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Old 08-21-2006, 09:28 AM
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overheating sbc race car

I have a 400 motown block with 12.5 comp ratio, dart 2 heads, predator carb and rpm manifold. during competition got to 270*, went to an external oil cooler, reduced timing to 8* and went to synthetic oil. last race went to 260*. My question is about the Edelbrock RPM maifold with the rear water bosses and what I need to correctly and efficiently connect the rear to the front water crossover. It appears that the vacuum advance will get in the way on the right side. The rear have 3/8 npt and the front have 1/2 npt. Any help and guideance will be much apprciated.

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Old 08-21-2006, 09:33 AM
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heat

If you only have 8* of timing on it, that's the problem...

It should have 25 or so initial and 34/36 total... If it's a race only car you might want to lock it out at 36 degrees as a test to see how it works.


Keith
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Old 08-21-2006, 09:58 AM
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Plumbing the intake won't bring your temps down from 270.

220 or about that the plumbing might help a little. What type of car, and fuel, engine ect...
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Old 08-21-2006, 09:59 AM
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I guess this is a circle track car as no drag car would get this hot in a couple minutes.

I would also suggest using Evans Coolant and a high efficiency (not just high volume) water pump such as Stewart.

You might also consider airflow through the radiator. Often air is not doing what it looks like it should be doing.
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Old 08-21-2006, 10:25 AM
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The car is an off road racer, 1979 Nova.

grub
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