11-23-2013, 04:28 AM
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CC Member
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Join Date: May 2008
Location: Brisbane,
QLD
Cobra Make, Engine:
Posts: 2,797
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As others have said, if you must touch the manifold, only a cleanup to remove the casting flash would suffice.
Smooth flowing is good (no bumps) but a rough finish is desirable to keep the fuel in suspension.
A slightly smaller manifold port than the cylinder head gives a step to reversion pulses and can help reduce "standoff".
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Gary
Gold Certified Holden Technician
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