What is stock boost lvl in RS 1.4t??

[ClintcorpCEO]

Hey guys searched all over but can't find the answer. I have a stock Sonic RS 1.4t and I'm curious to know what psi the stock turbo reaches ? ,given there is no boost gauge .


Thanks !!!

 

[ShawnB]

14-16 psi

 

[ShawnB]

Tuned will get you 21-23 psi.

 

[Sneakerfix]

Boost can be 12psi up to 18psi stock.


On my flashed tune I'm at 19psi and make 180hp

 

[sonic_braaappp]

Up to 18 psi stock? Mine has never seen more than 12 ._.

 

[ShawnB]

18psi is a stretch. Must be sea level. If I try I can hit 16psi, but I average 10-14 in the warmer weather. Dead of winter I lucky to get 7psi. Lol

 

[sonic_braaappp]

Where i'm at i'm only 55 feet above sea level, i want this magical 18 psi of pure unicorn urine and fairy poo y'all speak of with factory tune.... lol

 

[ShawnB]

Yea I've never seen 18psi.. 16 on first hard pull for me, then avg 11-14 after that.

 

[sonic_braaappp]

even when i had a air intake on mine (now just modded stock airbox) i didnt see over 12, and an intake on every other turbo car i've had bumped the boost up about 2-3 psi without a tune.

 

[laborsmith]

Long ago Chevy said 16 max. By long ago I mean pre start of regular production I am thinking in a media release.

Laborsmith

 

[ScarabEpic22]

Not a simple answer as the ECM will control boost levels to make the desired TQ value it is programmed with.

Ive seen ~165kPa maybe 170kPa on my 13 RS 6MT, take ~101 as atmospheric so thats ~65-70kPa (9.5-10psi) of actual boost. I live in Seattle so I'm at sea level or a few hundred feet above.

 

[Natesriv]

I bump 11-12 SOMETIMES (I'm in an LTZ)...but mostly 10 when I punch it.

 

[Sneakerfix]

Search over on cruzetalk it's a few post stating up to 18 was seen but I'm having issues loading the site

Max I ever got stock was 16.5 on my cruze

 

[Tyler13999]

Im at Mile high in Thornton, CO. before I was tuned I would hit 16lbs. that's peak boost in third gear. the ecu doesn't give full boost till 3rd gear because of danger of damaging axles/ transmission, ect...

 

[carsNskis]

Im at Mile high in Thornton, CO. before I was tuned I would hit 16lbs. that's peak boost in third gear. the ecu doesn't give full boost till 3rd gear because of danger of damaging axles/ transmission, ect...

Hello fellow CoSonic! I'm in Littleton, work at Century in Broomfield. Stop in some time and say hey!

 

[Tyler13999]

Hello fellow CoSonic! I'm in Littleton, work at Century in Broomfield. Stop in some time and say hey!

I have man! The orange lt on cruze Eco wheels and E85. Let's cruise peak to peak soon. I've got Tuesdays and Sundays off! Pm me

Sent from my SM-N910T using Tapatalk

 

[shibbs]

So I just did some logs with the Torque app and a bluetooth OBD2 adapter and only got 9.8psi peak, and 9psi hold. Does this seem right?

Specs:
2018 RS Hatch, 6-speed, with the GM Performance exhaust and tune
Outside temperature was just above 0 C / 32 F.

 

[ScarabEpic22]

See my previous post #11 in this thread.

I'm close to sea level and see anywhere from 9-14psi depending on spark timing and fuel I'm running. Seems close to me for a stock ECM calibration. You have the GM exhaust one, I don't know what that does as far as adjusting the desired TQ value (which adjusts desired boost).

 

[sonic18]

even when i had a air intake on mine (now just modded stock airbox) i didnt see over 12, and an intake on every other turbo car i've had bumped the boost up about 2-3 psi without a tune.

What did you do to the stock airbox? Wondering cause I just modded mine.

 

[soggy]

so I can only use manifold pressure. ive zeroed to 14.7 and see 18 psi stock. but I also have a vacuum leak that takes me down to 4.7psi at idle, so I guess my true boost is more like 10psi