steam holes sbc 400 heads/

Old 01-29-2009, 01:50 AM
  #1  
JEFF69Z28
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Default steam holes sbc 400 heads/

Do i really need to have them?im only going to race the car.I would hate to drill into my new afr heads.
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Old 01-29-2009, 06:58 AM
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desoto30
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According to what I have read no.The proviso was,as long as the engine sees little to no low speed operation.
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Old 01-29-2009, 09:49 AM
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zipper06
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Nope not on a drag car, no one i know ever drills the steam holes in their heads, in fact use a gasket that does not include the steam holes.

JMO


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Old 01-29-2009, 02:32 PM
  #4  
JEFF69Z28
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AFTER READING DART AND AFR'S WEB SITE THEY RECCOMEND DRILLING STEAM HOLES,I GUESS IT'S ALL UP TO EACH INDIVIDUAL ENGINE BUILDER.
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Old 01-29-2009, 04:07 PM
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jmarksdragster
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Between my brother, Dad, an myself we have run a LOT of 400's starting about 1979, never drilled any, even on street engines. Don't waste your time.

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Old 01-30-2009, 02:39 AM
  #6  
us7race
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No need to drill them. I have ran 400 blocks for about 4 years now everyweekend at the track and no issue's.
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Old 02-01-2009, 03:34 AM
  #7  
johnracer
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Agreed, no need for holes....
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