Boost question

[NINJAS14]

It could have already been posted before but Im going to ask it anyways.

Is it safe to run 12 psi boost on stock turbo without anykind of tune. Im boosting about .5 bar right now and I kind of want to up it, only if it is safe.

any info would help.

I also checked the solenoid to the wastegate, and I run .5bar whether the solenoid is attached or when its stuck straight onto the intercooler pipe. So Im pretty sure that the solenoid really has nothing to do with increasing the boost but with the solendoid attached I do hit full boost faster and stay at 12 psi for a longer period of time.

anyways thats just info that I wanted to throw out there.

is there anyone that is running 12psi with a completely stock setup?

[AndyCs13]

it will be ok, but not as safe as it would be tuned.

plus you'll make more power.


im assuming this is an sr since you didnt specify.

i made 180hp on stock boost and 225ph at 12 psi tuned w/ safc

thats on the same dyno. the weather was a bit different, but not 45hp different lol.

tune it!

[NINJAS14]

So safc is all you need? Damn.
hmmm.

yeah it is an sr. Sorry.

Did you dyno it without the tune and just let the stock ecu do all the fuel adjustments. And if that were the case is there a risk of blowing the motor.

[AndyCs13]

no i didnt.

there is always more risk when you are not tuned.

just tune it the right way. i kinda recommend a ecu flash or power fc, but thats a lot of money.

just get a safe tune, dont try to pull every horsepower you can out of it.

[drifter_for_life06]

i ran 11-12psi for almost a year on my s13 SR daily driver. side mount intercooler, nismo FPR, walbro pump was all I had. No issues at all.

[NINJAS14]

what kind of boost controller is everyone using. Does anyone have anything against mechanical boost controllers. I heard they were safer, and more consistent. I just wanna hear more feedback thats all for differnt products.

[Sileighty_85]

yes it fine, 14psi will be the max

I ran 10-11psi on a T28 and put down 265whp ran that for over 1 1/2 years

I ran a MBC on mine its was fine the only thing that sucks is when you have to adjust it you gotta pop the hood.

But search dude this stuff been covered so many times

[Monooxide]

I ran stock injectors, ECU and MAF for roughly a year and made 273 WHP @ 12.66 PSI.

[drifter_for_life06]

10psi on a homemade boost controller, stock side mount, stock injectors...basically everytihng was stock except downpipe and exhaust and a AEM air filter and I made 205whp...178whp on stock boost. Then upgraded to a Hallmann ES MBC and picked up 3whp at 10psi...why? i dont know

[AndyCs13]

I recommend an hks adjustable wastgate actuator for a boost controller on a stock sr.

its very consistent and easy to install. cheap as well

[NINJAS14]

I ran stock injectors, ECU and MAF for roughly a year and made 273 WHP @ 12.66 PSI.

Are you running a t28 as well.

[Monooxide]

Are you running a t28 as well.

Yep. S14 SR.

[godsmack]

i got a 14sr here in oki and for 2 1/2 yrs now been boosting at around 13psi on stock fuel and ecu. just got an hks actuator to up the boost. runs great and see's 7,000 rpm on a daily basis.

[Monooxide]

i got a 14sr here in oki and for 2 1/2 yrs now been boosting at around 13psi on stock fuel and ecu. just got an hks actuator to up the boost. runs great and see's 7,000 rpm on a daily basis.

:D Fun setup. I wish more people would have faith in running higher boost levels on the SR.

[godsmack]

ya the motors can handle more than the stock t28 can put out. just as long as you take care of the motor you're golden.

[Monooxide]

ya the motors can handle more than the stock t28 can put out. just as long as you take care of the motor you're golden.

Agreed. Have you dyno'd yours by chance?

[godsmack]

nah the last dyno here got shot down. my butt dyno predicts between 300hp and 325hp.

[AndyCs13]

nah the last dyno here got shot down. my butt dyno predicts between 300hp and 325hp.
your butt dyno needs re-calibration.

stock fuel and no tune? no way. especially not at 13 psi either.

im running a gt2871 @ 15 psi and i make a bit over 300 tuned w/ 550cc injectors and n62 mafs.

[Monooxide]

your butt dyno needs re-calibration.

stock fuel and no tune? no way. especially not at 13 psi either.

im running a gt2871 @ 15 psi and i make a bit over 300 tuned w/ 550cc injectors and n62 mafs.

He didnt say WHP... If he did indeed mean 300-325 Crank then he's very dead on. As I made 273 WHP @ 12.66 PSI on stock everything fuel and ECU related.

[AndyCs13]

aaah.

i didnt think about that.

:)

[drifter_for_life06]

i second the notion on HKS actuators. I just sold mine for no reason other than having to pay the bills. IMO best bang for the buck mod I had on my car.

[slider2828]

but seriously guys.... running at 12PSI or higher is just making your motor run hard... Sure you can run it, but doesn't mean it didn't get hurt. Heck I could run 14 psi with Injectors at 100% and yah it ain't going to blow.... but don't be cheap and use your head.... a rebuild is going to cost you more than that injector and a emanage or something

[Monooxide]

but seriously guys.... running at 12PSI or higher is just making your motor run hard... Sure you can run it, but doesn't mean it didn't get hurt. Heck I could run 14 psi with Injectors at 100% and yah it ain't going to blow.... but don't be cheap and use your head.... a rebuild is going to cost you more than that injector and a emanage or something

Leanest AFR I reached on my setup was 12.2:1 and this was measured at the tailpipe which is a little inaccurate giving a leaner reading.

For stock timing and a 12.2:1 AFR I felt pretty damned comfortable.

However the car no longer runs that setup but for 10~12 months it did.

[godsmack]

The motors stock can handle 20psi with no problems. That is with additional fuel though. You can run 100% duty cycle of your injectors and still the motor will love it. The only time an sr will get fucked up is if you tune it wrong which seems to happen alot. Use stock injectors boost 13psi and you can still have fun driving to the grocery store. Once you go above that plan on injectors, turbo, and a "good" tune.

[slider2828]

12.2 afr doesn't mean its safe.... Injectors were never meant to run 100% duty cycle... period or above 90% why? because its inconsistent and may burn out and take your engine with it....

There is NO injector builder that ever says its ok to run 90% injector duty cycle. But to each their own

Also what you can do on your motor isn't what he can do on his motor cause you don't know anything about the age and parts on his cars, compressions, etc.

[Monooxide]

12.2 afr doesn't mean its safe.... Injectors were never meant to run 100% duty cycle... period or above 90% why? because its inconsistent and may burn out and take your engine with it....

There is NO injector builder that ever says its ok to run 90% injector duty cycle. But to each their own

Also what you can do on your motor isn't what he can do on his motor cause you don't know anything about the age and parts on his cars, compressions, etc.

Yes, I agree injectors are not meant to be ran above 80~85% duty cycle. However people doing this, such as I should understand the risk and live up to the consequences.

I wasn't too worried about it. However I suppose I should put a warning label on my own experiences.

[slider2828]

Exactly....

[drifter_for_life06]

The motors stock can handle 20psi with no problems. That is with additional fuel though. You can run 100% duty cycle of your injectors and still the motor will love it. The only time an sr will get fucked up is if you tune it wrong which seems to happen alot. Use stock injectors boost 13psi and you can still have fun driving to the grocery store. Once you go above that plan on injectors, turbo, and a "good" tune.

:-/ Not so much


I also agree anytihng over 80-85% duty cycle is unnecessary and IMHO too risky. its not worth it when you can get a set of 440 or 550's for relatively cheap now

[godsmack]

:-/ Not so much


I also agree anytihng over 80-85% duty cycle is unnecessary and IMHO too risky. its not worth it when you can get a set of 440 or 550's for relatively cheap now

Stock injectors can handle 13psi, and yes going with higher injectors is better. I don't think that he's going to go 100% dc on his stockers anyway i was just putting it that way saying the motors can handle the pressure that he wants.

[drifter_for_life06]

wat i said not so much to was this:

The only time an sr will get fucked up is if you tune it wrong which seems to happen alot.

But either way, i doubt he'll run 100% D/C either, and i know the stockers can run 13psi..i did it for a little while til my MBC broke