Anyone CC'd the Combustion Chambers on EQ Magnum Heads

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plumcrazy 101

plumcrazy 101

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Thought these EQ cylinder heads were 62 cc in the combustion chamber from the factory.
I cc'd the heads today that Brian at IMM did for me and the cc's averaged 65.4 cc's with the 2.02 valves installed.
I know there is factory tolerance but is this normal?
 
Maybe they weren't... maybe the valve head style is recessed cup instead of flat and made the diff...maybe the valve seats were set lower to achieve middle ground with a spring height requirement.

Have them milled, if they clear the intake valves of course... otherwise disassemble first then mill. Good luck!
 
plumcrazy 101 said:
Thought these EQ cylinder heads were 62 cc in the combustion chamber from the factory.
I cc'd the heads today that Brian at IMM did for me and the cc's averaged 65.4 cc's with the 2.02 valves installed.
I know there is factory tolerance but is this normal?
Click to expand...

You are correct in thinking they were supposed to be 62cc even with Hughes 2.02 valve.
I copied and pasted this right off their website.

HUG 4676

MAGNUM EQ IRON HEADS W/ 2.02" INT VALVES

MAGNUM STYLE INTAKE PATTERN ,62CC COMBUSTION CHAMBER W/ 2.02" INT, 1.6
 
MoparLeo said:
Ask Brian at IMM and ask Him what gives . Who would know better ? Someone on this forum who wasn't there ?
Click to expand...
Brian didn't mill the heads so they are stock factory so I thought someone on the forum would know.
I will phone Brian today and find out what they actually cc's of the EQ heads are.
 
Had the set I purchased new from Clearwater Cyl Heads with a few thousand miles cc'd by PRH and they were 64.5 cc's This was after a new guides, and clean up, etc. 1.92" valves.
 
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