18 psi - Subaru Enthusiasts Car Club of the Sierras

Dknits782 · 2008-01-07, 10:16 PM

i know its another dumb question but is it safe that in 4th gear floored i hit 18 psi? im in a 05 sti with turbo back exhaust and stage 2 flash with cobb ap.

Thanks

Dean · 2008-01-07, 10:34 PM

The description file for the map you loaded should give boost targets.

The '04 STI Stage 2 map says "Target boost pressure is 17.5psi +/- 0.5psi depending on vehicle and conditions. Boost will taper at redline due to air flow limitations of the VF39 turbocharger."

Dknits782 · 2008-01-07, 10:47 PM

oh i will look thanks

sperry · 2008-01-08, 11:11 AM

Also, from memory, 18psi sounds about right for a Stage 2 STi map.

killer60foot · 2008-01-12, 10:59 PM

how long ago did put that map in??? their are a number of things that affect boost psi...the knock threshold should be setup to where you shouldn't have any worries at that boost with a decent map...

2008-01-07, 10:16 PM	#1
Dknits782 EJ18 Join Date: May 2007 Location: Gardnerville N.V Posts: 61 Car: 05 sti	18 psi i know its another dumb question but is it safe that in 4th gear floored i hit 18 psi? im in a 05 sti with turbo back exhaust and stage 2 flash with cobb ap. Thanks

2008-01-07, 10:34 PM	#2
Dean Señor Cheap Bastarde Real Name: Dean Join Date: May 2003 Location: $99 Tire Store Posts: 9,294 Car: $.04 STI Class: Fast,Cheap & Reliable=STI Deal, did somebody say Deal? Oh, Dean, yeah that's me.	The description file for the map you loaded should give boost targets. The '04 STI Stage 2 map says "Target boost pressure is 17.5psi +/- 0.5psi depending on vehicle and conditions. Boost will taper at redline due to air flow limitations of the VF39 turbocharger." __________________ I am a Commodore PET --- Now get off my lawn you kids...

2008-01-08, 11:11 AM	#4
sperry The Doink Real Name: Scott Join Date: Nov 2002 Location: Portland, OR Posts: 20,335 Car: '09 OBXT, '02 WRX, '96 Miata Class: PDX/TT-6 The way out is through	Also, from memory, 18psi sounds about right for a Stage 2 STi map. __________________ Is you is, or is you ain't, my con-stit-u-ints?

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2008-01-07, 10:47 PM	#3
Dknits782 EJ18 Join Date: May 2007 Location: Gardnerville N.V Posts: 61 Car: 05 sti	oh i will look thanks

2008-01-12, 10:59 PM	#5
killer60foot EJ22 Real Name: Greg T Join Date: Nov 2006 Location: Reno Posts: 116 Car: 01 IS300	how long ago did put that map in??? their are a number of things that affect boost psi...the knock threshold should be setup to where you shouldn't have any worries at that boost with a decent map...