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Discussion Starter #1
With that 327 under the hood and 365-375hp how hot does the engine get? When I compare my 64 to my 75 the 64 runs a lot hotter than the 75.
I realize there is a lot more horsepower in the 64. But the real question is how hot should they run and what do you feel is a comfortable temperature>:huh:
 

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I find that with my 327/365HP I can cruise all day at 55 MPH and the temp will never go above 180 degrees, regardless of he outside temperature.
However, if I push it up to 60-65 MPH on a hot day, then the temperature starts to climb. Once it gets up to breaking 200 degrees, I usually wimp out and reduce my speed to bring the temp back down.

It has been suggested to me that I need to replace the thermostat with an orifice plate.

The theory is that because of the 4:11 gears, when I get up to 60-65 PH, the engine RPM is such that the waterpump is pushing the water through the rad before it gets a chance to get cooled, hence the higher temps at higher speeds.

:D :D
 

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Discussion Starter #3
64vette said:
I find that with my 327/365HP I can cruise all day at 55 MPH and the temp will never go above 180 degrees, regardless of he outside temperature.
However, if I push it up to 60-65 MPH on a hot day, then the temperature starts to climb. Once it gets up to breaking 200 degrees, I usually wimp out and reduce my speed to bring the temp back down.

It has been suggested to me that I need to replace the thermostat with an orifice plate.

The theory is that because of the 4:11 gears, when I get up to 60-65 PH, the engine RPM is such that the waterpump is pushing the water through the rad before it gets a chance to get cooled, hence the higher temps at higher speeds.

:D :D
Brian did the suggestion say what size of orifice you would have?:huh:
 

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No Ray, I don't have that information....yet.


There is a guy in town that is the local specialist if you want a small block Chevy to go fast. All the local drag guys use him for all their mechanical work.

As soon as I get a chance to get out to his shop, I should get the answer and hopefully the orifice plate as well, he's the local supplier for that kind of stuff.

By the way, he's the guy that rebuilt the engine in my '64 several years ago.

:D :D
 

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Discussion Starter #5
64vette said:
No Ray, I don't have that information....yet.


There is a guy in town that is the local specialist if you want a small block Chevy to go fast. All the local drag guys use him for all their mechanical work.

As soon as I get a chance to get out to his shop, I should get the answer and hopefully the orifice plate as well, he's the local supplier for that kind of stuff.

By the way, he's the guy that rebuilt the engine in my '64 several years ago.

:D :D
Brian when you are over there could you pick me one up also, I wouldn't mine trying it out. Mine starts to heat up when I'm running between 65 and 70. I have seen the temp. go up to 220 but it never has boiled over. Part of my problem is the temperature gauge, but even though she still runs warm. See you Sunday at the 50th Quad C style.:thumbsup:
 
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