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Old 03-07-2010, 02:23 AM
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RHS pro action 320s

Is RHS pro action 320s Summit Racing Part Number CCA-11301-03 considered open chamber or closed chamber? It doesn't say anything anywhere that I've read. I'm trying to figure out if they'll clear .215 dome pistons in a mark IV 468 without having them or the motor here...

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Old 03-07-2010, 04:15 AM
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Quote:
Originally Posted by ekacpuc
Is RHS pro action 320s Summit Racing Part Number CCA-11301-03 considered open chamber or closed chamber? It doesn't say anything anywhere that I've read. I'm trying to figure out if they'll clear .215 dome pistons in a mark IV 468 without having them or the motor here...
With a combustion chamber volume of 119 cc's, they're open chamber heads.
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Old 03-07-2010, 11:29 AM
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Hi-Jack........

Welcome back techinspector1, hope you had a restful hiatus. They miss you at CHR!!
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Old 03-07-2010, 04:54 PM
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The Dart Iron eagle 308cc intake has a 119cc combustion chamber and its got a heart shaped chamber.. I hear it wont clear the dome pistons (Dart). That's what I was originaly wanting to put on until I heard that the pistons require an open chamber. Only brand of heads I see at summit that advertises an open chamber are world merlin..

Then the RHS pro action shouldn't be a problem with the dome pistons... I really wanted the Dart 308s seems like the 320 intake is a little more than I want on the RHS..

Last edited by ekacpuc; 03-07-2010 at 05:01 PM.
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Old 03-07-2010, 06:12 PM
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Quote:
Originally Posted by ekacpuc
The Dart Iron eagle 308cc intake has a 119cc combustion chamber and its got a heart shaped chamber.. I hear it wont clear the dome pistons (Dart). That's what I was originaly wanting to put on until I heard that the pistons require an open chamber. Only brand of heads I see at summit that advertises an open chamber are world merlin..

Then the RHS pro action shouldn't be a problem with the dome pistons... I really wanted the Dart 308s seems like the 320 intake is a little more than I want on the RHS..
Before you order anything, get on the phone and talk to these guys. They know their product better than anyone.
http://www.dartheads.com/contact.php
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