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Hotter then "H" '74 Stingray.

by John
(Canton, MI U.S.A.)

I have a 1974 Corvette Stingray with a 350. It runs at around 200 - 230 degree's when running. I have adjusted the timing to 14 degree's BTC due to the mild cam I installed 2 years ago. Total overall timing is around 35 degrees. It does run great:) The radiator has been cleaned and flushed with the use of an extension air nozzle. It has a 160 degree thermostat. The fan is the conventional 5 blade with a new clutch and it blows air back towards the engine nicely. It does have the air dam and radiator shroud in place. It has heat wrapped headers and a powder coated Edelbrock performer manifold. The carb is an Edelbrock 600 AVS series carb that I put on last year.

This situation has been plaguing me for the past 3 years. I just did another flush and used 50/50 a coolant ratio and also added 1 bottle of water wetter. It does keep it a bit cooler, although it is still hot!

Concern: What I notice is that the fuel in the carb sounds like it is boiling. Never a good sign! It sounds as if it has "vapor lock", having a difficult time starting it from lack of fuel. A side bar, I just burned up a high torque, compact, starter due to the heat that the engine generates as well... bummer.

Do you have any suggestions on what to try next??

Thanks in advance,
John

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