Thermostat question 180 or 160?

Cuse99

Greasemonkey
Dec 21, 2020
218
43
I'm collecting parts for a crate motor. Chevy 350/290 long block. Max 308 HP and I doubt it will have that much, nothing special. Should I get the 160 deg thermostat or the 180 deg? I'm thinking 160 to help keep it cooler. No computer in the car. Thanks in advance.
 

565bbchevy

Geezer
Aug 8, 2011
8,448
113
Michigan
I run a 180 in my 86' Regal with a 355 SBC with aluminum heads and roller cam etc and have an aluminum radiator and water pump and new clutch fan with a shroud and it runs 180 all day long.
 
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Cuse99

Greasemonkey
Thread starter
Dec 21, 2020
218
43
With a good radiator and decent water pump 180 will be perfect for a SbC.
Thanks - I could have mentioned its the standard original radiator ('84) and a new aluminum water pump.
 

jlat

Greasemonkey
Jan 25, 2013
195
28
hello people: Do youz think the same is true for a turbo Buick?

IBBY
 

motorheadmike

Geezer
Nov 18, 2009
7,531
113
Ottawa, Ontario Canada
160* with a 180-195ish fan temp setting is a pretty effective way to ensure the thermostat is fully open. You need a decent operating temperature to boil off any water in the oil.
 
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83MonteCarloSS

Apprentice
Oct 5, 2015
86
33
The original that came in the El Co in 1984.
I wouldn't go lower than 180.

I went from 160 to 180 with the stock clutch fan and 180 was almost too low. I switched to an electric fan and 180 is about perfect.
 
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