Safe boosting PSI T28?

[Lucas180]

Hey guys..just a question i have about boosting..ive had my SR for a over a year just running stock 7 PSI of boost red top SR with a T28 from a black top sr and the intercooler is just stock sidemount.

car also had 580cc injector ..and a nismo FPR that as far as i know ..is really doing nothing at stock PSI..

so tonight i took off the vacumme line as did a few pulls at 20 psi.. just i guess letting the turbo go on its own..

im wondering im pretty sure its not smart to do that but now im looking at manual boost contrllers to run the car at what i think is safe psi of 14?

what am i going to be wearing out faster with a higher PSI whats working harder to get this ..ect

also should i adjust the BOV spring if i go higher PSI i have a greddy type R .


sorry id this post is a bit disorganised but i think you get the idea..

[fliprayzin240sx]

Wait...20 psi on a stock side cooler?!?! Sell the car and go buy an NA car before you blow the engine up. 14 psi, the turbo is pretty much at its maxed efficiency. Anything more than that, you're just pushing hot air into the engine. Having a side mount makes its worst. Having no tuning turns your engine into an airpump. Airpumps like to give you rod knocks or worst, give you a new oil drain on the side of the block when the rods blow up.

So again, 20 psi with no tuning on a stock engine with no tune...sell the car and get an NA before you blow it...

[NiSmOKnIghTsRBS14]

Wait...20 psi on a stock side cooler?!?! Sell the car and go buy an NA car before you blow the engine up. 14 psi, the turbo is pretty much at its maxed efficiency. Anything more than that, you're just pushing hot air into the engine. Having a side mount makes its worst. Having no tuning turns your engine into an airpump. Airpumps like to give you rod knocks or worst, give you a new oil drain on the side of the block when the rods blow up.

So again, 20 psi with no tuning on a stock engine with no tune...sell the car and get an NA before you blow it...


+++++++++++++1

P.S your lucky it didnt blow up at 20 psi....

[Sileighty_85]

Wait...20 psi on a stock side cooler?!?! Sell the car and go buy an NA car before you blow the engine up. 14 psi, the turbo is pretty much at its maxed efficiency. Anything more than that, you're just pushing hot air into the engine. Having a side mount makes its worst. Having no tuning turns your engine into an airpump. Airpumps like to give you rod knocks or worst, give you a new oil drain on the side of the block when the rods blow up.

So again, 20 psi with no tuning on a stock engine with no tune...sell the car and get an NA before you blow it...

agreed,

your also running the risk of running lean and welding the pistons to the cylinder walls. Not to mention blowing you head gasket (if the engine doesnt already have a metal one)

Seriously though why the hell would you think that was ok? fuckin kids buying and fucking with shit they dont understand.

you should unplug an injector or two and run it, you'll save gas that way

For you questions, Do some research here everything been covered hundred of times.

[mayco_86]

+++++++++++++1

P.S your lucky it didnt blow up at 20 psi....

Yea listen to this guy he already went through all that. LOL JK BAHHH!!!!

[240sxxs]

SR20 Motor can handle The boost Safely and reliable only at 13-15 Psi...whatever after that point..say good bye to ur piston..cause it will melt like caramel

[fliprayzin240sx]

SR20 Motor can handle The boost Safely and reliable only at 13-15 Psi...whatever after that point..say good bye to ur piston..cause it will melt like caramel

See what youre saying is partially true, technically, the SR cant be reliable for more than 10 psi. Thats assuming everything is stock and you didnt do anything else to it other than crank the boost.

You can make these engines dependable and handle alot of power, record on a stock engine hp wise is over 600hp. But thats the thing, thats with the correct supporting mods and proper tuning. Just start cranking the boost by disconnecting the vaccum line into the wastegate will not make that engine last.

[zenki.life]

reliably 6-8. and im being a complete realist.

[Lucas180]

alright thats what i thought its not good for the engine...it was only for about 10 minutes just drive around the block a few times casue i know its not safe..

but maybe 10 is safe. on stock with no tune.. is what your saying.?

[lflkajfj12123]

lol you drove around the block like that at 20 psi probably doing pulls

bwahaha

you're a genius

do not touch the boost

[Lucas180]

im making myself sound so stupid on here..lol you all probly think i just bought my car with a sr and know nothing..not true i put the sr in and learned quite a bit about stuff but have never played with boost the only reason i did last night is casue a friend came over and showed me how to but i really dont think its a safe way.


so yeah its back to stock 7 PSI now..but i felt that 20PSI and i want that power..or at least some of it ..but i want it safely to not break the engine or blow the turbo..

i was gonna get a manual boost controler and a fmic..would it be safe to use 14 PSI like that ?

[240sxxs]

See what youre saying is partially true, technically, the SR cant be reliable for more than 10 psi. Thats assuming everything is stock and you didnt do anything else to it other than crank the boost.

You can make these engines dependable and handle alot of power, record on a stock engine hp wise is over 600hp. But thats the thing, thats with the correct supporting mods and proper tuning. Just start cranking the boost by disconnecting the vaccum line into the wastegate will not make that engine last.

yea bro i totally know what you are saying ..but my SR are build..so i prob take my point of view to talk to him..cause i forgot his motor is stock...but here the list of my mod

S14 SR20DET (rebuilt 10k miles ago)
Power FC D-Jetro with hand controller
Forged aluminum pistons
Stage 3 272 Brian Crowler cams
Tomei Adjustable cam gears
Brian Crowler valve springs and retainers
Cosworth Head gasket
Circuit sports Rocker arm stoppers
Powdercoated valve cover Anthracite Candy Blue
HKS Blow off valve
Koyo Radiator
Large Front mount intercooler
Taka Steel Braided Turbo lines
HKS 3" Hi-Power exhaust
Exedy stage 2 clutch
Exedy flywheel
Agency boost controller (never installed)

[stimracer]

Wow, this is good information for me to know whenever I get my SR built and swapped in. I just planned on tuning to around 10psi just to be safe. I want an SR that'll last. Good luck tho lucas!

[0wn3r]

right when you put those injectors in you should have gotten it tuned for higher boost...along w/ getting rid of that stock sidemount as already mentioned. you're right, the fpr isn't needed for your setup.

you can't just put injectors in and turn up the boost and think the computer will know what it's doing. When it sends the signal to fire the 370cc injectors, it doesn't realize it's firing the "580cc's" you have in there. so if it throws more gas you think that adding 10 to 20 psi will balance the rich mixture throughout your entire rpm range / throttle input?

i can't imagine how you did the swap successfully and don't know this stuff...

[SILVIA_KIDs14.5]

i'd agree wit most ppl here but again the sr can handle boost don't sleep you guys its not the tune that he'd have to worrie about if you noticed he does have rather large injectors in there for one and two what kinda t28 you runnin it depends if its a stock one or not if its a s14 or s15 or if its a big t28 who knows but yes you can do so depending on what turbo it is you will heat soak rather quick but shouldn't blow anything up just have to make sure you get your self a front mount asap cuz your robbing your self of power other wise and can potentially do some damage to the engine

[SILVIA_KIDs14.5]

Wow, this is good information for me to know whenever I get my SR built and swapped in. I just planned on tuning to around 10psi just to be safe. I want an SR that'll last. Good luck tho lucas!
:stupid:

to note the sr when built properly will handle anything you throw at it just look at mazworx sr 1500wrhp i mean come on ppl search don't miss lead its not the boost you need to worrie about i've seen ppl and reliably doing so boost 25psi to 30psi on the sr all day doesn't mean its not gonna last if you don't take care of it and don't build it correctly then ya your gonna be the guy who just runs 10psi to be safe or you'll be the guy that blows his shit to kingdom come

[240sxxs]

I build my Sr From my friend most reliable reputator shop In ARIZONA called Fuled performance where they mostly speciallize in SR AND CA OR RB only...im sure mine can handle prob max too 20psi.. but not sure.. will insert 660cc sard injector and will be tune next week and let see what it put down ..

[rc1honda]

This thread is a failure. Steve Shadows sold a car here on zilvia that made over 500hp with the stock bottom end. The SR can handle a lot of power. There are a lot of things that go into building a reliable motor.

Buy a turbo that will be efficient for your power goals. Have the fuel system in place to feed all that boost. Have the proper engine managment. SAFC's are cheap, but standalone's make you car run like it just came from the factory. Supporting mods are essential as well. Quality parts. Wastegates, BOV"S, front mounts, throttle bodies, intakes, MAF's, injectors, cams and oil coolers the list goes on and on. All the ancillary stuff is what makes reliable power. Be thorough, do research. Never unplug the vac source from the wastegate. If your not sure, search or don't do it. 240sxxs your car should handle 20 psi no problem if you have the right tune and supporting mods. Head studs and a good head gasket most likely will need some cams to.

[fliprayzin240sx]

My only question is he said he got 580cc injectors. Who makes 580cc injectors?!?! Also, if he does have larger injectors and they fuel map is corrected for it, how is it tuned? Rom tune or by other means? If its not a rom tune, how is it "tuned"? Tuned for 7 psi since thats all it could run?

[0wn3r]

i'd agree wit most ppl here but again the sr can handle boost don't sleep you guys its not the tune that he'd have to worrie about if you noticed he does have rather large injectors in there for one and two what kinda t28 you runnin it depends if its a stock one or not if its a s14 or s15 or if its a big t28 who knows but yes you can do so depending on what turbo it is you will heat soak rather quick but shouldn't blow anything up just have to make sure you get your self a front mount asap cuz your robbing your self of power other wise and can potentially do some damage to the engine

:stupid:

to note the sr when built properly will handle anything you throw at it just look at mazworx sr 1500wrhp i mean come on ppl search don't miss lead its not the boost you need to worrie about i've seen ppl and reliably doing so boost 25psi to 30psi on the sr all day doesn't mean its not gonna last if you don't take care of it and don't build it correctly then ya your gonna be the guy who just runs 10psi to be safe or you'll be the guy that blows his shit to kingdom come

punctuation and paragraph-sized run on sentences ftw

[conrad_s13.5]

shit,......ive been on 14psi for about a year and a half now w/ fmic.

buuuuuuuuuuuuuut,.. i wouldnt think of turning it up anymore than that.

[240sxxs]

shit,......ive been on 14psi for about a year and a half now w/ fmic.

buuuuuuuuuuuuuut,.. i wouldnt think of turning it up anymore than that.

your lucky my firend:aw:

[Sileighty_85]

http://zilvia.net/f/tech-talk/194503-dyno-t28-r-t-sr-w-stock-ecu-maf-injectors.html

[Lucas180]

Okay let me explain in a little more detail

i bought a clip from a slivia with a redtop SR

40,000 k on it

i spent a bit more because it came with

S14 blacktop T28 stock turbo
unknown brand 580cc injector
Nismo FPR
M's intake
and the ECU has a switch on it witch i was told was for a 'fuel saver mode'
other then that i can only assume it was stock internals

the engine has this sticker
http://i5.photobucket.com/albums/y180/GTChampion/19-08-09_1727.jpg
Does ANYONE know what this is ?? K's ROM ?
also the injectors have a spacer on them :
http://i5.photobucket.com/albums/y180/GTChampion/19-08-09_1726.jpg
again no clue why it has that spacer..

ive driven and drifted this setup for the last year with no problems what so ever except having to change turbo gaskets and manifold.

full compression still great engine at 7 PSI never higher. engine now has about 60,000 k on it

i had the car on dyno with the switch both ways and no power differences either way.

anyways, i forget what im even asking to do anymore ide like to run more boost but i dont want to break anything pre maturly i guess my first step would be to get a FMIC before i even touch anything.

then maybe go to 10 PSI

damn 20 felt good though lmao.

[Lucas180]

anyone know ?

[flip3d]

11psi. do it.

S13 is 11.5 stock. I can't imagine the S14 SR being any different. T28 would explain the higher power output.

I'm so tired of seeing 7psi stock. The wastegate is set at 7psi. No one ever gets that nice little FACTORY boost solenoid.


This thread even says the safest is .8 bar which is 11.5 psi.

http://zilvia.net/f/tech-talk/194503-dyno-t28-r-t-sr-w-stock-ecu-maf-injectors.html

[Homer_Simpson]

11psi. do it.

S13 is 11.5 stock. I can't imagine the S14 SR being any different. T28 would explain the higher power output.

I'm so tired of seeing 7psi stock. The wastegate is set at 7psi. No one ever gets that nice little FACTORY boost solenoid.


This thread even says the safest is .8 bar which is 11.5 psi.

http://zilvia.net/f/tech-talk/194503-dyno-t28-r-t-sr-w-stock-ecu-maf-injectors.html
More like that's the first thing they tossed from their swap. I wired mine in and I'm enjoying it.

[Silverbullet]

since you have a Nismo FPR, what is your fuel pressure? If it is set higher than stock, some upped boost wont hurt. Your ECU has been retuned by someone, but they use different fuel in Japan, so it may or may not help.

Id be safe and get it all done right by getting an FMIC, and a proper tune.

[wangan_cruiser]

11psi. do it.

S13 is 11.5 stock. I can't imagine the S14 SR being any different. T28 would explain the higher power output.

I'm so tired of seeing 7psi stock. The wastegate is set at 7psi. No one ever gets that nice little FACTORY boost solenoid.


This thread even says the safest is .8 bar which is 11.5 psi.

http://zilvia.net/f/tech-talk/194503-dyno-t28-r-t-sr-w-stock-ecu-maf-injectors.html



i think i have that solenoid. but havent installed it.

[fliprayzin240sx]

Honestly, you'll never know what that ECU is tuned for. First off, do you have a larger fuel pump or stock? Need to upgrade that first if you want anything more boost wise. Then get an FMIC. You want to crank the boost up, get on a dyno or get a wide band o2 sensor and slowly tweak your boost up and see where it starts leaning up.

[S13 curtis]

i kinda dont know what you guys are talking about. u can run more than 14psi on a s14 t28 hell i was running 15psi on the t25.

right now i have a s15 t28 on my car and i took off the GT2871r and my car is tuned for a gt2871r with e-85 and im running the s15 turbo @ 20psi and hold 17-18 at redline and it feels a shit load faster than it did with the turbo at 14psi. it actually breaks traction bad from a second gear roll and on 14psi it wouldnt do that so that should tell you something.

[S13 curtis]

20 psi is fine jus have a tune injectors wideband and a fmic

[dongoesby]

20 psi is fine jus have a tune injectors wideband and a fmic

Jeez. Not a sr expert here but just reading this thread because I just swapped my ka to sr. I just want to say this guy is being ironic, or he just another guy who's turning up the boost on the stock motor until it blows up.

there are already a whole bunch of threads out telling you a safe boost for stock sr FOR FREE!! telling people to run 20psi is just non-sense. Of course it is "shit-load" faster, it is because you are leaning out, which means more air with less fuel to compress, and just one simple physic of fuel is also to lube your chamber, without it, you are asking to blow up your "shit-load" faster motor.

[cobras89]

i run 10psi daily and 14psi with my MBC turned up but i also have a walbro255 and fmic ive never had a problem with it. i also have an aluminum radiator for proper cooling the car has been running like a champ for a long time now. i dont consider myself lucky that i didnt blow anything because i know to raise the boost you need more fuel without more fuel your just an idiot. oh forgot to mention i am running the stock s13 redtop t25 turbo

[S13 curtis]

Jeez. Not a sr expert here but just reading this thread because I just swapped my ka to sr. I just want to say this guy is being ironic, or he just another guy who's turning up the boost on the stock motor until it blows up.

there are already a whole bunch of threads out telling you a safe boost for stock sr FOR FREE!! telling people to run 20psi is just non-sense. Of course it is "shit-load" faster, it is because you are leaning out, which means more air with less fuel to compress, and just one simple physic of fuel is also to lube your chamber, without it, you are asking to blow up your "shit-load" faster motor.


ok bro first off my sr isnt stock or near it and there isnt a safe boost to run on an sr there are people running 25+psi on stock bottom ends on this forum and its not a ka it can take 15+psi like its a walk in the park as long as you have the right fuel and fuel management. im running E85 on my car which is a pretty detonation resistant fuel. and i have 740cc injectors and my afr is @11.7 wide open. so for u who has jus switched over to an SR you should probly read a bit more,and when you can trap 114.6 with an S15 T28 come let me know.

[Big Zee]

More like that's the first thing they tossed from their swap. I wired mine in and I'm enjoying it.

I looked for mine, but it didn;t come with my swap :( same as the power steering bumpup relay when your at full lock :(

14+ is thin ice unless you've swappped your HG for a metal one and you have supporting mods isn't it ?

I have a hks adjustable wastegate and veilside racerom and I'm set at 14 :) very happy:D

do not unplug your vaccum line again though, friends dont let friends turbo's run wild:nono:

[sevenstar]

I safely run 15 psi on my car, i do however have fuel managed by a professionally tuned nistune setup, with the s15 turbo, 15psi is more than enough, especially on a stock headgasket, i recommend getting a front mount IC, and a nistune

[Big Zee]

Jeez. Not a sr expert here but just reading this thread because I just swapped my ka to sr. I just want to say this guy is being ironic, or he just another guy who's turning up the boost on the stock motor until it blows up.

there are already a whole bunch of threads out telling you a safe boost for stock sr FOR FREE!! telling people to run 20psi is just non-sense. Of course it is "shit-load" faster, it is because you are leaning out, which means more air with less fuel to compress, and just one simple physic of fuel is also to lube your chamber, without it, you are asking to blow up your "shit-load" faster motor.

umm fuel is atomized...how does it exactly lube the chamber if its no longer a liquid ?

is that not what oil is for son ?.

if you are lubing your cylinder walls with fuel, you are "washing" your walls, which leads to premature ring failure and your not making any decent power, but burning the gas like theres no tomorrow

[g6civcx]

I said it before and I'll say it again.

It doesn't matter if you just slap a bunch of parts together. The tune ties everything up and makes the whole thing work well together.

Sure, you can probably make a T28 push 20PSI... for about one or two minutes before your stock engine blows.

You have to build everything correctly to take the boost if you want to drive it more than one day at the track without doing a rebuild.

Someone please post the picture of the dollar sign sticker on the boost controller knob.

[g6civcx]

umm fuel is atomized...how does it exactly lube the chamber if its no longer a liquid ?

is that not what oil is for son ?.

if you are lubing your cylinder walls with fuel, you are "washing" your walls, which leads to premature ring failure and your not making any decent power, but burning the gas like theres no tomorrow

Lately, I don't know any more... :duh:

[S13 curtis]

umm fuel is atomized...how does it exactly lube the chamber if its no longer a liquid ?

is that not what oil is for son ?.

if you are lubing your cylinder walls with fuel, you are "washing" your walls, which leads to premature ring failure and your not making any decent power, but burning the gas like theres no tomorrow

lol you should teach that guy a thing or 2

I said it before and I'll say it again.

It doesn't matter if you just slap a bunch of parts together. The tune ties everything up and makes the whole thing work well together.

Sure, you can probably make a T28 push 20PSI... for about one or two minutes before your stock engine blows.

You have to build everything correctly to take the boost if you want to drive it more than one day at the track without doing a rebuild.

Someone please post the picture of the dollar sign sticker on the boost controller knob.

exactly. thank you. my motor is built among A 2871R set up on E-85. decided i was going to sell the car and took off the 2871 and put on an s15 t28 i had sitting around and had it re-tuned.

[g6civcx]

I remember one time someone forgot to hook up the wastegate on the T28 and boost spiked up to at least 20.

Lucky there was no damage, but the motor was tuned for 14PSI so it wasn't stock.