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Ferrea valves

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Old 01-22-2011, 01:31 AM
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Default Ferrea valves
So my head rebuilder wants to use Ferrea valves. I've read several instances where the Ferrea springs and retainers make contact with the rollers and cause issues. Can I use OEM AP2 springs and retainers with Ferrea valves? The head will be getting a port and polish and valve job.
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Old 01-22-2011, 01:45 AM
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I'm running factory AP1 intake springs all around with Ferrea valves and ti retainers.
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Old 01-22-2011, 07:18 AM
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Perfect. Thanks. Are you using oversize valves?
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Old 01-22-2011, 02:43 PM
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+0.5mm
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Old 01-23-2011, 03:34 PM
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You can run different valves/springs but you really should keep your retainers and keepers of the same company.
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