Whats the best temperature for the thermostat to be set on? - Pontiac GTO Forum
Pontiac GTO Pontiac GTO Forum

» Auto Insurance
Wheel & Tire Center

Go Back   Pontiac GTO Forum > The 2004-2006 GTO > Engine Discussions
Register Home Forum Active Topics Photo Gallery Garage Search Today's Posts Mark Forums Read Auto EscrowInsurance

GtoForum.com is the premier Pontiac GTO Forum on the internet. Registered Users do not see the above ads.
Reply
 
LinkBack Thread Tools Display Modes
Old 02-27-2011, 08:20 PM   #1 (permalink)
 
Join Date: Nov 2007
Posts: 28
My Photos: (0)
Whats the best temperature for the thermostat to be set on?

I dont know if this is the right category. But I was wondering if i should change my thermostat temperature.. My friend changed his on his vette and made it a little cooler and it runs a bit smoother. Could the same be said for my 04 GTO? My fans kick on at 226.. is that normal? Could I get better performance by running it a little cooler???
nikedo420 is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 02-27-2011, 10:50 PM   #2 (permalink)
 
Join Date: Jun 2009
Posts: 2,777
My Photos: (0)
Leave the stock thermostat, tune the fans. Mine rarely goes above 197.
Poncho Dan is offline   Reply With Quote
Old 02-27-2011, 10:57 PM   #3 (permalink)
 
GM4life's Avatar
 
Join Date: Mar 2007
Location: RAF Lakenheath, UK
Posts: 4,162
My Photos: (15)
Quote:
Originally Posted by nikedo420 View Post
I dont know if this is the right category. But I was wondering if i should change my thermostat temperature.. My friend changed his on his vette and made it a little cooler and it runs a bit smoother. Could the same be said for my 04 GTO? My fans kick on at 226.. is that normal? Could I get better performance by running it a little cooler???
Yes, it reduces heat soak. To get full advantage of the cooler running thermostat is to lower the fan temps. Do a search we have covered this same subject before.
GM4life is offline   Reply With Quote
Old 02-28-2011, 02:06 AM   #4 (permalink)
 
Join Date: Nov 2007
Posts: 28
My Photos: (0)
:)

Cool thanks much
nikedo420 is offline   Reply With Quote
Old 02-28-2011, 08:56 AM   #5 (permalink)
Super Moderator
 
svede1212's Avatar
 
Join Date: Oct 2005
Location: Grand Rapids, Michigan
Posts: 3,451
My Photos: (11)
Garage
I'd do what Dan said. Leave the stat and tune the fans. I've never seen any data that shows running the coolant a little lower does much of anything. If it did we'd be running 100* stats. It seems to be one of those "common knowledge" things that gets legs and runs
__________________
2004 Blk/Rd M6


SvedeSpeed OTRCAI|!MAF|HP Tuners|SLP LTs|FTI cam|SLP UD|243 Heads|FAST 102|2.5" Exh

Rip Shift|DSS shaft|Diamond Stg3 |Lovells |Koni|Harrop|SuperPro bushes|Pedders|Hotchkis|3.91s



svede1212 is online now   Reply With Quote
Old 02-28-2011, 02:34 PM   #6 (permalink)
 
GM4life's Avatar
 
Join Date: Mar 2007
Location: RAF Lakenheath, UK
Posts: 4,162
My Photos: (15)
Quote:
Originally Posted by nikedo420 View Post
Cool thanks much
Your best bet it to get a 160 thermostat if you ever see a 170 don't bother the stock thermostat is 186. I ran the stock for along time until I started modding I was told by my tuner who has been doing this for along time to run the 160.
GM4life is offline   Reply With Quote
Old 02-28-2011, 03:28 PM   #7 (permalink)
 
GM4life's Avatar
 
Join Date: Mar 2007
Location: RAF Lakenheath, UK
Posts: 4,162
My Photos: (15)
Quote:
Originally Posted by svede1212 View Post
Leave the stat and tune the fans. I've never seen any data that shows running the coolant a little lower does much of anything. If it did we'd be running 100* stats. It seems to be one of those "common knowledge" things that gets legs and runs
With that said. Why even bother to lower the fan temps?
GM4life is offline   Reply With Quote
Old 03-01-2011, 07:13 PM   #8 (permalink)
Super Moderator
 
svede1212's Avatar
 
Join Date: Oct 2005
Location: Grand Rapids, Michigan
Posts: 3,451
My Photos: (11)
Garage
Quote:
Originally Posted by GM4life View Post
With that said. Why even bother to lower the fan temps?
Because of water's boiling point and high heat's effect on warp-age and such. Other than "common knowledge" like your tuner professed I've never seen any data on benefit in longevity or performance. In fact running an engine too cool can be detrimental in the long haul. Oddly enough they engineer them to run in a fairly narrow range for peak efficiency
__________________
2004 Blk/Rd M6


SvedeSpeed OTRCAI|!MAF|HP Tuners|SLP LTs|FTI cam|SLP UD|243 Heads|FAST 102|2.5" Exh

Rip Shift|DSS shaft|Diamond Stg3 |Lovells |Koni|Harrop|SuperPro bushes|Pedders|Hotchkis|3.91s



svede1212 is online now   Reply With Quote
Old 03-01-2011, 08:21 PM   #9 (permalink)
 
GM4life's Avatar
 
Join Date: Mar 2007
Location: RAF Lakenheath, UK
Posts: 4,162
My Photos: (15)
Quote:
Originally Posted by svede1212 View Post
Because of water's boiling point and high heat's effect on warp-age and such. Other than "common knowledge" like your tuner professed I've never seen any data on benefit in longevity or performance. In fact running an engine too cool can be detrimental in the long haul. Oddly enough they engineer them to run in a fairly narrow range for peak efficiency
Waters boiling point is higher because of antifreeze and pressure. Stock is not even close to cause damage. I don't think its common knowlage. Tuners don't make money off of thermostats. Besides I trust my tuners knowlage over anyone elses he has been doing this for many years. I never seen any data supporting being bad for an engine, running ~15 or so below stock operating temp. The advertised range on a t-stat is where it starts to open. I haven't seen data that supports both are claims so I'm not agreeing or disagreeing with you.
GM4life is offline   Reply With Quote
Old 03-01-2011, 09:26 PM   #10 (permalink)
 
Join Date: Jun 2009
Posts: 2,777
My Photos: (0)
Tune the fans to be close to tstat temp, because, why have a 20-30+ degree temperature swing? Consistency is probably the best. Like I said, the wildest swings on mine are between 189-197, a whole 8 degrees.

BTW, if you want control of the fans below 192, you need to flash a custom operating system to the PCM.
Poncho Dan is offline   Reply With Quote
Sponsored Links
Advertisement
 
Reply

  Pontiac GTO Forum > The 2004-2006 GTO > Engine Discussions


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not 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
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
thermostat help AlanSr Service, Maintenance and Technical Discussion 17 10-09-2009 08:07 AM
whats a good set of valve springs to use? wytnyt 1964-1974 GTO General Discussion 6 08-07-2008 08:16 AM
High temperature mdilello Engine Discussions 1 10-18-2007 06:47 PM
Temperature and the LS2 fergyflyer Racing and Kill Forum 17 08-11-2005 10:04 PM
Temperature/Heat Control - Spring loaded ? philpio 2004-2006 GTO General Discussion 1 11-09-2004 12:26 PM

Powered by vBadvanced CMPS v3.2.2

All times are GMT -5. The time now is 07:07 PM.



Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
SEO by vBSEO 3.3.2
Garage Plus vBulletin Plugins by Drive Thru Online, Inc.