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Old 09-26-2013, 04:13 PM   #1
dangerousatom
Scooby Specialist
 
Member#: 70710
Join Date: Sep 2004
Chapter/Region: Tri-State
Location: Quakertown/AREA1320 391whp
Vehicle:
2002 04STi Swaped RS
w/PPGS & 02 Wagon w/PPGs

Default 2-bar 29.4psi radiator cap?????

Just looking to see if anyone has run a 2-bar/29.4psi rad cap on their system. I just go one and have had no issues thus far, but have only gone 20-30 miles around town.

I know the Samco hoses are capable of far more then 30psi and my aluminum rad will hold easy, but was wondering on other bits and seals...if anyone actually knows If not I'll keep you all posted on how things play out
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Old 09-26-2013, 04:22 PM   #2
IA Performance
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Join Date: Sep 2002
Chapter/Region: RMIC
Location: Boulder, CO
Vehicle:
2008 Forester XT 5mt
Dark Gray

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I wish I had an answer for you, rather just a question. Was the 2 bar installed because you had boiling issues with the lower pressure caps (1.1. and 1.3bar)? Higher pressure should mean a higher boiling point.

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Old 09-26-2013, 04:56 PM   #3
dangerousatom
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Join Date: Sep 2004
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Location: Quakertown/AREA1320 391whp
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2002 04STi Swaped RS
w/PPGS & 02 Wagon w/PPGs

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I had no temp issues or any others but found it cheap and need a new cap to begin with.

Im hoping it works just fine and I get -10 or more degrees out of it ?!? I guess it's going to be an experiment. I definitely would not have even tried this with a plastic end tank rad
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Old 09-29-2013, 10:27 PM   #4
kellygnsd
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Member#: 32669
Join Date: Feb 2003
Chapter/Region: SCIC
Location: Rancho C
Vehicle:
2007 2.34LR, EFR7670
LINK G4 hybrid STi

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The higher pressure cap will not increase your cooling systems efficiency. You won't run any cooler with a higher pressure cap. If you were overhearing and boiling coolant the higher pressure cap will raise the temp at which the coolant boils so hopefully it wont now. When you're coolant boils excessively your cooling capacity suffers because of the stream blanket around your hottest parts. Steam, unlike liquid coolant is a terrible medium for heat transfer. The more you boil, the hotter things get, the worse heat transfer becomes, and things keep getting hotter and boil more.
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