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View Full Version : what is safe boost to run in an sr20det?

gdrum
08-12-2003, 10:55 AM
What is safe boost to run in an sr20det? I run 1.0-1.1 bar when driving hard. Is that safe or what is it okay to take it to or not to worry about it. I just want it to last and want to know if im safe.
chirpnslide
08-12-2003, 11:16 AM
12.0 is safe a full bar is kinda pushing it to me but i do it anyway sometimes
Pudula
08-12-2003, 11:40 AM
Depends on the year...if it's an s14 blacktop you can safely run 15 all day, any kind of driving. For the track you can push 20+.
Fibercus
08-12-2003, 03:03 PM
WHat boost will the 370's last until? Im running stock boost right now, not going to turn it up until i install pummp & perhaps injectors but not sure
Pudula
08-12-2003, 10:58 PM
Originally posted by James
Safe boost = 7psi:doh: :D
So you are saying on my s14 blacktop, I'd have to turn it down 3 psi from stock boost to be safe. Wrong.
DudeYourSoOOJDM
08-12-2003, 11:06 PM
Most people believe 12lbs is pushing stock turbo. Some see duty cycle's in the 90%s at about 12lbs. I ran 10 just to be safe. Anything above that felt like I was blowing hot air.....moreso because I'm still on SMIC.
Fibercus
08-12-2003, 11:51 PM
Originally posted by Pudula
So you are saying on my s14 blacktop, I'd have to turn it down 3 psi from stock boost to be safe. Wrong.

cant trust the boards :D :p
Bill Roberts
08-13-2003, 12:03 AM
Range of 8 to 11 should be ok.




7 is safe. no doubt about that. Safe as in no matter what. Old speaks the truth actually..

I would not run a continuouis 14 to 17 on an engine past 60K miles unless I knew it had weekend oil changes.

Let me ask you. Has your oil ever been able to turn any color than tan? Has it ever been black?


When you look down the head cover, is it like brand new in there or are the parts dark and black?

I thought so.

I am the anti black oil dude.

I never let oil get darker than light tan..then it is out of there and I run N/A


Black oil means excessive wear. might as well have no oil at that point if it is my engine.
DudeYourSoOOJDM
08-13-2003, 12:11 AM
I change mine every about every 2200 miles....before it gets dark.
mbmbmb23
08-13-2003, 12:13 AM
Personally I wouldnt go above 10 lbs boost with a SMIC+T25+370cc.










-m
ca18guy
08-13-2003, 12:47 AM
Originally posted by James
http://www.imagestation.com/picture/sraid67/p3f90203983bbcbcfaa0db6155386c7a9/fbd07335.jpg

Am I the only one that gets the joke in 7 psi being safe boost :confused:
DudeYourSoOOJDM
08-13-2003, 12:50 AM
For people that dont know what they got themselves/getting themselves into....7lbs is surely THE SAFEST boost.
Pudula
08-13-2003, 02:17 AM
Originally posted by Hypersh1ft240
For people that dont know what they got themselves/getting themselves into....7lbs is surely THE SAFEST boost.
JESUS PEOPLE...you are all being lame. If stock boost is 10 psi, of course it is safe, furthermore "safest" boost would be none, so stop splitting hairs.
HaLo
08-13-2003, 09:40 AM
I wouldn't go to 1, 1.1 bar without proper fuel management (Z32 mafs, bigger injectors or higher fuel pressure, Tuned ECU or SAFC).

I'd say safe boost on stock SMIC without fuel management is 10-11psi while with proper fuel management, FMIC would be 14 psi for T25 and 17 psi for T28.


BUT!!! The safest boost it the stockest boost. ;)
gdrum
08-13-2003, 09:49 AM
I currently have:

Redtop Sr20det
rebuilt and balanced turbo by turbonetics T25
Blitz downpipe
Greddy Silvia 80MM exhaust
Jim Wolf Intake W/K&N
Apexi FMIC
Apix Multichecker to tell me my stats
Blitz Blow off
Blitz turbo timer and dual boost controler
DuffMan
08-13-2003, 10:11 AM
The problem is the stock S13 turbo is a piece of poo.

By stock 7psi I'm guessing that its already out of its efficiency range, and to run 14 or above that little thing is spinning so fast that it's demise is only a matter of time.
Fibercus
08-13-2003, 11:16 AM
Stock s14 sr "notchtop" & the most boost i see stock is 6psi.

Guess i must have a leak :confused:
DudeYourSoOOJDM
08-13-2003, 02:35 PM
...for many of us....stock boost is 7lbs....and NOT 10lbs.
fooddude
08-13-2003, 07:02 PM
Just got a new boost gauge and set my boost to .6-.7 kg/cm. Before I had the gauge I was running .8-.95 for like a year...shoulda got the boost gauge waay earlier.
chirpnslide
08-14-2003, 01:49 AM
should my peak on my boost controller be at 19.x ??
DudeYourSoOOJDM
08-14-2003, 02:01 AM
:bash: is all I have to say......
DudeYourSoOOJDM
08-14-2003, 02:30 PM
I currently have

No fuel mods?......

Did someone tell you guys 100% duty cycle is good? It doesent mean your injectors are working SOOOper.......
gdrum
08-14-2003, 04:28 PM
welli aways watch my apexi multichecker. and at 15 psi my injectors are at 88% or so. So that keeps me in the knowing its okay.
Jsquared
08-14-2003, 07:14 PM
do you have an upgraded fuel pump?

and 88% at 15psi seems kinda low, someone i know (AVC-R can monitor injector cycle) is hitting mid-90%s at 14psi...
gdrum
08-15-2003, 11:16 AM
I honestly dont know if i have an upgraded fuel pump. Its really loud though when the car is idleing you can hear the fuel pump just loud. Im a newbie sorry guys. The guy i bought it off of was 41 year old who owned a shop. He just said to not take it over 1 bar which is what he ususally runs it at. And when we do run it at 1bar itll peak 1.19 and show 88-95% on injector capacity. I just was wanting to know if thats good or bad thats all this thread was for. Thanks
gdrum
08-15-2003, 11:16 AM
I honestly dont know if i have an upgraded fuel pump. Its really loud though when the car is idleing you can hear the fuel pump just loud. Im a newbie sorry guys. The guy i bought it off of was 41 year old who owned a shop. He just said to not take it over 1 bar which is what he ususally runs it at. And when we do run it at 1bar itll peak 1.19 and show 88-95% on injector capacity. I just was wanting to know if thats good or bad thats all this thread was for. Thanks
gdrum
08-15-2003, 11:17 AM
oh yeah im also runnin apexi fmic thats gotta ammount for something....also what is with the peak levels....or spike levels do factory wastegates just do that?
DudeYourSoOOJDM
08-15-2003, 02:19 PM
I suggest going back to that guy and ask him these questions.

What fuel pump?
What Injectors?
Explain what you did to make it safe to run 1bar.
jupiterl
08-17-2003, 11:21 PM
I am pretty sure, the stock SR runs 0.6Bar, and I know most of the people with FMIC and basic bolt on can run a safe 0.8 ~ 0.9 Bar. Most of the aftermarket ECU have the boost setting goes up to 0.9 bar for stock T25 with some timing and fuel tuning.
h3x11
08-18-2003, 08:57 AM
let's put a larger turbo and larger injectors into the equation; with proper tuning, how much power would the SR hold.