Dual STi radiator cap? - Page 2 - Subaru Impreza WRX STI Forums: IWSTI.com
STI Forum
Join
Start New Thread Create Account Advertise FAQ Members List Contact
Dual STi radiator cap?
Dual STi radiator cap?
Go Back   STI Forums > > > Dual STi radiator cap?
Reply
 
Thread Tools
Old 06-16-07, 01:33 PM   #11
AnorexicSTI
Advanced Mastery Level I
Feedback Score: 15 reviews
 
Fav Mod: Starving my STI
My Subaru Parts for sale

Join Date: Sep 2006
Location: Lightweightville, Canada
AnorexicSTI is on a distinguished road
Default Re: Dual STi radiator cap?

Basically what I did is run the 1.3Bar STI cap on the fill tank and everything has been fine so far... I think the 1.4 Bar crucial cap on the fill tank was a bit higher than the 1.37bar one on the rad... I think the idea is u want to run the rad one a BIT higher than the one on the fill tank... so I run 1.4 (1.37) bar on the rad (stock) and 1.3bar (STI) on the fill tank... seems to be ok so far... will report back after next full track event.
AnorexicSTI is offline  
Likes 0 Dislikes 0
 
Reply With Quote
Sponsored Links
Advertisement
 
Old 06-16-07, 05:26 PM   #12
snorky
Advanced Mastery Level V
Feedback Score: 36 reviews
 
Fav Mod: Thermal Mass
My Subaru Parts for sale

Join Date: Apr 2006
snorky is on a distinguished road
Default Re: Dual STi radiator cap?

Quote:
Originally Posted by AnorexicSTI
so I run 1.4 (1.37) bar on the rad (stock) and 1.3bar (STI) on the fill tank... seems to be ok so far... will report back after next full track event.
+1 this is what i have been running for a year. with multiple track and autoxs. i don't have a coolant temp gauge (aside from stock) so i cannot comment on the cooling benefits. however my stock gauge does not ever move above the slightly below half spot that it always occupies when the engine is fully warmed. obviously the stocker isn't a very good indicator/measuring device but my point is that i have not seen an ill effects.
snorky is offline  
Likes 0 Dislikes 0
 
Reply With Quote
Old 06-16-07, 05:27 PM   #13
snorky
Advanced Mastery Level V
Feedback Score: 36 reviews
 
Fav Mod: Thermal Mass
My Subaru Parts for sale

Join Date: Apr 2006
snorky is on a distinguished road
Default Re: Dual STi radiator cap?

Quote:
Originally Posted by Gouki
Thanks for all of your responses.

Snorky:

So it'd be fine to replace the radiator cap with the STi cap, it just won't change anything?
imo i would leave the stocker on the radiator.
snorky is offline  
Likes 0 Dislikes 0
 
Reply With Quote
Sponsored Links
Advertisement
 
Old 06-16-07, 09:26 PM   #14
ace996
Becoming A Master Contributor
Feedback Score: 1 reviews
 
Car: 04 Porsche GT3 - Red
Fav Mod: HPDE
My Threads
Posts: 615
My Subaru Parts for sale

Join Date: Dec 2004
Location: Long Island, NY
ace996 is an unknown quantity at this point
Default Re: Dual STi radiator cap?

Have you overheated? If not, then put the caps down and leave it all alone. If anything, drain some fluid and pour in a bottle of WaterWetter and distilled water....best thing you can do to shed heat.

Distilled water and WaterWetter...do it.

Be good,
TomK
ace996 is offline  
Likes 1 Dislikes 0
 
Reply With Quote
Old 06-16-07, 09:50 PM   #15
subiewerkz
Feedback Score: 5 reviews
 
My Threads
Posts: 399
My Subaru Parts for sale

Join Date: Feb 2007
subiewerkz is on a distinguished road
Default Re: Dual STi radiator cap?

They say if you going to use 1.3 radiator cap, use silicone or performance hoses.
subiewerkz is offline  
Likes 0 Dislikes 0
 
Reply With Quote
Old 06-17-07, 10:27 AM   #16
snorky
Advanced Mastery Level V
Feedback Score: 36 reviews
 
Fav Mod: Thermal Mass
My Subaru Parts for sale

Join Date: Apr 2006
snorky is on a distinguished road
Default Re: Dual STi radiator cap?

Quote:
Originally Posted by ace996
Have you overheated? If not, then put the caps down and leave it all alone. If anything, drain some fluid and pour in a bottle of WaterWetter and distilled water....best thing you can do to shed heat.

Distilled water and WaterWetter...do it.

Be good,
TomK
water wetter is garbage
snorky is offline  
Likes 0 Dislikes 0
 
Reply With Quote
Old 06-17-07, 10:34 AM   #17
chaos311clarity
Advanced Mastery Level IV
Feedback Score: 7 reviews
 
Fav Mod: grip.
My Subaru Parts for sale

Join Date: Aug 2006
Location: Southeastern PA
chaos311clarity is on a distinguished road
Default Re: Dual STi radiator cap?

is water wetter the same thing as the subaru coolant additive that they put in from the factory? i think im going to drain some fluid and add the distilled water, i dont like how warm my car has been getting
chaos311clarity is offline  
Likes 0 Dislikes 0
 
Reply With Quote
Old 06-18-07, 02:26 AM   #18
Gouki
Becoming A Master Contributor
Feedback Score: 5 reviews
 
Car: 2007 WRX STi
Fav Mod: Spartan DE Type 2
My Threads
Posts: 622
My Subaru Parts for sale

Join Date: Nov 2006
Location: San Francisco/Dublin
Gouki is on a distinguished road
Default Re: Dual STi radiator cap?

Okay, so I need a higher pressure at the ratiator than the one next to the intercooler?
Gouki is offline  
Likes 0 Dislikes 0
 
Reply With Quote
Old 06-18-07, 04:30 PM   #19
auto228
Becoming A Contributor
Feedback Score: 0 reviews
 
Car: 2015 WRX 6MT
Fav Mod: stock
My Threads
Posts: 43
My Subaru Parts for sale

Join Date: Apr 2007
Location: Queens , NY
auto228 is on a distinguished road
Default Re: Dual STi radiator cap?

For me I would leave the fill tank cap along.
My opinion is if I put a higher pressure cap on the fill tank, that means I need more pressure to open up the cap and let the coolant run into the turbo and engine, another word means it is harder to let the coolant to get in and cool down the turbo & engine. only my 2 cents......
auto228 is offline  
Likes 0 Dislikes 0
 
Reply With Quote
Old 06-18-07, 05:45 PM   #20
snorky
Advanced Mastery Level V
Feedback Score: 36 reviews
 
Fav Mod: Thermal Mass
My Subaru Parts for sale

Join Date: Apr 2006
snorky is on a distinguished road
Default Re: Dual STi radiator cap?

your understanding of the cooling system is incorrect. the thermostat is what keeps fluid from circulating into the sytem. that is on the other side of the system. once the coolant reaches the thermostat's opening temperature("ideal" operating temperature), the thermostat begins to open.

the high pressure cap allows more pressure to be built up inside the system before it is dumped into the return (or reservoir in the case of the radiator cap). the higher pressure raises the boiling point of the fluid and reduces water pump cavitation.
snorky is offline  
Likes 0 Dislikes 0
 
Reply With Quote
Sponsored Links
Advertisement
 
Reply

Thread Tools

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


New To Site? Need Help? More

All times are GMT -8. The time now is 11:06 AM.


Powered by vBulletin
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
Designed & Powered by Domain Architect
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.