11psi on stock setup.. bad??

[kppk1986]

Is it really bad when you run 11psi on a stock sr20 every once in a while???

[Hijacker]

you can safely run up to 14 psi

[VitaminT]

you can safely run up to 14 psi

I would suggest a FMIC for that.

[ride4lame]

you can run more then 14, i have heard 15 daily drivenyou can probly push more just haev to watch your air fuel ratio...

[180fan]

1bar on s15 smic maybe

0.8bar on s13 or s14 max for daily driver. 1bar at certain instances but not the whole day.

[Hijacker]

you can run more then 14, i have heard 15 daily drivenyou can probly push more just haev to watch your air fuel ratio...

15 is the limit. After that the compressor can't keep up with the demand. You don't really need to watch your air fuel ratio, because the car's stock map is on the rich side anyways. I do 14-15 daily on my T-25 and have had no issues arise from boosting that much all the time.

[kppk1986]

But do you guys boost like that with out changing out things like your fuel pump, and injectors??

[vboyq]

definitely need like a walbro pump at least if youre doin that on t25 or t28, depending on the condition of your stock pump its just gonna crap out on you

[compression]

You are way out of the efficiency range if you are pushing the stock T25 over 12psi. The pressure in the exhaust manifld is getting way up there and that little compressor is working its *** off.Anyway, the most boost I can run on my T28 turbo with 370cc injectors is about 11 psi. Thats at 11.5 AFR. Any higher and the duty cycle of the injectors goes way too high (95% and more). I even had them running 100% duty at 13psi. At 11 psi the fuel pressure is at 51psi. With new injectors (550cc) I am planning on taking it up to about 17psi or so for max boost runs.I have seen that the stock ECU keeps an AFR about 12. I think I can lean mine out a little to 12 from 11.5 and reduce the duty of the injectors and maybe run some more boost.

But 15psi on the stock turbo? are you nutz? I would not push that thing past 12psi if you want any life out of it.

[180fan]

that and the fact that at 1 bar you've already maxed the injectors...

[Hijacker]

1 bar is 14.5 psi.

[S13240]

11 psi all day everyday is fine.

[dj_lennon_franz]

I would suggest a FMIC for that.

not necessary...SMIC can handle 20+ psi...DSMs run 15-22psi all day long on SMICs and its the same size turbo pretty much (cept for the 14b but well excuse that one)

its a good idea to get a FMIC to run higher boost...alot more breathing room for the turbo...but from the people ive talked to about the SMIC ull be fine...i dont recommend upgrading to a FMIC until you get an upgraded cooling system as the FMIC will block ALOT of the air flow to yer radiator

[vboyq]

interesting i haven't heard that before.. not to say that its' not valid or anything

[msaskin]

He's sort of right. The problem with the stock SMIC is that it will heatsoak after 1 hard pull, at which point it basically becomes useless until it cools down again. an FMIC is going to last longer before heatsoaking.

Also, you don't need to upgrade your cooling system to run an FMIC. I have the STOCK radiator, STOCK clutch fan, and STOCK fan shroud, and have not had one problem with cooling, and that includes track time in our 100 degree plus weather here in Las Vegas.

~matt

[SoCalS14]

Wow...I have a FMIC, Walboro, S15 Turbo and I was told not to take past 10psi...what do you guys think?

[PalmerWMD]

Most seem to agree that up to 14 psi is ok even on stock injectors on a T25, if you have an upgraded fuelpump (like a walbro255) and a FMIC.

For my part I try to support the overworked T25 as much as I can, with a turbo timer, Mobil1 and a Greddy oil pan.

Plus if it ever goes its not such a huge deal to me I'll just replace.

Fred..

[S13240]

Wow...I have a FMIC, Walboro, S15 Turbo and I was told not to take past 10psi...what do you guys think?

You're just going to have to look at your a/f ratio with a wideband and injector duty.

[SoCalS14]

HMM...sounds like I need some sort of fuel computer...Time to start saving for a Power FC!

[dj_lennon_franz]

He's sort of right. The problem with the stock SMIC is that it will heatsoak after 1 hard pull, at which point it basically becomes useless until it cools down again. an FMIC is going to last longer before heatsoaking.

Also, you don't need to upgrade your cooling system to run an FMIC. I have the STOCK radiator, STOCK clutch fan, and STOCK fan shroud, and have not had one problem with cooling, and that includes track time in our 100 degree plus weather here in Las Vegas.

~matt

if you actually DROVE yer car then it would over heat...just wait till u hit streets of willow...ur going to officially hate life after 1-2 laps of full open throttle...but what do i know...yer the all knowing god of S13s right???

[msaskin]

if you actually DROVE yer car then it would over heat...just wait till u hit streets of willow...ur going to officially hate life after 1-2 laps of full open throttle

Hmmm...I guess the fact that I didn't overheat once during 4 x 30 minute hot-lapping sessions at the LVMS club course last week was just a fluke then, right?

You really need to avoid running your mouth regarding topics you know nothing about. It pretty much makes you look like an idiot.

but what do i know...yer the all knowing god of S13s right???

Nope. I'm the all knowing god of DSM's. I'm getting there with 240's though, just give it another month.

~matt

[PalmerWMD]

I apologize to the orginal poster but since this thread has deterioted some I will lock it.

Fred..