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02-15-2021, 03:54 PM
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#1 |
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Registered User
Join Date: May 2017
Location: Gilbert, AZ
Posts: 33
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250 Inline 6 - Offenhouser Intake Questions
Hoping someone can help me out with my new setup on my Inline 6 250 engine. Im adding the Offenhouser Intake and I cannot figure out what do with the two holes on the back of the intake?
I know it is not for Water as the Heat Plate is on the bottom which I have that covered. Just not sure what to do with these two holes pictured. |
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02-15-2021, 04:05 PM
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#2 |
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Registered User
Join Date: Aug 2006
Location: LaSalle Mi
Posts: 531
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Re: 250 Inline 6 - Offenhouser Intake Questions
Vacuum ports?
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02-15-2021, 04:57 PM
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#3 |
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Carpe manana
  
Join Date: Dec 2010
Location: Eau Claire, WI
Posts: 12,480
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Re: 250 Inline 6 - Offenhouser Intake Questions
Bump to engine and drivetrain
__________________
1972 K5 CST Highlander Blazer: http://67-72chevytrucks.com/vboard/s...d.php?t=708547 1972 K20 Cheyenne Super: http://67-72chevytrucks.com/vboard/s...d.php?t=528308  Members met: ORANGBLAZ, 2003 silverado, MikeCofield, BB72CHEVKT, Duncan&Son, Sameyrasmea72, THENEWMEXICAN, HotRod C/10, brianthelion02, Sport/Truck, ryanroo, michael bustamante, Dirt's72, Already Gone, WestButteTruck, 57taskforce, Moreyel, painterljp, AASmedic, SoCoC10, Lumaestas, carbuff382, Chevyland
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02-15-2021, 05:40 PM
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#4 |
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Registered User
Join Date: Aug 2012
Location: Oklahoma City, OK
Posts: 2,659
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Re: 250 Inline 6 - Offenhouser Intake Questions
2nd the vacuum port thought. If you don't need them, plug them.
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02-17-2021, 03:45 AM
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#5 |
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Registered User
Join Date: Jan 2013
Location: Calgary Alberta
Posts: 1,170
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Re: 250 Inline 6 - Offenhouser Intake Questions
Brake booster, PCV?
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02-17-2021, 08:07 PM
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#6 |
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Senior Member
 
Join Date: Dec 2011
Location: Moraga, CA
Posts: 812
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Re: 250 Inline 6 - Offenhouser Intake Questions
Or they may me to make it compatible with a later model that needed a temperature sensor or temperature activated vacuum switch for emissions.
And like the other guys have said... If you don't need them, plug. BTW, it's really good looking manifold.
__________________
(Very) Slow-Going Build Thread: Stock 1970 Short Step with Stock 1970 LT-1 http://67-72chevytrucks.com/vboard/s...d.php?t=567340 |
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