Whats stock boost for S13 S14 SR20DET

[SoSideways]

Originally Posted by s13Eper

Stock redtop swap here. ~11psi (autometer) with stock boost solenoid.

DING DING DING!!

I think we have a weiner!

[Sileighty_85]

Im sure that the S14 Boost level is no Higher than the Red Top Since the S14 still runs 370cc Injectors

I have a video @ home of a RHD BONE STOCK 180SX with a close up on the boost gauge when I was test driving it, I will find it and upload it when I get home... If interested.

If I remember correct I dont think I ever saw it go above .7 Bar

[UNISA JECS]

Originally Posted by Sileighty_85

Im sure that the S14 Boost level is no Higher than the Red Top Since the S14 still runs 370cc Injectors

I have a video @ home of a RHD BONE STOCK 180SX with a close up on the boost gauge when I was test driving it, I will find it and upload it when I get home... If interested.

If I remember correct I dont think I ever saw it go above .7 Bar

Hp rating is higher on S14 isnt it plus has a T28 correct? If so that makes perfect sense.

Try and get the video uploaded if you can that'll be cool.

[SlideWell]

the optional 3 din gauge cluster for the kouki s14 SR reads boost up to .7 bar. and yes, T28 for all s14 SR's.

[!Zar!]

7lbs no solinoid. Which is almost .5bar.

[slidingsky]

I'm still getting mixed signals but most of them say that the boost pressure itself is 10 PSi +/- .5psi for the S13/14 SR

Which would be more reasonable compared to the Avenir.

[UNISA JECS]

Originally Posted by slidingsky

I'm still getting mixed signals but most of them say that the boost pressure itself is 10 PSi +/- .5psi for the S13/14 SR

Which would be more reasonable compared to the Avenir.

What I found on the Avenir was threw a japanese translation.

‚ª‚ñ‚΂êƒAƒxƒj[ƒ‹

ブースト
ノーマル（０．６５）。ＥＶＣぐらいは付けたいかな？

Translated:
"Boost Normal (0.65). As for about EVC the kana which we would like to attach?"

[s13silvia88]

its for response. with my friends with out the boost solenoid there cars lag in response and boost comming on fast. or early in the rpms. i connected it rite bc i had a front clip and i kno wat wires were connected to it so u jsut extend it...

[UNISA JECS]

Originally Posted by s13silvia88

its for response. with my friends with out the boost solenoid there cars lag in response and boost comming on fast. or early in the rpms. i connected it rite bc i had a front clip and i kno wat wires were connected to it so u jsut extend it...

It not strickly for responce, however it may help improve responce, but if you were to look closely at the wastgate signal line, inside of it you will find what is called a restrictor pill, this delays the on-rush of incoming air briefly to alow boost to get a head start before being bleed off to maintain targer boost pressure, this lil pill have a big influence on precieved lag.

[SoSideways]

Those pills are like the holy grail of boost control on the twin turbo Z32s.

[Sileighty_85]

Ok Well I can confirm that the Stock boost pressure for the S13 SR20DET is .7 Bar

I'd like to upload the video but there is like 2 mins of crap until the I show the Boost gauge.

[nismo_s14_]

i read and was told:
s13 sr is @ 7psi
s14 sr is @ 8psi
s15 sr is @ 10psi

[Silverbullet]

^ you obviously don't read.

i find it a little hard to believe the stock S14 was able to adjust to 10psi on a T28 from the factory. That yields roughly 250whp.. close to maxing injectors.

[kernel]

I can confirm the stock boost pressure is 7 PSI with this solenoid hooked up.

Both my RHD (180sx 1991 and Silvia 1991) were boosting that and everything was stock.

180sx had a FMIC with cat-back, silvia had cat-back only. That's all.

[Sileighty_85]

Originally Posted by munkfu

I can confirm the stock boost pressure is 7 PSI with this solenoid hooked up.

Both my RHD (180sx 1991 and Silvia 1991) were boosting that and everything was stock.

180sx had a FMIC with cat-back, silvia had cat-back only. That's all.

are you sure its 7psi and not .7 Bar?

My 180SX was bone stock with ONLY a cat back and ran .7 BAR

dont forget about the pressure drop you will encounter when using a FMIC

[UNISA JECS]

Originally Posted by munkfu

I can confirm the stock boost pressure is 7 PSI with this solenoid hooked up.

Both my RHD (180sx 1991 and Silvia 1991) were boosting that and everything was stock.

180sx had a FMIC with cat-back, silvia had cat-back only. That's all.

Again not doubting you that you have it hooked up, but maybe your solenoid doens't work but this goes against having a boost solenoid in the first place if your only seeing 7psi because the wastegate alone will manage a 7psi boost pressure.

[s13Eper]

Just a side note, I have a switch wired between the factory boost control solenoid and the ecu. Closed (on) = around 11psi, open (off) = around 7psi. Stock red top.

[kernel]

I have Defi gauges in both my car and it was .5 Bar

Also, I can't confirm that both solenoid were working but I'm sure I had 7 Psi, no more.

I can confirm that the spool up time was higher without the boost solenoid, I hooked up my actuator directly to the hot pipe and it was a bit slower !

The silvia had SMIC...so...no pressure drop there and still 0.5 bar !

[koukimonster139]

couldve sworn it was 11psi


who cares tho, stock boost sucks

[Def]

All I've got to say if it's 11 psi, is I feel sorry for those with stock S13s/S14s, as the SMIC takes about 2 seconds of WOT to heatsoak at about 10-11 psi on a T25.

I got nasty detonation on the track with 93 octane, stock everything except the turbo-back exhaust and 8 psi. After 1 lap the SMIC was essentially something good to cook an egg on, that's about it.

[redclaw05]

im rocking a SMIC. running 7 or 8 psi according to my profec B.
stock t28 as well.


hoping to get a FMIC very soon so it can feel the breeze

[asiandude15]

Alright we hooked up an autometer guage to my friends car and he has a S14 (from a k's aero) sr20det in his S13. The guage said 5lbs. I was like WTF?!?! Any ideas why cuz the guage is hooked up before the FMIC cuz I wanted to see a direct reading without the pressure drop and I would imagine with the pressure drop through the FMIC setup, if it is really at 5lbs than that would mean like 3-4lbs by the time it gets to the throttle.... Weird

[SoSideways]

Your wastegate actuator could be tired and on its way out.

[jssilc]

i kno this is a old thread but interesting. did you guys ever think the bc could be used to keep the boost consistant. im on stock wastegate on a t25 but on a ka now 4-5gear the boost kinda doesnt stay consistant maybe the bc is ment to keep the boost consist through different conditions.

[TurboStrong]

My stock notch top is stock and she hits 7 pounds.

[Mesarina]

Old thread I know, but just to clarify I have a stock jdm 94 180sx (black top) with boost solenoid, and stock boost is 7psi, no more, maybe you guys doing swaps got an engine with a shimmed wastegate or something...

[cotbu]

Old thread I know, but just to clarify I have a stock jdm 94 180sx (black top) with boost solenoid, and stock boost is 7psi, no more, maybe you guys doing swaps got an engine with a shimmed wastegate or something...

You with only a post count of ten...should do some test. like remove the solenoid from the equation, then log boost if it's 7psi ask yourself what's wrong with this?

unrelated, I have friend that says he was running 10psi. He was actually running 20+ on an s14 bb turbo with 370's. When he looked at his gauge it was 10psi. I don't doubt that. When I looked at the gauge it was 20, then by 6900rpm it was 10psi

your solenoid is probably not functioning or the ecu is detecting something (like over boost) and turning off the solenoid.

[Mesarina]

Originally Posted by cotbu

You with only a post count of ten...should do some test. like remove the solenoid from the equation, then log boost if it's 7psi ask yourself what's wrong with this?

unrelated, I have friend that says he was running 10psi. He was actually running 20+ on an s14 bb turbo with 370's. When he looked at his gauge it was 10psi. I don't doubt that. When I looked at the gauge it was 20, then by 6900rpm it was 10psi

your solenoid is probably not functioning or the ecu is detecting something (like over boost) and turning off the solenoid.

Post count doesn't have anything to do about how much me or you know about cars, I have code 55 on my ecu, I already removed the solenoid from the equation too, hope your friend's s14 is not running 20psi with 370cc injectors

[cotbu]

Sorry about the post count thing, It's not what you think. He has an s13 with an s13 sr20 and a s14bb turbo.

You on the other hand bumped a thread with out documenting your proof that the solenoid gives you 7psi. I no longer even think about testing this theory, since i dumped the solenoid a while ago. If someone, such as yourself does have the solenoid and can document it keeping boost at 7psi or allowing boost to reach 11psi, would put an end to this age old question.

[Solus Christus]

I have a stock S13 Silvia K's and my boost gauge reads 11 psi with boost solenoid.

I'm guessing a motorswap without the boost solenoid will default to the wastegate's 7 psi but a stock JDM Silvia/180 with the solenoid can reach 11 psi.