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Best temp Thermostat for GT500's

Started by TS69GT500, July 27, 2025, 04:35:57 PM

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TS69GT500

69 GT500, runs excellent and all OK with the cooling system (Modine #379 radiator, new fan clutch etc.).
Factory spec for 69 is 192 deg thermostat I think.
Can't locate a 190 deg stat so have been running a 195deg.
I installed a SW mechanical temp gauge and can see exactly when the thermostat opens and keep an eye on the temp.
All seems OK as temp never exceeds 200.
Just wondering what other big block owners are running esp. in climates with hot summers and cold winters.

Thanks,
TonyS

jimhyc

Run a 160 in mine and have no issues. 
1969 GT500
1967 Mustang
1965 Galaxie 500
1969 Thunderbird
1928 Pierce Arrow
1930 Pierce Arrow
Prior cars
1967 GT500
1970 GT500
1968 KR
1970 BOSS 429
Daytona Coupe, 427 Cobra - kits
1971 BOSS 351

FL SAAC

#2
we are located in lovely  Floridaland and we run a brass 160 degree thermostat
When you arise in the morning, think of what a precious privilege it is to be alive to breathe, to think, to enjoy, to love.

Home of the Amazing Hertz 3+1 Musketeers

I have all UNGOLD cars

Not a SHELBY expert

Imitation is the sincerest form of flattery that mediocrity can pay to greatness.

TA Coupe

We run a 100° thermostat around here because we need to get ahead of the temperature because of the extreme heat😓😓

     Roy
If it starts it's streetable.
Overkill is just enough.

FL SAAC

Quote from: TA Coupe on August 05, 2025, 09:33:14 PMWe run a 100° thermostat around here because we need to get ahead of the temperature because of the extreme heat😓😓

     Roy


100 dugreeze


Now that's really kool !
When you arise in the morning, think of what a precious privilege it is to be alive to breathe, to think, to enjoy, to love.

Home of the Amazing Hertz 3+1 Musketeers

I have all UNGOLD cars

Not a SHELBY expert

Imitation is the sincerest form of flattery that mediocrity can pay to greatness.

Bob Gaines

160 degree but not just any . Best to use one of the free flowing or high performance type . They go by many names but they all have the similar look design. I use Mr Gasket because it is the least expensive and carried by the local auto parts store. 
Bob Gaines,Shelby Enthusiast, Shelby Collector , Shelby Concours judge SAAC,MCA,Mid America Shelby