Wierd temps.....what T-stat do I have?
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Joined: Jul 2001
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Wierd temps.....what T-stat do I have?
I bought my '91 Z28 about 3 years ago and I never changed the t-stat nor did I examine the current one. After hearing some discussion on t-stats and cooling Im beginnine to think I dont have a stock temp t-stat. Last night it was very humid and cool, about 60-70. I was driving my Z28 around on back streets with no traffic at all at about 30-50 mph. My temp gauge was around 135-155. However, if I had left my car idling at a full stop my temp got to 200 (this took a while). Whats the verdict guys?
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Joined: Mar 2001
Posts: 203
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Ummm... why don't you take it out and look at it ?!
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92 Z28 5.7
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Trick Flow 23° heads, Comp Cams XR270HR-10 cam, Accel intake base + ported TPI,
TES headers, Flowmaster catback, MSD ignition, #24 SVO injectors, 1LE aluminum driveshaft.
Click here to see pics of my car !
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92 Z28 5.7
------------------
Trick Flow 23° heads, Comp Cams XR270HR-10 cam, Accel intake base + ported TPI,
TES headers, Flowmaster catback, MSD ignition, #24 SVO injectors, 1LE aluminum driveshaft.
Click here to see pics of my car !
Joined: Jul 1999
Posts: 10,950
Likes: 26
From: Orange, SoCal
Car: 1990 Pontiac Trans Am
Engine: 355 TPI siamesed runners
Transmission: Tremec T56
Axle/Gears: 12-Bolt 3.73
Why go to all that trouble?
The stock thermostat is 195º, but if its been changed it could be anything, like 160º, or 180º.
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1991 Camaro Z28
5.7L 5-Speed (originally 305)
13.23 @ 107.62 MPH
Southern California
Member: SoCal 3rd Gen F-Bodies
Webmaster: SoCal F-Bodies
-=ICON Motorsports=-
The stock thermostat is 195º, but if its been changed it could be anything, like 160º, or 180º.
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1991 Camaro Z28
5.7L 5-Speed (originally 305)
13.23 @ 107.62 MPH
Southern California
Member: SoCal 3rd Gen F-Bodies
Webmaster: SoCal F-Bodies
-=ICON Motorsports=-
Supreme Member
iTrader: (1)
Joined: May 2001
Posts: 1,638
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From: Greenwood, Indiana
Car: 1984 Trans Am
Engine: Vortec 355
Transmission: TH-700R4
Axle/Gears: GM Axles and GM 3.73
wow 135-155
man im lucky to get my car under 220 when i am cruising
maybe there is something wrong with my car
lol
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84TA T-tops L-69 305HO TH-700R4 stock 190hp and 240 ft-lbs.
new best E.T. (dont laugh) 15.986 @84.93mph
old best E.T 15.997@86.04
http://www.geocities.com/K_towngangsta
man im lucky to get my car under 220 when i am cruising
maybe there is something wrong with my car
lol
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84TA T-tops L-69 305HO TH-700R4 stock 190hp and 240 ft-lbs.
new best E.T. (dont laugh) 15.986 @84.93mph
old best E.T 15.997@86.04
http://www.geocities.com/K_towngangsta
Junior Member
Joined: Jul 2001
Posts: 86
Likes: 1
From: San Antonio, TX
Car: 89 Firebird Formula T-Top
Engine: SP383 FIRST Fuel Injection
Transmission: T56 Tremec Magnum
Axle/Gears: Moser 12 Bolt, 3.42 Eaton Posi
Probably no t-stat installed, if it's running that cold.
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Junior Member
Joined: Apr 2001
Posts: 32
Likes: 0
Most likely a 160* thermo, no big deal except for the fact that your car needs to be setup for this, if stock you need to change it back to the 195*(I did this and my car and it ran better to my amazement). These cars run at a certain temperature for a reason and they are designed for that temp and everything functions at that temp unless you make mods and that is a different story. I had a 160* thermo(not that it helped) and a bad EGR valve and I was getting 27 mpg hwy and 24 mpg cty, I changed the thermo and the EGR valve and now I am back down to 18 mpg hwy but I have better performance.
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