What thermostat should I use? - Team Camaro Tech
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post #1 of 10 (permalink) Old Aug 21st, 03, 07:59 PM Thread Starter
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I have a 67 camaro with a 70 1/2 LT-1 350 engine camelback heads 375 hp cam 11:1 high dome pistons. What would be the ideal thermostat to run temperature wise? Radiator and pump are stock. Still havn't decided what fan I will use. I was also wondering where you drill the 3/16 holes in a thermostat and should I? Thanks

1967 Camaro coupe Deluxe interior LT-1 350 w/ 4spd. M-21 trans and 12 bolt rear.


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post #2 of 10 (permalink) Old Aug 22nd, 03, 01:42 AM
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160 or 180. 180 is seposed to be the ideal operating temp for combustion from previous talks. 180 might be nicer for your mild winters over there. Even if you put 160 in it's going higher after warming up unless you are in screaming cold weather. 180 will probably give you a better quick heater responce in winter cold.
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post #3 of 10 (permalink) Old Aug 22nd, 03, 06:44 AM
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Use a Robertshaw #330-180 balanced-flow thermostat and you don't need to drill any holes.

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post #4 of 10 (permalink) Old Aug 22nd, 03, 11:34 AM Thread Starter
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Snatchin, Mild winters It ain't Alaska but I wouldn't call them mild we've been 30 below already with wind chill factors. I'm running a 160 now and what I've been reading it's not enough to run the oil efficiantly. I forgot to mention this I don't drive it much during the winter.

John, I've been looking at those stats some already have holes drilled in them. But you don't think I need that type? Thanks guys

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1967 Camaro coupe Deluxe interior LT-1 350 w/ 4spd. M-21 trans and 12 bolt rear.


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post #5 of 10 (permalink) Old Aug 22nd, 03, 01:26 PM
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I agree with JohnZ. The Robert Shaw style thermostats are the only way to go in my opinion. I have had problems in the past with the standard type (not opening or cycling). The Robert Shaw style are marketed by Mr. Gasket as well (I am pretty sure). I would also suggest a 180*

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post #6 of 10 (permalink) Old Aug 23rd, 03, 06:22 PM Thread Starter
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Camaroman, You're right it does say Mr. Gasket on the package. I bought the #330-180 that JohnZ suggested it had a diff # on packg but the thermo had the # above on it. Thanks guys

BTW: What should be my max temp to be running at with this stat on a hot summer day and should I use distilled water with my 50/50 Prestone?

1967 Camaro coupe Deluxe interior LT-1 350 w/ 4spd. M-21 trans and 12 bolt rear.


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post #7 of 10 (permalink) Old Aug 24th, 03, 10:14 AM
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If the rest of your cooling system is up to snuff (primarily the radiator), it should run at 180*-185* with a 180* thermostat.

It's always a good idea to use distilled water with your 50-50 mix; tap or well water contains dissolved minerals that will precipitate out of solution and accelerate the formation of scale in the water jackets and radiator tubes. [img]graemlins/thumbsup.gif[/img]

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post #8 of 10 (permalink) Old Aug 24th, 03, 07:33 PM Thread Starter
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JohnZ,

This might be a dumb question but if I go with distilled water and sometime later need to add water in a pinch can I mix some well water with the distilled 50/50 mix w/out a problem?

[img]graemlins/clonk.gif[/img]

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1967 Camaro coupe Deluxe interior LT-1 350 w/ 4spd. M-21 trans and 12 bolt rear.


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post #9 of 10 (permalink) Old Aug 25th, 03, 03:56 PM
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Yup, I wouldn't be too concerned about it; if you have to add, go ahead. The difference between tap/well and distilled water is important primarily for long-term reliability of aluminum radiators, as they can't be repaired. You should replace your coolant every two years anyway to maintain the effectiveness of the anti-corrosion inhibitor package. [img]graemlins/thumbsup.gif[/img]

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post #10 of 10 (permalink) Old Aug 25th, 03, 06:47 PM Thread Starter
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Thanks John

1967 Camaro coupe Deluxe interior LT-1 350 w/ 4spd. M-21 trans and 12 bolt rear.


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