Running hot - Team Camaro Tech
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post #1 of 12 (permalink) Old Apr 30th, 01, 04:32 PM Thread Starter
 
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I have a 67 camaro with a 383 stroker motor,turbo 400 w/2800 stall. The car is running very hot!!!! 3-core rad thats been clean & rodded out,6 blade flex-a-lite 1300 series fan 16",factory fan shroud and weiand aluminum water pump,new 16 lbs rad cap and a new thermosat and a trans cooler. When the car is idling temp is a 220-230 degrees driving on the freeway 190-210. In mid 80's temp. One the temp gauge went past the 240 mark and all of a sudden it droppred back down to around 200, thats way I changed the thermosat. I was wonder if a big block 4-core radiator or a be cool aluminum radiator would help?
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post #2 of 12 (permalink) Old Apr 30th, 01, 05:11 PM
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This may seem off course but what is your exhaust like? I had a very skilled exhaust professional tell me too small of pipe, wrong bends (too tight) and even wrong mufflers can raise the operating temp of an engine.

Sounds like you have an airflow problem at idle but it shouldn't heat up when moving...

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post #3 of 12 (permalink) Old May 1st, 01, 04:23 AM
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I went the high flow water pump route, etc and was told I needed a high flow thermostat. I got one from Stewart although it seems like it is stock with some small holes drilled. Also, I went with a higher pressure cap - 22 lbs.
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post #4 of 12 (permalink) Old May 1st, 01, 10:11 AM Thread Starter
 
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The car has headers w/21/2" exhaust with a crossover and dyno max super turbos
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post #5 of 12 (permalink) Old May 1st, 01, 10:25 AM
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Unless you crushed a pipe I would rule the pipes out... What are your timing numbers, inital and full? Can you be sure your stat is opening when it should?

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post #6 of 12 (permalink) Old May 3rd, 01, 10:08 AM Thread Starter
 
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total timing is sat at 28 degrees advance,this the 2nd thermosat in the car. Someone told me to try running a fan with a fan clutch,does anybody know what year I should look for, I'am going to the local pick-u-parts??????????
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post #7 of 12 (permalink) Old May 3rd, 01, 11:12 AM
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I heard that some of the flex-a-lite fans are to flexible and don't move enough air. I also heard that there is some heat resistant material that you can put on the top and bottom between the radiator and cowl to stop air from being sucked in the top rather than through the front.
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post #8 of 12 (permalink) Old May 3rd, 01, 11:24 AM
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I know strokers don't like as much timing as other sbc's but you should be able to get 32-34 deg btdc total without pinging.. A common source for overheating at stop lights is low inital timing. The fan change is a step in the right direction as well.

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post #9 of 12 (permalink) Old May 3rd, 01, 05:37 PM
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Actually, I found that the more I advance the timing the hotter it runs.
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post #10 of 12 (permalink) Old May 3rd, 01, 05:53 PM
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<BLOCKQUOTE>quote:</font><HR>Originally posted by TheGreen68:
Actually, I found that the more I advance the timing the hotter it runs.<HR></BLOCKQUOTE>

You have other problems then...

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post #11 of 12 (permalink) Old May 5th, 01, 06:47 PM
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I think a three tube core is marginal in my coastal CA climate.
I'd go with at least a four core and make sure the trans cooler does not interfere with the radiator air flow.
I worked on a v8 Vega that we could not run a trans cooler ahead of the radiator.
We found a long finned tube that could be bent around the edges of the radiator and it got us by.
With the flex fan, you may find the air flow changes greatly with a small change in RPM's.
do a test by free reving and observing air flow from the fan while watching the RPM's.
At some point the blades will flatten out and quit pulling air.
David

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post #12 of 12 (permalink) Old May 6th, 01, 11:21 AM Thread Starter
 
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I just put a hayden electric fan 16" on the car with a 190 degree electric thermosat switch to activate the fan, then the temp got to 190 the fan kick on the temp stayed around 190-200 degrees, I let the car idle for around 20-30 min. The out side temp is mid 80's, I went for a spin the temp stayed at 200 degrees, when I got back I let the car idle again and this time the temp was rising to 240, I shut the car down and I could hear the radiator starting to boil over to the overflow catch can. Timing is set at 32 degrees advance. Thanks for all your replys
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