Carburated vortec thermostat bypass + hot water passage? - Page 2 - Hot Rod Forum : Hotrodders Bulletin Board
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  #16 (permalink)  
Old 11-08-2010, 07:34 PM
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The carb heat will be necessary because the Vortec heads don't have a provision for a heat riser built in because they are all originally fuel injected.
Another reason is that I'll be driving this vehicle through the winter and its gets stupid cold here. There are times throughout the winter where the temp will can go as low as -40˚C.

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Old 11-08-2010, 08:12 PM
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I will second that, -40 thanks for reminding me

So were is the heater return line going? will it tee in on the suction of the pump?
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Old 11-08-2010, 10:27 PM
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Quote:
Originally Posted by Custom10
I will second that, -40 thanks for reminding me

So were is the heater return line going? will it tee in on the suction of the pump?

Return hose from Heater core goes to passenger side tank on Radiator. My 71-C10 w/factory A/C & HD cooling has the same hose connection.
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Old 11-09-2010, 12:33 AM
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Quote:
Originally Posted by SSedan64
Return hose from Heater core goes to passenger side tank on Radiator. My 71-C10 w/factory A/C & HD cooling has the same hose connection.
Just like SSedan64 stated.
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Old 11-09-2010, 12:46 PM
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my engine doesn't have carb heat either.. the Edelbrock Performer RPM intake that I use doesn't have exhaust crossover passages. and i noticed absolutely no difference in the cold when I switched from the basic performer that did.. to the RPM that doesn't...
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Old 11-09-2010, 03:49 PM
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Quote:
Originally Posted by kc8oye
i don't think the carb heat is really necessary. I've driven my small block (not vortec heads) is way colder than -2c air temps with no issues. the only problem you MIGHT run into.. is carb icing.. typically only when it's raining and temps are near freezing. (air rushing thru the barely open throttles will make the metal cold enough for ice to form on)

I think you would be better to use a Thermostatic air cleaner housing and an exhaust stove.

Video of my engine starting and running after soaking overnight at 13F (-10c) and starting early in the morning at 21F.. no carb heat, open element air cleaner even.
Vortec heads dont have a crossover, and -10C is WARM up here.
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