1979 Chevy Corvette overheating

72,000 MILES • V8 • 2WD • AUTOMATIC
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BOHEMO2
  • MEMBER
  • 23 POSTS
I have a modified 350 ci (400+ HP) in my vette and am having trouble with it getting hot. I have put an Edelbrock high flow water pump on, a new 3 core radiator and even removed the thermostate but it still gets to 220 deg to 225 deg F after about 15 miles. I was wondering if the 2" duel exhaust could be creating too m uch back pressure and thus the overheating. The exhaust is the same as when the engine was stock at 195 HP.
Jul 27, 2008 at 8:58 AM
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MMPRINCE4000
  • ✓Experienced Mechanic
  • 8,548 POSTS
I would check the timing first, then assuming the cooling system is good, take it to a chassis dyno (usually around $100) and have the air/fuel ratio measured with a wideband O2 sensor.
Jul 28, 2008 at 12:45 AM
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