAO!!!!!!!!!!!!!!!!!!!!!!!!


HEY! You remembered??? HAHAHA! Ya hes changed screen names often, but its the same guy.

[steve shadows]

Riiiiight, im just a complete moron who has no idea what he is doing, wow im just flat crazy, and all of my customers who are soo happy and lucky to have come to me after they were raped on ghetto swaps with everything wrong that i have had to go over their setups with a fine toothed comb and charge them next to nothing for it believe that i am a retarded kid with a big mouth too, once again pure arrogance, hope you bring your fast ass daily driven s13 hypershift. Ill be at idrc in palmdale racing in novemeber in my slow daily driven 12.20 car that runs on pump gas with 100% stock engine...

Your sooo right I a compelet supid retard please don't listen to anything ive said, blow up your car, and then youll be the guy who end up calling me to have your sht rebuilt by me...

And jason im still waiting for an apology for the things you said about me and all of the sht that you constantly talk behind my back with nothing to back it up...Im still waiting for the apology for making light of the fact i was jumped from behind by 9 men and beaten by them in a parking lot, then afterwards came straight to you before i even went to the hospital to help you because you locked your keys in your car... I obviously was always there to help and now you resort to calling me names and acting arrogant

thanks your a person anyone could put their trust in :mrmeph:

[JasonNagra]

Originally posted by rpsports
Ill be at idrc in palmdale racing in novemeber in my slow daily driven 12.20 car that runs on pump gas with 100% stock engine...

Your sooo right I a compelet supid retard please don't listen to anything ive said, blow up your car, and then youll be the guy who end up calling me to have your sht rebuilt by me...

And jason im still waiting for an apology...


Wow, a COMPELTELY 100% STOCK SR that runs a 12.20 on pump gas?!?!?! You are clearly GOD.

Apology from me? You're a joke I dont even like you! I don't give a shit about you or your car. Your not my friend, stop being arrogant.

[sykikchimp]

Take your beefs off the forum. Either stay on topic, or it closes.

[mofo240]

yeah im with sykikchimp on that. all i wanted to know was an answer to a question i couldnt answer cuz i suck at knowing this kind of stuff.:D